AC Power

For Business-Critical Continuity

Liebert NX™ UPS

Installation Manual–10-30kVA, 208V, 60Hz

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 TABLE OF CONTENTS
IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
GLOSSARY OF SYMBOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.0 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1.1 External Inspections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Internal Inspections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2.1 Storing for Delayed Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.3 Preliminary Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.3.1 Identification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4 UPS Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4.1 Positioning the UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4.2 Environmental Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4.3 Special Considerations for 1+N Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.5 Considerations in Moving the NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.6 Mechanical Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.6.1 Clearances. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.6.2 Floor Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.6.3 Cable Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.6.4 Optional Cabinets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.0 ELECTRICAL CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
2.1 Power Cabling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1.1 Cable Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1.2 UPS Input Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1.3 Cabling Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1.4 Cable Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.1.5 Safety Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.1.6 Protective Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.1.7 Cabling Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.2 Control Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.2.1 Monitor Board Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.3 Dry Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.3.1 Input Dry Contacts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.3.2 Maintenance Bypass Cabinet Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.3.3 BCB Box Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.3.4 Output Dry Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.3.5 EPO Input—Optional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.0 BATTERY INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.3 UPS Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

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 3.4 External Battery Cabinet Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.4.1 Matching Battery Cabinets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.4.2 Connecting the Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.4.3 Installation Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.4.4 Connecting the Battery Cabinet to the UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.5 Non-Standard Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.0 MAINTENANCE BYPASS CABINET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.1 Bypass Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.2 Normal (UPS) Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.3 Bypass Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.4 Maintenance Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.5 Locating the Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.6 Cable Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.6.1 Wiring Preparation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.6.2 Power Cable Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.6.3 Input/Output Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.7 Bolting Cabinets Together . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.0 OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.1 Load Bus Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.1.1 Performance Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.1.2 DBS Cable and Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.2 Configuring Parallel System Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.2.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.2.2 Features of Parallel System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.2.3 Operating Principles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.2.4 Operation Modes Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.3 Installing Parallel System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.3.1 Conditions for Parallel System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.3.2 Cabinet Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.3.3 Preliminary Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.3.4 Protective Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.3.5 Power Cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.3.6 Parallel Control Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.3.7 Emergency Power Off (EPO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
5.4 Battery Circuit Breaker Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
6.0 UPS SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
6.1 Conformity and Standards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
6.2 UPS Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
6.3 UPS Mechanical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
6.4 UPS Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
6.4.1 Battery Manufacturers and Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
6.4.2 Input Rectifier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
6.4.3 DC Intermediate Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
6.4.4 Inverter Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
6.4.5 Bypass Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

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 7.0 INSTALLATION DRAWINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
8.0 SPECIFICATIONS AND TECHNICAL DATA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
8.1 Lug Size and Torque Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
8.2 Cable Lengths: Floor to Connection Point Inside UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

FIGURES
Figure 1 Cabinet arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 2 Single module block diagram—dual input configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 3 Input busbars . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 4 Battery fuses and connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 5 Ground and neutral busbar connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 6 Monitor board U2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 7 Auxiliary terminal block detail (Monitoring Board) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 8 Input dry contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 9 Jumper connection for BCB interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 10 Output dry contacts and EPO wiring for firmware before M170 . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 11 EPO wiring for firmware M200 or later . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 12 Battery cabinet—details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 13 Narrow battery cabinet, 27 in. (690mm) - rear view. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 14 Wide battery cabinet, 57 in. (1488mm) - front view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 15 Internal cable wiring from battery cabinet to Liebert NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 16 Battery tray and supports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 17 Single UPS with external Maintenance Bypass Cabinet—typical configuration . . . . . . . . . . . . . 25
Figure 18 Maintenance Bypass Cabinet—access plate removed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 19 Maintenance Bypass Cabinet wiring access panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 20 Maintenance bypass control wire location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 21 Load Bus Synchronization cable connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 22 1+N system block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 23 Connecting '1+N' system parallel control cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 24 Auxiliary dry contact cables for output breaker in multi-module system . . . . . . . . . . . . . . . . . . . 34
Figure 25 Dry contacts, multiple UPS modules with distribution panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 26 Connecting EPO push button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 27 Battery circuit breaker box connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Figure 28 Dimensional view- front and left side views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Figure 29 Dimensions continued—top and bottom views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Figure 30 Main components—typical unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Figure 31 Cable connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Figure 32 Location of internal batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Figure 33 Battery connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Figure 34 Battery cabinet interconnection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Figure 35 Maintenance Bypass interconnection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Figure 36 NX 1+1 parallel cabinet interconnections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Figure 37 Lineup detail—SlimLine distribution cabinet to NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Figure 38 Lineup detail—1+N Type A connection to NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Figure 39 Lineup detail—1+N Type A1 connection to NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Figure 40 Lineup detail—1+N Type B connection to NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Figure 41 Lineup detail—1+N Type B1 connection to NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Figure 42 Lineup detail—1+N Type C connection to NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Figure 43 Lineup detail—1+N Type C1 connection to NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Figure 44 Lineup detail—1+N Type D connection to NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Figure 45 SlimLine locations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

iii

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 TABLES
Table 1 Input dry contacts at X3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 2 Maintenance bypass cabinet interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 3 BCB box interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 4 Output dry contact relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 5 EPO input contact relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 6 EPO input contact relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table 7 Available battery circuit breaker boxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Table 8 Environmental characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Table 9 Mechanical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Table 10 UPS terminal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Table 11 Approved batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Table 12 Rectifier input power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Table 13 DC intermediate circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Table 14 Inverter output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 15 Bypass input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 16 Liebert -supplied interconnect wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Table 17 Liebert-supplied interconnect wiring for Maintenance Bypass Cabinet . . . . . . . . . . . . . . . . . . . . 48
Table 18 Liebert-supplied interconnect wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Table 19 Liebert-supplied interconnect wiring—SlimLine distribution cabinet to NX . . . . . . . . . . . . . . . . 50
Table 20 Interconnect wiring—1+N Type A connection to NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Table 21 Interconnect wiring—1+N Type A1 connection to NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Table 22 Interconnect wiring—1+N Type B connection to NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Table 23 Interconnect wiring—1+N Type B1 connection to NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Table 24 Interconnect wiring—1+N Type C connection to NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Table 25 Interconnect wiring—1+N Type C1 connection to NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Table 26 Interconnect wiring—1+N Type D connection to NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Table 27 Torque specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Table 28 Battery torque rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Table 29 Maintenance bypass cabinet electrical data (single input). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Table 30 Maintenance bypass cabinet electrical data (dual input) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Table 31 Multi-module bypass cabinet electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Table 32 Maintenance bypass cabinet lug sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Table 33 Maintenance Bypass Cabinet weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Table 34 Battery cabinet physical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Table 35 Maintenance bypass cabinet dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Table 36 Multi-module paralleling cabinet dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Table 37 Distance to connection points on the NX UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

iv

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 IMPORTANT SAFETY INSTRUCTIONS

SAVE THESE INSTRUCTIONS

This manual contains important instructions that should be followed during installation of your
Liebert NX™ UPS and batteries.
Read this manual thoroughly, paying special attention to the sections that apply to your installation,
before working with the UPS. Retain this manual for use by installing personnel.

! WARNING
Exercise extreme care when handling UPS cabinets to avoid equipment damage or injury to
personnel. The UPS module weight ranges from 850 to 1400 lb. (386 to 635kg).
Determine unit weight and locate center of gravity symbols
before handling the UPS. Test lift and balance the cabinet
before transporting. Never tilt equipment more than 15 degrees from vertical.
Battery manufacturers supply details of the necessary precautions to be observed when
working on, or in the vicinity of, a large bank of battery cells. These precautions should be
followed implicitly at all times.
Follow all battery safety precautions when installing, charging or servicing batteries. In
addition to the hazard of electric shock, gas produced by batteries can be explosive and
sulfuric acid can cause severe burns. When connected, the nominal battery voltage is 288VDC
and is potentially lethal.
In case of fire involving electrical equipment, use only carbon dioxide fire extinguishers or
those approved for use in fighting electrical fires.
Extreme caution is required when performing maintenance.
Be constantly aware that the UPS system contains high DC as well as AC voltages.
Check for voltage with both AC and DC voltmeters prior to making contact.

! WARNING
As with other types of high power equipment, dangerous voltages are present within the UPS
and battery enclosure. The risk of contact with these voltages is minimized as the live
component parts are housed behind a hinged, lockable door. Further internal safety screens
make the equipment protected to IP20 standards.
No risk exists to any personnel when operating the equipment in the normal manner,
following the recommended operating procedures.
All equipment maintenance and servicing procedures involve internal access and should be
carried out only by trained personnel.

! WARNING
High ground leakage current: Ground connection is essential before connecting the input
supply.
This equipment must be grounded in accordance with local electrical codes.
Maximum load must not exceed that shown on the UPS rating label.

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 ! CAUTION
This equipment is fitted with RFI suppression filters.
Ground leakage current exceeds 3.5 mA and is less than 1000 mA.
Transient and steady-state ground leakage currents, which may occur when starting the
equipment, should be taken into account when selecting instantaneous residual current
circuit breakers (RCCBs) or residual current devices (RCDs).
RCCBs must be selected sensitive to DC unidirectional pulses (Class A) and insensitive to
transient current pulses.
Note also that the ground leakage currents of the load will be carried by this RCCB or RCD.

! WARNING
Under typical operation and with all UPS doors closed, only normal safety precautions are
necessary. The area around the UPS system should be kept free of puddles of water, excess
moisture and debris.
Special safety precautions are required for procedures involving handling, installation and
maintenance of the UPS system and the battery. Observe all safety precautions in this
manual before handling or installing the UPS system. Observe all precautions in the
Operation and Maintenance Manual, before as well as during performance of all maintenance
procedures. Observe all battery safety precautions before working on or near the battery.
This equipment contains several circuits that are energized with high voltage. Only
test equipment designed for troubleshooting should be used. This is particularly true for
oscilloscopes. Always check with an AC and DC voltmeter to ensure safety before making
contact or using tools. Even when the power is turned Off, dangerously high electric charges
may exist within the UPS.
All power and control wiring should be installed by a qualified electrician. All power
and control wiring must comply with the NEC and applicable local codes.
ONLY qualified service personnel should perform maintenance on the UPS system.
When performing maintenance with any part of the equipment under power, service
personnel and test equipment should be standing on rubber mats. The service personnel
should wear insulating shoes for isolation from direct contact with the floor (earth ground).
Never work alone, even if all power is removed from the equipment. A second person should
be standing by to assist and summon help in case an accident should occur.

! CAUTION
This unit complies with the limits for a Class A digital device, pursuant to Part 15 Subpart J
of the FCC rules. These limits provide reasonable protection against harmful interference in a
commercial environment. This unit generates, uses and radiates radio frequency energy and,
if not installed and used in accordance with this instruction manual, may cause harmful
interference to radio communications. This unit is not designed for use in a residential area.
Operation of this unit in a residential area may cause harmful interference that the user must
correct at his own expense.
Battery Cabinet Precautions
The following warning applies to all battery cabinets supplied with UPS systems. Additional warn-
ings and cautions applicable to battery cabinets may be found in 3.0 - Battery Installation.

! WARNING
Internal battery strapping must be verified by manufacturer prior to moving a battery cabinet
(after initial installation).
• Battery cabinets contain non-spillable batteries.
• Keep units upright.
• Do not stack.
• Do not tilt.
Failure to heed this warning could result in smoke, fire or electric hazard.
Call 1-800-LIEBERT before moving battery cabinets (after initial installation).

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 GLOSSARY OF SYMBOLS

Risk of electrical shock

! Indicates caution followed by important instructions

AC input

AC output

i Requests the user to consult the manual

- +
Indicates the unit contains a valve-regulated lead acid battery
PbH2SO4

R Recycle

DC voltage

Equipment grounding conductor

Bonded to ground

AC voltage

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 Installation

1.0 INSTALLATION
The Liebert NX™ UPS is designed primarily for telecommunications and data processing applica-
tions. Liebert Corporation neither recommends nor knowingly sells this product for use with life sup-
port and other designated “critical” devices.
This section describes the NX’s environmental requirements and mechanical considerations that
must be taken into account when planning the positioning and cabling of the UPS equipment.
Because every site is unique, this section presents a guide to general procedures and practices that
should be observed by the installing engineer, rather than step-by-step installation instructions.

! WARNING
Do not apply electrical power to the UPS equipment before the arrival of the commissioning
engineer.

! WARNING
The UPS equipment should be installed by a qualified engineer in accordance with the
information contained in this section.

! WARNING
Special care should be taken when working with the batteries associated with this equipment.
When connected together, the nominal battery voltage is 288VDC and is potentially lethal.
• Eye protection should be worn to prevent injury from accidental electrical arcs.
• Remove rings, watches and all metal objects.
• Only use tools with insulated handles.
• Wear rubber gloves.
If a battery leaks electrolyte or is otherwise physically damaged, it must be replaced, stored in
a container resistant to sulfuric acid and disposed of in accordance with local regulations.
If electrolyte comes into contact with skin, the affected area should be washed immediately
with large amounts of water.

NOTE
The NX UPS can be used in TN utility system.

1.1 External Inspections

1. While the UPS system is still on the truck, inspect the equipment and shipping container(s) for
any signs of damage or mishandling. Do not attempt to install the system if damage is apparent.
If any damage is noted, file a damage claim with the shipping agency within 24 hours and contact
Liebert Global Services at 1-800-LIEBERT to inform them of the damage claim and the condition
of the equipment.
2. Compare the contents of the shipment with the bill of lading. Report any missing items to the
carrier and your local Liebert representative immediately.

1.2 Internal Inspections

1. Remove any packaging material, then visually examine the UPS and battery equipment for
transit damage, both internally and externally. Report any such damage to the shipper and to
Liebert immediately.
2. Check the nameplate inside the cabinet door to verify that the model number and rating
correspond to the ones specified. Record the model number and serial number in the front of this
installation manual. This information is necessary should service be required.
3. Check for loose connections or unsecured components in the cabinet.
4. Check for shipping damage to internal components.

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 Installation

1.2.1 Storing for Delayed Installation

If the equipment will not be installed immediately, it must be stored indoors where the humidity is no
higher than 90% and the temperature is no higher than 104°F (40°C). The storage area must protect
the NX from excessive moisture (see 6.2 - UPS Environmental).

! CAUTION
If the UPS must remain disconnected from power for more than six (6) months, the battery
must be recharged before use. To charge the batteries, the unit must be connected to utility
power and started up—the charger operates only while the NX is operating.

! CAUTION
When batteries are installed in the UPS or are cabinet-mounted adjacent to the UPS unit, the
battery—not the UPS—dictates the designed maximum ambient temperature.

1.3 Preliminary Checks

1.3.1 Identification
The equipment supplied has an identification tag on the back of the main door listing the type and
size of the UPS.

1.4 UPS Location

1.4.1 Positioning the UPS
Choose a location for the UPS that offers:
• Easy connection to inputs, outputs and auxiliary equipment
• Enough space to service the UPS
• Air circulation sufficient to expel heat produced by UPS
• Protection against moisture and excessive humidity
• Protection against dust and other particulate matter
• Compliance with fire prevention regulations and practices
• Operating environment temperature of 74-80°F (23-27°C) for maximum battery efficiency

1.4.2 Environmental Considerations

Before installing the NX, verify that the UPS room satisfies the environmental conditions stipulated
in 6.2 - UPS Environmental, paying particular attention to the ambient temperature and air
exchange system.
The UPS unit should be installed in a cool, dry, clean-air environment with adequate ventilation to
keep the ambient temperature within the specified operating range 32°F to 104°F (0°C to 40°C).
For optimal UPS and battery system performance and service life, maintain the operating tempera-
ture within the range of 74-80°F, (23-27°C).
The NX UPS cooled by internal fans. Cooling air enters the unit through the front of the unit and is
exhausted out the top. To permit proper air flow and prevent overheating, do NOT block or cover the
ventilation openings or blow air down onto the unit. Ventilation clearance above the unit must be a
minimum of 24 in. (610mm).
See Table 9 for details on heat dissipation.
Battery Location
Temperature is a major factor in determining battery life and capacity. Battery manufacturers recom-
mend an operating temperature of 77°F (25°C). Ambient temperatures warmer than this reduce bat-
tery life; temperatures below this reduces battery capacity. In a typical installation, battery
temperature should be maintained between 74°F and 80°F (23-27°C). Batteries should be placed
where there are no main heat sources or air inlets to prevent portions of batteries from being either
much warmer or much cooler than other parts of the batteries.

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 Installation

1.4.3 Special Considerations for 1+N Systems

1. Consider the grounding configuration of your system before finalizing module placement. For
optimal ground performance, the NX modules should be close together.
2. For optimal load-sharing performance, the UPS output cables should be approximately the same
length, plus or minus 20 percent.
3. Position modules in such a way as to minimize the length of power cables and control wiring
between UPS modules and the paralleling cabinet.
1.5 Considerations in Moving the NX
Ensure that the UPS weight is within the designated surface weight loading (lb./ft2 or kg/cm2) of any
handling equipment. See Table 9 for weights of various units.
To move the UPS and optional battery cabinets:
• The NX may be rolled on its casters when moving the unit a short distance. For longer distances,
move the UPS with a forklift or similar equipment to ease the relocation and to reduce vibration.
The optional battery cabinets should be moved with a forklift or similar equipment.

! WARNING
Ensure that any equipment that will be used to move the NX has sufficient lifting capacity.
The NX weight ranges from 850 to 1400 lb. (386 to 635kg). See Table 9 for details. The UPS
presents a tipping hazard. Do not tilt the NX further than 15 degrees from vertical.
The UPS is fitted with casters—take care to prevent movement when unbolting the
equipment from its shipping pallet. Ensure adequate personnel and lifting equipment are
available when taking the NX off its shipping pallet. Do not tilt the unit more than 15 degrees
from center.

! WARNING
The casters are strong enough for movement across even surfaces only. Casters may fail if
they are subjected to shock loading, such as being dropped or rolled over holes in the floor or
obstructions. Such failure may cause the unit to tip over, injuring personnel and damaging
the equipment.
Care must be taken when maneuvering units fitted with batteries. Keep such moves to a
minimum. For further information, see Battery Cabinet Precautions on page 2.

Final Position
When the equipment has been finally positioned, ensure that the adjustable stops are set so that the
UPS will remain stationary and stable (see 7.0 - Installation Drawings).
1.6 Mechanical Considerations
The NX is constructed with a steel frame and removable panels. Top and side panels are secured to
the chassis by screws. The doors may be opened for access to power connections bars, auxiliary termi-
nals blocks and power switches.
The UPS comes with an operator control panel, which provides basic operational status and alarm
information. The cabinet houses both the power components and the internal batteries. Cooling is
provided by internal fans. The unit sits on four casters. Adjustable stops are provided to prevent the
UPS from moving once it has been moved to its final position.

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 Installation

1.6.1 Clearances
There are no ventilation grilles on the sides or rear of the UPS. The sides must be accessible during
installation. After installation, the unit may be placed with the rear against a wall and optional cabi-
nets on either side.
To enable routine tightening of power terminations within the UPS, make sure there is sufficient
clearance in front of the NX to permit free passage of personnel with the door fully opened.
Leave a minimum of 2 ft. (610mm) between the top of the UPS and the ceiling to permit adequate air
circulation above the unit. Liebert recommends against using air conditioning or other systems that
blow air onto the top of the unit.
1.6.2 Floor Installation
The diagrams in 7.0 - Installation Drawings show the location of holes in the base plate for bolting
the equipment to the floor. An optional anchoring kit is available. For information, see your local Lie-
bert representative.
If the equipment is to be placed on a raised floor, it should be mounted on a pedestal that will support
the equipment point loading. Refer to the bottom view in Figure 28 to design this pedestal.
1.6.3 Cable Entry
Cables can enter the NX from the top or bottom. Cable entry is made possible by removing a metal
plate attached to the UPS.
These plates are designed to allow the personnel to punch holes for fitting and securing the conduit.
Once the conduit holes are punched, these plates should be reattached to the UPS.
Connecting cables to the NX may require that the UPS be accessible from the left side to allow per-
sonnel to complete the connections and make necessary adjustments. After installation is complete,
the NX may be serviced from the front.

NOTE
When installing the UPS, the customer must provide a disconnect with overcurrent protection
at the output of the UPS.

10-30kVA UPS
The 10-30kVA NX consists of a single cabinet housing the UPS components and the internal battery
string.
Optional battery cabinets are available to provide extended run time. Each cabinet houses additional
strings of batteries that operate in parallel with the NX’s internal batteries. The cabinets are
designed to be bolted to the right side of the UPS (see Figure 1). Refer to 3.4 - External Battery
Cabinet Installation for details.
Optional maintenance bypass/transformer cabinets (MBC-T) are available. These cabinets house the
components necessary to:
• Provide an external wrap-around maintenance bypass switch for servicing the UPS
• Provide voltage transformation for site or application requirements
• Provide a means for neutral isolation and allow installations for site without a neutral conductor
MBC-T cabinets are designed to be bolted to the left side of the UPS (see Figure 1). Refer to 4.5 -
Locating the Cabinet, for further details.

System Composition
A UPS system can comprise a number of equipment cabinets, depending on the individual system
design requirements—e.g., UPS cabinet and External Bypass cabinet. In general, all cabinets used
will be the same height and are designed to be positioned side-by-side to form an aesthetically appeal-
ing equipment suite.

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 Installation

1.6.4 Optional Cabinets

If your NX installation includes a Maintenance Bypass Cabinet, the NX must be positioned to allow
the Maintenance Bypass Cabinet to be bolted to left side of the NX (see Figure 1). Cables from the
Maintenance Bypass Cabinet must be brought through the bottom side of the NX for connection.
The Maintenance Bypass Cabinet must be cabled and bolted to the NX before the UPS and bypass
cabinet are moved into their final position. Connect the input wiring to the Maintenance Bypass Cab-
inet ONLY after the units are connected and positioned.
Battery cabinets may be bolted to either side of the NX, unless used in configurations that include a
Maintenance Bypass Cabinet. If used with a Maintenance Bypass Cabinet, battery cabinets must be
installed on the right side of the UPS; see Figure 1 below.
Figure 1 Cabinet arrangement
ALL UNITS VIEWED FROM ABOVE

Liebert Liebert
Maintenance NX Maintenance NX
Bypass Bypass Battery Battery
Cabinet Cabinet Cabinet Cabinet

NX connected only to MBC NX connected to Maintenance Bypass Cabinet and Battery Cabinets
(MBC must be on left side of the NX) (MBC must be on left side of the NX)
(Battery Cabinets must be on the right side of the NX in this
configuration)

Liebert
NX
Battery Battery
Cabinet Cabinet

NX connected to Battery Cabinets

(Battery Cabinets may be on either side of the NX)

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 Electrical Connections

2.0 ELECTRICAL CONNECTIONS

The UPS requires both power and control cabling once it has been mechanically installed. All control
cables must run separate from power cables in metal conduits or metal ducts that are electrically
bonded to the metalwork of the cabinets to which they are connected.

! WARNING
Before connecting input power to the NX, ensure that you are aware of the location and
operation of the overcurrent protection devices that connect the UPS input/bypass supply to
the power distribution panel.
De-energize and lockout or tagout all incoming high- and low-voltage power circuits before
installing cables or making any electrical connections.

2.1 Power Cabling

2.1.1 Cable Rating
The main factors affecting the choice and size of cable are voltage, current (also taking into account
overcurrent), room temperature and conditions of installation of the cable.
The power cables of the system must be sized with respect to the following description:
• UPS input cables - The UPS input cables must be sized for the maximum input current, includ-
ing the maximum battery recharge current, given in Table 10, with respect to the unit rating and
the input AC voltage.
• UPS bypass and output cables - The bypass and output cables must be sized for the nominal
output current, given in Table 10, with respect to the unit rating and the output AC voltage.
• Battery cables - Each UPS unit has its own internal batteries factory-wired. If connecting an
external battery cabinet, the battery cables must be sized for the battery discharge current at the
end-of-discharge voltage, as given in Table 10, with respect to the unit rating.

NOTE
Table 10 gives nominal currents for determining the size of UPS power cables. Other
important factors to consider include cable route length and coordination with protective
devices.

The power cables can be sized to suit the UPS unit rating according to Table 10.

Lug Size and Torque Requirements

Refer to Table 27 for lug size and torque requirements.

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 Electrical Connections

2.1.2 UPS Input Configuration

Figure 2 illustrates the NX in a split bypass (dual-input) configuration. In this configuration the
Static Bypass and the Maintenance Bypass lines are supplied from a separate feed from the Main
input. Both sources must be protected externally with properly sized protective devices. By default,
the unit ships with internal links installed between the Bypass input and Main input (Single Input
configuration). To wire the unit as a dual input UPS, remove the links and wire the bypass to the
input bus bars, then wire the Main input directly to CB1 (see Figure 3).
Figure 2 Single module block diagram—dual input configuration

SW1/D Maintenance Bypass

Static Switch
SW1/C Contactor
Bypass Input

Rectifier Inverter UPS

Contactor SW1/A
AC Utility Input Output

CB1

SW1/B
Neutral Wire Discharge
Battery
Charger

Battery

2.1.3 Cabling Guidelines

The following are guidelines only and are superseded by local regulations and codes of practice where
applicable.
1. Take special care when determining the size of the neutral cable, as current circulating on the
neutral cable may be greater than nominal current in the case of non-linear loads. Refer to the
values in 6.4 - UPS Electrical Characteristics.
2. The ground conductor should be sized according to such factors as the fault rating, cable lengths
and type of protection. The ground cable connecting the UPS to the main ground system must
follow the most direct route possible. Control wiring and power wiring must be run in separate
conduit. Output and input cables must be run in separate conduit.
3. Consider using paralleled smaller cables for heavy currents—this can ease installation.
4. When sizing battery cables, a maximum voltage drop of 4VDC is permissible at the current
ratings in Table 10. For terminal connection sizing, see Table 10.
5. In most installations, especially parallel multi-module systems, the load equipment is connected
to a distribution network of individually protected busbars fed by the UPS output, rather than
connected directly to the UPS itself. When this is the case, the UPS output cables can be rated to
suit the individual distribution network demands rather than being fully load-rated.
NOTE
If more load is added to the distribution panel, the unit’s cabling must be resized.
6. When laying power cables, do not form coils; this will help avoid increasing formation of
electromagnetic interference.

NOTE
Left-side access may be required when making power connections. Cable connections should be
made before a cabinet is attached to the left side of the NX or before the UPS is placed where
another obstruction, such as a wall, is against the NX’s the left side.

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 Electrical Connections

2.1.4 Cable Connections

The rectifier input, bypass and output are easily accessible from the left side of the unit for installa-
tion. All require lug type terminations. They are connected to busbars on the left side of the NX and
below the switch, as shown in Figure 3. These busbars are accessible when the left side panel is
removed. Busbars to connect external batteries are accessible from the front of the UPS.

NOTE
External battery connection access requires removal of a protective panel on the lower front of
the UPS to the left of the bottom two battery shelves.

Figure 3 Input busbars

Remove these links
for dual input
configuration and
wire UPS Main input
directly to CB1

Output Busbars Rectifier Input

(Phases are Busbars
indicated by (Phases are
letters below the indicated by
bars) letters below the
bars)

C B A C B A
OUTPUT BYPASS

The internal batteries are connected with Anderson connectors inside the battery compartment. The
batteries are connected to fuses to protect the NX and connected equipment (see Figure 4).

Figure 4 Battery fuses and connections

Internal battery input

connections

150A 500V AC/DC 150A 500V AC/DC

B
Bussmann
B
Bussmann Battery fuses
MADE IN USA MADE IN USA
(fuses are behind
access plate on
front of UPS; see
Note on page 11)

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 Electrical Connections

2.1.5 Safety Ground

The safety ground busbar is located below the neutral input and output busbars as shown in
Figure 5 below. The safety ground cable must be connected to the ground busbar and bonded to each
cabinet in the system.
All cabinets and cable conduit should be grounded in accordance with local regulations.

! WARNING
Failure to follow proper grounding procedures can result in electric shock hazard to personnel
or the risk of fire, should a ground fault occur.

NOTE
Proper grounding significantly reduces problems in systems caused by electromagnetic
interference.

NOTE
The ground and neutral busbars are easily accessible when the left protective cover plate is
removed. Cable connections should be made before a cabinet is attached to the left side of the
NX or before the UPS is placed where another obstruction, such as a wall, is against the NX’s
the left side.

Figure 5 Ground and neutral busbar connections

Output neutral
busbar

OUTPUT INPUT
NEUTRAL NEUTRAL
Input neutral
busbar
Ground
busbar

2.1.6 Protective Devices

For safety, it is necessary to install circuit breakers in the input AC supply and external battery bat-
tery cabinets, external to the UPS system. Given that every installation has its own characteristics,
this section provides guidelines for qualified installation engineers with knowledge of operating prac-
tices, regulatory standards and the equipment to be installed.

UPS Rectifier and Bypass Input Supply

• Protection from excessive overcurrents and short circuits in power supply input
External overcurrent protection for the AC output circuit is to be provided. See 6.4 - UPS Elec-
trical Characteristics and Table 12 for overload capacity.
High-speed fuses and SCRs are used for internal battery circuit overcurrent protection. When an
external battery supply is used, overcurrent protection for the battery circuit is to be provided by
the customer.
• Dual Input
When wiring the UPS with dual inputs, the Rectifier input and the Bypass input must be pro-
tected separately. Size the breakers according to the input currents shown in Table 10.
System Output
When using an external distribution panel for load distribution, the output neutral and input neutral
must be separated at the input to the UPS.

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 Electrical Connections

2.1.7 Cabling Procedure

! CAUTION
The operations described in this section must be performed by authorized electricians or
qualified technical personnel. If you have any difficulties, contact your local Liebert
representative or Liebert Global Services.

NOTE
Hydraulic pressure pliers, combinative tools and piston ring pliers should be used to connect
AC wiring.
Once the equipment has been positioned and secured for operation, and the battery and ground col-
lars have been connected (see 2.1.4 - Cable Connections), connect the power cables as described
below. (Study the reference drawing in 7.0 - Installation Drawings.)
1. Verify that all incoming high and low voltage power circuits are de-energized and locked out or
tagged out before installing cables or making any electrical connections.
2. Remove the left side panel to gain easier access to the connections busbars.
3. Connect the safety ground and any easier bonding ground bus cables to the copper ground busbar
located on the bottom of the equipment below the power connections. All cabinets in the UPS
system must be connected to the user’s ground connection.

NOTE
The grounding and neutral bonding arrangement must comply with the National Electrical
Code and all applicable local codes.
4. Identify and make power connections with incoming cables according to Steps 5 through 11.

Common Input Connections

5. For common bypass and rectifier inputs, connect the AC input supply cables between the power
distribution panel and the UPS input busbars (A-B-C terminals) and tighten the connections to
44 lb-in. (5 N-m) using the M6 bolt provided.
6. The input neutral cable must be connected to the input neutral busbar (N). See Figure 5.

Dual Input Connections

7. For bypass connect the AC input supply cables between the power distribution panel and the UPS
input busbars (A-B-C terminals) and tighten the connections to 44 lb-in. (5 N-m) using the M6
bolt provided.
8. For Rectifier Input connect AC input supply cables between the power distribution panel and the
UPS input circuit breaker (A-B-C terminals)
9. The bypass and rectifier input neutral cables must be connected to the input neutral busbar (N).
See Figure 5.

NOTE
Both the rectifier and bypass feeds MUST come from the same utility source, except if the UPS
system includes either a configuration F or P external maintenance bypass cabinet.

Output System Connections—Ensure Correct Phase Rotation

10. Connect the system output cables between the UPS output busbars (A-B-C N terminals) and the
critical load and tighten the connections to 44 lb-in. (5 N-m) (M6 bolt).

! WARNING
If the load equipment will not be ready to accept power on the arrival of the commissioning
engineer, then ensure that the system output cables are safely isolated.

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 Electrical Connections

Internal UPS Battery Connections

The UPS internal batteries will be connected at the factory, EXCEPT the Anderson connections
between the shelves and to the fuses.

! WARNING
The DC bus is live when this internal battery connection is made. This connection is to be
performed ONLY by Liebert Global Services at startup.
Observe the battery cable polarity. Be sure that the battery connector is made with the cor-
rect polarity.
11. Refit all protective covers removed for cable installation

2.2 Control Cables

2.2.1 Monitor Board Features
Based on your site’s specific needs, the UPS may require auxiliary connections to manage the battery
system (external battery circuit breaker, battery temperature sensor), communicate with a personal
computer or provide alarm signaling to external devices or for Remote Emergency Power Off (REPO).
The monitor board, arranged for this purpose, is located on the rear of the operator access door. The
main features are:
• Input and Output dry contacts signal (one pair of contacts of relay)
• Emergency Power Off control (EPO)
• Environmental parameter input interface
• User communication (for data setting and user background monitor)
• Intellislot™ interface
• Modem interface
• Temperature detect interface
Figure 6 shows the relationship and connection between the monitoring (U2) board and other boards
in the UPS.
Figure 6 Monitor board U2

U1 K1
DSP Control Key & LED Board

M3
M5 U2
Parallel Logic
Auxiliary Power Monitor Board
Board

X1
User Interface
Board

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 Electrical Connections

Figure 7 Auxiliary terminal block detail (Monitoring Board)

J8
J3 J1
LCD J22 X7

J23 X6

J12

J9
J2
PWR
J15 MODEM
SNMP CARD X5
J16

J17

Intellislot 2
X4
X4
J13 J21 J25 J28 J4 J26 J30 J10 Intellislot 1
J24
Intellislot 3
BFP INV ACF EPO Dry in MBC BCB
NOTE: The black square ()
X1 X2 X3 on each slot indicates Pin 1.

2.3 Dry Contacts

The UPS provides input dry contacts and output dry contacts.

2.3.1 Input Dry Contacts

There are several input dry contacts at the X3 slot.

Figure 8 Input dry contacts

NOTE: The black square () on each slot indicates Pin 1.

Table 1 Input dry contacts at X3
Position Name Description
3
J4.1 ENV Battery Room Alarm (N.C.)
J4.2 BtG Battery Ground Fault Detection (N.C.)
1,2
J4.3 GEN Generator Join Detection (N.O.)
J4.4 +12V +12V Power
1 - Must be configured by configuration software before becoming active.
2 - When activated, the charger current can be limited, via software, to a percentage of the full charger current (0-100%).
3 - Activating this feature turns the battery charger off.

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 Electrical Connections

2.3.2 Maintenance Bypass Cabinet Interface

J26 and J30 are the MBC interface.
Table 2 Maintenance bypass cabinet interface
Position Name Description
J26.1 T_IT1 Input transformer over temperature (N.C.)
J26.2 AUX_I Reserved
J26.3 +12V +12V Power
J26.4 GND Power Ground
J30.1 FUSE Reserved
J30.2 F_FAN Fan Fail Alarm (N.C.)
1
J30.3 T_OT Output Transformer Overtemperature (N.C.)
J30.4 AUX_O Reserved
1 - Must be configured by software before becoming active

NOTE
All auxiliary cables of terminal must be double-insulated. Wire should be 20-16AWG stranded
for maximum runs between 82 and 164 feet (25-50m), respectively.
2.3.3 BCB Box Interface
J10 is the BCB box interface.
Table 3 BCB box interface
Position Name Description
J10.1 DRV BCB Driver Signal - Reserved
J10.2 FB BCB Contact State
J10.3 GND Power Ground
BCB On-Line - Input - This pin will become active when
J10.4 OL
BCB interface is connected. (N.O.)

NOTE
All auxiliary cables of terminal must be double-insulated. Wire should be 20-16AWG stranded
for maximum runs between 82 and 164 feet (25-50m), respectively.

NOTE
If BCB interface is connected, a jumper needs to added between Pin 3 and Pin 4.
Figure 9 Jumper connection for BCB interface

UPS Monitoring Board

J10
DRV
GND
FB
OL

Aux – N.O.
Aux – N.O.

Battery Circuit Breaker

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 Electrical Connections

2.3.4 Output Dry Contacts

There are three output dry contact relays at the X1 slot (see Figure 10 and Table 4).
Figure 10 Output dry contacts and EPO wiring for firmware before M170

+12V

X1 X2
J13 J21 J25 J28

EPO-H

ACF_O
BFP_O

ACF_C
EPO-L
BFP_C

ACF_S
BFP_S

INV_O
INV_C

INV_S
Table 4 Output dry contact relays
Position Name Description
J13.2 BFP_O Bypass feedback protection relay. Normally open. Closed when bypass SCR is shorted.
J13.3 BFP_S Bypass feedback protection relay center
J13.4 BFP_C Bypass feedback protection relay. Normally closed. Open when bypass SCR is shorted.
J21.2 INV_O Inverter mode relay. Normally open. Closed when UPS is in inverter mode.
J21.3 INV_S Inverter mode relay center
J21.4 INV_C Inverter mode relay. Normally closed. Open when UPS is in inverter mode.
J25.2 ACF_O Main input fault relay. Normally open. Closed when main input is in fault.
J25.3 ACF_S Main input fault relay center
J25.4 ACF_C Main input fault relay. Normally closed. Open when main input is in fault.

NOTE
All auxiliary cables of terminal must be double-insulated. Wire should be 20-16AWG stranded
for maximum runs between 82 and 164 feet (25-50m), respectively.
2.3.5 EPO Input—Optional
Firmware Before M200
The UPS has an Emergency Power Off (EPO) function that operates by a button on the control panel
or by a remote contact provided by the user. The EPO button is under a hinged, clear plastic shield.
The X2 slot, shown in Figure 10, is the remote EPO input interface. It is active when shorted from
EPO-L to EPO-H.
If an external Emergency Stop facility is required, it is connected terminals EPO-L to EPO-H of the
auxiliary terminal block (X2). It also is connected to the Normally Open remote stop switch between
these two terminals using shielded cable (see Figure 10 and Table 5). If this function is not used,
terminals EPO-L to EPO-H must be opened.
Table 5 EPO input contact relays
Position Name Description
J28.2 EPO_L Emergency Power Off Low
J28.4 EPO_H Emergency Power Off High

NOTE
The Emergency Stop action within the UPS shuts down the rectifier, inverter and static
bypass. It does not internally disconnect the input power supply.
To disconnect ALL power to the UPS, open the upstream feeder breaker(s) when the remote
EPO is activated.

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 Electrical Connections

Firmware M200 or Later

The UPS has an Emergency Power Off (EPO) function operated by a button on the control panel or by
a remote contact provided by the user. The EPO button is under a hinged, clear plastic shield.
The X2 slot, shown in Figure 11, is the remote EPO input interface. The EPO has a NO/NC contact
point becomes active when shorting terminals X2: 3 and 4 or open terminal connection X2: 2 and 1.
If an external Emergency Stop facility is required, it is connected terminals X2: 1&2 or X2: 3 and 4 of
the auxiliary terminal block (X2). It also is connected to the Normally Open or Normally Closed
remote stop switch between these two terminals using shielded cable (see Figure 11 and Table 6). If
this function is not used, terminals X2: 3 and 4 must be opened and X2: 1 and 2 must be closed.

Figure 11 EPO wiring for firmware M200 or later

X2
J28

EPO - NO EPO - NC
Table 6 EPO input contact relays
Position Name Description
J28.1 EPO_NC EPO Activated when opened to J28.2
J28.2 EPO_NC EPO Activated when opened to J28.1
J28.3 EPO_NO EPO Activated when shorted to J28.4
J28.4 EPO_NO EPO Activated when shorted to J28.3

NOTE
The Emergency Stop action within the UPS shuts down the rectifier, inverter and static
bypass. It does not internally disconnect the input power supply. To disconnect ALL power to
the UPS, open the upstream feeder breaker(s) when the remote EPO is activated.

NOTE
Normally Closed EPO – X2: 1,2, these terminals are supplied factory-linked on the monitor
board and must remain installed if using NC contacts.

NOTE
All auxiliary cables of terminal must be double-insulated. Wire should be 20-16AWG stranded
for maximum runs between 82 and 164 feet (25-50m), respectively.

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 Battery Installation

3.0 BATTERY INSTALLATION

3.1 Introduction
Liebert recommends that the batteries in external cabinets match the internal batteries in the NX in
manufacturer and type.
If using multiple sets of batteries connected in parallel to provide the required battery backup run
times, fit each set with an isolating device to permit working on one of the battery sets while leaving
the others in service and providing backup protection.
When replacing batteries, replace with the same manufacturer and type, or equivalent. See your Lie-
bert representative for a list approve batteries.

NOTE
The NX, as shipped, has 24 12-volt batteries installed internally in each unit.

3.2 Safety
Special care should be taken when working with the batteries associated with the NX system equip-
ment. When all batteries are connected together, the battery terminal voltage may exceed 324V and is
POTENTIALLY LETHAL.

! WARNING
The NX's internal batteries are connected and energized even if the UPS is turned Off. To
minimize the risk of injury, a qualified service person should disconnect internal batteries
before any maintenance is performed on the unit.
The center of the battery is connected to the neutral of the UPS and is grounded.
A battery can present a risk of electrical shock and high short circuit current. The following
precautions should be observed when working on batteries:
• Remove watches, rings and other metal objects.
• Use tools with insulated handles.
• Wear rubber gloves and boots.
• Do not lay tools or metal parts on top of batteries.
• Disconnect charging source prior to connecting or disconnecting battery terminals.

3.3 UPS Batteries

The NX's internal batteries are fully charged before the unit is shipped. During storage and transpor-
tation, some charge is lost. All batteries should be recharged before use. The battery charger works
only when the NX is connected to input power and turned On.

NOTE
Full safety instructions concerning the use and maintenance of UPS batteries are provided in
the appropriate battery manufacturer's manuals, available on the manufacturer's Web site.
The battery safety information contained in this section relates to key considerations that must
be taken into account during the installation design process and might affect the design
outcome, depending on your installation.

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 Battery Installation

3.4 External Battery Cabinet Installation

3.4.1 Matching Battery Cabinets
Two sizes of optional battery cabinets are available. Refer to Figures 13 and 14. The same model bat-
tery cabinet may be installed in parallel in multiple cabinet strings for additional capacity. Battery
run time depends on the cabinet model, the number of cabinets and the load on the UPS.
Handling—The battery cabinet has casters to facilitate movement over short distances. The bottoms
of the battery cabinets are reinforced to permit movement by forklift over longer distances.
Inspection—Remove all panels and visually inspect the batteries, bus connections, and cabinet for
any damage. Exercise caution; voltage is present within the battery cabinet even before installation.
If there are signs of damage, do not proceed. Call Liebert Global Services at 1-800-542-2378.
Storage—The batteries can be stored for up to six months without appreciable deterioration. If plan-
ning to store a battery cabinet for longer than six months or at temperatures higher than 77°F (25°C),
contact Liebert Global Services for recommended precautions.
The following notes, in conjunction with the diagrams (Figure 13 through 12), illustrate the broad
principles to be followed when fitting and connecting the majority of battery cabinet installations.

! CAUTION
Any battery system should be installed by qualified personnel.

When installing an external battery cabinet that is NOT a Liebert NX battery cabinet, the customer
must provide overcurrent protection. See Table 10 for sizing of protection devices.
NOTE
When using an external battery supply that is not provided with the UPS, please make
reference to the battery manufacturer’s installation manual for battery installation and
maintenance instructions, available on the manufacturer’s Web site. When replacing batteries,
Liebert recommends that the batteries in external cabinets be the same type used internally in
the NX. See Table 11 for a list of batteries that are approved for use with this product.

3.4.2 Connecting the Batteries

If the NX battery cabinets are installed on a raised floor, the battery power cables and circuit breaker
control cables may be routed to the UPS cabinet via the floor of the cabinet (bottom entry).
If the NX battery cabinets are installed adjacent to one another on a solid floor, these cables may be
passed between the cabinets through lifting slots in the lower sides of the cabinets.
Intertray connections must be made before the battery cabinet may be used.

Figure 12 Battery cabinet—details

Removable retainer

Tray handle

Insulated post
for cabling

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 Battery Installation

Figure 13 Narrow battery cabinet, 27 in. (690mm) - rear view

Top
cable
entry
BCB plate
and BCB

Battery
trays

Figure 14 Wide battery cabinet, 57 in. (1488mm) - front view

Top cable entry
Batteries

BCB plate and

BCB

Battery tray
support

Service
shelf
Battery tray

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 Battery Installation

3.4.3 Installation Considerations

Position—Liebert battery cabinets come in versions specific to either the left or right side of the
UPS. Control wires and power cables are cut to different lengths for the different versions. If the sys-
tem includes a matching maintenance bypass cabinet (MBC), the MBC should be mounted to the left
of the UPS (nearest the busbars) and the battery cabinet(s) should be installed to the right of the
UPS. Otherwise, left-side placement of the battery cabinet is preferable.
The battery cabinet(s) are designed to be located conveniently next to each UPS module, and are also
available in stand-alone configurations with painted side panels. The front access design eliminates
side and rear service clearance requirements. Refer to Table 33 for battery cabinet dimensions and
weights.
Bolt-On Cabinets—Matching battery cabinets are designed to bolt onto the side of the UPS module
cabinet. Use bolts that ship with each unit to connect cabinet frames at posts, two places in the front
and two places in the rear.
Service Clearance—Allow front access to the battery cabinet at all times for maintenance and ser-
vicing. Electrical codes require that the battery cabinet be installed with no less than 3 feet (1m) of
clearance at the front of the cabinet when operating. Side and rear panels do not require service clear-
ance.
Cables—Cables may be run between the cabinets through cutouts in the top of the cabinet, eliminat-
ing the need for external conduit runs. Route cables before moving cabinets into final position for bolt-
ing together. No top or bottom entry cables are required, except for remotely located cabinets which
require conduits. Refer to Figure 15.
Software—To allow the UPS to accurately display the battery run time, the number of battery cabi-
nets must be noted when performing initial startup and setup using the configuration software. This
is to be performed by the Liebert Global Services customer engineer when commissioning the unit.
Casters and Adjustable Stops—The adjustable stops are not designed to bear the full weight of the
cabinet. Lower the stops until they are finger-tight in contact with the floor. Then tighten a small
amount with a wrench (less than two turns) to give a good friction fit. When mounting the battery
cabinet on seismic stands, ensure that the casters are bearing the weight of the cabinet.
Battery Support Tray—Be sure to connect the battery tray support to the front of the cabinet
before sliding a battery tray out for connection or service. Without the support, the battery tray may
fall out of the cabinet. See Figure 16 for details.

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 Battery Installation

Figure 15 Internal cable wiring from battery cabinet to Liebert NX

Power cables from output power switch

Power cables
from batteries Power cables exit battery
cabinet, enter Liebert NX

Power cables run

across top
of Liebert NX

Power cables
(black) enter RIGHT SIDE CABLE
channel down side ENTRY SHOWN;
of NX to power CUTOUTS ON LEFT
input connections SIDE PERMIT
CONNECTION
FROM THAT SIDE.

Figure 16 Battery tray and supports

Battery tray supports attach

to interior surface of NX
front door (note notched
ends of supports)

Slot in support secured by ... and notched end of support

screw-in connector at slips into slot at top corner
corner of battery tray ... of battery compartment

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 Battery Installation

3.4.4 Connecting the Battery Cabinet to the UPS

After the battery cabinet equipment has been positioned and secured for operation and the batteries
have been connected, connect the power cables as described below. (See Figure 34.)
1. Verify that all incoming high and low voltage power circuits are de-energized and locked out or
tagged out before installing cables or making any electrical connections.
2. Remove the UPS left side panel to gain access to the equipment ground busbar.
3. Remove the external battery terminal block plate on the lower left side of the UPS behind the
front door.
4. Remove the battery cabinet front panel to gain access to the connection bars.
5. Connect the safety ground and any necessary bonding ground cables to the copper ground busbar.
(example: UPS located on the bottom of the equipment below the power connections).
All cabinets in the UPS system must be connected to the user's ground connection.
NOTE
The grounding and neutral bonding arrangement must be in accordance with the National
Electrical Code and all applicable local codes.
6. Connect the system battery cables from the UPS battery terminals (+ N -) to battery cabinet BCB
(+ N -) as shown in Figure 34. Be sure that the battery connections are made with the right
polarity, and tighten the connections to 44 lb-in. (5 N-m) (M6 Bolt). Do not close the battery circuit
breaker before the equipment has been commissioned.
7. Connect supplied auxiliary control cable to pins J10.2 and J10.3 on the U2 monitoring board (see
2.3 - Dry Contacts). Add a jumper wire between J10.3 and J10.4.

3.5 Non-Standard Batteries

When batteries other than a matching battery cabinet are used, a remote battery disconnect switch
with overcurrent protection is required per the National Electrical Code. Contact your local Liebert
sales representative about this option.
Install battery racks, cabinets and batteries in accordance with the manufacturer's instructions.
Verify that the battery area has adequate ventilation and battery operating temperature complies
with the manufacturer's specifications and with all applicable national and local codes.
If you have any questions concerning batteries, battery racks or accessories, contact Liebert Global
Services at 1-800-543-2378.

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 Maintenance Bypass Cabinet

4.0 MAINTENANCE BYPASS CABINET

The Maintenance Bypass Cabinet is designed to operate in UPS mode, bypass mode and maintenance
mode. The mode is selected using the Bypass Switch.

Figure 17 Single UPS with external Maintenance Bypass Cabinet—typical configuration

Input Supply
ABC
N

Sys In CB1

Qin UPS

Input Mains
Supply A B C

CB 1
UPS 1

Rectifier
CB 1
Charger

SW1-C
Rotary
Switch

Static SW
Switch

Fuse

Inverter
SW1-D
Battery 1

Ext Byp SW1-A

N Ext Byp
ABC
Y
QoutUPS

Sys Out CB2

To Load

4.1 Bypass Switch

The Bypass Switch allows easy and rapid transfer of connected loads between the UPS and Bypass
source.

4.2 Normal (UPS) Mode

While the Maintenance Bypass Cabinet rotary switch is in the NORMAL position, the UPS is supply-
ing the connected load with continuous, high-quality AC power. In this mode of operation, the load is
protected by the UPS.

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 Maintenance Bypass Cabinet

4.3 Bypass Mode

When the Maintenance Bypass Cabinet is in the Bypass mode, it provides an alternate path for power
to the connected equipment. Should the UPS need to be taken out of service for limited maintenance
or repair, manual activation of the bypass will cause an immediate transfer of the equipment from the
UPS inverter to the bypass source. In this mode, power will still be supplied to the UPS; however, the
load is NOT protected by the UPS.

4.4 Maintenance Mode

When the maintenance bypass cabinet is in the Maintenance mode, it provides an alternate path for
power to the connected equipment. Should the UPS need to be taken out of service for limited mainte-
nance or repair. In this mode of operation, no power is supplied to the UPS and the load is NOT pro-
tected by the UPS.

4.5 Locating the Cabinet

This Maintenance Bypass Cabinet may be mounted to the left of the UPS or installed as a stand-alone
unit. In either case, ensure that the unit is in a well-ventilated area and that there is clearance for
access to the switches and cable connections as required by national and local codes.

4.6 Cable Installation

4.6.1 Wiring Preparation
Be sure that the unit is not connected to any AC utility power source or UPS before installing any wir-
ing to this unit. This Maintenance Bypass Cabinet should be installed by a qualified / certified electri-
cian.

! WARNING
Please read this section thoroughly before attempting to install wiring to this unit.

Removing the Cover Plates

Plates cover the input and output terminals on the front of the Maintenance Bypass Cabinet (see
Figure 18). Remove these and keep the screws and plates for reinstallation.

Figure 18 Maintenance Bypass Cabinet—access plate removed

Extract screws
from corners to
remove the
access plate

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 Maintenance Bypass Cabinet

4.6.2 Power Cable Installation

Refer to Tables 29, 30 and 32 when selecting cables.

NOTE
Transient and steady state earth leakage currents may occur when starting the equipment.
This should be taken into account when selecting ground current detection devices because
these will carry the earth leakage currents of both the UPS equipment and the load.

4.6.3 Input/Output Wiring

Follow the steps below to connect the input wiring:

NOTE
Input wiring must be installed using conduit if cabinet is not mounted to the immediate left of
the UPS.
1. Locate the input wiring access (top or bottom access), remove the conduit landing plate and punch
the appropriate size hole for the size conduit being used. Pull the three/four input wires through
it, allowing some slack for installation. For cabinets that are located to the immediate left of the
UPS, the access plate is on the lower right of the cabinet. Remove the access plate and verify that
the edge guarding is installed and intact.See Figure 19.

Figure 19 Maintenance Bypass Cabinet wiring access panel

Wiring access is on
lower right side of
Maintenance
Bypass Cabinet

Access panel removed,

wiring connects NX and MBC

Edge Guard

2. Secure the conduit to the access plate of the Maintenance Bypass Cabinet.
3. Input power cables connect to the system input circuit breaker. Refer to Figure 35 -
Maintenance Bypass interconnection
4. Connect the ground (earth) wire to the earth busbar and tighten it to 44 lb-in. (5 N-m) (M6 bolt).
5. Locate UPS input and output cables and access panel to UPS on lower right side. See Figure 19.
NOTE
If the maintenance bypass cabinet is not to be bolted to the UPS, use either top or
bottom access plate.
6. Connect the system ground cable between the Maintenance Bypass Cabinet and UPS and tighten
the connections to 44 lb-in. (5 N-m) (M6 bolt).

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 Maintenance Bypass Cabinet

7. Connect the system input cables between the Maintenance Bypass Cabinet 'UPS Input' Busbars
(A-B-C N terminals) and UPS input busbars (A-B-C N terminals) and tighten the connections to
44 lb-in. (5 N-m) (M6 bolt).
8. Connect the system outnput cables between the Maintenance Bypass Cabinet 'UPS Output'
Busbars (A-B-C N terminals) and UPS output busbars (A-B-C N terminals) and tighten the
connections to 44 lb-in. (5 N-m) (M6 bolt).
9. Connect supplied control wire to X3 on the Parallel (M3) board (see Figure 20).

! WARNING
The control wire must be installed to ensure proper operation of the system and fully protect
the load when switching between bypass cabinet and UPS.

Figure 20 Maintenance bypass control wire location

:X T M IAN T

485+
485-
X2 2 P2
Terminal Block Location

X3
DBS
X2 1 P1

NOTE
For startup procedure, see the UPS operations and maintenance manual, SL-25210.

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 Maintenance Bypass Cabinet

4.7 Bolting Cabinets Together

NOTE
UPS wiring must be completed before the cabinets are bolted together.
1. Line up cabinets so that mounting holes are aligned.

Place cabinets so mounting holes are

aligned.
A bolt from the adjacent cabinet may be
screwed into the threaded top hole, or a
bolt may be inserted through the lower
hole and screwed into the threaded hole
in the adjacent cabinet.
2. Using supplied hardware, bolt the cabinets together. The bolts may be inserted from either the
UPS side or from the MBS side, whichever is more convenient.

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 Options

5.0 OPTIONS

5.1 Load Bus Synchronization

The Load Bus Synchronizer (LBS) keeps the output of two independent UPS systems or parallel UPS
systems in synchronization even when the systems are operating in different modes and even when
either or both systems are operating on batteries. When the LBS is used, one UPS system is desig-
nated as master, the other as slave.
The LBS option is typically used with dual-corded equipment or with either the Liebert SmartSwitch
or Static Transfer Switch (STS) for single-corded equipment.

5.1.1 Performance Requirements

The DBS operates under the following conditions:
• Both master and slave are on inverter
(either system may be on inverter through the rectifier or on inverter through the batteries)
• Master on inverter, and slave on bypass
• Master on bypass, and slave on inverter
• Master and slave on bypass IF the bypass source is the same for both systems

5.1.2 DBS Cable and Settings

For NX-to-NX dual bus configuration, only one optional LBS cable is required, the built-in LBS will
operate normally without extra LBS control box or interface box. The LBS port is X4 on the parallel
board (M3). The parallel board is on the interior of the NX, above and left of the power electronics; see
Figure 30.
An optional, 9-pin LBS cable is used to connect two UPS systems through each system’s DB9 port on
its parallel board. For two parallel systems, the LBS cable can be mounted between any two units
belonging to different parallel systems. For information about the LBS kit or to order the optional
equipment, see your local Liebert representative.
The LBS cable is connected as illustrated in Figure 21.

Figure 21 Load Bus Synchronization cable connection

LBS Cable

Parallel Board Parallel Board

X3
X4 X4
X2-1 X2-2 X2-1 X2-2

The parallel board is on the

interior of the NX, above and
X1-1 X1-2 X1-1 X1-2 left of the power electronics;
see Figure 30

UPS Module or UPS Module or

System #1 System #2

The LBS function is activated with configuration software; when the LBS takes effect, the graphic
LCD will display “LBS active.”

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 Options

5.2 Configuring Parallel System Operation

5.2.1 General
The NX uses intelligent and reliable decentralized technology to achieve parallel operation of two or
more modules of the same rating.
The 1+N system is used to:
• Increase the reliability of the system to ensure adequate power supply to the critical load con-
nected.
• Increase serviceability and allow the execution of maintenance operations and reparations with-
out affecting the ordinary operating conditions of the system (depending on the redundancy level).

5.2.2 Features of Parallel System

• The hardware and firmware for parallel UPS module operation is standard in the NX, and the
configuration can be set up by changing the settings in configuration software.
• It is easy to install the parallel cables in a ring, providing high reliability and redundancy. And
the intelligent paralleling logic provides the user with maximum flexibility. For example, shut-
ting down or starting up the UPS modules in the parallel system can be done in any sequence. If
an overload transfer occurs, the whole system can recover automatically from bypass mode after
the overload is cleared.
• The total load of the parallel system can be queried from each module’s liquid crystal display
screen.

Figure 22 1+N system block diagram

Supplied N N
by Others

Input Mains Input Mains

Supply A B C Supply A B C

UPS 1 CB 1 UPS 2 CB 1
Rectifier Rectifier
SW1-C

SW1-C

Fuse Fuse
Static Static
Switch Switch
Battery 1

Battery 2

Charger Charger
SW1-D

SW1-D

Inverter Inverter

SW1-A SW1-A

ABC ABC

Q1Ext Q2Ext

QUPS Paralleling Cabinet QByp

To Load

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 Appendix

5.2.3 Operating Principles

Redundancy Paralleling
The 1+N parallel redundant system can noticeably improve system reliability. In normal condition,
none of the UPS modules work at full load. That means that even if the load is increased, the system
will not transfer to bypass. And when a UPS module shuts down due to any failure, the remaining
UPS modules can still power and protect the load. When redundancy is lost due to module failure or
load increase, the parallel system will trigger an alarm.

5.2.4 Operation Modes Summary

The parallel system also has operation modes such as normal, battery, bypass and maintenance
bypass. All UPS modules in the 1+N parallel system operate in coordination.
• Normal Mode Operation
The load is powered by the inverters of all the UPS modules in the system. If the frequency of
bypass is within the synchronous range, the inverter will be synchronized with the bypass. Other-
wise, the system will operate at nominal frequency.
• Battery Mode Operation
The batteries of all UPS modules power the load through their inverters. The system operates at
nominal frequency.
• Bypass Mode Operation
The condition to transfer to bypass mode is essentially the same as that of single module system.
The bypass of all the UPS modules powers the load.
• Maintenance Bypass Mode Operation
The sequence to transfer to maintenance bypass mode is the same as for transferring a single-
module system. The maintenance bypass switches should be switched on as synchronously as pos-
sible. Thus the system can be repaired without interrupting the power supply to critical load.

5.3 Installing Parallel System

The basic installation procedure of parallel system is the same as that of single module system. The
following sections introduce only the installation procedures specific to the parallel system.

5.3.1 Conditions for Parallel System

• Each UPS module should have the same rating, the same firmware and hardware version.
• Each UPS module must have the same bypass source.
• The outputs of all UPS modules are connected altogether.
• The main inputs can be from different sources, but the phase rotation sequence of main inputs,
bypass inputs and outputs must be correct and the same.
• The parallel logic cable and load sharing cable must be connected in a ring correctly (see
Figure 23).

5.3.2 Cabinet Installation

Parallel system composed of two or more UPS modules using parallel cabinet
The UPS modules that will form the 1+N system should be placed side-by-side. Each battery cabinet
is placed next to its corresponding UPS module.
The parallel cabinet should be placed in the middle of the system.

5.3.3 Preliminary Checks

Each UPS module should have the same rating, the same firmware and the same hardware version.
Refer to the instructions in 5.3.1 - Conditions for Parallel System.

5.3.4 Protective Devices

For each UPS, refer to Table 10. For each system, refer to Table 31.

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 Appendix

5.3.5 Power Cables

Wiring of power cables is similar to that of single module system (See 2.1 - Power Cabling). The
bypass sources of all modules should be the same, and the outputs should be connected altogether cor-
rectly.
Power cables will be supplied by customer. Power cables to the UPS’s of the 1+N paralleling cabinet
must be routed through either the top or bottom entry access of the UPS.
For systems using a parallel cabinet, see Figures 36 and 38 through 44 for power cable terminations.
NOTE
The length and specifications of power cables including the bypass input cables and UPS
output cables should be the same, thus the load can be shared evenly in bypass mode.

5.3.6 Parallel Control Cables

Parallel System Control Cables
Make the connections listed below on the parallel logic board (M3) inside the NX. (See Figure 30 for
the location of the parallel logic board):
Shielded and double-insulated control cables available in lengths of up to 100 feet (30m) must be
interconnected in a ring configuration between UPS modules as shown below. The ring configuration
ensures high reliability of the control (refer to Figure 23).
See Figure 25 for dry contacts control cable wiring diagram.

Figure 23 Connecting '1+N' system parallel control cables

1 2
UPS 3 4

Parallel Board Parallel Board Parallel Board Parallel Board

X3 P5 X3 P5 X3 P5 X3 P5
X4 X4 X4 X4
X2-2 X2-1 X2-2 X2-1 X2-2 X2-1 X2-2 X2-1

Interconnecting
Cables
P2

P1

P2

P1

P2

P1

P2

P1

X1-1 X1-2 X1-1 X1-2 X1-1 X1-2 X1-1 X1-2

P4

P4

P4

P4
P3

P3

P3

P3

Auxiliary Dry Contact Cables

The external output breaker of each UPS must have Normally Open auxiliary contacts. These con-
tacts must be wired to connector X3 on the Parallel Logic Board (M3). See Figure 24.

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 Appendix

Figure 24 Auxiliary dry contact cables for output breaker in multi-module system

:X T M IAN T

485+
485-
X2 2 P2

X3
DBS
X2 1 P1

! CAUTION
The auxiliary control wire must be installed to ensure proper operation of the system.

NOTE
For startup procedure, see the UPS operations and maintenance manual, SL-25210.

Figure 25 Dry contacts, multiple UPS modules with distribution panel

Input Distribution

UPS 1 UPS 2 UPS N

M3 Board M3 Board M3 Board

X3 X3 X3
Ext. Maint. Ext. Out Ext. Maint. Ext. Out Ext. Maint. Ext. Out

Q1Ext Q2Ext QnExt

QUPS QByp

To Load

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 Options

5.3.7 Emergency Power Off (EPO)

The external emergency stop facility is identical to that described for the single unit installation—
that an individual emergency stop button is provided for each unit.

Figure 26 Connecting EPO push button

UPS2

X2:3
X2:4 Monitor Board

X2:3
Monitor Board
X2:4

UPS1

Normally
Open EPO
UPS2

X2:1
Monitor Board
X2:2

X2:1
Monitor Board
X2:2

UPS1

Normally
Closed EPO

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 Options

5.4 Battery Circuit Breaker Box

The box contains the same battery isolating circuit breaker as mounted in the battery cabinet.
Two battery circuit breaker boxes are available for use in installations where the battery is not
installed in the battery cabinet, in which case the appropriate battery box is fitted as close as possible
to the battery and connected to the UPS equipment as illustrated in Figure 27.
The battery circuit breaker box, is required to protect the battery from overcurrents. It also provides
electrical isolation between the UPS and the battery, permitting technical service personnel to reduce
the risks involved in maintenance work to a minimum.
A separate safety earth must be connected between the UPS unit and circuit breaker box.
Two boxes are available depending on the UPS power rating.
Table 7 Available battery circuit breaker boxes
Dimensions (in)
UPS H-W-D Circuit Breaker
10-15 kVA 32.25x20.25x8.3 70A
20-30 kVA 32.25x20.25x8.3 125A

The circuit breaker has the following features:

• Short-circuit protection.
• Protection against battery cabinet and ups connection errors (polarity reversal +/-).

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 Options

Figure 27 Battery circuit breaker box connections

10.8"
3.9" (274mm)
(98mm)
5.4"
(137mm) Connect to UPS Module
(field-installed)
(3) 1/2" (12.7mm) 4.0"
dia. knockouts (101.2mm)

Midpoint
8.3"

(GND)
for control wiring

J10.2
J10.3

(+)
(211.7mm)

(-)
conduit entry Top View 1
2
20.0" 3
(508mm) 4
2.5" 15.0" 5
6 Midpoint
(63.5mm) (381mm)
TB1 (-) (+) CB
Load
TB1 COM Black Side
N.O. Red Circuit Breaker
N.C. Blue CB
Line
(-) (+) (-) (+)
Side

(+)

(+)
(-)

(-)
32.3" 31.5"
(819.2mm) (800.1mm)

72 Cells 72 Cells

From Customer’s Battery System

Front View (field-supplied and field-installed)

.31" dia. (7.9mm) .38"

(Typ. 4 places) (9.5mm)
.5"
1" 1.93"
(3) 1/2" (12.7mm) (12.7mm) (25.4mm) (49mm)
dia. knockouts
Bottom View for power wiring
conduit entry .46"
(refer to top dimension) (11.8mm)
NOTES: .62"
1. NEMA 1 enclosure provided which is suitable for (15.8mm)
.47"
wall mounting only. Approximate weight is 60 lb.
2. Hardware for connecting cables to the breaker supplied. (11.8mm)
3. Circuit breaker, Cutler-Hammer FD4125ED13D15A02 for 20/30 kVA;
FD4070ED13D15A02 for 10/15 kVA
Midpoint Busbar Detail
4. Color: IBM off-white.
5. Mount enclosure and pull all cables into enclosure before installing dry contacts.
6. Low voltage wiring needs to enter from the top of the enclosure, in separate conduit from power cables.
7. Line side power connections to lugs: (1) # 6AWG per connection for 10 to 15 kVA.
(1) # 2AWG per connection for 20-30 kVA to lugs:. load side power connections to busbars; see detail.
8. Power cables must be sized to limit voltage drop from battery system to UPS to be a maximum 4 VDC. DPN U3813078 Rev. N

NOTE
1. The signal cables in this figure must be shielded and double-insulated.
2. Connect the Pes (Protection Earth) of the UPS cabinet and BCB box to the same point.

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 UPS Specifications

6.0 UPS SPECIFICATIONS

These specifications describe requirements for the Liebert NX UPS.

6.1 Conformity and Standards

The UPS has been designed to conform to the following standards:
• IEEC1000-4-5
• ASME
• CSA 22.2, No. 107.1
• FCC Part 15, Class A
• ISO 9001
• National Electrical Code (NFPA-70)
• NEMA PE-1
• OSHA
• UL Standard 1778
The UPS system has UL and c-UL approval.

6.2 UPS Environmental

The UPS is designed to operate under the following environmental conditions without damage or deg-
radation in electrical operating characteristics:
Table 8 Environmental characteristics
Rated Power 10-30kVA
Operating Temperature, UPS 32°F to 104°F (0°C to 40°C)
Optimal Operating Temperature, Battery 68°F to 86°F (20°C to 30°C)
Relative Humidity 0 to 95%, non-condensing
Acoustical Noise, dBA at 39 in. (1m) 54
Altitude of Operation ≤1000m per IEC 62040/3
Storage-Transport Temperature, UPS -4°F to 158°F (-20°C to 70°C)
Storage-Transport Temperature, Battery -4°F to 86°F (-20°C to 30°C)

6.3 UPS Mechanical Characteristics

Table 9 Mechanical characteristics
Parameter 10kVA 15kVA 20kVA 30kVA
Width, in. (mm) 24 (600)
Depth, in. (mm) 32.5 (825)
Height, in. (mm) 63 (1600)
Weight Without Inner Batteries, lb. (kg) 450 (205) 450 (205) 550 (250) 550 (250)
UPS12-100 weight 954 (433) 954 (433) 1054 (478) 1054 (478)
UPS12-140 weight 1098 (498) 1098 (498) 1198 (543) 1198 (543)
Heat Dissipation, BTU/H (kWH) 2800 (0.82) 4200 (1.23) 5500 (1.61) 8300 (2.43)
3/h)
Airflow, CFM (m 384 (652) 558 (948) 522 (886) 834 (1417)
Cable Entry Bottom or top
Color PMS 877
Protection Grade (with open/closed front doors) IP 20

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 UPS Specifications

6.4 UPS Electrical Characteristics

Table 10 UPS terminal
Input (for single-input unit)
Maximum Recommended Lug
Nominal Maximum OCP
Unit Input Input OCP Device Lug T&B Lug T&B
Rating Current Current Current Rating Bolt Size One Hole 54000 One Hole REDDY
10 28 35 42 45 6M (1/4”) 54105 62204
15 42 53 63 70 6M (1/4”) 54106 62204
20 56 70 84 90 6M (1/4”) 54107 62204
30 83 104 125 125 6M (1/4”) 54152 62205

Rectifier input (for dual input unit only)

Maximum Recommended Lug
Nominal Maximum OCP
Unit Input Input OCP Device Lug T&B Lug T&B
Rating Current Current Current Rating Bolt Size One Hole 54000 One Hole REDDY
10 25 31 37 40 6M (1/4”) 54130 62204
15 37 47 57 60 6M (1/4”) 54106 62204
20 50 63 76 80 6M (1/4”) 54107 62204
30 75 94 113 125 6M (1/4”) 54152 62205

Bypass input (for dual input units)

Maximum Recommended Lug
Nominal OCP Lug T&B Lug T&B
Unit Input OCP Device One Hole One Hole
Rating Current Current Rating Bolt Size 54000 REDDY
10 28 35 35 6M (1/4”) 54105 62204
15 42 53 60 6M (1/4”) 54106 62204
20 56 70 70 6M (1/4”) 54107 62204
30 83 104 110 6M (1/4”) 54152 62205

Output
Maximum Recommended Lug
Nominal OCP
Unit Output OCP Device Lug T&B Lug T&B
Rating Current Current Rating Bolt Size One Hole 54000 One Hole REDDY
10 28 35 35 6M (1/4”) 54130 62204
15 42 53 60 6M (1/4”) 54106 62204
20 56 70 70 6M (1/4”) 54106 62204
30 84 105 110 6M (1/4”) 54108 62205

Battery
Maximum Recommended Lug
OCP
Unit Battery OCP Device Lug T&B Lug T&B
Rating Current Current Rating Bolt Size One Hole 54000 One Hole REDDY
10/15 55 55 70 6M (1/4”) 54106 62204
20/30 110 110 125 8M (5/16”) 54153 62212

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 UPS Specifications

6.4.1 Battery Manufacturers and Models

Either of two manufacturers’ batteries will be installed in the NX 10-30 kVA 208V as shipped. Below
are the battery makers and the models they supply.
Table 11 Approved batteries
Battery Manufacturer Models Supplied
Enersys Yuasa NPX-80FR NPX-100FR NPX-150FR
C&D Dynasty UPS12-100MR UPS12-140MR -

6.4.2 Input Rectifier

Table 12 Rectifier input power
Rated Power 10kVA 15kVA 20kVA 30kVA
Rated Voltage, VAC 120/208
Supply 3-phase, 4-wire plus ground
Input Voltage Tolerance, VAC (without derating) 166-239
Frequency, Hz 50 / 60
Input Frequency Tolerance % ±10
≤ 0.99 at full load
Power Factor
≤ 0.95 at 50% load
Harmonic Current Less than 4% at full rated UPS output load
Input Current,1 Nominal, A 28 42 56 83
Output Current, Nominal, A 28 42 56 83
Notes:
1. Overload capacity of input current: 100% Imax <I<125% Imax: 10 min.
125% Imax <I<150% Imax: 1 min.
I>150%: Limits input current immediately

6.4.3 DC Intermediate Circuit

Table 13 DC intermediate circuit
Rated Power 10kVA 15kVA 20kVA 30kVA
Number of batteries is 24 jars (12V per jar), or 144 cells (2V per
Recommended number of lead-acid batteries cell) for VRLA. The unit is shipped with a nominal voltage of
288VDC.
Recommended float charge voltage 2.27VDC*
Recommended boost charge voltage 2.3VDC*
Recommended end of discharge voltage 1.65-1.8 VDC
Maximum recharge battery current, A 7.5 7.5 15 15
Maximum boost charge duration, min.* 1440
Boost-float threshold current, A* 0.1 C default
Temperature voltage compensation, mV/°C* 3
Ripple voltage superimposed % ≤1
* Set by configuration software and based on usage of VLRA batteries.

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 UPS Specifications

6.4.4 Inverter Output

Table 14 Inverter output
Rated Power 10kVA 15kVA 20kVA 30kVA
Rated voltage, VAC 120/208
Supply 3-phase, 4-wire plus ground
Frequency, Hz 50 / 60
Rated Power, kW 8 12 16 24
Three -phase transient overload, 10 minutes - 105-125% load
min. load 1 minute - 126-150% load
Voltage Regulation % ±1.0% three-phase RMS average for a balanced three-phase load
±2.0% three-phase RMS average for a 100% unbalanced load
Frequency Regulation % Nominal frequency regulation is ±0.05% in single module mode,
and+/- 0.25% in parallel mode.
Maximum rate of change of For single mode, the slew rate is adjustable from 0.1Hz/s to 3Hz/s
frequency, Hz/sec
Current rating of neutral cable, A 1.5 x input current

6.4.5 Bypass Input

Table 15 Bypass input
Rated Power 10kVA 15kVA 20kVA 30kVA
Rated voltage, VAC 120/208
Supply Three-phase, 4-wire plus ground
Rated Current, A
208VAC 28 42 56 83
Upper limit: +10%, +15% or +20% Upper limit default: +15%
Bypass voltage tolerance %
Lower limit: -10%, -20%, -30% or -40% Lower limit default: -20%
Frequency, Hz 50 / 60
Input frequency tolerance % ± 10 or ± 20%; default ±10%
Current rating of neutral cable, A 1.5 x input current
Time Load
Bypass overload capacity Long-term operation: <135% load
(all ratings) 10 minutes: 135% - 170% load
100milliseconds: 1000% full UPS rated output current

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 Installation Drawings

7.0 INSTALLATION DRAWINGS

The diagrams in this section illustrate the key mechanical and electrical characteristics of the NX
UPS System cabinets.
Figure 28 Dimensional view- front and left side views
600 825

10mm dia. threaded

Monitoring mounting holes
Panel

Leveler
1600

Detail “A” Rear of unit

shown without side panel

Air intake area.

Do not block
air filter.

90
Adjustable Stops
FRONT VIEW LEFT SIDE VIEW
(see Note 11)
1. All dimensions are in millimeters.
2. A minimum of 24 inches clearance above the unit is required for air exhaust.
3. Installation and service access required. Left-side access recommended for maximum ease of
installation.
4. Keep cabinet within 15 degrees of vertical while handling.
5. Top and bottom cable entry available through removal access plates. Remove punch to suit conduit size
and replace.
6. Unit bottom is structurally adequate for forklift handling.
7. Open door to replace air filter, washable type, size 354x314.
8. Threaded mounting holes used for seismic anchoring or floor stand. Note: If a floor stand is used, the
weight of the unit must be supported under all casters.
9. Each mounting location is supported by two 10 GA. (.135”) galvanized steel. The threaded 12mm insert
is approximately 3/4” deep. Mounting bolts must be threaded into unit.
10. Includes side panel. Refer to Detail A for dimension to frame with side panel removed. Side panels are
removed between adjacent units that are bolted together.
11. Adjustable stops are not designed to carry the full weight of the cabinet. Finger-tighten stop against the
floor, then tighten with a wrench less than two turns for friction against the floor.

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 Installation Drawings

Figure 29 Dimensions continued—top and bottom views

10mm dia. threaded
mounting holes 4 (typ).
See Notes 8 and 9 above.

Rear stabiliz-
ing foot

Air

Air Exhaust

Power Cable
Entry Area
Top and
Bottom

TOP VIEW BOTTOM VIEW

Figure 30 Main components—typical unit

Parallel Board (M3)

Monitor
Board
(U2)

IntelliSlot Power
Communication Electronics
Ports

Input
Breaker

Rotary
System Battery
Switch Trays
Input Breaker
Access Plate

Internal and
External Battery
Terminal Block
Access Plate Front View
DPN U3812048
(with door open) Rev. 1

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 Installation Drawings

Figure 31 Cable connections

AC output cable
connections

Bypass AC input cable

connections

Input Neutral Bus

(side view)

Input/Output Output Neutral Bus

Neutral (side view)

Earth Power Earth

(side view)

Battery connections (+ N -)
4.1 to battery
4.2 to external battery cabinet

NOTES
1. All dimensions are millimeters.
2. Top and bottom cable entry available through removable access plates. Remove, punch to
accommodate conduit size and replace.
3. Control wiring and power wiring must be run in separate conduit. Output and input cables must be
run in separate conduit.
4. Aluminum and copper-clad aluminum cables are not recommended,
5. All wiring is to be in accordance with national and local electrical codes.

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 Installation Drawings

Figure 32 Location of internal batteries

Battery
186mm

417mm

687mm

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 Installation Drawings

Figure 33 Battery connections

DYNASTY BATTERY

TOP LAYER MIDDLE LAYER

W501 3pcs

W506 to W507
+ - + - + - + -

W500 18pcs

+ - + - + - + -

+ - + - + - + -

+ - + - + - + -

W510 to W511 W502 to W503 W503 to W502 W504 to W505

W511 to W510
BOTTOM LAYER

W507 to W506

W509 to W508 + - + -

+ - + -

+ - + -
+ N -
CON4

+ - + -

W505 to W504 W508 to W509

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 Installation Drawings

Figure 34 Battery cabinet interconnection

Refer to Table 16 for key to interconnection

Midpoint (N)
Negative (-)
Positive (+)
Positive (+)
Midpoint (N)
Negative (-)

Breaker
Connection Detail Breaker
Detail Detail

A A
B B

OR

UPS Module 27" Battery Cabinet 59" Battery Cabinet

Front View Front View Front View
with doors removed without doors and without doors and
protective plates protective plates

NOTES:
1. All Liebert-supplied cable must be repositioned prior to and while the cabinets are being placed in
their final installed location.
2. All interconnection hardware supplied by Liebert
3. All interconnection cables supplied by Liebert when bolted together.
4. Interconnection cables field-supplied when battery cabinets are stand-alone.
5. Refer to the individual drawing of each piece of equipment for additional details.

Table 16 Liebert -supplied interconnect wiring

Run From To Conductors
A UPS battery terminal block External 27" or 59" battery cabinet Positive, midpoint, negative
B Battery cabinet terminal block UPS monitor board Battery breaker aux contacts

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 Installation Drawings

Figure 35 Maintenance Bypass interconnection

Refer to Table 17 for key to interconnection

Maintenance Bypass/Transformer Cabinet UPS Module

front view without front door and panel left-side view without side panel
NOTES
1. All Liebert-supplied cable must be repositioned prior to and while the cabinets are being placed in their
final installed location.
2. All interconnection hardware supplied by Liebert.
3. AC connections must be made to the UPS module before attaching maintenance bypass/transformer
cabinet to UPS module.
4. Utility AC source neutral not required for maintenance bypass/transformer cabinet types D, E, M, N.
5. All cabling will be field-supplied when maintenance bypass/transformer cabinet is configured as stand-
alone cabinet.
6. Maintenance bypass/transformer cabinets must attach to the left side only.
7. Refer to the individual drawing of each piece of equipment for additional details.

Table 17 Liebert-supplied interconnect wiring for Maintenance Bypass Cabinet

Run From To Conductors
A Utility AC source Maintenance Ph A, B, C bypass/ transformer cabinet
B Utility AC source Maintenance Neutral bypass/ transformer cabinet
C Maintenance UPS module AC input Neutral - UPS Input
D Maintenance UPS module AC input Ph A, B, C - UPS Input
E UPS module AC output Maintenance Ph A, B, C - UPS Output
F UPS module AC output Maintenance Neutral - UPS Output
G Maintenance Load AC connection Neutral bypass cabinet
H Maintenance Load AC connection Ph A, B, C bypass cabinet
I Utility AC source All ground connections Ground
J Monitoring terminal block UPS Parallel Logic Board (M3) Bypass contacts

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 Installation Drawings

Figure 36 NX 1+1 parallel cabinet interconnections

1+1 Parallel Cabinet

(Front View Without Front Door and Panel)

J J J

D1 D1 K1 H
E1,E2
D2 H D2 H K2
B
F1,F2 B
C F1, F2 I F1,F2 I D1
K1,K2 G G D2
G
D1,D2 I
A F1,F2
I E1,E2

UPS Module Left Side View Type A00 Type BR0 Type DR1 & CR1
(Without Side Panel)

NOTES:
1. All Liebert-supplied cable will need to be repositioned prior to and while setting the cabinets in their
installed location.
2. All interconnection cable and hardware supplied by others.
3. AC connections must be made to the UPS modules before attaching paralleling cabinet to UPS modules.
4. Utility AC source neutral not required for maintenance bypass/transformer cabinet type CR1.
5. Paralleling cabinets must between both UPS modules.
6. Refer to the individual drawing of each piece of equipment for additional details

Table 18 Liebert-supplied interconnect wiring

Run From To Conductors Cabinet Type
A Utility AC Source Paralleling Cabinet PH A, B, C - Bypass BR0, CR1, DR1
B Utility AC Source Paralleling Cabinet Neutral - Bypass BR0, CR1, DR1
C Utility AC Source UPS Module AC Input PH A,B,C - UPS A00, BR0
D1 UPS #1 Module AC Output Paralleling Cabinet PH A, B, C - UPS A00, BR0, CR1, DR1
D2 UPS #2 Module AC Output Paralleling Cabinet PH A, B, C - UPS A00, BR0, CR1, DR1
E Utility AC Source UPS #1 Module AC Input Neutral - UPS Input A00, BR0, CR1, DR1
E2 Utility AC Source UPS #1 Module AC Input Neutral - UPS Input A00, BR0, CR1, DR1
F1 Paralleling Cabinet UPS #1 Module AC Output Neutral - UPS Output A00, BR0, CR1, DR1
F2 Paralleling Cabinet UPS #1 Module AC Output Neutral - UPS Output A00, BR0, CR1, DR1
G Paralleling Cabinet Load AC Connection Neutral - Load A00, BR0, CR1, DR1
H Paralleling Cabinet Load AC Connection PH A, B, C - Load A00, BR0, CR1, DR1
I Utility AC Source All Ground Connections Ground A00, BR0, CR1, DR1
J Monitoring Terminal Block UPS Parallel Logic Board (M3) Auxiliary Contacts A00, BR0, CR1, DR1
K1 UPS #1 Module AC Input Paralleling Cabinet PH A, B, C - UPS CR1, DR1
K2 UPS #1 Module AC INPUT Paralleling Cabinet PH A, B, C - UPS CR1, DR1

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 Installation Drawings

Figure 37 Lineup detail—SlimLine distribution cabinet to NX

E H
H A
G C
B

D
D

E
H

NOTES:
1. All Liebert-supplied cable will need to be repositioned prior to and while setting the cabinets in their
installed location.
2. All interconnection cables and hardware supplied by Liebert.
3. AC connections must be made to the UPS module before attaching.
4. See Figure 45 for placement of distribution cabinet.
5. Refer to the individual drawing of each piece of equipment for additional details.

Table 19 Liebert-supplied interconnect wiring—SlimLine distribution cabinet to NX

Run From To Conductors
A Distribution Cabinet Load AC Connection Isolated Ground
Neutral
B Distribution Cabinet Load AC Connection
Distribution Cabinet
Ground
C Distribution Cabinet Load AC Connection
Distribution Cabinet
D Distribution Cabinet Load AC Connection PH A,B,C
E UPS Module AC Output Distribution Cabinet PH A, B, C
G UPS Module AC Output Distribution Cabinet Neutral
H UPS Module AC Output All Ground Connections Ground

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 Installation Drawings

Figure 38 Lineup detail—1+N Type A connection to NX

1 + N Parallel Cabinet
(front view without front door and panel)
1. All Liebert-supplied cable must be repositioned prior to and while setting the cabinets in their installed
location.
2. All interconnection cables and hardware supplied by others.
3. AC connections must be made to the UPS modules before attaching paralleling cabinet to UPS modules
4. The interconnecting output cables between the paralleling cabinet and the UPSes must be the same size
and the same length.
5. The location of the system output neutral busbar (connection K) and the ground busbar (connections H, I
and J) are shown for a left-access style. For right-access version, these busbars are at opposite locations
6. Refer to the individual drawing of each piece of equipment for additional details.

Table 20 Interconnect wiring—1+N Type A connection to NX

RUN FROM TO CONDUCTORS
A1-A4 Utility AC Source UPS #1-UPS #4 Module AC Input Ph A, B, C - UPS Input
B1-B4 Utility AC Source UPS #1-UPS #4 Module AC Input Neutral - UPS Input
C1-C4 UPS #1-UPS #4 Module AC Output Paralleling Cabinet Ph A, B, C- UPS Output
D1-D4 UPS #1-UPS #4 Module AC Output Paralleling Cabinet Neutral - UPS Output
E1-E4 Paralleling Cabinet UPS #1-UPS #4 Module AC Ground Ground-UPS
F Paralleling Cabinet Load AC Connection Ph A, B, C - Load
G Paralleling Cabinet Load AC Connection Ground-Load
H Paralleling Cabinet Load AC Connection Neutral-Load
I1-I4 UPS #1-UPS #4 Module Output Breaker Aux Contact
Paralleling Cabinet
Parallel Logic Board (M3)

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 Installation Drawings

Figure 39 Lineup detail—1+N Type A1 connection to NX

1 + N Parallel Cabinet 1 + N Cabinet Interior View

(front view without front door and panel) (neutral and ground busbar location)

1. All Liebert-supplied cable must be repositioned prior to and while

setting the cabinets in their installed location.
2. All interconnection cables and hardware supplied by others.
3. AC connections must be made to the UPS modules before attaching
paralleling cabinet to UPS modules.
4. The interconnecting input cables between the paralleling cabinet
and the UPSes must be the same size and the same length.
5. The interconnecting output cables between the paralleling cabinet
and the UPSes must be the same size and the same length.
6. The location of the system output neutral busbar (connection K)
and the ground busbar (connections H, I and J) are shown for a
left-access style. For right-access version, these busbars are at
opposite locations.
7. Refer to the individual drawing of each piece of equipment for
additional details.
UPS Module Left Side View
(without side panel)
Table 21 Interconnect wiring—1+N Type A1 connection to NX
Run From To Conductors
A Utility AC Source Paralleling Cabinet Ph A, B, C - System Input
B Utility AC Source Paralleling Cabinet Ground - System Input
C Utility AC Source Paralleling Cabinet Neutral - System Input
D1-D4 Paralleling Cabinet UPS #1-UPS #4 Module AC Ground Ph A, B, C- UPS Input
E1-E4 Paralleling Cabinet UPS #1-UPS #4 Module AC Ground Neutral - UPS Input
F1-F4 UPS #1-UPS #4 Module AC Output Paralleling Cabinet Ph A, B, C - UPS Output
G1-G4 UPS #1-UPS #4 Module AC Output Paralleling Cabinet Neutral - UPS Output
H1-H4 Paralleling Cabinet UPS #1-UPS #4 Module AC Ground Ground - UPS
I Paralleling Cabinet Load AC Connection Ph A, B, C - Load
J Paralleling Cabinet Load AC Connection Ground - Load
K Paralleling Cabinet Load AC Connection Neutral - Load
L1-L4 UPS #1-UPS #4 Module Output Breaker Aux Contact
Paralleling Cabinet
UPS Parallel Logic Board (M3)

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 Installation Drawings

Figure 40 Lineup detail—1+N Type B connection to NX

I1, I2

1 + N Parallel Cabinet 1 + N Cabinet Interior View

(front view without front door and panel) (neutral and ground busbar location)

1. All Liebert-supplied cable must be repositioned prior to and

while setting the cabinets in their installed location.
2. All interconnection cables and hardware supplied by others.
3. AC connections must be made to the UPS modules before
attaching paralleling cabinet to UPS modules.
4. The interconnecting output cables between the paralleling
cabinet and the UPSes must be the same size and the same
length.
5. The location of the system output neutral busbar (connection
K) and the ground busbar (connections H, I and J) are shown
for a left-access style. For right-access version, these busbars
are at opposite locations.
6. Refer to the individual drawing of each piece of equipment for
additional details.
UPS Module Left Side View
(without side panel)

Table 22 Interconnect wiring—1+N Type B connection to NX

Run From To Conductors
A1-A4 Utility AC Source UPS #1-UPS #4 Module AC Input Ph A, B, C - UPS Input
B1-B4 Utility AC Source UPS #1-UPS #4 Module AC Input Neutral - UPS Input
C1-C4 UPS #1-UPS #4 Module AC Output Paralleling Cabinet Ph A, B, C - UPS Output
D1-D4 UPS #1-UPS #4 Module AC Output Paralleling Cabinet Neutral - UPS Output
E1-E4 Paralleling Cabinet UPS #1-UPS #4 Module AC Ground Ground-UPS
F Paralleling Cabinet Load AC Connection Ph A, B, C - Load
G Paralleling Cabinet Load AC Connection Ground-load
H Paralleling Cabinet Load AC Connection Neutral-load
I1-I4 UPS #1-UPS #4 Module Output Breaker Aux Contact
Paralleling Cabinet
UPS Parallel Logic Board (M3)

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 Installation Drawings

Figure 41 Lineup detail—1+N Type B1 connection to NX

1 + N Cabinet Side View 1 + N Parallel Cabinet 1 + N Cabinet Interior View

(without side panel or door) (front view without front door and panel) (neutral and ground busbar location)

1. All Liebert-supplied cable must be repositioned prior to and while

setting the cabinets in their installed location.
2. All interconnection cables and hardware supplied by others.
3. AC connections must be made to the UPS modules before attaching
paralleling cabinet to UPS modules.
4. The interconnecting input cables between the paralleling cabinet and
the UPSes must be the same size and the same length.
5. The interconnecting output cables between the paralleling cabinet and
the UPSes must be the same size and the same length.
6. The location of the system output neutral busbar (connection K) and
the ground busbar (connections H, I and J) are shown for a left-access
style. For right-access version, these busbars are at opposite locations.
7. Refer to the individual drawing of each piece of equipment for
UPS Module Left Side View additional details.
(without side panel)

Table 23 Interconnect wiring—1+N Type B1 connection to NX

Run From To Conductors
A Utility AC Source Paralleling Cabinet Ph A, B, C - System Input
B Utility AC Source Paralleling Cabinet Ground - System Input
C Utility AC Source Paralleling Cabinet Neutral -system Input
D1-D4 Paralleling Cabinet UPS #1-UPS #4 Module AC Input Ph A, B, C - UPS Input
E1-E4 Paralleling Cabinet UPS #1-UPS #4 Module AC Input Neutral - UPS Input
F1-F4 UPS #1-UPS #4 Module AC Output Paralleling Cabinet Ph A, B, C - UPS Output
G1-G4 UPS #1-UPS #4 Module AC Output Paralleling Cabinet Neutral - UPS Output
H1-H4 Paralleling Cabinet UPS #1-UPS #4 Module AC Ground Ground-UPS
I Paralleling Cabinet Load AC Connection Ph A, B, C - Load
J Paralleling Cabinet Load AC Connection Ground-load
K Paralleling Cabinet Load AC Connection Neutral-Load
L1-L4 UPS #1-UPS #4 Module Output Breaker Aux Contact
Paralleling Cabinet
UPS Parallel Logic Board (M3)
M1-M4 UPS #1-UPS #4 Module Rotary Switch Aux Contact
Paralleling Cabinet
UPS Parallel Logic Board (M3)

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 Installation Drawings

Figure 42 Lineup detail—1+N Type C connection to NX

1 + N Cabinet Side View 1 + N Parallel Cabinet 1 + N Cabinet Interior View

(without side panel or door) (front view without front door and panel) (neutral and ground busbar location)
1. All Liebert-supplied cable must be repositioned prior to and while
setting the cabinets in their installed location.
2. All interconnection cables and hardware supplied by others.
3. AC connections must be made to the UPS modules before attaching
paralleling cabinet to UPS modules.
4. Utility AC source neutral not required for maintenance bypass/
transformer cabinet Type C.
5. The interconnecting input cables between the paralleling cabinet and
the UPSes must be the same size and the same length.
6. The interconnecting output cables between the paralleling cabinet
and the UPSes must be the same size and the same length.
7. The location of the system output neutral busbar (connection K) and
the ground busbar (connections H, I and J) are shown for a left-access
style. For right-access version, these busbars are at opposite locations.
UPS Module Left Side View 8. Refer to the individual drawing of each piece of equipment for
(without side panel) additional details.
Table 24 Interconnect wiring—1+N Type C connection to NX
Run From To Conductors
A Utility AC Source Paralleling Cabinet Ph A, B, C-system Input
B Utility AC Source Paralleling Cabinet Ground - System Input
C1-C4 Paralleling Cabinet UPS #1-UPS #4 Module AC Input Ph A ,B, C - UPS Input
D1-d4 Paralleling Cabinet UPS #1-UPS #4 Module AC Input Neutral - UPS Input
E1-E4 UPS #1-UPS #4 Module AC Output Paralleling Cabinet Ph A, B, C - UPS Output
G1-G4 UPS #1-UPS #4 Module AC Output Paralleling Cabinet Neutral - UPS Output
H1-H4 Paralleling Cabinet UPS #1-UPS #4 Module AC Ground Ground - UPS
I Paralleling Cabinet Load AC Connection Ph A ,B, C - Load
J Paralleling Cabinet Load AC Connection Ground - Load
K Paralleling Cabinet Load AC Connection Neutral - Load
L1-l4 UPS #1-UPS #4 Module Output Breaker Aux Contact
Paralleling Cabinet
UPS Parallel Logic Board (M3)
M1-M4 UPS #1-UPS #4 Module Rotary Switch Aux Contact
Paralleling Cabinet
UPS Parallel Logic Board (M3)

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 Installation Drawings

Figure 43 Lineup detail—1+N Type C1 connection to NX

1 + N Cabinet Side View 1 + N Parallel Cabinet 1 + N Cabinet Interior View

(without side panel or door) (front view without front door and panel) (neutral and ground busbar location)

1. All Liebert-supplied cable must be repositioned prior to and while setting

the cabinets in their installed location.
2. All interconnection cables and hardware supplied by others.
3. AC connections must be made to the UPS modules before attaching
paralleling cabinet to UPS modules.
4. The interconnecting input cables between the paralleling cabinet and the
UPSes must be the same size and the same length.
5. The interconnecting output cables between the paralleling cabinet and the
UPSes must be the same size and the same length.
6. The location of the system output neutral busbar (connection K) and the
ground busbar (connections H, I and J) are shown for a left-access style.
For right-access version, these busbars are at opposite locations.
7. Refer to the individual drawing of each piece of equipment for additional
UPS Module Left Side View
details.
(without side panel)

Table 25 Interconnect wiring—1+N Type C1 connection to NX

Run From To Conductors
A Utility AC Source Paralleling Cabinet Ph A, B, C - System Input
B Utility AC Source Paralleling Cabinet Ground - System Input
C Utility AC Source Paralleling Cabinet Neutral -System Input
D1-D4 Paralleling Cabinet UPS #1-UPS #4 Module AC Input Ph A, B, C - UPS Input
E1-E4 Paralleling Cabinet UPS #1-UPS #4 Module AC Input Neutral - UPS Input
F1-F4 UPS #1-UPS #4 Module AC Output Paralleling Cabinet Ph A, B, C - UPS Output
G1-G4 UPS #1-UPS #4 Module AC Output Paralleling Cabinet Neutral - UPS Output
H1-H4 Paralleling Cabinet UPS #1-UPS #4 Module AC Ground Ground-UPS
I Paralleling Cabinet Load AC Connection Ph A, B, C - Load
J Paralleling Cabinet Load AC Connection Ground-Load
K Paralleling Cabinet Load AC Connection Neutral- Load
L1-L4 Paralleling Cabinet UPS #1-UPS #4 Module Output Breaker Aux Contact
UPS Parallel Logic Board (M3)

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 Installation Drawings

Figure 44 Lineup detail—1+N Type D connection to NX

1 + N Cabinet Side View 1 + N Parallel Cabinet 1 + N Cabinet Interior View

(without side panel or door) (front view without front door and panel) (neutral and ground busbar location)

1. All Liebert-supplied cable must be repositioned prior to and while

setting the cabinets in their installed location.
2. All interconnection cables and hardware supplied by others.
3. AC connections must be made to the UPS modules before attaching
paralleling cabinet to the UPS modules.
4. The interconnecting input cables between the paralleling cabinet and
the UPSes must be the same size and the same length.
5. The interconnecting output cables between the paralleling cabinet and
the UPSes must be the same size and the same length
6. The location of the system output neutral busbar (connection K) and the
ground busbar (connections H, I and J) are shown for a left-access style.
For right-access version, these busbars are at opposite locations.
7. Refer to the individual drawing of each piece of equipment for additional
UPS Module Left Side View details.
(without side panel)

Table 26 Interconnect wiring—1+N Type D connection to NX

Run From To Conductors
A Utility AC Source Paralleling Cabinet Ph A, B, C - System Input
B Utility AC Source Paralleling Cabinet Ground - System Input
C Utility AC Source Paralleling Cabinet Neutral - System Input
D1-D4 Paralleling Cabinet UPS #1-UPS #4 Module AC Input Ph A, B, C - UPS Input
E1-E4 Paralleling Cabinet UPS #1-UPS #4 Module AC Input Neutral - UPS Input
F1-F4 UPS #1-UPS #4 Module AC Output Paralleling Cabinet Ph A, B, C - UPS Output
G1-G4 UPS #1-UPS #4 Module AC Output Paralleling Cabinet Neutral - UPS Output
H1-H4 Paralleling Cabinet UPS #1-UPS #4 Module AC Ground Ground - UPS
I Paralleling Cabinet Load AC Connection Ph A, B, C - Load
J Paralleling Cabinet Load AC Connection Ground - Load
K Paralleling Cabinet Load AC Connection Neutral -L oad
L1-L4 Paralleling Cabinet UPS #1-UPS #4 Module Output Breaker Aux Contact
UPS Parallel Logic Board (M3)
M1-M4 Paralleling Cabinet UPS #1-UPS #4 Module Rotary Switch Aux Contact
UPS Parallel Logic Board (M3)

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 Installation Drawings

Figure 45 SlimLine locations

SlimLine

SlimLine
UPS UPS Battery

SlimLine
MBC UPS
SlimLine

MBC UPS Battery

SlimLine

SlimLine

SlimLine

1+N 1+N
UPS Paralleling Paralleling
Cabinet Cabinet

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 Specifications and Technical Data

8.0 SPECIFICATIONS AND TECHNICAL DATA

8.1 Lug Size and Torque Requirements

Use commercially available solderless lugs for the wire size required for your application. Refer to
Table 27. Connect wire to the lug using tools and procedures specified by the lug manufacturer.
Table 27 Torque specifications
Nut and Bolt CombinationS
Electrical Connections
Grade 2 Standard with Belleville Washers
Bolt Shaft Size Lb-in N-m Lb-in N-m
1/4 53 6.0 46 5.2
5/16 107 12 60 6.8
3/8 192 22 95 11
1/2 428 22 256 29
Circuit Breakers With Compression Lugs (For Power Wiring)
Wire Size or Range Lb-in N-m
#6 - #4 100 11
#3 - #1 125 14
1/0 - 2/0 150 17
3/0 - 200 MCM 200 23
250 - 400 MCM 250 28
500 - 700 MCM 300 34
Circuit Breakers With Compression Lugs (For Power Wiring)
Current Rating Lb-in N-m
400 - 1200 Amps 300.00 34.00
Terminal Block Compression Lugs (For Control Wiring)
AWG Wire Size or Range Lb-in N-m
#22 -#14 3.5 to 5.3 0.4 to 0.6
NOTE: Use the values in this table unless the equipment is labeled with a different torque value.

Table 28 Battery torque rating

Initial Torque Annual Torque
Battery in-lb (N-m) in-lb (N-m)
UPS12-100MR 40 (4.5) 32 (3.48)
UPS12-140MR 40 (4.5) 32 (3.48)
UPS12-200MR 40 (4.5) 32 (3.48)
UPS12-270MR 40 (4.5) 32 (3.48)
UPS12-310MR 65 (7.4) 52 (5.88)
UPS12-370MR 65 (7.4) 52 (5.88)
UPS12-475MR 110 (12.4) 110 (12.4)

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 Specifications and Technical Data

Table 29 Maintenance bypass cabinet electrical data (single input)

Maintenance
Bypass Bypass Cabinet Cabinet
I/P Voltage Max Input Input OCP O/P Voltage Nominal O/P Output
kVA Type (VAC) Current CB Size (A) (VAC) Current Rating (A) OCP CB Size (A)
30 A, J 208 104 125 208 83 125
30 B, K 480 47 60 208 83 125
30 B, K 600 37 50 208 83 125
30 B, K 220 101 125 208 83 125
30 C, L 480 48 60 480 36 50
30 C, L 600 38 50 600 29 40
30 C, L 220 105 125 220 79 100
30 D, M 480 47 60 208 83 125
30 D, M 600 38 50 208 83 125
30 D, M 208 108 150 208 83 125
30 D, M 220 103 125 208 83 125
30 D, M 240 93 125 208 83 125
30 E, N 480 48 60 480 36 50
30 E, N 600 39 50 600 29 40
30 E, N 220 106 125 220 79 100
20 A, J 208 69 90 208 56 70
20 B, K 480 31 40 208 56 70
20 B, K 600 25 30 208 56 70
20 B, K 220 68 90 208 56 70
20 C, L 480 32 40 480 24 30
20 C, L 600 26 40 600 19 30
20 C, L 220 70 90 220 52 70
20 D, M 480 31 40 208 56 70
20 D, M 600 25 40 208 56 70
20 D, M 208 72 90 208 56 70
20 D, M 220 68 90 208 56 70
20 D, M 240 62 80 208 56 70
20 E, N 480 32 40 480 24 30
20 E, N 600 26 40 600 19 30
20 E, N 220 70 90 220 52 70
15 A, J 208 52 70 208 42 60
15 B, K 480 23 30 208 42 60
15 B, K 600 19 30 208 42 60
15 B, K 220 51 70 208 42 60
15 C, L 480 24 30 480 18 30
15 C, L 600 19 30 600 14 20
15 C, L 220 52 70 220 39 50
15 D, M 480 23 30 208 42 60
15 D, M 600 19 30 208 42 60
15 D, M 208 54 70 208 42 60
15 D, M 220 51 70 208 42 60

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 Specifications and Technical Data

Table 29 Maintenance bypass cabinet electrical data (single input) (continued)

Maintenance
Bypass Bypass Cabinet Cabinet
I/P Voltage Max Input Input OCP O/P Voltage Nominal O/P Output
kVA Type (VAC) Current CB Size (A) (VAC) Current Rating (A) OCP CB Size (A)
15 D, M 240 47 60 208 42 60
15 E, N 480 24 30 480 18 30
15 E, N 600 19 30 600 14 20
15 E, N 220 53 70 220 39 50
10 A, J 208 35 50 208 28 40
10 B, K 480 16 20 208 28 40
10 B, K 600 12 15 208 28 40
10 B, K 220 34 50 208 28 40
10 C, L 480 16 20 480 12 15
10 C, L 600 13 20 600 10 15
10 C, L 220 35 50 220 26 40
10 D, M 480 16 20 208 28 40
10 D, M 600 13 15 208 28 40
10 D, M 208 36 50 208 28 40
10 D, M 220 34 50 208 28 40
10 D, M 240 32 40 208 28 40
10 E, N 480 16 20 480 12 15
10 E, N 600 13 20 600 10 15
10 E, N 220 35 50 220 26 40

Table 30 Maintenance bypass cabinet electrical data (dual input)

System Rectifier Rectifier Bypass Bypass
I/P Voltage Max Input Input OCP Max Input Input OCP O/P Voltage Nominal O/P Output OCP
kVA Type (VAC) Current CB Size (A) Current CB Size (A) (VAC) Current Rating (A) CB Size (A)
30 F, P 480 42 50 47 50 208 83 125
30 F, P 600 33 40 37 40 208 83 125
30 F, P 208 95 125 107 125 208 83 125
30 F, P 220 90 125 101 125 208 83 125
30 F, P 240 83 100 93 100 208 83 125
20 F, P 480 28 40 31 40 208 55 70
20 F, P 600 22 30 25 30 208 56 70
20 F, P 208 64 80 71.5 80 208 56 70
20 F, P 220 61 80 68 70 208 56 70
20 F, P 240 56 70 62 70 208 56 70

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 Specifications and Technical Data

Table 30 Maintenance bypass cabinet electrical data (dual input)

System Rectifier Rectifier Bypass Bypass
I/P Voltage Max Input Input OCP Max Input Input OCP O/P Voltage Nominal O/P Output OCP
kVA Type (VAC) Current CB Size (A) Current CB Size (A) (VAC) Current Rating (A) CB Size (A)
15 F, P 480 21 30 24 30 208 42 60
15 F, P 600 17 30 19 20 208 42 60
15 F, P 208 49 60 54 60 208 42 60
15 F, P 220 46 60 51 60 208 42 60
15 F, P 240 42 60 47 50 208 42 60
10 F, P 480 14 20 16 20 208 28 40
10 F, P 600 12 15 13 15 208 28 40
10 F, P 208 33 40 36 40 208 28 40
10 F, P 220 31 40 34 40 208 28 40
10 F, P 240 29 40 32 40 208 28 40

Table 31 Multi-module bypass cabinet electrical data

System System System
System I/P Voltage Max Input Input OCP O/P Voltage Nominal O/P Output OCP
Size Type kVA (VAC) Current CB Size (A) (VAC) Current Rating (A) CB Size (A)
30 208 104 125 208 83 125
20 208 70 90 208 56 70
A00, BR0
15 208 53 70 208 42 60
10 208 35 45 208 28 40
1+1 CR1 30 208 107 150A 208 83 125
CR1, DR1 30 220 101 150A 208 83 125
CR1, DR1 30 480 46 70A 208 83 125
CR1, DR1 30 600 37 60A 208 83 125
CR1 20 208 71 100A 208 56 70
CR1, DR1 20 220 68 100A 208 56 70
CR1, DR1 20 480 31 50A 208 56 70
CR1, DR1 20 600 25 40A 208 56 70
CR1 15 208 54 80A 208 42 60
CR1, DR1 15 220 51 80A 208 42 60
CR1, DR1 15 480 23 40A 208 42 60
CR1, DR1 15 600 19 30A 208 42 60
CR1 10 208 36 60A 208 28 40
CR1, DR1 10 220 34 50A 208 28 40
CR1, DR1 10 480 16 30A 208 28 40
CR1, DR1 10 600 12 20A 208 28 40

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 Specifications and Technical Data

Table 31 Multi-module bypass cabinet electrical data (continued)

System System System
System I/P Voltage Max Input Input OCP O/P Voltage Nominal O/P Output OCP
Size Type kVA (VAC) Current CB Size (A) (VAC) Current Rating (A) CB Size (A)
30 208 104 125 208 167 225
20 208 70 90 208 111 150
A00, BR0
15 208 53 70 208 83 125
10 208 35 45 208 56 70
2+0
CR1 30 208 73 100A 208 167 225
CR1, DR1 30 220 69 100A 208 167 225
CR1, DR1 30 480 32 50A 208 167 225
CR1, DR1 30 600 25 40A 208 167 225
CR1 20 208 110 150A 208 111 150
CR1, DR1 20 220 104 150A 208 111 150
CR1, DR1 20 480 48 70A 208 111 150
CR1, DR1 20 600 38 50A 208 111 150
CR1 15 208 146 200A 208 83 125
CR1, DR1 15 220 138 200A 208 83 125
CR1, DR1 15 480 63 80A 208 83 125
CR1, DR1 15 600 51 70A 208 83 125
CR1 10 208 219 300A 208 56 70
CR1, DR1 10 220 207 300A 208 56 70
CR1, DR1 10 480 95 125A 208 56 70
CR1, DR1 10 600 76 100A 208 56 70
30 208 210 300 208 167 225
20 208 140 200 208 111 150
SR0, W00
15 208 105 150 208 83 125
10 208 70 100 208 56 70

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Table 31 Multi-module bypass cabinet electrical data (continued)

System System System
System I/P Voltage Max Input Input OCP O/P Voltage Nominal O/P Output OCP
Size Type kVA (VAC) Current CB Size (A) (VAC) Current Rating (A) CB Size (A)
30 208 104 125 208 167 225
20 208 70 90 208 111 150
E00, FR0
15 208 53 70 208 83 125
10 208 35 45 208 56 70
2+1 10 208 73 100 208 56 70
10 220 69 100 208 56 70
10 480 32 50 208 56 70
10 600 25 40 208 56 70
15 208 110 150 208 83 125
15 220 104 150 208 83 125
15 480 47 70 208 83 125
15 600 38 50 208 83 125
G01, GR1
20 208 146 200 208 111 150
20 220 138 200 208 111 150
20 480 63 100 208 111 150
20 600 51 70 208 111 150
30 208 219 300 208 167 225
30 220 207 300 208 167 225
30 480 95 125 208 167 225
30 600 76 100 208 167 225
10 220 68 100 208 56 70
10 480 31 50 208 56 70
10 600 25 40 208 56 70
15 220 102 150 208 83 125
15 480 47 70 208 83 125
15 600 38 50 208 83 125
HR1
20 220 137 200 208 111 150
20 480 63 100 208 111 150
20 600 50 70 208 111 150
30 220 205 300 208 167 225
30 480 94 125 208 167 225
30 600 75 100 208 167 225
30 208 210 300 208 167 225
20 208 140 200 208 111 150
TR0, X00
15 208 105 150 208 83 125
10 208 70 100 208 56 70

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Table 31 Multi-module bypass cabinet electrical data (continued)

System System System
System I/P Voltage Max Input Input OCP O/P Voltage Nominal O/P Output OCP
Size Type kVA (VAC) Current CB Size (A) (VAC) Current Rating (A) CB Size (A)
30 208 104 125 208 250 400
20 208 70 90 208 167 225
E00, FR0
15 208 53 70 208 125 200
10 208 35 45 208 83 125
3+0 10 208 110 150 208 83 125
10 220 104 150 208 83 125
10 480 47 60 208 83 125
10 600 38 50 208 83 125
15 208 164 225 208 125 200
15 220 155 200 208 125 200
15 480 71 90 208 125 200
15 600 57 80 208 125 200
G01, GR1
20 208 219 300 208 167 225
20 220 207 300 208 167 225
20 480 95 125 208 167 225
20 600 76 100 208 167 225
30 208 329 500 208 250 400
30 220 311 400 208 250 400
30 480 142 200 208 250 400
30 600 114 150 208 250 400
10 220 102 150 208 83 125
10 480 47 60 208 83 125
10 600 38 50 208 83 125
15 220 154 200 208 125 200
15 480 70 90 208 125 200
15 600 56 80 208 125 200
HR1
20 220 205 300 208 167 225
20 480 94 125 208 167 225
20 600 75 100 208 167 225
30 220 307 400 208 250 400
30 480 141 200 208 250 400
30 600 113 150 208 250 400
30 208 315 400 208 250 400
20 208 210 300 208 167 225
TR0, X00
15 208 158 200 208 125 200
10 208 105 150 208 83 125

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Table 31 Multi-module bypass cabinet electrical data (continued)

System System System
System I/P Voltage Max Input Input OCP O/P Voltage Nominal O/P Output OCP
Size Type kVA (VAC) Current CB Size (A) (VAC) Current Rating (A) CB Size (A)
30 208 104 125 208 250 400
20 208 70 90 208 167 225
J00, KR0
15 208 53 70 208 125 200
10 208 35 45 208 83 125
10 208 110 150 208 83 125
3+1 10 220 104 150 208 83 125
10 480 47 60 208 83 125
10 600 38 50 208 83 125
15 208 164 225 208 125 200
15 220 155 200 208 125 200
15 480 71 90 208 125 200
15 600 57 80 208 125 200
LR1
20 208 219 300 208 167 225
20 220 207 300 208 167 225
20 480 95 125 208 167 225
20 600 76 100 208 167 225
30 208 329 500 208 250 400
30 220 311 400 208 250 400
30 480 142 200 208 250 400
30 600 114 150 208 250 400
10 220 102 150 208 83 125
10 480 47 60 208 83 125
10 600 38 50 208 83 125
15 220 154 200 208 125 200
15 480 70 90 208 125 200
15 600 56 80 208 125 200
MR1
20 220 205 300 208 167 225
20 480 94 125 208 167 225
20 600 75 100 208 167 225
30 220 307 400 208 250 400
30 480 141 200 208 250 400
30 600 113 150 208 250 400
30 208 315 400 208 250 400
20 208 210 300 208 167 225
UR0, Y00
15 208 158 200 208 125 200
10 208 105 150 208 83 125

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Table 31 Multi-module bypass cabinet electrical data (continued)

System System System
System I/P Voltage Max Input Input OCP O/P Voltage Nominal O/P Output OCP
Size Type kVA (VAC) Current CB Size (A) (VAC) Current Rating (A) CB Size (A)
30 208 104 125 208 333 500
20 208 70 90 208 222 300
J00, KR0
15 208 53 70 208 167 225
10 208 35 45 208 111 150
10 208 146 175 208 111 150
10 220 138 175 208 111 150

4+0 10 480 63 80 208 111 150

10 600 51 70 208 111 150
15 208 219 300 208 167 225
15 220 207 250 208 167 225
15 480 95 125 208 167 225
15 600 76 100 208 167 225
LR1
20 208 292 400 208 222 300
20 220 276 400 208 222 300
20 480 127 175 208 222 300
20 600 101 125 208 222 300
30 208 438 600 208 333 500
30 220 414 500 208 333 500
30 480 190 250 208 333 500
30 600 152 200 208 333 500
10 220 137 175 208 111 150
10 480 63 80 208 111 150
10 600 50 60 208 111 150
15 220 205 250 208 167 225
15 480 94 125 208 167 225
15 600 75 90 208 167 225
MR1
20 220 273 400 208 222 300
20 480 125 150 208 222 300
20 600 100 125 208 222 300
30 220 410 500 208 333 500
30 480 188 225 208 333 500
30 600 150 200 208 333 500
30 208 421 500 208 333 500
20 208 280 400 208 222 300
UR0, Y00
15 208 210 250 208 167 225
10 208 140 175 208 111 150

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Table 32 Maintenance bypass cabinet lug sizes

Input
Maximum Recommended Lug
Unit Nominal System Lug T&B Lug T&B
Rating Input Voltage Bolt Size One Hole 54000 One Hole REDDY
30 600 6M (1/4”) 54105 62204
30 480 6M (1/4”) 54106 62204
30 240 6M (1/4”) 54152 62205
30 220 6M (1/4”) 54152 62205
30 208 6M (1/4”) 54152 62205
20 600 6M (1/4”) NA 62204
20 480 6M (1/4”) 54130 62204
20 240 6M (1/4”) 54107 62204
20 220 6M (1/4”) 54107 62204
20 208 6M (1/4”) 54107 62204
15 600 6M (1/4”) NA 62204
15 480 6M (1/4”) NA 62204
15 240 6M (1/4”) 54106 62204
15 220 6M (1/4”) 54106 62204
15 208 6M (1/4”) 54106 62204
10 600 6M (1/4”) NA 62204
10 480 6M (1/4”) NA 62204
10 240 6M (1/4”) 54130 62204
10 220 6M (1/4”) 54130 62204
10 208 6M (1/4”) 54130 62204

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Table 32 Maintenance bypass cabinet lug sizes (continued)

Output
Maximum Recommended Lug
Unit Nominal System Lug T&B Lug T&B
Rating Output Voltage Bolt Size One Hole 54000 One Hole REDDY
30 600 6M (1/4”) 54130 62204
30 480 6M (1/4”) 54106 62204
30 240 6M (1/4”) 54108 62205
30 220 6M (1/4”) 54108 62205
30 208 6M (1/4”) 54108 62205
20 600 6M (1/4”) NA 62204
20 480 6M (1/4”) 54130 62204
20 240 6M (1/4”) 54106 62204
20 220 6M (1/4”) 54106 62204
20 208 6M (1/4”) 54106 62204
15 600 6M (1/4”) NA 62204
15 480 6M (1/4”) NA 62204
15 240 6M (1/4”) 54106 62204
15 220 6M (1/4”) 54106 62204
15 208 6M (1/4”) 54106 62204
10 600 6M (1/4”) NA 62204
10 480 6M (1/4”) NA 62204
10 240 6M (1/4”) 54130 62204
10 220 6M (1/4”) 54130 62204
10 208 6M (1/4”) 54130 62204

Table 33 Battery cabinet physical characteristics

Battery Cabinet Dimensions Net Weight Without
Type WxDxH in. (mm) Batteries, lb. (kg)
27.2x31.4x63 551
Short Narrow
(690x825x1600) (250)
58.5x31.4x63 889
Short Wide
(1488x825x1600) (400)

Table 34 Maintenance Bypass Cabinet weights

Maintenance Bypass Cabinet Style, lb. (kg)
UPS
Rating A B C D E F J K L M N P
408 545 675 602 732 630 403 540 670 597 728 630
10kVA
(185) (247) (306) (273) (332) (286) (183) (245) (304) (271) (330) (286)
408 567 728 659 822 680 403 562 723 655 818 680
15kVA
(185) (257) (330) (299) (373) (308) (183) (255) (328) (297) (371) (308)
408 646 842 739 935 750 403 642 838 734 930 750
20kVA
(185) (293) (382) (335) (424) (340) (183) (291) (380) (333) (422) (340)
408 694 893 807 1027 840 403 690 888 802 1023 840
30kVA
(185) (315) (405) (366) (466) (381) (183) (313) (403) (364) (464) (381)

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Table 35 Maintenance bypass cabinet dimensions

Unit Width Depth Height
inch 27.2 31.4 63
mm 690 825 1600

Table 36 Multi-module paralleling cabinet dimensions

1+1 Cabinet Type Width Depth Height
1+N Narrow 27.2 31.4 63
Types A00, BR0, CR1, DR1 690 825 1600
1+N Cabinet Type Width Depth Height
1+N Narrow 27.2 31.4 63
Types A00, E00, J00 690 825 1600
1+N Wide 58.5 31.4 63
All other types 1488x 825x 1600

8.2 Cable Lengths: Floor to Connection Point Inside UPS

To help calculate the total cable length required, refer to Table 37 for the distance from the floor to
selected connection points inside the NX. Determine the cable length required to reach the NX, then
add the appropriate length from the table and adequate slack for repair and maintenance.
Table 37 Distance to connection points on the NX UPS
Distance
From From
Floor Top of Unit
Connection Point on UPS in. (mm) in. (mm)
Bypass AC input supply 30 (750) 30 (750)
UPS output AC 30 (750) 30 (750)
Neutral busbars—Input and Output 11 (280) 55 (1397
Battery power 16 (400) 58 (1474)
Auxiliary cables: Monitor board (U2) 60 (1500) 20 (508)
Communications 55 (1400) 25 (635)
Ground 8 (197) 56 (14227)
Parallel Board 70(1780) 20(508)

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NOTES

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Ensuring The High Availability
0f Mission-Critical Data And Applications.

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reduced capital equipment and operating costs. 800-222-5877
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