MC Line
MC30
THREE PHASE OVERCURRENT & EARTH FAULT RELAY
Three phase overcurrent & earth fault relay with
programmable timecurrent curves suitable for protection
of power distribution systems with insulated, resistance
earthed or compensated neutral.
Rated input current selectable 1A or 5A, 50/60 Hz.
Connection through 3 CTs.
Protective Functions Communications
• F49 : One Thermal Image element • 1 RS485 Serial communication port on rear side
• F50/51 : Three independent overcurrent elements • 1 RS232 Serial communication port on front panel
• F50N/51N : Three Earth Fault elements • Modbus RTU / IEC870-5-103 Communication Protocols
• F51BF : Breaker Failure protection
Expansion Modules (optional)
Measurements The relay support only one expansion module
• Real Time Measurements (IA - IB - IC - Io) • “UX10-4” 10 Digital Input and 4 Outputs Relay
• Maximum Demand and Inrush Recording (IA - IB - IC - Io) • “14DI” 14 Digital Inputs
• Trip Recording (last 20 trips with date & time) • “14DO” 14 Output Relays
Control Mounting
• 4 Output Relays (programmable) • 1 Module box (2 modules with expansion), totally draw-out execution
• 3 Digital Inputs • IP44 protection case (on request IP54)
• Time tagged multiple event recording
Power Supply Ratings
• Oscillographic wave form capture
• Type 1 : 24V(-20%) / 110V(+15%) a.c. - 24V(-20%) / 125V(+20%) d.c.
• Blocking Outputs and Blockings Input for pilot wire
• Type 2 : 80V(-20%) / 220V(+15%) a.c. - 90V(-20%) / 250V(+20%) d.c.
MC07-ING-Rev.06
selectivity coordination
Software
Technical Characteristics
• MSCom2 Program interface for device management
• Complete autodiagnostic program
• Display LCD 16 (2x8) characters
• 4 Leds for signalization
2
MC30
Programmable Input Quantities
In : Rated primary current of phase CTs : (1 ÷ 9999)A step 1A
Fn : System frequency : (50 ÷ 60)Hz
F49 (T>): Thermal Image
Function enabling : Enable/Disable
Temperature prealarm : Tal = (50 ÷ 110)%Tb step 1%Tb
Thermal Image reset level : Tst = (10 ÷ 100)%Tb step 1%Tb
Continuous admissible current : Ib = (50 ÷ 130) step 1 %In
Warming-up Time constant : TW = (1 ÷ 60)min step 1min
1F - 50/51 (I>): First Overcurrent Element
Function enabling : Enable/Disable
Current setting range : I> = (0.20 ÷¸ 4)In step 0.01In
Definite trip time delay (10x[I>] in inverse time operation modes) : tI> = (0.05 ÷ 60)s step 0.01s
Instantaneous output : ≤ 0.03s
Time current curves : Indep.Definite Time (D), IEC (A / B / C), IEEE (MI / VI / I / EI / SI)
2F - 50/51 (I>>): Second Overcurrent Element
Function enabling : Enable/Disable
Current setting range : I>> = (0.50 ÷ 40)In step 0.01In
Definite trip time delay : tI>> = (0.05 ÷ 60)s step 0.01s
Instantaneous output : ≤ 0.03s
Automatic threshold doubling on inrush : 2xI = Enable/Disable
3F - 50/51 (IH): Third Overcurrent Element
Function enabling : Enable/Disable
Current setting range : IH = (0.50 ÷ 40)In step 0.01In
Definite trip time delay : tIH = (0.05 ÷ 60)s step 0.01s
Instantaneous output : ≤ 0.03s
Automatic threshold doubling on inrush : 2xI = Enable/Disable
1F - 50N/51N (Io>): First Earth Fault Element
Function enabling : Enable/Disable
Current setting range : Io> = (0.01 ÷ 4)Ion, step 0.01Ion
Definite trip time delay (10x[Io>] in inverse time operation modes) : tIo> = (0.05 ÷ 60)s step 0.01s
Instantaneous output : ≤ 0.04s
Time current curves : Indep.Definite Time (D), IEC (A / B / C), IEEE (MI / VI / I / EI / SI)
2F - 50N/51N (Io>>): Second Earth Fault Element
Function enabling : Enable/Disable
Current setting range : Io>> = (0.01 ÷ 9.99)Ion step 0.01Ion
MC07-ING-Rev.06
Definite trip time delay : tIo>> = (0.05 ÷ 60)s step 0.01s
Instantaneous output : ≤ 0.04s
3F - 50N/51N (IoH): Third Earth Fault Element
Function enabling : Enable/Disable
Current setting range : IoH = (0.01 ÷ 9.99)Ion step 0.01Ion
Definite trip time delay : tIoH = (0.05 ÷ 60)s step 0.01s
Instantaneous output : ≤ 0.04s
Breaker Failure Element
Trip time delay : tBF = (0.05 ÷ 0.75)s step 0.01s
3
MC30
Connection Diagram
Typical Characteristics
Accuracy at reference value of influencing factors 2% In - 0.2% On for measurements
2% + (to = 20 ÷ 30ms @ 2xIs) for times
Rated Current In = 1A/5A - On = 1A/5A
Current Overload 400A for 1 sec; 20A continuous
Burden on current input 0.1VA a In = 1A; 0.3VA a In = 5A
Average power supply consumption ≤ 7 VA
Output relays rating 6 A; Vn = 250 V
A.C. resistive switching = 1500W (400V max)
make = 30 A (peak) 0.5 sec.;
break = 0.3 A, 110 Vcc,
L/R = 40 ms (100.000 op.)
Order code - Example :
MC07-ING-Rev.06
MC30 1 2 1 1
Power Supply Phase Rated Zero sequence Output Options
Input Current Input Current
1 = Type 1 1 = 1A 1 = 1A 1 = Standard (with R4)
2 = Type 2 2 = 5A 2 = 5A 2 = UX10-4
3 = 14DI
4 = 14DO
btsadv.com
The performances and the characteristics reported in this document are not binding and can modified at any moment without notice.
Microelettrica Scientifica S.p.A. - 20089 Rozzano (MI) - Via Alberelle 56/58 Italy
Tel. +39 02 575731 - Fax +39 02 57510940 - E-Mail: sales.relays@microelettrica.com
www.microelettrica.com
