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Air Circuit Breakers

About us

Switchgear Factory, Ahmednagar

Switchgear Factory, Mumbai

Larsen & Toubro is a technology-driven company that infuses engineering with imagination. The

Company offers a wide range of advanced solutions in the field of Engineering, Construction,

Electrical & Automation, Machinery and Information Technology.

L&T Switchgear, a part of the Electrical & Automation business, is India's largest manufacturer of low

voltage switchgear, with the scale, sophistication and range to meet global benchmarks. With over

five decades of experience in this field, the Company today enjoys a leadership position in the Indian

market with a growing international presence.

It offers a complete range of products including powergear, controlgear, industrial automation,

building electricals & automation, reactive power management, energy meters, and protective

relays. These products conform to Indian and International Standards.

1

L&T’s Air Circuit Breakers (ACBs) are specially designed for extreme tropical conditions and have a proven

track record of more than 30 years. Presently more than 3,50,000 Air Circuit Breakers supplied by L&T are

being used for diverse applications. The Air Circuit Breakers provide technologically driven

solutions to meet customer needs.

Unique feature of lcu=lcs=lcw for 1 second across the entire range. This ensures complete selectivity for

system with time based discrimination.

Inherent design to perform in extreme tropical conditions. Typical site conditions like high ambient

temperature, humidity and dusty environment are best handled by ACBs without compromising on

performance and safety.

Complete selectivity

Perfect for Indian conditions

Optimal compactness

Widest choice of over current protection releases

Elegant design & rugged construction

Range to meet every customer’s need

Designed to ensure

lLow inherent temperature rise

lAdequate interface clearances

lAdvance micro-controller based with option of communication & metering-SR71

lMicro processor based releases-

lThermo-magnetic release-DN1

lCommon door cutout for entire range

lLeft aligned cutout for all ratings

lUniform height and depth for ACBs upto 4000 Amp

Various options to choose from

lBreaking capacity from 50kA to 100kA

l3 Pole or 4 Pole configuration

lFixed or Drawout version

lAuto or Manual reset mechanism

lIndependent manual or stored energy type, manual or electrically operated mechanism

lDifferent terminal orientations : Flat, Horizontal and Vertical

SR18/SR18G/SR21i


User friendly features

l

Safety

l“ ’’ marked for C, S1 & H ranges

lSuperior quality engineering grade plastics used for insulation purpose; conforms to Glow wire test

(Ref: IEC 60695-2-1)

lIn-built mechanical anti-pumping

lIn-built rating error preventor in drawout ACBs ensure correct rating of drawout portion in

corresponding cradle

lSafety shutters prevent accidental contact with live cradle terminals

lVariety of Safety Interlocks

lEasily removable arc chutes without use of any tool

lOperating voltage ranges from 10% Un to 110% Un for shunt release ensures intentional tripping

even at high voltage drops during short circuit

l

Conformance to standards

lIEC - 60947 (Part 1 & 2)

lIS/IEC - 60947 (Part 1 & 2)

lIEC 60695 - 2 - 1

lBS EN 60947 - 2

lFront accessible over current release settings, telescopic racking handle and various racking

interlocks; no need to open the panel door

lUnique ‘Maintenance position’ in drawout type ACBs to facilitate maintenance & inspection without

removing ACB from the panel

lMultitap CTs for enhancing protection range

lWide variety of Amperemetric and Voltmetric releases

lFully rated neutral pole for the entire range

lLockable sliding shutters to prevent unauthorized access to “TRIP” and “CLOSE” push buttons

lCan be used as an ON / OFF Load Isolator

lExtendable Electrical Life:

- By replacing the arcing contacts at site, for all ratings

- Without changing pole assembly

lProgrammable SICs: Auxiliary contacts in drawout ACBs are programmable for only Service, Only

Test, Test and Service, and All Positions

lProtection releases are easily interchangeable at site

lFacility for site conversion of manually operated ACBs to electrically operated ACBs

in DN1 release

Jaws on breaker facilitate ease of maintenance & replacement of contact jaws

to prevent auto-reclosing of ACB on persisting faults

Transparent safety shutter offers easy inspection of cradle contacts & reduces the maintenance time

2

Range

3

Breaking capacities:

CN-CS : S1

CN-CS : E

50kA 50kA 50kA

50kA 50kA

50kA 50kA

630A400A

CN-CS : C

CN-CS : H

CN-CS : H0

CN-CS : H/H1

Frame-1

50kA 50kA 50kA 50kA

65kA 65kA 65kA 65kA

800A 1000A 1250A 1600A

50kA

Icu = Ics = Icw

Frame-1 Frame-2

50kA

50kA 50kA 50kA 50kA

60kA 60kA

Frame-3Frame-2

55kA 60kA

75kA 75kA

75kA

100kA

2000A 2500A 3200A

75kA

100kA

95kA 95kA

4000A 5000A 6300A

Frame-4

Rated Current

50kA

Frame-1

5

S1

50

-

50

-

50

50

-

105

-

C

3/4

50

35

50

35

50

50

35

105

73.5

H

65

50

65

50

65

65

50

143

105

E

3

50

-

50

-

50

50

-

105

-

S1

50

-

50

-

50

50

-

105

-

C

3/4

50

35

50

35

50

50

35

105

73.5

H

65

50

65

50

65

65

50

143

105

E

3

50

-

50

-

50

50

-

105

-

C

3/4

55

40

55

40

55

55

50

121

84

20000

394

482

628

431

468

555

701

587

S1

50

-

50

-

50

50

-

105

-

2000

2000

415

1000

1250

1250

415

1000

394

326

414

431

20000

394

326

414

431

20000

H

75

65

75

65

75

75

65

165

143

1600

1600

415

1000

2500

C

2500

415

1000

3/4

60

40

60

40

60

60

55

132

84

S1

60

-

60

-

60

60

-

132

-

H

75

65

75

65

75

75

65

165

143

3200

H0

3200

415

1000

3/4

75

65

75

65

75

75

70

165

143

S1

60

-

60

-

60

60

-

132

-

H1

100

85

100

85

100

100

85

220

187

H0

75

65

75

65

75

75

70

165

143

H

100

85

100

85

100

100

85

220

187

5000

C

5000

415

1000

3/4

95

D

95

D

95

95

D

209

D

6300

C

6300

415

1000

3/4

95

D

95

D

95

95

D

209

D

4000

4000

415

1000

3/4

394

482

628

431

D

D

D

D

468

701

909

587

10000

D

D

D

D

468

701

909

587

‡ Electrical life = Mechanical life. However, arcing contacts need to be replaced depending upon wear & tear.D Please consult us.

4 4 4 4

12

40

60

B

P

40

60

B

P

40

60

B

P

40

60

B

P

40

60

B

P

40

60

B

P

P

P

P

P

7000

P

P

P

P

7000

468

399

487

587

P

P

P

P

7000

P

x

P

x

6000

385

316

-

423.5

-

-

-

-

P

P

P

P

7000

P

P

P

P

7000

P

P

P

P

7000

P

x

P

x

4500

385

316

-

423.5

-

-

-

-

x

P

P

P

5000

-

-

-

-

468

399

487

587

P

P

P

P

5000

P

P

P

P

5000

x

P

P

P

5000

-

-

-

-

P

P

P

P

20000

5000

468

555

701

587

P

P

P

P

5000

x

P

P

P

5000

-

-

-

-

468

555

701

587

x

P

P

P

x

P

P

P

5000

x

P

P

P

5000

x

P

P

P

5000 2500

-

-

-

-

583

913

1182

691

x

P

P

P

P

x

P

P

P

2500

-

-

-

-

583

913

1182

691

40

60

B

4

12

4

12 12 12

4 4

40

60

B

P

10000

5000

5000 5000

8 812 12 12

* Please consult us for application at dc voltages & higher operational voltage upto ** Icw values are indicated based on thermal considerations. While selecting a breaker please ensure that Icw requirement for the application is not more than Ics / Icu at the point of installation.

690V AC.

4

Technical Data Sheet

E

3

50

-

50

-

50

50

-

105

-

S1

50

-

50

-

50

50

-

105

-

C

3/4

50

35

50

35

50

50

35

105

73.5

H

65

50

65

50

65

65

50

143

105

E

3

50

-

50

-

50

50

-

105

-

1000

1000

415

1000

394

326

414

431

Rating (A)

Type Designation

Rated current (A) at 50°C

Rated operational voltage (V), 50/60Hz

Rated insulation voltage (V), 50/60Hz

No. of poles

380/415/500V

690V

380/415/500V

690V

0.5 sec

1 sec

3 sec

380/415/500V

690V

Fixed

Draw out

400

E

400

415

1000

3

50

-

50

-

50

50

-

105

-

E

3

50

-

50

-

50

50

-

105

-

S1

3/4

50

-

50

-

50

50

-

105

-

S1

50

-

50

-

50

50

-

105

-

E

3

50

-

50

-

50

50

-

105

-

In

*Ue

Ui

Icu

Ics

**Icw

Icm

630

630

415

1000

800

800

415

1000

C

3/4

50

35

50

35

50

50

35

105

73.5

H

65

50

65

50

65

65

50

143

105

394

326

414

431

3 Pole

4 Pole

3 Pole

4 Pole

H

W

D

H

W

D

44 4

40

60

B

P

40

60

B

P

40

60

B

P

Rated impulse withstand voltage

of main circuit (kV)

Rated making capacity50/60Hz (kA peak)

40

60

B

x

x

15000

6000

385

316

-

423.5

-

-

-

-

P

P

P

P

P

x

x

15000

6000

385

316

-

423.5

-

-

-

-

P

P

P

P

8000

P

P

x

x

15000

6000

385

316

-

423.5

-

-

-

-

P

P

P

P

8000

P

P

P

P

20000

8000

468

399

487

587


of aux. circuit (kV)Uimp 4

P

P

P

P

8000

P

x

P

x

15000

6000

385

316

-

423.5

-

-

-

-

P

P

P

P

8000

P

P

P

P

20000

8000

468

399

487

587

Uimp

P

P

P

P

8000

P

x

P

x

6000

385

316

-

423.5

-

-

-

-

Typical opening time (ms)

Typical closing time (ms)

Utilization category

Suitability for isolation

Fixed

Draw out

Manual

Electrical

‡Electrical & Mechanical life (operating cycles)

Electrical life without maintenance

Dimensions (in mm)

8 8 8 8 812 12 12

20000

Rated short time

withstand capacity

50/60Hz (kA rms)

Rated service short circuit breaking

capacity 50/60Hz (kA rms)

Rated ultimate short circuit breaking

capacity 50/60Hz (kA rms)

394

326

414

431

468

399

487

587

468

399

487

587

Microprocessor-based, Communication-capable Release - SR71

l RMS sensing

l Offers comprehensive protection for overload, short circuit,

instantaneous, earth fault and neutral overload

l High resolution backlit LCD display

lIntelligent Pre-trip alarm to prevent system shutdown

l Password protected settings and commands

l MODBUS RTU protocol

l LED indication for POWER ON, different faults and Pre-trip alarm

l 2 sets of storable protection settings

l

3 programmable contacts-1 for micro controller failure, 2 for basic

fault annunciation

l Auto-doubling features to prevent nuisance tripping2

l Selectable I t based current for short-time and earth fault zones

l Thermal reflectivity enables faster tripping on recurrent overloads

l

l

l

True

with intrinsic RS 485 port

Last 5 trips & 128 Event records with time & date stamping

Rating-plug for precise protection at lower load currents

Inbuilt Zone Selective Interlocking

Provision for Self-diagnostic test

Conformance to EMI/EMC standards

l

l4 relay contacts for indication of exceeding maximum demand, Pre-trip

alarm and control on breaker (closing and opening)

l

Protection releases

6

Screen Abbreviation

Details Factory Settings

Parameter

2l t OFF2l t ON

PICKUP

TMS-tr

PREALAR

THM-MEM

FUNC

PICKUP

DELAY

PICKUP

DELAY

DELAY

PREALAR2l t

COLDPIC

CP-DLY

FUNC

PICKUP

FUNC

PICKUP

DELAY

PREALAR2l t

COLDPIC

Current Settings (A), Ir = In x ....

Time Delay, Tr (sec) at 6 x Ir

Pre-trip Alarm Settings

Thermal Reflectivity

Function

Current Settings (A), In = Irx ....

Time Delay (sec)

Current Settings (A), Isd = In x ....

Time Delay, tsd (msec) at 10 x In

Pre-trip Alarm Settings2l t

Cold-load Pickup

Cold-load Pickup Delay

Function

Current Settings (A), Ii = In x ....

Function

Current Settings (A), Ig = In x ....

Time Delay (sec), tg

Pre-trip Alarm Settings2l t

Cold-load Pickup

Overload

(Phase)

Neutral Fault

Short Circuit

Instantaneous

Earth Fault

0.4 to 1.0 In steps of 0.05 In

0.5-1-2-4-6-12-18-24-30

0.5 to 0.95 Ir in steps of 0.05 Ir

ON / OFF

Enable / Disable

0.5-1.0

Same as 'Overload (Phase)'

2 to 10 In in steps of 0.5 In

20-100-200-300-400

20-100-200-300-400

0.5 to 0.95 Is in steps of 0.05 Is

ON / OFF

Enable / Disable

0.1 to 10 sec in steps of 0.1 sec

Enable / Disable

2 to 16 In in steps of 0.1 In

Enable / Disable20.1 to 0.6 in steps of 0.05 In for l t ON20.1 to 0.6 in steps of 0.01 In for l t OFF

2100 to 400 msecs in steps of 100 msec for l t ON20.1 to 5 sec in steps of 100 msec for l t OFF

0.5 to 0.95 Ig in steps of 0.05 Ig

ON / OFF

Enable / Disable

in 1.0 In

30 sec

0.95 Ir

OFF

1.0 Ir

30 sec

10 In

400 msec

400 msec

0.95 Is

Disable

0.1 sec

Enable

16 In

Enable

0.6 In

3 sec

0.95 Ig

OFF

Disable

Note: Both Protection Groups 1 & 2 carry the same factory settings.

Salient Features

# Requires SR71-PM module

Under Current

Current Unbalance

Over Voltage #

Under Voltage #

Under Frequency #

Over Frequency #

Reverse Power #

Phase Sequence #

Breaker Failure

Maximum Demand Exceed

i -Discrimination

Function

Current Setting (A) x In

Time Delay (secs)

Trip / Alarm

Function

Current Setting (A) x In

Time Delay (secs)

Function

Voltage Setting (V) Vs = Vn x ..

Time Delay (secs)

Reset Voltage

Trip / Alarm

Function

Voltage Setting (V) Vn x ..

Time Delay (secs)

Reset Voltage

Trip / Alarm

Function

Frequency Setting (Hz)

Time Delay (secs)

Drop Off Frequency

Trip / Alarm

Function

Frequency Setting (Hz)

Time Delay (secs)

Drop Off Frequency

Trip / Alarm

Function

Settings (kW)

Time Delay (secs)

Trip Alarm

Function

Settings

Time Delay (secs)

Trip / Alarm

Function

Time Delay (secs)

Function

Settings (kW)

Step

15% to 80% in steps of 5% In

1 to 255 in steps of 1 second

Either / Both

Enable / Disable

10% to 95% in steps of 5% In

1 to 10 in steps of 5 secs

Enable / Disable

105% to 150% in steps of 5% Vn

0.1 to 100 in steps of 0.1 secs

85% to 98% in steps of 1% Vs

Either / Both

Enable / Disable

45% to 65% in steps of 5% Vn

0.1 to 5 in steps of 0.1 secs

102% to 115% in steps of 1% Vs

Either / Both

Enable / Disable

45 to 50Hz for 50Hz in steps of 0.01Hz


0.1 to 100 secs in steps of 0.1 Second

0.02 to 0.10Hz in steps of 0.1Hz

Either / Both

Enable / Disable



o.1 to 100 secs in steps of 0.1 second

0.02 to 0.10Hz in steps of 0.1Hz

Either / Both

Enable / Disable

0.02 to 0.4 in steps of 0.01 Pn

1 to 100 in steps of 0.1 secs

Either / Both

Enable / Disable

123 - 132

0 to 5 in steps of 0.5 secs

Either / Both

Enable / Disable

0.05 to 2 secs in steps of 0.01 secs

Enable / Disable

40 kW - 1600 kW

10 kW - 1000 kW

Enable / Disable

Enable / Disable

PICKUP

DELAY

MODE

FUNC

PICKUP

DELAY

FUNC

PICKUP

DELAY

RSTSET

MODE

FUNC

PICKUP

DELAY

RSTSET

MODE

FUNC

PICKUP

DELAY

DRPOFF

MODE

FUNC

PICKUP

DELAY

DRPOFF

MODE

FUNC

PICKUP

DELAY

MODE

FUNC

PICKUP

DELAY

MODE

FUNC

DELAY

FUNC

PICKUP

DELAY

i -Discrimination

FUNC

0.8 In

1 second

Alarm

Disable

0.2 In

2.0 secs

Disable

1.2 Vn

5.0 secs

0.95 Vs

Alarm

Disable

0.6 Vn

1 second

1.02 Vs

Alarm

Disable

48.0Hz

59.0Hz

0.2 secs

0.1Hz

Alarm

Disable

52.0Hz

61.0Hz

0.2 secs

0.1Hz

Alarm

Disable

0.2 Pn

2.0 secs

Alarm

Disable

123

2 secs

Alarm

Disable

1.0 second

Disable

100 kW

10 kW

Disable

Disable

Parameter Screen Abbreviation

Details Factory Settings

Additional Protections

7

Metering

# Requires SR71-PM module

Current

Voltage#

Frequency #

Power Factor #

Power #

Energy #

Harmonic-Current

Harmonic-Voltage #

Display

Imax

%Load

V

Vph-Vph

F

PF

kW

kVAr

kVA

kW

kWh

kVArh

kVAh

I1HAR

I2HAR

I3HAR

V1HAR

V2HAR

V3HAR

I

Maximum running Current per Phase

Percent Loading

Phase-Neutral

Phase-Phase

System Frequency

System Power Factor

Active Power per Phase and Total (kW)

Reactive Power per Phase and Total (kVAr)

Apparent Power per Phase and Total (kVA)

Maximum Demand (kW)

Total Active Energy (kWh)

Total Reactive Energy (kVArh)

Total Apparent Energy (kVAh)

R-Phase Current Harmonics

Y-Phase Current Harmonics

B-Phase Current Harmonics

R-Phase Voltage Harmonics

Y-Phase Voltage Harmonics

B-Phase Voltage Harmonics

High Resolution Backlit LCD

Phase, Earth and Neutral

Screen AbbreviationParameter Details

Additional Features

8

Screen Abbreviation

In Multiplier

Protocol

Link used

Self-Diagnostic Test

Comunication Module (SR71-COM)

Power Supply Module (UN-PS)

Power Metering Module (SR71-PM)

Relay Module (SR71-REL)

Parameter

P

P

P

P

P

P

P

P

P

LED Indications

Auxiliary Supply

Digital Inputs

Output Relays

Rating Plug

Communication

Maintenance Indication

Event Records (128)

Trip Records

Testing

Supplementary Modules

No. of Storable Settings

Auxiliary Power ON

Overload

Short Circuit

Instantaneous

Earth Fault

Neutral Fault

Trip

Alarm

24V DC

4 Nos.

3 Internal + 4 External Relays

240V AC / 5A, 30V DC / 5A (resistive load)

630-800-1000-1250-2000-3200-5000

MODBUS RTU

RS 4852I t based

Last 5 records with date and time stamping,

2

MODBUS RTU using RS485

Input:26V to 60V DC, 90 to 300V AC/DC Output:24V DC

240V AC, 415V AC

4 Relay Outputs (Breaker OPEN, Breaker CLOSE, Pre

Trip alarm and MD Exceed)

Details

Pick-up, Alarm, Trip, Date, Time and Cause of Event,

voltage and current readings in all phases

lSelf-powered

l

l

lSwitchable thermal memory takes care of residual heat in case of

repetitive overloads

lMulti-state LED to indicate

- Power ON condition

- Test mode

lIndividual fault annunciation through LEDs

& true RMS sensing

Inbuilt Zone Selective Interlocking (ZSI)

Provision for Self-diagnostic test(without tripping the breaker)

Provision for l AN1 module for remote fault indication through LEDs with

changeover contact for each kind of fault

lDirect tripping of breaker-reliable tripping with minimum time delay

lTest kit available for testing the release (SRT-2)

lRealistic hot and cold curves which take into account integrated heating

effect

lConformance to EMI/EMC standards

In 3 phase, 4 wire system, Neutral CT is required for ground fault protection.

Protection releases

Ir - 0.5 to 1.0 times In

Steps : 0.50, 0.60, 0.65, 0.70,

0.75, 0.80, 0.85, 0.9, 0.95, 1.00

0.2 to 30 sec. at 6 times Ir

Steps : 0.2, 0.5, 1, 1.5, 2, 3.5,

6, 12, 17, 30 Sec

Pickup Current Time Delay

Setting Range

9

Microprocessor Based Release - SR21i

Salient Features

Type ofProtection

Test-kit SRT-2

lTest-Kit for SR18/SR18G/SR21i Releases

l Operates from 230V AC supply & generates single-phase voltage test signals

l Tests the release for

- Phase fault i.e. for long time, short time and instantaneous protection

- Ground fault protection

l Test current multiples

- For phase faults: 2.5 In, 4.5 In, 6.5 In, 9.5 In, 11 In, 13 In

- For ground fault: 0.25 In, 0.35 In, 0.45 In, 0.55 In

l Five 7-segments LED display indicates the trip time (two places after

decimal)

Salient Features

Long Time

Short Time

Instantaneous

Ground Fault*

20 ms to 600 ms

Steps : 20, 60, 100, 160, 200,

260, 300, 400, 500, 600 ms

100 to 400 ms

Steps : 100, 200, 300, 400 ms

& OFF

2 to 10 times In

Steps : 2, 3, 4, 5, 6, 7, 8, 9, 10

2 to 16 times In

Steps : 2, 3, 4, 6, 8, 10, 12,

14, 16, OFF

0.2 to 0.6 times In

Steps : 0.2, 0.3, 0.4, 0.5, 0.6

-

Microprocessor Based Release - SR18 & SR18G

* Available in SR18G release only In 3 phase, 4 wire system, Neutral CT is required for ground fault protection.

lSelf-powered

lComprehensive protection

- SR18; Long Time and Short Time

- SR18G; Long Time, Short Time and Ground fault protection

lTrue Hot & Cold characteristics

lMulti-state LED to indicate

- Power ON condition

- Test mode

lIndividual fault annunciation through LEDs

lTest kit (SRT-2) available for testing the releases

lConformance to EMI/EMC standards

& true RMS sensing

& switchable thermal memory

AN1 module for remote fault indication through LEDs with changeover contact

for each kind of fault

lProvision for Self-diagnostic test (without tripping the breaker)

l

Protection releases

10

Ir - 0.5 to 1.0 times In

Steps : 0.50, 0.60, 0.65, 0.70,

0.75, 0.80, 0.85, 0.9, 0.95, 1.00

2 to 10 times In

Steps : 2, 3, 4, 5, 6, 7, 8, 9, 10

6 & 12 In

0.2 to 0.6 times In

Steps : 0.2, 0.3, 0.4, 0.5, 0.6

Pickup Current Time Delay

Setting Range

2.5 sec at 6 time s Ir

20 to 600 ms

Steps : 20, 60, 100, 160, 200,

260 , 300, 400, 500, 600 ms

-

100 to 400 ms

Steps : 100, 200, 300,

400 ms & OFF

Type ofProtection

DN1 thermo-magnetic release offers reliable protection against overload, short circuit and ground faults via multitap Cts. with ambient temperature compensation

0 0from -5 C to 50 C.

Thermo-magnetic Release Type - DN1

Overload Protection

lUnique individual phase O/L setting adjustment helps to avoid the nuisance tripping of

ACBs in unbalance load condition (due to single phase loads) on distribution

transformer. Long time pick-up range: 0.75 to 1 times In

Short Circuit Protection

lTwo taps on CTs (working as rating plug) help in selecting operating threshold.

Short-time pickup range: 5.5 to 7.5 times In with minimum impulsion time of 25ms

to prevent nuisance tripping due to transients

Ground Fault Protection

lOffered with auxiliary earth fault release module. Ground-fault pick-up range: 0.2 to

0.5 times In

Salient Features

Protection

Long Time

Short Time

Instantaneous

Ground Fault*

Current Multiples ( x Ir)

Tri

p T

ime

(s

)

30 sec24 sec

18 sec

12 sec

6 sec

4 sec

2 sec

1 sec

0.5 sec

1.5 2 3 4 5 6 9

0.01

10

100

1

1000

10,000

Protection Characteristic

Overload Curve (SR71)

2Short Circuit - I t ON (SR71)

Tri

p T

ime

(s

)

Current Multiples ( x In)

0.3

0.2

0.1

0.4

0.02

0.6

1.0

1.5

2.0

3.0

4.0

6.0

8.0

9.0

10.0

0.01

0.1

10

100

0.05

1

1000

10,000

0.1 1 10 50

11

Tolerance:Trip Time: ±20%


Tri

p T

ime

(s

)


Tri

p T

ime

(s

)

1.5

2.0

3.0

4.0

6.0

8.0

2Short Circuit - I t OFF (SR71)

Instantaneous (SR71)

0.01

0.1

10

100

1

1000

10,000

0.05 0.1 1 10 50

12

9.0

10.0

1.0

0.1

0.6

0.3

0.4

0.2

2.0

3.0

4.0

5.0

6.0

8.0

10.0

16.0

0.05 0.1 101 50

10.000

1000

100

10

1

0.1

0.01


Tri

p T

ime

(s

)


0.01

0.1

10

100

0.05

1

1000

10,000

0.1 1 10 50

0.01

0.1

10

100

1

1000

10,000

0.05 0.1 1 10 50

2Earth Fault - I t ON (SR71)

0.4

2.40.8

0.2

0.6

0.3

0.5

0.4s

0.1s

2Earth Fault - I t OFF (SR71)

Tri

p T

ime

(s

)

13

0.30.4

0.5

0.4s

0.3s

0.2s

5.0

0.6

0.2

0.1s

1.0



0.01

0.6

0.5

0.4

0.3

0.2

0.1

1 2 3 4 5 6 7 8 9 10 20 100

2 100.6

0.5

0.4

0.3

0.26

0.2

0.16

0.1

0.06

0.02

Tri

p T

ime

(s

)


14

0.1

0.01

1 1.2 1.5 222

1

10

100

1000

10000

30

17

6

12

3.5

2.0

1.5

1.0

0.5

0.2

3 4 5 6 7 8 9 10

Tri

p T

ime

(s

)

Overload (SR21i)

Short Circuit (SR21i)




Tri

p T

ime

(s

)

1000

100

10

1

0.1

1 1.2 2 3 4 5 6 7 8 9 10 201.5

Overload (SR18/18G)

1

0.1

0.01

0.1

0.2

0.3

0.4

0.2 0.6

1 10 100


Tri

p T

ime

(s

)

15

Ground Fault (SR21i)

0.1


0.2 0.6

0.4

1

0.1 0.1

0.1

0.01

100101

0.2

0.3


Tri

p T

ime

(s

)

Short Circuit (SR18/18G)

0.1

0.6

0.5

0.4

0.3

0.2

0.012 3 4 5 6 7 8 910 20 100

0.02

0.06

0.1

0.6

0.5

0.4

0.3

0.26

0.2

0.16

1

2 10

1

Tri

p T

ime

(s

)

Ground Fault (SR18G)

16



17

Time-current (DN1)

Tri

p T

ime

(s

)


1.05

1.2} Operating Limits

Thermal

Zone of Short Circuit Operation (M1/M2)

25ms

DN1

Total Operating TimeMin. Impulsion Time

M1

M2

0.7 1 2 3 4 5 678910 20 304050 100 400 1000

10000

1000

100

10

0.01

0.40.3

0.2

0.1


Wiring Diagram

18

Fo

r S

R2

1i r

ele

ase

(P

&C

un

it)

SI, S

OG

I, G

OG

i dis

crim

ina

tion

i dis

crim

ina

tion

Sh

ort

circu

it i/p

& o

/pG

rou

nd

fa

ult

i/p &

o/p

Gro

un

d

As

pe

r o

rde

r/re

qu

ire

me

nt

Th

e a

bo

ve d

raw

ing

is fo

r E

DO

bre

ake

rs.

1)

Fo

r M

DO

/MF

ve

rsio

ns

R

ef n

o. 3

, 1

0, 11

are

no

t a

pp

lica

ble

E

, B

, C

, D

, A

, 1

5 a

re a

pp

lica

ble

on

ly in

ele

ctrica

l bre

ake

rs.

2)

Fo

r E

F v

ers

ion

s T

he

re

f. n

o.

are

pro

vid

ed

as

pe

r cu

sto

me

r re

qu

ire

me

nt.

12

, 1

3, 1

4, 1

5, 1

6, 1

7, 1

8, 1

9, 2

0, 2

1

FC

A L

imit s

witch

(Sh

ow

n in

bre

ake

r re

se

t co

nd

itio

n)

R E

co

no

my R

esis

tor

C11

L

imit s

witch

op

era

tes w

he

n c

losin

g e

lectr

om

ag

ne

t is

he

ld o

nC

6 ‘S

erv

ice

’ po

sitio

n m

icro

sw

itch

fo

r w

ith

dra

wa

ble

circu

it b

rea

ke

rs(s

ho

wn

in

‘te

st’

po

sitio

n)

Ma

inC

ircu

it

Re

f n

o.

Pro

tect

ion

&C

on

tro

l U

nit

1

Au

xN

C 2

Sh

un

tre

lea

se

3

Au

xN

C 4

Au

xN

O 5

Au

xN

C 6

Au

xN

O 7

Au

xN

C 8

Ne

utr

al

C.T

.

12

U/V

rele

ase

13

Clo

sin

gP

reve

nte

r

14

Sp

rin

gC

ha

rgin

gIn

dic

atio

n

15

Co

mm

on

fau

ltIn

dic

atio

n

16

Se

pa

rate

fau

ltIn

dic

atio

n

17

Sh

un

ttr

ipIn

dic

atio

n

18

Un

de

rvo

lta

ge

Ind

ica

tion

19

Ele

ctrica

la

nti-

pu

mp

ing

20

((

((

((

(( 42

41

4241

F5

25

5

((H

((B8

8

((50

(

((

((

((

((1

(( 8281

NC

T

14

13

1211

109

86

2L

oa

d

75

MV

CP

(( 40

43

Internal Wiring

(

EA

/E

A1

xx

xx

NR

YB

DN

1/S

R1

8/S

R1

8G

SR

21

i/SR

71

((

81

82

CA-1

73 (

(

(

(

(

(

(

(

(

75

74

70

72

71

E9

08

9

an

tip

um

pin

g

Ele

ctr

icC

ha

rgin

gD

evi

ce

11

((( ( DC H F

EC

D

Internal Wiring FCA

Au

xN

O 9

(( 16

15

Clo

sin

gC

oil

10

(

A

((

B

E

CC

Only for DCC6

C11

R

21

Mic

ro s

witc

h

for

gro

un

d

fau

lt in

DN

1

rele

ase

It is possible to provide ‘Mechanical Interlock’ between two breakers of the same or different ratings in vertical or horizontal configurations. Mechanical interlock is available for ACBs up to 4000A. Mechanical

interlocking for ACBs in vertical configuration can be provided by links or

by flexible cables. Same for horizontal configuration can be provided by flexible cables.

Mechanical Interlock

Mounted in place of normal trip push button. With this, ACB can be locked in trip condition. For interlocking, LTPBs are offered in the following

combinations:

l4 different types of keys i.e. AA, BB, CC and DD suitable for

lCombination of L, M, N, LM and MN locks, which are suitable for lCombination of K, L, M, N, KL, LM and MN locks, which are suitable for

lCombination of J, K, L, M, N, JK, KL, LM and MN locks, which are

suitable for

2 I/C & 1 B/C schemes




Lockable Trip Push Button (LTPB)

Type

Locking in Isolated Position (LIP)

The facility of locking the ACB in Isolated position is available in Drawout

ACBs. This is useful to achieve interlocking between Main & Standby source. Similar lock is available as LOCK IN ANY POSITION.

Door Interlock

This ensures:

lUnless the panel door is closed, breaker cannot be racked in or outlUnless the breaker is in Isolated Position, it is not possible to open the

panel door

Racking Interlock

This ensures that breaker cannot be racked in/out unless the ACB is in tripped/open condition.

DoorInterlock

RackingInterlock

Locking in‘Isolated’Position

View of the Cradle

Data

Accessories

19

Accessories

DataType

Separate indication of tripping due to overload, short circuit and ground faults.

For release type DN1, this is provided by micro-switch C1 & C2 (C2 fitted inside release)

l

C2

Remote indication of tripping due to overload, short circuit and ground faults.l

lIndividual fault indication provided by three separate LEDs for

- Long time faults

- Short time fault/instantaneous fault - Ground fault

- One potential free contact rated 5A at 230V AC available for

each type of fault

lFlush mounting on panel (H-W-D=92mm x 46mm x 105mm)

lOperating voltage: 240V AC

Can be used with releases type SR18/SR18G/SR21i

AN1-Annunciator Module

C5

Indication for operation of shunt release or undervoltage

release.

Provided by micro-switch C5 fitted on the shunt release

l or

undervoltage release

Common indication of tripping due to overload, short circuit

and ground faults.

Provided by micro-switch C1 fitted inside the ACB Available as an option in all releases

l

l

C1

20

Accessories

l

time delay

Notes: When undervoltage

release is provided, the ACB can

be closed only when supply is

available to the undervoltage

release.

Type MV With no intentional

Data

l

breakerlShunt release coil is short time

rated and is disconnected from

the circuit by an auxiliary

contact when the ACB trips (Refer to wiring diagram)

lLow power consumption

l Two types available:

- EA for DC application - EA1 for AC application

For remote tripping of the Shunt Release

Undervoltage Release

Type

Typeof

Release

Rated Operational

voltage (Ue)

Powerconsum-ption at pick-up

Operation Limit

EA1240 A415 AC

24V DC48V DC110 DC220 DC

C 800 VA800 VA

32 W125 W45 W30 W

Note : Other voltages available on request

10-130%Ue

65-130%Ue

Technical Data

Rated Operationalvoltage (Ue)

Pick up (V)

Drop OFF (V)

Consumption

Watt loss

(VA)

240V & 415V: 50Hz220V & 415V: 60Hz

80% Ue

35-65% Ue

Pick up - 23 VAHold on - 10 VA

6 W

Parameter Specification

Two combinations available:

l2 NO + 2 NC

l6 NO + 6 NC

Auxiliary Contacts Electricalcircuit

Resistive

Non-resistive

Voltage(V)

Rated current (A)

# L/R = 15ms with two contacts in series

161.2

161.0 #

24 to 415 AC250V AC

24 to 415 AC250V AC

Closing Release Closing release remotely closes the circuit breaker if the mechanism spring is already charged.

Rated operational

voltage(Ue)

Power consumption

Range of operation

110V AC

240V AC

220V AC

Pick-up Hold-up

110V DC

220V DC

320VA

300W

50VA

50W

85-110% Ue

Spring charging Motor Electrical charging device automatically charges the mechanism spring of the circuit-breaker. After circuit-breaker closing, the geared motor immediately recharges the closing spring. Thus instantaneous reclosing of the circuit-breaker is possible following opening operation.

Rated operational

voltage(Ue)

Power consumption

Range of operation

240V AC

110V DC

220V DC

320VA

154W

85-110% Ue

24V DC 350W 50W

21

EA

Overall Dimensions

22

Note : All Dimensions are in mm.

Rating Type

400E -1250E

1600/2000E

X

5

15

Y

150

140

For Metallic Components

To RemoveArc Chute

DoorBezel2

00

min

10

0 m

in

9

340 min

20 min

For Insulating Sheet

14

0 m

in

7

27

38

5

33

22

30 35

20

230

301

4052.6 min

86

27

54

10

68

.82

56

Earthing Terminal

2 Holes 6.3-Ø

FE DD E

For 800A to 2500A 3P/4P C/H & 630A to 1600A 3P/4P S1

36 min 36 min

A

26 58 264 26

1630

939

4

21 16

10

4

40 min 40 min+1.0316

58 102 102 56

32

5

28

6

20

22 137.5

179.5

32 20

4 HolesØ12

38

5

X

X

Y

22

7

20 min

23.5

340 min

Insulator

10

0 m

in

216

298

402 21

For CN-CS...E 400A-2000A 3P

Dimensions (mm)RatingsCN - CS

A

326

414

482

628

D

57

56

83

82

E

102

98

154

150

F

-

98

-

156

630A

800/1000A

1250/1600A

630A

1250/1600A

2000/2500A

800/1000A

2000/2500A

3P

3P

3P

4P

4P

4P

3P

4P

S1

C/H/S1

C/H/S1

C/H/S1

C/H/S1

S1

C/H

C/H

Fixed Breakers

Overall Dimensions

23

Bezel Fixing Plan for all Fixed Breakers

BezelDoor Drilling forBezel Fixing Plan

Door Cutout

Hinge

32

5

A

11 min 59 294 15 min

Hinge

Terminal

400 to 2000E, 800/1000/1250/1600C/H & 630/800/1000/1250/1600S1

30 15

12.525

50

2 Holes- 13Ø

2000/2500C/H

30 15

2525 50

100

3 Holes- 13Ø

Terminal for 1600 S1 & 1250/1600/2000/2500 C/H

15

15

22

7

14

0

23.5

Terminal for 800/1000 C/H & 1250 S1

10

10

22

7

14

5

23.5

Terminal for 800/1000 S1

8

8

22

7

14

7

23.5

Terminal for 630 S1

5

5

22

7

15

0

23.5

332

36

3

5.5

305

10112 Holes- 4Ø

112

112

112

Terminal Connections

Fixed Breakers


Note:A = 89 for 4000CA = 91 for otherfixed ACBs

For 630A to 3200A C/H/S1 3P/4P, 3200H1/4000H 3P/4P

A

122

26494.5

40

4

6

199.5

46

8

D E F E D

64.5 Earthing Terminal

*Terminal For 630/800/1000 C/H/S1, 1250/2500S1 & 2000C/H


For Insulating Sheet380 min

40 max

40 64.5

*5

39

7.5

46M 10

4

6538

10

0 m

in

DoorBezel

Service Position

51 Test Position

75 Isolated Position

17.5 min.

18.9 max.

8.9 min. 18 245

20

74 28 1

60

26

20

0 m

in

7

10 54

68

.82

56

*Terminal for for 3200S1

25

65

*Terminal for1250/1600/2500C/H& 800/1000H

5

40

15

30

8.5

22

1.5

22

1.53

08

.5

*Terminal for3200H0/H1 & 4000H0/H

15

15

22

1.53

08

.5

60

Dimensions (mm)RatingsCN - CS

630/800/1000A

2000A

1250/1600A

630/800/1000A

2000A

1250/1600A

2000/2500A

2500/3200A

2000/2500A

2500/3200A

3200A

4000A

3200A

4000A

3P

3P

4P

4P

3P

4P

3P

3P

4P

4P

3P

4P

3P

4P

A

399

487

D

97.5

96.5

E

102

98

F

-

98

C/H/S1

S1

C/H/S1

S1

C/H

S1

C/H

S1

H0/H1

H0/H

H0/H1

H0/H

C/H/S1

C/H/S1

555

701

701

909

123.5

122.5

148.5

151.5

154

150

202

202

-

156

-

202

Overall Dimensions

24

Drawout Breakers


Overall Dimensions

25

Flat Terminal Connections

800 - 1000C & 630 - 1250S1 2000C

2500C/H & 2000H 2500S1

For 5000C/6300C 3P/4P

A

124

96.5 264

6

199.5

40

4

DoorBezel

10 546

8.8

25

6

7

D E F E D

68

3

42

64.5Earthing Terminal

20

106

3333

43

67

12

6 Holes- 14Ø

20

106

3333

43

67

12

6 Holes 14-Ø

38

62

12.5

4 slots

8.5 x 9.5

25

10.2

38

58

.4

8.5

50

6 Holes 14-Ø

160

25 25 25 25 25

17.5

25

507

0

12

.5

Terminal Connections5000C/6300C

28

17.5

40 50 40 43.5

63

217

8 Holes- 14Ø

19

63

4 Slots

8.5 x 9.5

25

10.2

38

58

.4

8.5

800 - 1000H, 1250/1600C/H & 1600 - 2000S1

6 Slots

8.5 x 9.5

100

30

38

58

.4

10.2

8.5

30

20

3200S1 3200H0/H & 4000H0/H1


400 minFor Insulating Sheet

Service Position

Test Position

Isolated Position

20 max

102

10

0 m

in

20

0 m

in

46

7

46M 10

10

5

5

615

17.5 min18.9 max.

8.9 min. 18 245

20

7428 1

60

26

75

51

A D E

5000A

6300A

5000A

6300A

C 3P

C 3P

C 4P

C 4P

913

913

1182

1182

187.5

187.5

187.5

187.5

269

269

269

269

F

-

-

269

269

RatingsDimensions (mm)

106

Drawout Breakers


6 Holes- Ø14

Overall Dimensions

26

For Horizontal Mounting of all Draw-out Breakers

Bezel Fixing Plan for all Draw-out Breakers

For 5000C/6300C 3P/4P

25

50

108.5

184.5

25

10 Holes- 11Ø592

522

Door Cutout

Hinge

A20.5 min 294 5 min

Hinge

Base ofCradle

1

41

2

5.5

6 Holes- 4Ø

19

92

24

305 332

45

0

37

24

Front

48120

64.1

*G

107.5 367.5 40

24

10 Holes- 11Ø

For 630A to 3200A C/H/ S1 3P/4P 3200 H0/H1, 4000 H0/H 3P/4P

Note: For 4000A C 3P/4P, 5000C/6300C ACB, A = 81.5 For other Drawout Breakers A = 79.5

3P/4P

800A - 1600A

630A - 2000A

800A - 1600A

630A - 2000A

2000 / 2500A

2000 / 2500A

2500 / 3200A

2500 / 3200A

3200A

3200A

4000A

4000A

5000 / 6300A

5000/ 6300A

3P

3P

4P

4P

3P

4P

3P

4P

3P

4P

3P

4P

3P

4P

C/H

S1

C/H

S1

C/H

C/H

S1

S1

H0 / H1

H0 / H1

H0 / H

H0 / H

C

C

280.3

280.3

368.3

368.3

436.3

582.3

436.3

582.3

582.3

790.3

582.3

790.3

863

1132

RatingsG

(mm)Type

Mounting Details


Door Drillingfor Bezel Fixing Plan

Bezel

Overall Dimensions

27

Terminals

Note : 1) All Dimensions are in mm. 2) Consult us for other Terminal Orientations.

Horizontal Terminals

800 - 1000C 1250 - 1600C/H& 800/1000H

2000C 2500C/H& 2000H

80 80 80

1510

10

15

30

8.5

22

1.5

80

Rear Side

Side View Rear View

V

U

O P4 Holes T-Ø

NM

40.0

R

38

7.5 X

22

1.5

30

8.5

S W

25

25

25

12.5 25

10

0

12

.5

4 Holes 14-Ø 6 Holes 14-Ø

20

16

0 33

33

12 43

12.5

12

.5

50

25

25

2 Holes- 14Ø

63

3 Holes 14-Ø

15

16

.5

12.5 30

16

.5

Top

Vertical Terminals

Ratings M N P Q R S T U V W X

630-1250 S1 & 800-1000 C

1600-2000 S1 & 1250-1600 C/H

800-1000 H

2500 C/H

2000 H

2000C

10.2

20

20

20

38

40

40

40

20

20

20

20

25

25

40

40

29.2

29.2

29.2

33.5

5

5

22.5

7.5

9

9

14

14

65

65

80

80

95

95

110

110

10

10

15

15

58.4

80

80

80

U

P

S

60

22

1.5 3

08

.5

V

XM

N

QR

ØT

W1

5

Ratings M N P Q R S T U V W X

3200 H1/H0 & 4000 H0 30 100 45 40 29.5 95 14 80 140 15 160

The dimensions for and are as under:3200 H1/H0 4000 H0

Overall Dimensions

Terminals

Vertical Terminals

28

Note : 1) All Dimensions are in mm. 2) Consult us for other Terminal Orientations.

SP 50437 R5Registered Office: L&T House, N. M. Marg, Ballard Estate, Mumbai 400 001, INDIA

Khairasol, Degaul AvenueDurgapur 713 212Tel: 2559848, 2559849, 2559844Fax: 0343-2553614e-mail: [email protected]

5, Milanpur Road, Bamuni MaidanGuwahati 781 021Tel: +91 8876554410 / 8876554417Fax: 361-2551308e-mail: [email protected]

II Floor, Vasantha Chambers5-10-173, Fateh Maidan RoadHyderabad 500 004Tel: 040-67015052Fax: 040-23296468e-mail: [email protected]

Monarch Building, 1st FloorD-236 & 237, Amrapali MargVaishali NagarJaipur 302 021Tel: 0141-4385914 to 18Fax: 0141-4385925e-mail: [email protected]

Akashdeep Plaza, 2nd FloorP. O. GolmuriJamshedpur 831 003JharkhandTel: 0657-2312205 / 38Fax: 0657-2341250e-mail: [email protected]

Skybright Bldg; M. G. RoadRavipuram Junction, ErnakulamKochi 682 016Tel: 0484-4409420 / 4 / 5 / 7Fax: 0484-4409426e-mail: [email protected]

3-B, Shakespeare SaraniKolkata 700 071Tel: 033-44002572 / 3 / 4 Fax: 033-22821025 / 7587e-mail: [email protected]

A28, Indira Nagar, Faizabad Road Lucknow 226 016Tel: 0522-4929905 / 04Fax: 0522-2311671e-mail: [email protected]

No: 73, Karpaga Nagar, 8th StreetK. PudurMadurai 625 007Tel: 0452-2537404, 2521068Fax: 0452-2537552e-mail: [email protected]

EBG North Wing Office-Level 2 Gate 7, Powai CampusMumbai 400 072Tel: 022-67052874 / 2737 / 1156Fax: 022-67051112e-mail: [email protected]

12, Shivaji NagarNorth Ambajhari RoadNagpur 440 010Tel: 0712-2260012 / 6606421Fax: 2260030 / 6606434e-mail: [email protected]

32, Shivaji Marg P. O. Box 6223New Delhi 110 015Tel: 011-41419514 / 5 / 6Fax: 011-41419600e-mail: [email protected]

L&T House P. O. Box 119 191/1, Dhole Patil RoadPune 411 001Tel: 020-66033395 / 66033279Fax: 020-26164048 / 26164910e-mail: [email protected]

Crystal Tower, 4th Floor, G. E. RoadTelibandhaRaipur - 492 006Tel: 0771-4283214e-mail: [email protected]

3rd Floor Vishwakarma ChambersMajura Gate, Ring RoadSurat 395 002Tel: 0261-2473726Fax: 0261-2477078e-mail: [email protected]

Radhadaya ComplexOld Padra RoadNear Charotar SocietyVadodara 390 007Tel: 0265-6613610 / 1 / 2Fax: 0265-2336184e-mail: [email protected]

48-8-16, DwarakanagarVisakhapatnam 530 016Tel: 0891-6701125 to 30Fax: 0891-6701139e-mail: [email protected]

Product improvement is a continuous process. For the latest information and special applications, please contact any of our offices listed here.

Electrical Standard Products (ESP) Branch Offices:

REGISTERED OFFICE AND HEAD OFFICEL&T House, Ballard EstateP. O. Box 278Mumbai 400 001Tel: 022-67525656Fax: 022-67525858Website: www.Larsentoubro.com

ELECTRICAL STANDARD PRODUCTS (ESP)501, Sakar Complex I Opp. Gandhigram Rly. Station Ashram RoadAhmedabad 380 009Tel: 079-66304006-11Fax: 079-66304025e-mail: [email protected]

38, Cubbon Road, P. O. Box 5098Bangalore 560 001Tel: 080-25020100 / 25020324Fax: 080-25580525e-mail: [email protected]

131/1, Zone IIMaharana Pratap NagarBhopal 462 011Tel: 0755-3080511 / 05 / 08 / 13 / 17 / 19 Fax: 0755-3080502e-mail: [email protected]

Plot No. 559, Annapurna ComplexLewis RoadBhubaneswar 751 014Tel: 0674-6451342, 2436690, 2436696Fax: 0674-2537309e-mail: [email protected]

SCO 32, Sector 26-D Madhya Marg, P. O. Box 14Chandigarh 160 019Tel: 0172-4646840, 4646853Fax: 0172-4646802e-mail: [email protected]

L&T Construction CampusTC-1 Building, II FloorMount-Poonamallee RoadManapakkamChennai 600 089Tel: 044-2270 6800Fax: 044-22706940e-mail: [email protected]

67, Appuswamy RoadPost Bag 7156 Opp. Nirmala CollegeCoimbatore 641 045Tel: 0422-2588120 / 1 / 5Fax: 0422-2588148e-mail: [email protected]

Larsen & Toubro Limited Electrical Standard ProductsPowai Campus, Mumbai 400 072Customer Interaction Center (CIC)BSNL / MTNL (toll free) : 1800 233 5858Reliance (toll free) : 1800 200 5858Tel : 022 6774 5858, Fax : 022 6774 5859E-mail : [email protected] Website : www.LNTEBG.com

Salient features:

Unique breaker front-facia architecture displays the electrical

accessories equipped on the ACB (with rated control voltage

& type of operating voltage)

lSuperior safety features - arc chute interlock, smart racking

shutter, ready to close

lModular & snap-fit accessories such as UVR, SR, CR,

redefine the modularity on time scale of 5 mins.

lEase of on-site convertibility from Manual to Electrical &

Fixed to Draw-out version

lUnipolar, snap-fit control terminals for independent 2termination of 2 wires of up to 2.5 mm each

lON & OFF buttons can be independently padlocked to

prevent unauthorized access

lRacking shutter can be padlocked to prevent inadvertent

racking operation

lUpto 3 breakers can be mechanically interlocked using

bowden cable. The Interlock is suitable for fixed, draw-out or

a combination

l

lRight aligned design to offer better utilization of space,

especially in a multi-tier panel design

Breaking Capacities :

UW1-08 UW1-10 UW1-12 UW1-16 UW1-20 UW1-25

UW2-08 UW2-10 UW2-12 UW2-16 UW2-20 UW2-25 UW2-32

N : 50kA

S : 65kA

H : 80kA

S : 65kA

H : 80kA

H : 80kA

V : 100kA

Fra

me

-2F

ram

e-3

UW3-08 UW3-10 UW3-12 UW3-16 UW3-20 UW3-25 UW3-32 UW3-40 UW3-50 UW3-63

800A 1000A 1250A 1600A 2000A 2500A 3200A 4000A 5000A 6300A

Fra

me

-1

Icu = Ics = Icw

Salient features:

l2500A in Fr-1 & 6300A in Fr-3 are the world’s most compact

air circuit breakers in terms of width & volume

lCurrent rating from 400A to 6300A in 3 frames sizes

lAvailable in 3 Pole/4 Pole, Manually & Electrically operated,

Fixed / Draw-out version

lCommon Height & Depth all across the range

lHigh short time fault withstand capacity, Icu = Ics = Icw for

1 sec for total selectivity

lHigh mechanical and electrical operating life

lNeutral pole rating: 100% & 200%

lAvailable in both NRYB & RYBN configuration in 4 Pole ACBs

lIn-built Electrical & Mechanical Anti-Pumping

50%,

lComplete range conform to IS / IEC 60947-2 & IEC 60947-2

Shunt Release220-240V~

WP R

O L/

S/C

INST

EF

NTRL

L MA R

RT IP

OFF

OFF ON

A1

A2

Air Circuit Breakers 1

Rated current

UW-MTX 4.5

IONO

O

UW-RELRelay Output- 4 Prog. contacts of 240V/6A rating for closing, tripping, fault annunciation & maximum demand

UW-AOAnalog Output - 4 Analog output- Output Analog signals of 4-20mA/ 1-10 VDC

UW-TCSTrip Circuit Supervision- Monitors healthiness of Shunt Trip Circuit

UW-ELEarth Leakage Protection- Range 0.3 to 30A - Needs specified external CTs

UW-TMTemperature Rise Protection - Selectable temperature levels

0 (85 to 115 C)- Mounted inside breaker

0C

UW-Digital Input/OutputDigital I/O Module - 4 Isolated digital inputs - 4 Relay outputs

UW-ZSIZone Selective Interlocking - Intelligent discrimination for short circuit & earth fault

UW-REFRestricted Earth Fault Protection- Detects zone of Earth fault- Needs specified external CTs

UW-PSPower Supply (24VDC)- Available in 2 input versions (85-265VAC; 120-300 VDC)

CAN BUS

CAN BUS

O/P 1 O/P 2 O/P 3 O/P 4

MNT

COMM

PWR

T

RELAY

1 2 3 4

NODE

DIGITAL I/O

1 2 3 4

NODE

O/P 1 O/P 2 O/P 3 O/P 4

MNT

COMM

I/P 1 I/P 2 I/P 3 I/P 4 PWR

T

O/P 1 O/P 2 O/P 3 O/P 4

MNT

COMM

PWR

T

ANALOG O/P

S-OUT G-OUT S-IN G-IN

MNT

COMM

PWR

T

ZSI TCS

MNT

COMM

STATUS RELAY PWR

T

COMM ALARM MT.MODE PS

TEST

CURRENT DELAY MODE FREQT

REF EL

COMM ALARM MT.MODE PS

TEST

CURRENT DELAY MODE FREQT

Matrix Protection & Control Unit 2

UW-MTX 3.5/3.5EC

UW-MTX 4.5

UW-MTX 2.5/2.5G

UW-MTX 1.0/1G/1.5G

UW-MTX 4.5UW-MTX 3.5/3.5EC

UW-MTX 1.5G

UW-MTX 2.5G

UW-MTX 3.5EC

UW-MTX 4.5

UW-MTX 4.5

UW-MTX 4.5

Salient features:

wider viewing angle

Touch Screen technology to provide ease in navigation in

MTX 4.5

Local fault annunciation through LED indication & pre-trip

alarm

Trip & Event recording, Query button for last trip record

Front accessible test port

lEnergy monitoring & control through Energy

Management System

lSmart Card module for ease of parameterization

lOscillographs to display pre & post fault current &

voltage in MTX 4.5

lAvailable in versions: MTX 1.0/1G/1.5G,

MTX 2.5/2.5G, MTX 3.5/3.5EC & MTX 4.5

lUnique O-LED display for

l

lPluggable Communication & Power metering

modules for customization & future upgradation

lDual time-based protection set-groups & Password

protection

lSoft-rating plug for precise protection at lower load

currents

Protection against temperature rise through TM module

Switchable neutral overload protection (50% to 200%

in steps of 5%)

Advance protection - ZSI, TCS, REF, EL

lProvision for on-load self-diagnosis of releases

lModbus, Profibus & Zigbee communication protocols

lPower & Harmonics measurement

lEasy to integrate with HMI & PLC

lDirectional & Double Short-circuit protection

l

l

l

l

l

l

lProtection releases conform to EMI/EMC standard

Simulation kit:

l

l

l

l

l P&C Unit

l

l

l

lUniversal test kit for all versions of Matrix P&C Unit

Generates 3 phase current and voltage with adjustable phase angles

Graphical display & smart GUI with multi functional key operation

Portable & hand held device to simulate faults

Dual Power ON - battery & external supply

Auto sensing of connectivity

Memory card for data storage upto 32 GB

Stores 10 test records

PC interface through USB & Modbus

Air Circuit Breakers OMEGA

Matrix Protection & Control Unit 3

* - available as optional.For detailed information please refer product literature.

Overload - Phase

Overload - Neutral

Short Circuit

Directional Short Circuit

Instantaneous

Earth Fault

Current

Voltage

Frequency

Reverse Power

Maximum Demand

Last 5 Trip Data

Last 10 Event Data

Modbus

Profibus

Zigbee (wireless)

Trip Circuit Supervision (TCS)

Zone Selective Interlocking (ZSI)

Temperature Rise (TM)

Earth Leakage (EL)

Restricted Earth Fault (REF)

Relay Output

Load Management

Digital Input & Output

Analog Output

Current

% Loading

Voltage

Power & Energy

Harmonics

Basic Protection

Trip Records

Event Records

Smart Card

Communication

Advance Protection

Additional Features

Metering

Storable Settings (2 sets)

Features

Additional Protection

Parameter

P

P

P

P

P

P

P

P

P

P

P

P

P

P

P

P

P

P

P

P

P

*

*

*

*

*

*

*

*

*

*

*

*

MTX4.5

P

P

P

P

P

P

P

P

P

P

P

P

P

P

P

P

P

P

P

*

*

*

*

*

*

*

*

*

*

*

*

*

MTX3.5EC

P

P

P

P

P

P

P

P

P

P

P

P

*

*

*

*

*

*

**

*

*

*

*

*

*

*

*

*

*

*

*

MTX3.5

P

P

P

P

P

P

P

P

P

P

*

MTX2.5G

P

P

P

P

P

P

P

P

*

MTX2.5

MTX1.5G

P

P

P

P

P

P

MTX1G

P

P

P

P

P

MTX 1.0

P

P

P

Power Supply Module (24 VDC)

Frame0Rated uninterrupted current (In) (A) 50 C

Version

Rated operational voltage at 50/60 Hz

Rated insulation voltage at 50/60 Hz


Suitability for isolation

Degree of protection on breaker front

Pollution degree suitability

Utilization category

Compliance

Rating for 4th pole

Opening time (ms)

Closing time (ms)

Mechanical life

N

50

42

36

50

50

26

105

88

76

400-1600

S

65

55

50

65

65

36

143

121

105

2000

5000

6300 #

2000

$2500

5000

upto 690V

1000V

12kV (Main Circuit)

Yes

IP40 Intrinsic, IP54 Available

3

B

IS/IEC 60947 (Part-2), EN60947-2, IEC 60947-2

100% Icu

40

60

H

80

70

55

80

80

44

176

154

121

10000*

1

S

65

55

50

65

65

36

143

121

105

20000

20000

H

80

70

55

80

80

44

176

154

121

S

65

55

50

65

65

36

143

121

105

100% & 200%

H

80

70

55

80

80

44

176

154

121

S

65

55

50

65

65

36

143

121

105

Rated Ultimate S. C.Breaking Capacity

Rated Service S. C.Breaking Capacity

Rated Short TimeWithstand Capacity

Rated S. C. MakingCapacity

Electrical life

Ue

Ui

Uimp

400/415V

500/550V

660/690V

400/415V

500/550V

660/690V

0.5 sec

1.0 sec

3.0 sec

400/415V

500/550V

660/690V

Icu (kA)

Ics (kA)

Icw (kA)

Icm (kA)

with maintenance

with maintenance

without maintenance

H

80

70

55

80

80

50

176

154

121

3

50% & 100%

10000

10000

H

80

70

55

80

80

50

176

154

121

V

100

85

75

100

100

75

220

187

165

H

80

70

55

80

80

50

176

154

121

V

100

85

75

100

100

75

220

187

165

2

400-3200 400-5000

15000

15000

5000

# Dimensions for 100% N. Contact us for 50% N & 200% N.** Depth of Frame-3 ACB will be 10 mm additional with use of equalizer link.

(All dimensions in mm)

Technical details:

Dimensional details:

U-POWER Omega offers common depth (421 mm) and height (433 mm) across the entire range.

1

2

**3

Poles

3

4#

3

4#

3

4#

A

347

447

447

581

647

847

Frame

*8000 for 1600 N&S version.

0(A) 40 C.$ Please consult branch office for selection. # Rated uninterrupted current (In)

4 Air Circuit Breakers

43

3

A

7

Panel Door

16

Disconnected

35Test

421

25.5

43

3

OFFI

ONO

Khairasol, Degaul AvenueDurgapur 713 212Tel: 2559848, 2559849, 2559844Fax: 0343-2553614e-mail: [email protected]

5, Milanpur Road, Bamuni MaidanGuwahati 781 021Tel: +91 8876554410 / 8876554417Fax: 361-2551308e-mail: [email protected]

II Floor, Vasantha Chambers5-10-173, Fateh Maidan RoadHyderabad 500 004Tel: 040-67015052Fax: 040-23296468e-mail: [email protected]

Monarch Building, 1st FloorD-236 & 237, Amrapali MargVaishali NagarJaipur 302 021Tel: 0141-4385914 to 18Fax: 0141-4385925e-mail: [email protected]

Akashdeep Plaza, 2nd FloorP. O. GolmuriJamshedpur 831 003JharkhandTel: 0657-2312205 / 38Fax: 0657-2341250e-mail: [email protected]

Skybright Bldg; M. G. RoadRavipuram Junction, ErnakulamKochi 682 016Tel: 0484-4409420 / 4 / 5 / 7Fax: 0484-4409426e-mail: [email protected]

3-B, Shakespeare SaraniKolkata 700 071Tel: 033-44002572 / 3 / 4 Fax: 033-22821025 / 7587e-mail: [email protected]

A28, Indira Nagar, Faizabad Road Lucknow 226 016Tel: 0522-4929905 / 04Fax: 0522-2311671e-mail: [email protected]

No: 73, Karpaga Nagar, 8th StreetK. PudurMadurai 625 007Tel: 0452-2537404, 2521068Fax: 0452-2537552e-mail: [email protected]

EBG North Wing Office-Level 2 Gate 7, Powai CampusMumbai 400 072Tel: 022-67052874 / 2737 / 1156Fax: 022-67051112e-mail: [email protected]

12, Shivaji NagarNorth Ambajhari RoadNagpur 440 010Tel: 0712-2260012 / 6606421Fax: 2260030 / 6606434e-mail: [email protected]

32, Shivaji Marg P. O. Box 6223New Delhi 110 015Tel: 011-41419514 / 5 / 6Fax: 011-41419600e-mail: [email protected]

L&T House P. O. Box 119 191/1, Dhole Patil RoadPune 411 001Tel: 020-66033395 / 66033279Fax: 020-26164048 / 26164910e-mail: [email protected]

Crystal Tower, 4th Floor, G. E. RoadTelibandhaRaipur - 492 006Tel: 0771-4283214e-mail: [email protected]

3rd Floor Vishwakarma ChambersMajura Gate, Ring RoadSurat 395 002Tel: 0261-2473726Fax: 0261-2477078e-mail: [email protected]

Radhadaya ComplexOld Padra RoadNear Charotar SocietyVadodara 390 007Tel: 0265-6613610 / 1 / 2Fax: 0265-2336184e-mail: [email protected]

48-8-16, DwarakanagarVisakhapatnam 530 016Tel: 0891-6701125 to 30Fax: 0891-6701139e-mail: [email protected]

Product improvement is a continuous process. For the latest information and special applications, please contact any of our offices listed here.

Electrical Standard Products (ESP) Branch Offices:

REGISTERED OFFICE AND HEAD OFFICEL&T House, Ballard EstateP. O. Box 278Mumbai 400 001Tel: 022-67525656Fax: 022-67525858Website: www.Larsentoubro.com

ELECTRICAL STANDARD PRODUCTS (ESP)501, Sakar Complex I Opp. Gandhigram Rly. Station Ashram RoadAhmedabad 380 009Tel: 079-66304006-11Fax: 079-66304025e-mail: [email protected]

38, Cubbon Road, P. O. Box 5098Bangalore 560 001Tel: 080-25020100 / 25020324Fax: 080-25580525e-mail: [email protected]

131/1, Zone IIMaharana Pratap NagarBhopal 462 011Tel: 0755-3080511 / 05 / 08 / 13 / 17 / 19 Fax: 0755-3080502e-mail: [email protected]

Plot No. 559, Annapurna ComplexLewis RoadBhubaneswar 751 014Tel: 0674-6451342, 2436690, 2436696Fax: 0674-2537309e-mail: [email protected]

SCO 32, Sector 26-D Madhya Marg, P. O. Box 14Chandigarh 160 019Tel: 0172-4646840, 4646853Fax: 0172-4646802e-mail: [email protected]

L&T Construction CampusTC-1 Building, II FloorMount-Poonamallee RoadManapakkamChennai 600 089Tel: 044-2270 6800Fax: 044-22706940e-mail: [email protected]

67, Appuswamy RoadPost Bag 7156 Opp. Nirmala CollegeCoimbatore 641 045Tel: 0422-2588120 / 1 / 5Fax: 0422-2588148e-mail: [email protected]

Larsen & Toubro Limited Electrical Standard ProductsPowai Campus, Mumbai 400 072Customer Interaction Center (CIC)BSNL / MTNL (toll free) : 1800 233 5858Reliance (toll free) : 1800 200 5858Tel : 022 6774 5858, Fax : 022 6774 5859E-mail : [email protected] Website : www.LNTEBG.com

SP 50538 R3

air circuit breakers - baviskar sales & service, … release-dn1 l ... auto or manual reset...

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