Enclosed ATS

Auto
Mode

Enclosed Automatic Transfer Switch

ABOUT US

Larsen & Toubro is the product of a partnership that began in 1938.

Founded in 1938 by two Danish engineers, L&T is today an Indian
company with a global presence and a global vision.

We are a multi-billion-dollar Indian multinational engaged in

technology, engineering, construction, manufacturing and financial
services. We have a wide network of offices, and collaborates with Switchgear Factory, Navi Mumbai

leading international majors. A strong, customer-focused approach

and the constant quest for top-class quality have enabled us to attain
and sustain leadership in our major lines of business for over seven
decades.

L&T Switchgear, part of our Electrical & Automation business, is India's

largest manufacturer of low voltage switchgear, with the scale, Switchgear Factory, Ahmednagar
sophistication and range to meet global benchmarks.

We make the best of the experience acquired across seven decades

and the advanced technology available today to make products that fit
your every need.

Switchgear Factory, Vadodara

SWITCHGEAR TRAINING CENTRES

L&T Electrical & Automation, India's leading switchgear company, is dedicated to promoting excellence
in among the fraternity of electrical practitioners. Beginning with a single Switchgear Training Centre
(STC) in Pune in 1986, the initiative has grown to cover 6 state-of the-art facilities at strategic locations
across the country.

The STCs offer a wide range of courses with hands-on training for students, electricians, electrical
engineers, panel builders and consultants. A cutting-edge curriculum, refreshed regularly, helps
enhance on-site electrical safety, system reliability and cost efficiency.

Pune Vadodara Delhi

Tel: 020 2712 0037 / 2712 0653 Tel: 0265 2457805 Tel: 011 41419515 /
E-mail: stc-pune@Lntebg.com E-mail: stc-vadodara@Lntebg.com 41419695 / 41419500
E-mail: stc-delhi@Lntebg.com

Coonoor Kolkata Lucknow

Tel. : 0423 251 7107 Tel: 033 42005975 / 42005978 Tel: 0522 247 6015 /
E-mail: stc-coonoor@Lntebg.com E-mail: stc-kolkata@Lntebg.com 97944 54455
E-mail: stc-lucknow@Lntebg.com
 CONTENT

Introduction 01

Enclosed ATS Salient Features 02

Motorised Changeover Salient Features 03

AuXC-2000 Controller Salient Features 05

Technical Parameters 09

Wiring Diagrams & Control Logic 11

Programming, Settings & Ordering Information 12

Overall Dimensions 13
 INTRODUCTION

Rapid industrialization and urbanization are leading to ever-rising demand for reliable
electricity.

Technological advancement and changing lifestyles have given rise to many applications
which demand 24 X7 uninterruptible power supply. In some industries, power outages
for even short duration may lead to considerable commercial losses.

L&T’s Enclosed Automatic Transfer Switch(ATS) constantly monitors the incoming power
sources and seamlessly switches the load to the ‘back-up’ supply when it senses
variation or abnormality in the main supply. Once main supply is restored, the load is
automatically shifted to the main supply.

Option of priority source selection and swapping gives additional flexibility to suit
different site requirements.

These switches are very convenient to use as one does not have to manually operate the
switch.

The typical applications are in critical processes in various industries and also in growing
residential, commercial & infrastructure segments.

Enclosed Automatic Transfer Switch (ATS):

L&T’s C-Line Motorised Changeover switch alongwith AuxC 2000 controller is

completely pre-programmed and pre-wired Automatic Source Transfer Solution.

What’s more is that the complete ensemble is mounted in a smart engineered SS

enclosure providing a ready, convenient -to-use solution.

Automatic Solution | Pre-wired | Flexible Settings

1
Enclosed Automatic
Transfer Switch

Range:
125A to 630A,
415V AC

Flexibility
• Priority Source Selection
• Adjustable Time Delay (0.1 sec to 3 hours)
• Suitable for 3-Phase as well as 1-Phase Sources

Performance
• Double-Break Contact System offering High
Short-time withstand (ICW)
• High Mechanical & Electrical Life: Double than
requirement of IS/IEC Standard
• Suitable for Aluminium Termination

Safety
• Protections : UV/OV, Phase Sequence, Single
Phasing, Frequency
• Authorized Access Control through Password
Protection
• Inbuilt Terminal Shrouds, Phase Barriers &
Source Separator

Convenience
• Ample Space for Cable Termination,
No need of Separate Cable Gland Box
• Ease of Generator Control
(ON-OFF Cooling Cycle, Self-Test)
• Cyclic Event Logger : Logs 100 Events

2
Motorised Changeover
Product Features

3
Clear Manual override Manual and Auto
termination Manual operation of motorised
changeover switch is also
mode selection
access feasible through the manual
The selector switch enables/disables
Motorised kit (EOM) fits well the control supply to motorised
override feature. As a safety
within the body of the manual changeover switch. Electrical
feature, the control supply of
changeover switch, enabling operation is possible only in auto
motorised kit (EOM) is
clear access to the terminals mode while manual mode allows
automatically cut off during the
even after mounting the the user to operate the motorised
insertion of handle
motorised kit changeover switch manually using
the handle safely by cut-off of
control supply to motorised
changeover switch

Auxiliary Pad locking Fuse

contacts Provision for padlocking protection
It consists two sets of in OFF position with Inbuilt glass fuse of 5 x 20
changeover contacts one three padlocks of Ø5 to size protects the motorised
for each S-D. It is prewired Ø7. Padlocking possible kit (EOM) during
and prefitted in motorised in both auto and manual abnormalities. Also, spare
changeover switch mode fuse holder has been
provided for storage of fuse

4
AuXC-2000 Controller

tic
a
m er
to sf
Au ran
T

L&T’s micro-processor based Automatic

Transfer Controller AuXC-2000 in L&T
Enclosed ATS is the answer to all auto
source transfer requirements.

5
 AuXC-2000 Controller
Intuitive user interface Password access to prevent any unauthorized
• 5 keys navigation keypad for parameters setting access
• 128x80 pixel, Backlit LCD screen with 4 Grey levels • The password is used to enable or disable the access
to setting menu and to commands menu
Status at a glance
• 4 LEDs for plant synoptic (source line and ATS status) Generator setup
• 2 LEDs for alarm presence and AUTO mode active • Management of generator set start-stop & cooling cycle
• Management of automatic test for generators with
Flexibility to suit site conditions emergency and rotation
• Suitable for switching between Utility-Utility or
Utility-Gensetor Genset-Genset Failure simulation
• Selection between auto and manual mode of switching • Test the changeover setup without connecting actual load
• Enabling and disabling of priority supply
• Settable transition time for allevents Event Logger
• Storage of last 100 events
Programmable digital inputs, outputs &
alarms to control changeover device
• 6 programmable digital inputs
• 6 +1digital outputs:
- 6 relay swith NO contact (8A, 250V AC)
- 1 relay swith changeover contact (8A, 250V AC)
• 18 alarms (4 user programmable alarms)

Measuring accuracy OUT4 and OUT 5 outputs: terminals 25,26,27

Mains and generator voltage ±0.25% f.s. ±1digit Contact type 2 x 1 NO + contact common
Real time clock AC1 - 8A 250V~
Rated current DC1 - 8A 30V=
Energy storage Back-up capacitors AC15 -1.5A 250V~
Operating time without supply voltage About 5 minutes Max rated voltage 300V~
Digital inputs: terminals 15 - 20 Mechanical / electrical endurance 1x107 / 1x105 ops
Input type Negative Maximum current at contact common 10A
Current input £
8mA OUT6 and OUT 7 outputs: terminals 28,29,30
Input “low” voltage £
2.2 Contact type 2 x 1 NO + contact common
Input “high” voltage ³
3.4 AC1 - 8A 250V~
Rated current DC1 - 8A 30V=
Input delay ³
50ms AC15 -1.5A 250V~
OUT1 and OUT 2 outputs: terminals 9,10 e 11,12 Max rated voltage 300V~
Contact type 2 x 1 NO Mechanical / electrical endurance 1x107 / 1x105 ops
AC1 - 8A 250V~ Maximum current at contact common 10A
Rated current DC1 - 8A 30V=
AC15 -1.5A 250V~ Connections
Max rated voltage 300V~ Terminal type Plug-in / removable
7 5
Mechanical / electrical endurance 1x10 / 1x10 ops Cable cross section (min... max) 0.2-2.5 mm²
OUT3 output: terminals 22, 23, 24 Tightening torque 0.56 Nm
Contact type 1 changeover Housing
AC1 - 8A 250V~ Version Flushmount
Rated current DC1 - 8A 30V=
AC15 -1.5A 250V~ Material Polycarbonate
Max rated voltage 300V~ Degree of protection IP40 on front / IP20 terminals
7 5
Mechanical / electrical endurance 1x10 / 1x10 ops Weight 680g
* Note: This product has been designed for environment A. Use of this product in
environment B may cause unwanted electromagnetic disturbances in which case the
user may be required to take adequate mitigation measures.

6
 AuXC-2000 Controller

Front buttons functions

Selects the
OFF operating
mode

Selects the automatic Select the manual

mode. Green operating mode
AUT LED lights

▲ and ▼ keys - Used to scroll through the display pages or to select the list of options
in a menu. Simultaneously pressing ▼ + ▲ calls up the Main menu with rotating icons

Front LED
Line 1 voltage status Line 2 voltage status
LED (green) - LED (green) -
indicates that the line indicates that the line
voltage source 1 is within voltage source 2 is within
the programmed limits the programmed limits.

Line 1 ATS status Line 2 ATS status

LED (yellow) - Steady glow LED (yellow) - Steady glow
indicates the open or closed indicates the open or closed
state of the ATS. Flashing LED state of the ATS. Flashing LED
indicates a mismatch between indicates a mismatch between
the desired state of the ATS the desired state of the ATS
and its true state detected and its true state detected
by the feedback input. by the feedback input.

AUT LED (green) -

Alarm LED (red) -
Indicates that the
Flashing, indicates
automatic mode
an active alarm
is active

Modes of Operation:
OFF Mode:
In this mode, the automatic control is disabled and the controller does not take any action. All views of the measures and the status
of the LEDs remain active.
To access the programming/settings menu, it is mandatory to operate in OFF mode.
Pressing the OFF-RESET button resets the retentive alarms, provided the conditions that generated the alarm have been removed.
7
Manual Mode:
In this mode, the ATS can be manually controlled by the pressing the MAN key.
Closing/opening operation can be done by:
- Selecting the switch position
- Pressing the up and down buttons to confirm the closing or opening operation
The generators can also be controlled manually by moving on the page start/stop groups.

Voltage Line 1 Voltage Line 2

Voltage Line 1 Voltage Line 2

Line 2 selected
Breaker 1 selected
Selectable function
Function selectable Page scroll locked with MAN
Page scroll locked with MAN

Auto Mode:
The AUT mode is indicated by the green LED for AUT. In automatic mode, the controller automatically gives command for opening
& closing of the ATS. When the priority line voltage is out of bounds for a time longer than that specified (line presence green LED
turns off), the unit disconnects the load from the priority line and connects it to secondary line considering start-up of generator
(if programmed) and interlock time delay. When the priority line returns within the programmed limits, the controller will switch
back the load on it.
The cycles of automatic operation vary according to the type of application (utility-utility, utility-generator, generator generator).

8
Enclosed Automatic Transfer Switch

Rating(A) Unit
Reference Standards
Type Designation
No. of Poles
Rated Operational Voltage(Ue) (power circuit)
Rated Impulse Withstand Volatge(Uimp) ( power circuit) (V)
Rated Operational Voltage(Ue) (control circuit) (kV)
Rated Impulse Withstand Volatge(Uimp) ( control circuit) (kV)
Rated Frequency (Hz)
Pollution Degree
Conventional enclosed thermal current at 40O(Ithe) (A)
Rated Operational Current(I the) according to IS/IEC: 60947-3
415Vac, AC-21A / AC-22A / AC-23A (A)
Rated Operational Current(I the) according to IS/IEC: 60947-6
415Vac, AC-31B (A)
415Vac, AC-31A (A)
415Vac, AC-32B (A)
Rated breaking capacity for AC-23A (A)
Rated making capacity for AC-23A (A)
1 sec (kA rms)
Short time withstand, lcw (kA rms)
0.2 sec
Short-circuit making capacity, lcm (kA peak)
Endurance (category AC 23A) Mechanical (O-I-O-II-O cycle)
Endurance (category AC 23 A) Electrical (O-I-O-II-O cycle)
Rated fused short-circuit current at 415V, 50/60 Hz DIN/Cylin (kA rms)
Operating torque (N-m)
Weight (kg)
Rated Control Voltage (V)
Control Voltage Range (%)
Max. Current at 240V ac (A)
O-I / I-O (sec)
Operating time
I-II / II-I (sec)
Black out time (sec)
Termination
Maximum Al. cable with lug ( sq. mm)
Maximum link width (mm)
Maximum link thickness (mm)
Termination tightening torque (N-m)

9
 Frame 2 Frame 3 Frame 4
125A 160A 200A 250A 315A 400A 630A
IS / IEC 60947-3, EN 60947-3, IS / IEC 60947-6-1, EN 60947-6-1
ATS-125 ATS-160 ATS-200 ATS-250 ATS-315 ATS-400 ATS-630
4 Pole 4 Pole 4 Pole 4 Pole 4 Pole 4 Pole 4 Pole
415 415 415 415 415 415 415
12 12 12 12 12 12 12

4 4 4 4 4 4 4
50/60 50/60 50/60 50/60 50/60 50/60 50/60
3 3 3 3 3 3 3
125 160 200 250 315 400 630

125 160 200 250 315 400 630

125 160 200 250 315 400 500

125 160 200 250 315 400 500
125 160 200 250 315 400 500
1000 1280 1600 2000 2520 3200 5040
1250 1600 2000 2500 3150 4000 6300
8 8 10 16 18 22 26
18 18 18 28 28 35 35
14 14 17 32 36 46 55
16000 16000 16000 16000 16000 10000 10000
2000 2000 2000 2000 2000 2000 2000
100 100 100 100 100 100 100
10 10 10 20 20 28 28
18.2 18.2 19.0 29.5 30.0 41.3 41.6
240 240 240 240 240 240 240
85%-110% 85%-110% 85%-110% 85%-110% 85%-110% 85%-110% 85%-110%
2 2 2 2 2 2 2
1.5 1.5 1.5 1.6 1.6 1.7 1.7
2.5 2.5 2.5 2.5 2.5 2.5 2.5
2.2 2.2 2.2 2.2 2.2 2.2 2.2

95 95 150 185 240 2 X 300 2 X 300

30 30 30 40 40 50 50
5 5 5 8 8 8 2*8
10 10 10 20 20 27 27

10
Wiring Diagrams & Control Logic
SOURCE 1 SOURCE 2

K2 K1

K1 K2
K1
K2
K1
K2

1 2 3 4 5 6 7 8 9 10 11 12 13 14
L1 L2 L3 N L1 L2 L3 N A1 A2
OUT 1

OUT 2

Line 1 Line 2 Aux supply

100 - 480V~ 100 - 480V~ 100 - 240V~
50/60 Hz 50/60 Hz 50/60 Hz
3W/ 8VA
OUT1 - OUT7
B300 / 250V~ 8A AC1 / 1A 30V= PILOT DUTY
INP 1
INP 2
INP 3
INP 4
INP 5
INP 6
COM

OUT 3

OUT 4

OUT 5

OUT 6

OUT 7

15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
INP 1
INP 2
INP 3
INP 4
INP 5
INP 6
COM

OUT 3

OUT 4

OUT 5

OUT 6

OUT 7

15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

NC-II NO-II C-II C-I NO-I NC-I P N E ON-I OFF ON-II

MCO AUXILIARY CONTACT MCO CONTROL
CONNECTIONS CONNECTIONS

11
Pre-programmed Parameters Time Delay Setting
Preprogrammed Available
Parameter Code
Programing Connection Code Setting (Description) Setting
Terminal Line 1 to Line 2 interlock time M05>>P05.03 0.1 0.1....1800Sec
15(INP1) M10>> P10.01.01 Line 1 closed (Feedback 1)
Inputs Line 2 to Line 1 interlock time M05>>P05.04 0.1 0.1....1800Sec
16(INP2) M10>> P10.02.01 Line 2 closed(Feedback 2)
Presence delay 1
25(OUT4) M11>> P11.04.01 Close line 1 (When Line 2 source not available) M06>>P06.07 1....6000Sec
Outputs 27(OUT5) M11>> P11.05.01 Open line 1 / line 2 Presence delay M06>>P06.08 1 1....6000Sec
(When Line 2 source available)
30(OUT7) M11>> P11.07.01 Close line 2
Presence delay 1....6000Sec
Others - M05>> P05.07 Changeover Pulse (When Line 1 source not available) M07>>P07.07 1
Presence delay
(When Line 2 source available) M07>>P07.08 1 1....6000Sec

Protection Parameter Setting General Control Setting

Preprogrammed Available
Parameter Code Preprogrammed Parameter Code Setting
Phase Sequence Control M02>>P02.05 OFF Select Nominal Voltage M02>>P02.01 415 50-5000 V AC
Undervoltage setting for Line 1 M06>>P06.01 85% L-L
Select Voltage Control Mode M02>>P02.07 L-L L-N
Overvoltage setting for Line 1 M06>>P06.04 110% L-L+L-N
Undervoltage setting for Line 2 M07>>P07.01 85% -1- Line 1
Select Priority Line M05>>P05.02 -1-
Overvoltage setting for Line 2 M07>>P07.04 110% -2- Line 2

Generator Start/Stop Control

Parameter Code Preprogrammed Comments

Digital Output 3 Start/Stop remote control Hardwire to generator

(Terminal No. 22 & 23) M11>> P11.03.01 of line 2 generator controller for ON/OFF Control

Digital Input 6 Hardwire for generator

(Terminal No. 20 & 21) M10>> P10.06.01 Generator ready 2 status feedback

Note : Refer AuXC2000- Automatic Transfer Controller Manual for further details and complete settings/programming parameters

Ordering Information
Description CAT No.
Enclosed ATS, Frame 2, 125A CK90161BSOO
Enclosed ATS, Frame 2, 160A CK90162BSOO
Enclosed ATS, Frame 2, 200A CK90163BSOO
Enclosed ATS, Frame 3, 250A CK90164BSOO
Enclosed ATS, Frame 3, 315A CK90165BSOO
Enclosed ATS, Frame 4, 400A CK90166BSOO
Enclosed ATS, Frame 4, 630A CK90167BSOO

Cat. Nos. for Accessories

Rating (A) 125 160 200 250 315 400 630
HANDLE CK90374OOOO CK90378OOOO
AuXC-2000 CONTROLLER ATC2000OOOO ATC2000OOOO

12
 Enclosed ATS
Overall Dimensions

E C D
B
213

Mounting Holes

RATING (A) A B MOUNTING

C D E
HOLE SIZE
125/160/200 439 409 243 66 7.5 M8
250/315 578 486 278 66 7.5 M8
400/630 740 561.2 297 66 7.5 M8

Dimensions for Enclosure Mounting

B
A 213

RATING(A) A B C D

125/160/200 51 213 44.5 350

250/315 88.5 213 114 350

D
400/630 59.5 346 70 600

13
Enclosed ATS
Handle Clamp & IP Cover Mounting
Clamp Mounting for Handle
- Remove the screws and fix clamp to the enclosure as shown.
- Keep the handle inside the clamp when not in use.

IP Cover Mounting
Insert the IP cover as shown

Click

Caution: Remove IP cover for manual operation.

14
Notes:
Notes:
SP 51009 R0