acb manual

630 - 6300A220-415-690V AC / 250V DCIEC 60947-2 / IS 13947-2

TMTM

Controls & Switchgear Company Ltd.

TM

TM

C&

SC

B_

De

t/1

20

/PU

B/A

ails

50

7

Controls & Switchgear Company Ltd.

Webs i t e : www.con t ro l s i nd i a . comWebs i t e :

Central Marketing Office: Tel. : +91-11-4161 03509, , Fax: +91-11- , 2684 7342email : [email protected], [email protected]

3088 7520 - 29 2684 7341Central Marketing Office: Tel. : Fax:email :

Corporate Office : 222, Okhla Industrial Estate, New Delhi - 110 020Tel. : +91-11-3088 7520 - 29, Fax: +91-11-2684 7154, 2682 9063Corporate Office :Tel. : Fax:

International Business Division Tel. : +91-11-4161 3503, 3088 7520 - 29, Fax: +91-11-2683 8291, 2684 7342email : [email protected]

: : email :

DistributorDistributor

Section Contents PAGES

1. Introduction 4-7Salient features, internal & general appearance of Drawout ACB

2. Ratings & Specifications 8-11Free air & enclosed thermal current ratings for AC & DC applications & selectionof specifications

3. Multi-Function Protecion Devices 12-17Micro Processor Based over current trip device, Economical Thermal Magnetic &their accessories

4. Spring Charging Operations 18-19Manual & motor charging & accessories for closing operations

5. Electrical Tripping 20-21Shunt Trip, UVT & Control Devices

6. Type of Mounting 22-23Fixed, metal clad type, lifter, accessories for draw-out, safety shutter, position switch,S/C contacts, test jumper, mal-insertion prevention device

7. Other Accessories 24-26Aux. Switch, Key lock, Mechanical Interlock, Door Interlock, Lifter, carrying handle

8. Power Consumption 27Internal resistance, reactance & special environmental specifications

9. Clearance 28Clearance above Arc chute, maintenance space

10. Recommended Busbar Size 29Copper & Aluminium

11. Outline Dimensions 30-39Outline dimensions & Panel Mounting Details of D seriesACBs of 630A to 4000A & C series ACBs of 5000 to 6300A

12. Electrical Connection Diagram 40-41Interconnections between electrical accessories & tripping devices

13. Vertical Adapter Drawings 42Ratings 630-2500A

14. ACB Order Form 43ACB Order Form

4

General Appearance of Air Circuit Breaker (Type - AH-D Series)

8 type of Accessories for Drawout types, SafetyShutter, Position Switch, Test Jumper, Lifter, MalInsertion Prevention Device, Door Interlock withdefeat facility, Short Circuiting Contacts &Drawout position Padlock.

Vertical or horizontal bus bar connectionarrangement.

2, 3 or 4 Pole version available in all currentratings, in fixed & drawout execution.

Motor charging or manual charging, facilitatinglocal or remote control.

4 types of protection & trip devices:

a) Micro processor based RMS sensing over-current relay for industrial & generatorprotection.

b) Electromagnetic instantaneous trip device withthermal O/L Relay for S/C & O/L protectionfor AC system.

c) Undervoltage trip with or without time delayfor under voltage.

d) Making current release for safeguardingagainst closing of Breaker on S/C faults.

4 types of indication Switches, Auxiliary Switch,Trip Indication Switch, OCR Alarm Switch,Spring Charged Indication Switch.

Wide options of front panel fittings.

“C & S” Air Circuit Breakers are available in the current range of 630A to 6300A with“C & S” Air Circuit Breakers are available in the current range of 630A to 6300A with“C & S” Air Circuit Breakers are available in the current range of 630A to 6300A with“C & S” Air Circuit Breakers are available in the current range of 630A to 6300A with“C & S” Air Circuit Breakers are available in the current range of 630A to 6300A withwide choice of options & Accessorieswide choice of options & Accessorieswide choice of options & Accessorieswide choice of options & Accessorieswide choice of options & Accessories

1.0 Introduction

Introduction

5

Lightest and most compact for a given capacity.

Most simple to operate & maintain. Only ascrew driver a spanner required for replacingthe arcing contacts.

Only 4 frame sizes for entire range (630Ato 6300A), resulting in maximum interchangeability,commonality of parts and minimum inventoryof spares.

High breaking capacity, 50KA to 120KA andmaking capacity from 105KA to 264KA withline or load connected to upper or lowerterminals.

High speed operating Mechanism ensures atotal opening time of 30ms (including arcingtime of less than 10ms) and a total closingtime of 40m sec.

Neutral pole of 4 pole ACB is of same currentrating as of 3 pole.

Highest degree of system protection &coordination due to use of microprocessorbased protection release.

1.1 Salient Features

Internal Structure

Model: AH-6D, Draw-out, Motor Charging Type

S tored energy t ypeS tored energy t ypeS tored energy t ypeS tored energy t ypeS tored energy t ype1. Overcurrent trip device (Microprocessor based)2. Arc chutes3. Isolating contacts of control circuits4. Main circuit Terminals5. Draw out moulded base6. Main circuit terminals7. Isolating contacts of main circuits8. Fixed arcing contacts9. Moving arcing contacts10. Fixed main contacts11. Moving main contacts12. Closing mechanism13. Trip bar14. Inst. trip devices15. CT (for overcurrent trip device)16. Charging motor17. Closing latch release18. Closing spring19. Charging handle20. Quick close Slow close selector lever21. Auxiliary switches

Due to use of tungsten-silver sintered metalcontacts, high speed opening mechanism &electromagnetic instantaneous trip device, mostsuitable for capacitor switching & DCapplication.

High dielectric strength even in hot and humidconditions due to use of class ‘B’ and ‘F’insulating materials.

Comply with utilisation category B & pollutiondegree 3 Group I of IEC 947-Part I.

Can withstand impulse voltage of 8KV (peak),1.2/50 micro sec. wave as per case ‘A’ inhomogeneou s f i e l d c ond i t i on o fIEC 947-Part-I.

D-series Breaker fitted in Panel with door cutout meets IP42 protection.

Designed to provide continuous duty even inadverse environmental conditions.

Introduction

6

Introduction

1.2 Front Panel designed for the new Millennium

Rating Name Plate.Rating Name Plate.Rating Name Plate.Rating Name Plate.Rating Name Plate.

Charging Handle.Charging Handle.Charging Handle.Charging Handle.Charging Handle.

Close Open Cycle Counter (Optional).Close Open Cycle Counter (Optional).Close Open Cycle Counter (Optional).Close Open Cycle Counter (Optional).Close Open Cycle Counter (Optional).

D/O PD/O PD/O PD/O PD/O Position Indicatorosition Indicatorosition Indicatorosition Indicatorosition Indicator.....

Spring Charge IndicatorSpring Charge IndicatorSpring Charge IndicatorSpring Charge IndicatorSpring Charge Indicator.....

Close Open IndicatorClose Open IndicatorClose Open IndicatorClose Open IndicatorClose Open Indicator.....

Open POpen POpen POpen POpen Position Position Position Position Position Padlock (Optional).adlock (Optional).adlock (Optional).adlock (Optional).adlock (Optional).

Push to Close Button.Push to Close Button.Push to Close Button.Push to Close Button.Push to Close Button.

Push to Open Button.Push to Open Button.Push to Open Button.Push to Open Button.Push to Open Button.

Close PClose PClose PClose PClose Position Position Position Position Position Padlock (Optional).adlock (Optional).adlock (Optional).adlock (Optional).adlock (Optional).

Draw-out insertion Hole.Draw-out insertion Hole.Draw-out insertion Hole.Draw-out insertion Hole.Draw-out insertion Hole.

DrawDrawDrawDrawDraw-----out Pout Pout Pout Pout Position Position Position Position Position Padlock (Optional).adlock (Optional).adlock (Optional).adlock (Optional).adlock (Optional).

Castle Lock.Castle Lock.Castle Lock.Castle Lock.Castle Lock.

Key Lock.Key Lock.Key Lock.Key Lock.Key Lock.

D/O Operation Instruction nameplate.D/O Operation Instruction nameplate.D/O Operation Instruction nameplate.D/O Operation Instruction nameplate.D/O Operation Instruction nameplate.

PPPPPanel Gasket.anel Gasket.anel Gasket.anel Gasket.anel Gasket.

The front panel indicator provides Breakerposition indication:

"CONNECTED", "TEST" or

"ISOLATED"

The Panel Cutout Rubber Gasketprovides complete dust-proofprotection.

The shutter prevents errorneous insertion ofthe handle. This can be opened by loweringthe position stop release lever only when theBreaker is open.

When the Breaker is closed, the release levercan not be lowered. Thus, the shutter can notbe opened.

1111100000

1313131313

1212121212

1414141414

1616161616

1111111111

1212121212

1313131313

1414141414

1515151515

1616161616

Three Front Panel Cut-outs for entire range (630A to 6300A), help standardise your design

1111111111

1515151515

7

1.3 High Breaking capacity and large shorttime current capacity

By fully utilising electromagnetic repulsive force, a large shorttime current and high breaking capacity is achieved in ourlight and compact design.

Light contact springs used to provide adequate contact pressureto keep the contact temperature well within limits and alsoto avoid contact bouncing.

A large short circuit current causes an electromagneticrepulsive force between the contact lead halves.

This repulsive force works in a direction to turn the movingcontact clockwise about the contact shaft, giving it more contactpressure proportional to the short circuit current.

When interrupting a large current, the electromagnetic repulsiveforce works in a direction to separate the moving contact fromthe stationary contact.

This electromagnetic repulsive force adds to the separatingforce of trip spring, resulting in a high speed interruption.

1.3.1 Complete Isolation of Poles

All the poles are completely isolated from each other as well asfrom operating mechanism by high grade insulating materials. Arobust design of Arc Chute in a temperature resistant mouldedbody and fitted with scientifically shaped Deion-Grids, totallyencompasses the poles.

The high short circuit arc gases thus escape through arc chuteonly which clears and cools the highest short circuit arc energyin less than 10ms. This isolation thus helps in providing highestinsulation properties as well as breaking capacity.

1.3.2 High AC dielectric withstand voltage

Due to the use of non-hygroscopic, glass fibre based insulatingmaterials and corrugated shape employed for better creepagedistance, the AH series can withstand a dielectric voltage of 3.5KVfor a minute.

1.3.3 Space saving & standardisation of Switchboarddesign

The light and compact ACBs in 4 frame sizes not only help instandardising the Switchboard design but also reduce the size ofload centre.

Four Breakers upto 1600A frame and 3 Breakers above 1600Aupto 4000A frame can be arranged vertically in standard heightof 2300mm.

1.3.4 Highly Resistant to Vibration

Smallness of each component due to rational design ensures a lowresponse factor to vibration and high natural frequency. The designis also highly resistant to vibrations as required in ships.

Introduction

T T

T T

T T T

T T T

T T T T

T T T T

T T T

upto 1600AF 2000AF 3200AF

2300

T

Compact Breaker leads to space savingin Switchboards

8

IEC

IS

BS

VDE

AS

2.0 Ratings & SpecificationsTYPETYPETYPETYPETYPE A H - 6 B / DA H - 6 B / DA H - 6 B / DA H - 6 B / DA H - 6 B / D A H - 8 B / DA H - 8 B / DA H - 8 B / DA H - 8 B / DA H - 8 B / D A H - 1 0 B / DA H - 1 0 B / DA H - 1 0 B / DA H - 1 0 B / DA H - 1 0 B / DAMPERES FRAME IEC,BS,VDE,AS, IS 630 800 1000

Ith (A) JIS 600 800 1000JEC 600 800 1000NEMA, ANSI 600 800 1000Marine 600 800 1000

number of poles 2, 3, 4 2, 3, 4 2, 3, 4RATED CURRENT OF OVERCURRENT TRIP DEVICE In (A)for general industrial plant application 250 600 400

400 800 600600 800

1000

for generator protection(In is generator rated current)

RATED INSULATION VOLTAGE (Ui) AC 690/1000 690/1000 690/1000RATED ULTIMATE BREAKING/MAKING CAPACITY(Icu/Icm) at Ue(AC) 415V415V415V415V415V 50/10550/10550/10550/10550/105 50/10550/10550/10550/10550/105 55/12155/12155/12155/12155/121RATED SERVICE BREAKING/MAKING CAPACITY(PEAK)(Ics/Icm) at Ue(AC) 415V415V415V415V415V 45/94.545/94.545/94.545/94.545/94.5 45/94.545/94.545/94.545/94.545/94.5 50/10550/10550/10550/10550/105

with INST AC 690 V690 V690 V690 V690 V 30 / 6330 / 6330 / 6330 / 6330 / 63 30 / 6330 / 6330 / 6330 / 6330 / 63 40 / 8440 / 8440 / 8440 / 8440 / 84600 V 35 / 73.5 35 / 73.5 40 / 84500 V 40 / 84 40 / 84 45 / 94.5380 V 50 / 105 50 / 105 60 / 126240, 220 V 50 / 105 50 / 105 65 / 143

without INST AC 690 V690 V690 V690 V690 V 30 / 6330 / 6330 / 6330 / 6330 / 63 30 / 6330 / 6330 / 6330 / 6330 / 63 40 / 8440 / 8440 / 8440 / 8440 / 84with MCR and STD 600 V 35 / 73.5 35 / 73.5 40 / 84

upto 500 V 40 / 84 40 / 84 45 / 94.5without INST AC 690 V690 V690 V690 V690 V 30 / 6330 / 6330 / 6330 / 6330 / 63 30 / 6330 / 6330 / 6330 / 6330 / 63 30 / 6330 / 6330 / 6330 / 6330 / 63

upto 600 V 30 / 63 30 / 63 30 / 63NEMA with INST AC 690 V690 V690 V690 V690 V 35 / 80.535 / 80.535 / 80.535 / 80.535 / 80.5 35 / 80.535 / 80.535 / 80.535 / 80.535 / 80.5 40 / 8440 / 8440 / 8440 / 8440 / 84ANSI 480 V480 V480 V480 V480 V 40 / 9240 / 9240 / 9240 / 9240 / 92 40 / 9240 / 9240 / 9240 / 9240 / 92 50 / 10550 / 10550 / 10550 / 10550 / 105

240 V 50 / 115 50 / 115 65 / 143without INST AC 690V690V690V690V690V 35 / 80.535 / 80.535 / 80.535 / 80.535 / 80.5 35 / 80.535 / 80.535 / 80.535 / 80.535 / 80.5 40 / 8440 / 8440 / 8440 / 8440 / 84with MCR and STD upto 480 V 40 / 92 40 / 92 45 / 94.5without INST upto AC 600 V 30 / 63 30 / 63 30 / 63

JIS with INST AC 550 V 35 / 73.5 35 / 73.5 45 / 94.5JEC 460 V 40 / 84 40 / 84 50 / 105

220 V 50 / 105 50 / 105 65 / 143without INST AC 550 V 35 / 73.5 35 / 73.5 40 / 84with MCR and STD upto 460 V 40 / 84 40 / 84 45 / 94.5without INST upto 550 V 30 / 63 30 / 63 30 / 63with INST DC 250 V250 V250 V250 V250 V 40 / 4040 / 4040 / 4040 / 4040 / 40 40 / 4040 / 4040 / 4040 / 4040 / 40 40 / 4040 / 4040 / 4040 / 4040 / 40

OOOOOTHER RATHER RATHER RATHER RATHER RATINGSTINGSTINGSTINGSTINGSshort time current RMS (kA) 1 sec [3 sec.] Icw 45 / [25]45 / [25]45 / [25]45 / [25]45 / [25] 45 / [25]45 / [25]45 / [25]45 / [25]45 / [25] 50 / [25]50 / [25]50 / [25]50 / [25]50 / [25]total breaking time (ms) / Rated Closing Time 30/40 30/40 30/40Spring Charging Time (sec.) max. 10 10 10Over all Dimension (mm) TPFixed (HxWxD) 487x398x379Drawout (HxWxD) 505x430x509

Rated thermal current in open Air.Higher breaking capacity ACBs available on request.DC rating is of special application available upto 14000 A

400

< I

n ≤

630

25

0 <

I n ≤ 400

400

< I n

≤ 60

0

630

< I n

≤ 10

00

Ratings & Specifications

600

<I n

≤ 80

0

9


Values when fitted with magnetic type instantaneous trip.0.05 seconds for Microprocessor instantaneous trip.

A H - 1 2 B / DA H - 1 2 B / DA H - 1 2 B / DA H - 1 2 B / DA H - 1 2 B / D A H - 1 6 B / DA H - 1 6 B / DA H - 1 6 B / DA H - 1 6 B / DA H - 1 6 B / D A H - 2 0 C / DA H - 2 0 C / DA H - 2 0 C / DA H - 2 0 C / DA H - 2 0 C / D A H - 2 5 C / DA H - 2 5 C / DA H - 2 5 C / DA H - 2 5 C / DA H - 2 5 C / D A H - 3 0 C / DA H - 3 0 C / DA H - 3 0 C / DA H - 3 0 C / DA H - 3 0 C / D A H - 4 0 C / DA H - 4 0 C / DA H - 4 0 C / DA H - 4 0 C / DA H - 4 0 C / D A H - 5 0 CA H - 5 0 CA H - 5 0 CA H - 5 0 CA H - 5 0 C A H - 6 0 CA H - 6 0 CA H - 6 0 CA H - 6 0 CA H - 6 0 C1250 1600 2000 2500 3200 4000 5000 63001250 1600 2000 2500 3200 4000 5000 6150- 1300 1850 2150 3100 3650 5000 53001200 1550 1950 2250 3200 4000 5000 6150- 1600 2000 - 3000 4000 5000 60002, 3, 4 2, 3, 4 2, 3, 4 2, 3, 4 2, 3, 4 2, 3, 4 2, 3, 4 2, 3, 4

1250 400 800 2500 2000 4000 5000 6300600 1000 2500800 1600 32001000 20001600

690/1000 690/1000 690/1000 690/1000 690/1000 690/1000 690/1000 690/1000

55/12155/12155/12155/12155/121 55/12155/12155/12155/12155/121 60/13260/13260/13260/13260/132 65/14365/14365/14365/14365/143 75/16575/16575/16575/16575/165 100/200100/200100/200100/200100/200 100/200100/200100/200100/200100/200 120/264120/264120/264120/264120/264

50/10550/10550/10550/10550/105 50/10550/10550/10550/10550/105 50/10550/10550/10550/10550/105 50/10550/10550/10550/10550/105 65/14365/14365/14365/14365/143 85/18785/18785/18785/18785/187 85/18785/18785/18785/18785/187 100/220100/220100/220100/220100/22040 / 8440 / 8440 / 8440 / 8440 / 84 45 / 94.545 / 94.545 / 94.545 / 94.545 / 94.5 30 / 6330 / 6330 / 6330 / 6330 / 63 30 / 6330 / 6330 / 6330 / 6330 / 63 50 / 10550 / 10550 / 10550 / 10550 / 105 65 / 14365 / 14365 / 14365 / 14365 / 143 65 / 14365 / 14365 / 14365 / 14365 / 143 85 / 18785 / 18785 / 18785 / 18785 / 18740 / 84 45 / 94.5 45 / 94.5 45 / 94.5 65 / 143 75 / 165 75 / 165 85 / 18745 / 94.5 50 / 105 50 / 105 50 / 105 65 / 143 85 / 187 85 / 187 100 / 22060 / 126 65 / 143 65 / 143 65 / 143 65 / 143 100 / 220 100/220 120 / 26465 / 143 65/ 143 65 / 143 65/ 143 75 / 165 120 / 264 120 / 264 120 / 26440 / 8440 / 8440 / 8440 / 8440 / 84 45 / 94.545 / 94.545 / 94.545 / 94.545 / 94.5 45 / 94.545 / 94.545 / 94.545 / 94.545 / 94.5 45 / 94.545 / 94.545 / 94.545 / 94.545 / 94.5 50 / 10550 / 10550 / 10550 / 10550 / 105 65 / 14365 / 14365 / 14365 / 14365 / 143 65 / 14365 / 14365 / 14365 / 14365 / 143 85 / 18785 / 18785 / 18785 / 18785 / 18740 / 84 45 / 94.5 45 / 94.5 45 / 94.5 65 / 143 75 / 165 75 / 165 85 / 18745 / 94.5 50 / 105 50 / 105 50 / 105 65 / 143 85/ 187 85/ 187 100 / 22030 / 6330 / 6330 / 6330 / 6330 / 63 30 / 6330 / 6330 / 6330 / 6330 / 63 30 / 6330 / 6330 / 6330 / 6330 / 63 30 / 6330 / 6330 / 6330 / 6330 / 63 42 / 88.242 / 88.242 / 88.242 / 88.242 / 88.2 60 / 13260 / 13260 / 13260 / 13260 / 132 60 / 13260 / 13260 / 13260 / 13260 / 132 70 / 15470 / 15470 / 15470 / 15470 / 15430 / 63 30 / 63 35 / 73.5 35 / 73.5 42 / 88.2 60 / 132 60 / 132 70 / 15440 / 8440 / 8440 / 8440 / 8440 / 84 45 / 103.545 / 103.545 / 103.545 / 103.545 / 103.5 45 / 103.545 / 103.545 / 103.545 / 103.545 / 103.5 45 / 103.545 / 103.545 / 103.545 / 103.545 / 103.5 65 / 149.565 / 149.565 / 149.565 / 149.565 / 149.5 75 / 16575 / 16575 / 16575 / 16575 / 165 75 / 16575 / 16575 / 16575 / 16575 / 165 100 / 230100 / 230100 / 230100 / 230100 / 23050 / 10550 / 10550 / 10550 / 10550 / 105 50 / 11550 / 11550 / 11550 / 11550 / 115 50 / 11550 / 11550 / 11550 / 11550 / 115 50 / 11550 / 11550 / 11550 / 11550 / 115 65 / 149.565 / 149.565 / 149.565 / 149.565 / 149.5 85 / 18785 / 18785 / 18785 / 18785 / 187 85 / 18785 / 18785 / 18785 / 18785 / 187 120 / 230120 / 230120 / 230120 / 230120 / 23065 / 143 65 / 149.5 65 / 149.5 65 / 149.5 75 / 172.5 100 / 220 100 / 230 120 / 27640 / 8440 / 8440 / 8440 / 8440 / 84 45 / 103.545 / 103.545 / 103.545 / 103.545 / 103.5 45 / 103.545 / 103.545 / 103.545 / 103.545 / 103.5 45 / 103.545 / 103.545 / 103.545 / 103.545 / 103.5 65 / 149.565 / 149.565 / 149.565 / 149.565 / 149.5 75 / 16575 / 16575 / 16575 / 16575 / 165 75 / 16575 / 16575 / 16575 / 16575 / 165 85 / 18785 / 18785 / 18785 / 18785 / 18745 / 94.5 50 / 115 50/ 115 50 / 115 65 / 149.5 85 / 187 85 / 187 100 / 23030 / 63 30 / 63 35 / 80.5 35 / 80.5 42 / 96.6 60 / 138 60 /138 70 / 16145 / 94.5 45 / 94.5 45 / 94.5 45 / 94.5 65 / 143 85 / 187 85 / 187 100 / 23050 / 105 50 / 105 50 / 105 50 / 105 65 / 143 85 / 187 85 / 187 100 / 23065 / 143 65 / 143 65 / 143 65 / 143 75 / 165 100 / 230 100 / 230 120 / 30040 / 84 45 / 94.5 45 / 94.5 45 / 94.5 65 / 143 85 / 187 85 / 187 100 / 23045 / 94.5 50 / 105 50 / 105 50 / 105 65 / 143 85 / 187 85 / 187 100 / 23030 / 63 30 / 63 35 / 73.5 35 / 73.5 42 / 88.2 60 / 132 60 / 132 70 / 15440 / 4040 / 4040 / 4040 / 4040 / 40 40 / 4040 / 4040 / 4040 / 4040 / 40 40 / 4040 / 4040 / 4040 / 4040 / 40 40 / 4040 / 4040 / 4040 / 4040 / 40 40 / 4040 / 4040 / 4040 / 4040 / 40 40 / 4040 / 4040 / 4040 / 4040 / 40 40 / 4040 / 4040 / 4040 / 4040 / 40 40 / 4040 / 4040 / 4040 / 4040 / 40

50 / [25]50 / [25]50 / [25]50 / [25]50 / [25] 50 [45]50 [45]50 [45]50 [45]50 [45] 50 [50]50 [50]50 [50]50 [50]50 [50] 50 [50]50 [50]50 [50]50 [50]50 [50] 65 [65]65 [65]65 [65]65 [65]65 [65] 85 [70]85 [70]85 [70]85 [70]85 [70] 85 [70]85 [70]85 [70]85 [70]85 [70] 100 [70]100 [70]100 [70]100 [70]100 [70]30/40 30/40 30/40 30/40 30/40 30/40 30/40 30/4010 10 10 10 10 10 10 10

FP TP FP TP FP TP FP487x498x379 575x496x396 575x626x396 575x578x422 575x738x422 NA NA505x547x509 655x540x570 655x670x570 655x622x599 655x782x599 685x747x584 685x937x584

400

≤ I n

≤ 10

00

1000

< I

n ≤

1600

800

≤ I n

≤ 10

00

1600

<I n

≤ 20

00

I n ≤

2500

2000

<I n≤

3200

I n ≤

4000

I n ≤

6300

I n ≤

5000

I n ≤

1250

10

The thermal current ratings “Ith” of Circuit Breakersshown in ratings & specifications table onpage No. 8 are free air ratings i.e. in openexecution at 40oC ambient. The thermal ratings ofthe Circuit Breaker when mounted inside an enclo-sure depend upon:a) The dimensions of the cubical in which the

Breaker is mounted.

b) Ventilation area provided by way of louvers inthe Breaker cubicle.

c) Cross sectional area of the bus bars connectedto the Breaker terminals.

d) Ambient temperature other than 40oC

For ease of selection of our Breaker, keeping abovefactors into consideration, the thermal current ratings(I th) in an enclosure having ventilation &recommended ambient temperature are shown inthe table below:


2.2 Application

2.2.1 AC System

3 pole ACB for Industrial & Generatorapplication.

4 Pole ACB for complete safety in 3 phase 4wire distribution system as the neutral pole of4 pole ACB closes earlier & opens later thanother phase poles, thus effectively preventingtransient overvoltages on loads connectedbetween live & neutral lines.

2.2.2 DC System

2 pole ACB can be used on DC system wherethe short circuit breaking capacity requirementis not very high.

No teNo teNo teNo teNo te

1. The above enclosed thermal current ratings (Ith) have

been based when the Breaker Terminals are connected

with copper or aluminium bus bars of cross sectional

area as indicated in Table XI of IEC 947-2 & IS

13947-2.

2. C & S may be consulted, for thermal current ratings

in Enclosure with less ventilation area other than

shown in the above Table or at different ambient

temperatures.

3 pole ACB with 2 poles connected in seriescan be used in DC system where the shortcircuit breaking capacity requirement iscomparatively high.

A 4 pole ACB with 2 poles connected in parallelcan be used where the short circuit breakingcapacity requirement is low but the thermalcurrent rating is high. (For this application, theneutral pole closes alongwith the phase poles).Please clearly specify 4 pole ACB for DCapplication.

2.1 Conventional free air and enclosedcurrent ratings

1. 630 630 630 630 630 600 575 575 5502. 800 800 800 800 800 600 575 575 5503. 1000 1000 1000 1000 1000 600 575 575 5504. 1250 1250 1180 1250 1250 600 575 575 5505. 1600 1530 1420 1600 1550 600 575 575 5506. 2000 2000 1850 2000 2000 1000 700 766 6207. 2500 2330 2130 2500 2350 1000 700 766 6208. 3200 3200 3050 3200 3200 1250 800 766 7009. 4000 3820 3480 4000 4000 1250 800 766 700

10. 5000 4370 3990 5000 5000 1600 1000 800 77011. 6300 5150 4800 6300 6000 1600 1000 800 770

S .S .S .S .S . Open AirOpen AirOpen AirOpen AirOpen Air With no Venti lat ionWith no Venti lat ionWith no Venti lat ionWith no Venti lat ionWith no Venti lat ion With Venti lat ionWith Venti lat ionWith Venti lat ionWith Venti lat ionWith Venti lat ion V e n t i l a t i o nV e n t i l a t i o nV e n t i l a t i o nV e n t i l a t i o nV e n t i l a t i o n M i n .M i n .M i n .M i n .M i n . e n c l o s u r ee n c l o s u r ee n c l o s u r ee n c l o s u r ee n c l o s u r e d i m e n s i o n sd i m e n s i o n sd i m e n s i o n sd i m e n s i o n sd i m e n s i o n s ( m m )( m m )( m m )( m m )( m m )N o .N o .N o .N o .N o . R a t i n gR a t i n gR a t i n gR a t i n gR a t i n g DepthDepthDepthDepthDepthAt 50At 50At 50At 50At 50oooooCCCCC WidthWidthWidthWidthWidth HeightHeightHeightHeightHeightarea cm sq.area cm sq.area cm sq.area cm sq.area cm sq.At 40At 40At 40At 40At 40oooooCCCCC At 50At 50At 50At 50At 50oooooCCCCC At 40At 40At 40At 40At 40oooooCCCCC

11

2.3 A Wide Selection of Specifications

Various specification are available for wide selection to suit any particular application as well as local regulationsand requirements.


630 A

800 A

2000 A

2500 A

3200 A

4000 A

5000 A

6300 A

Fixed type Metalcladconstruction

Motor charging typeManual charging type

Power transformer

Spring charged switch

Draw-out type(standard)

Safety shutter Position switch Short-circuiting contact

Mal-insertion prevention device Lifter Test jumper

OCR Alarm switch

DC24V power supply

OCR checker

CT for Neutral line

Trip indication switch

Shunt trip Undervoltage tripWith or without T.D.

Close-open cycle counter

Key lock / Castle lock Key interlock system

Air Circuit Breaker is assembled to comply with your specifications

Note : Tropicalisation, cold climate treatment available on request at extra cost.

C - Series D - Series

The rma l Magne t i c t ypeThe rma l Magne t i c t ypeThe rma l Magne t i c t ypeThe rma l Magne t i c t ypeThe rma l Magne t i c t ype

1000 A1250 A1600 A

fo r gene ra to rfo r gene ra to rfo r gene ra to rfo r gene ra to rfo r gene ra to rP r o t e c t i o nP r o t e c t i o nP r o t e c t i o nP r o t e c t i o nP r o t e c t i o n

Adjustable L.T.D.

Adjustable S.T.D.

Making current release

fo r Gene ra lf o r Gene ra lf o r Gene ra lf o r Gene ra lf o r Gene ra lI ndus t r i a l P l an tI ndus t r i a l P l an tI ndus t r i a l P l an tI ndus t r i a l P l an tI ndus t r i a l P l an t

Adjustable L.T.D.

Non adjustable INST.

SELECTION ASELECTION ASELECTION ASELECTION ASELECTION AT YT YT YT YT YOUR OPTIONOUR OPTIONOUR OPTIONOUR OPTIONOUR OPTION

1

2

3

4

5

6

* L.T.D. means Long Time Delay* S.T.D. means Short Time Delay

7

8

9

10

Types ofMounting

Accessories fordraw-out type

Types of closingoperation

Accessories forclosing operation

Accessories forovercurrenttrip device

Other trips

Otheraccessories

Types &series ofBreaker

OvercurrenttripDevices

BreakerRating

ITEMITEMITEMITEMITEM

Mic ro M i c ro M i c ro M i c ro M i c ro p roces so rp roces so rp roces so rp roces so rp roces so r basedbasedbasedbasedbased

fo r Gene ra lf o r Gene ra lf o r Gene ra lf o r Gene ra lf o r Gene ra lI ndus t r i a l P l an tI ndus t r i a l P l an tI ndus t r i a l P l an tI ndus t r i a l P l an tI ndus t r i a l P l an t

Adjustable L.T.D.

Adjustable S.T.D.

Adjustable INST.

AdjustableGround-fault

Making currentrelease

12

3.0 Multi Function Protection Devices

3.1 Microprocessor Based Overcurrent Trip Device: “Type μμμμμIT”

μμμμμIT is a true RMS sensing overcurrent trip device, requiring no external supply for itsbasic function. It is available in two types, i.e., μμμμμIT–100 for industrial application andμμμμμIT–G for generator protection.

Overload (L.T.D.) current setting DIP switch.

Overload (L.T.D.) tripping time delay setting DIP switch.

Short circuit (S.T.D.) current setting DIP switch.

Short circuit (S.T.D.) tripping time delay setting DIP switch.

Instantaneous short-circuit current setting DIP switch.

Earth fault tripping current setting DIP switch.

Earth fault tripping time delay setting DIP switch.

Built-in operation checking DIP switch.

Function blocking DIP switch.

Reset switch.

LED Indicators.

Salient Features

Error free and user friendly settingof current and time delay.

Provides highest degree of systemprotection coordination.

Self powered by the built in currenttransformer.

No mal-operation due to externaldisturbances.

Built in operation check function.

Visual fault discrimination by LEDs.

Three phase and earth fault in onesingle compact unit.

Self monitoring of trip unit withblinking indication.

Function Blocking facility provided.

Certified by ERTL for

– Damp Heat Test IS 9000-PG4

– Dry Heat Test IS 9000-PG3

– Vibration Test IEC255-4

– Radio FrequencyInterference (RFI) IEC801-3

– Electrostatic Discharge(ESD) IEC 801-2

– Electrical Fast Transient(EFT) IEC 801-4

– Surge IEC 801-5

– Impulse IEC 255-4

Note : μμμμμIT-G is similar to μμμμμIT-100 in construction and function but differs in current and time settings

of LTD & STD.

Multi-Function Protection Devices

μμμμμIT - 100

11

11

13

Characteristic Curves μμμμμIT-100 (For Industrial Applications)

3.1.2 Setting of Short Circuit Current(STD)

S T D C u r r e n t :S T D C u r r e n t :S T D C u r r e n t :S T D C u r r e n t :S T D C u r r e n t : Minimum setting 4 x InSetting range 4, 5 ... 10 (in steps of 1)

S T DS T DS T DS T DS T D T i m e :T i m e :T i m e :T i m e :T i m e : Minimum Setting 50 ms

Delay Setting Range 50, 100, ... 550 ms.

(in steps of 50 ms)

3.1.4 Function Blocking

In normal running operation of unit, any ofthe four function can be blocked by turningthe DIP switches to ON position.

3.1.1 Setting of Over Load Current(LTD)

LLLLLTDTDTDTDTD Current :Current :Current :Current :Current :Minimum setting is 0.5 times In

Setting range: 0.5, 0.55 ...1.15(in steps of 0.05)

LLLLLTDTDTDTDTD TTTTT ime:ime:ime:ime:ime: Minimum Setting - 2.5 sec.Delay Setting range: 2.5, 5 ....... to 35 sec.

(in steps of 2.5 sec.)

3.1.5 Ground Fault Setting (GFT)

G F T C u r r e n t :G F T C u r r e n t :G F T C u r r e n t :G F T C u r r e n t :G F T C u r r e n t : Minimum Setting 15% of In

Setting Range 15, 20, ... 50 %(in steps of 5%)

GFT GFT GFT GFT GFT TTTTTime:ime:ime:ime:ime: Minimum Setting 50 ms

Delay Setting Range 50, 100, ... 550 ms(in steps of 50ms)

3.1.3 Setting of Instantaneous Current

C u r r e n t ( I N S )C u r r e n t ( I N S )C u r r e n t ( I N S )C u r r e n t ( I N S )C u r r e n t ( I N S ) ::::: Minimum setting 4xIn

Setting Ranges: 4, 5, ... 11

(in steps of 1)


2

2

2

14

Characteristic Curves μμμμμIT-G (For Generator Applications)

3.1.6 Setting of Over Load Current(LTD)

LLLLL T DT DT DT DT D S e t t i n g s :S e t t i n g s :S e t t i n g s :S e t t i n g s :S e t t i n g s : a) Minimum setting is 1 times In

S e t t i n gS e t t i n gS e t t i n gS e t t i n gS e t t i n g R a n g e :R a n g e :R a n g e :R a n g e :R a n g e : 1 to 1.3 In (in steps of 0.05)

b) Time = 15 to 65 sec at 120% Inmin. settings 15 sec (in steps of 5 sec.)

3.1.7 Setting of Short Circuit (STD)

S T DS T DS T DS T DS T D S e t t i n g s :S e t t i n g s :S e t t i n g s :S e t t i n g s :S e t t i n g s : a ) Current = 2 to 5.75In(in steps of 0.25)

b) Time = 50msec. to 420msec.(in steps of 50 msec.)

LED IndicationLED IndicationLED IndicationLED IndicationLED Indication

ON - LEDON - LEDON - LEDON - LEDON - LED ::::: This will indicate normal operation of unit.

All the other three LEDs will glow on their respective faults.

Reset switch is given to reset the LEDs.


Setting Example

DIP Switch Position

OFF

ON

LTD Time = 25 Sec.

LTD Current IO =1.25*In

X = 2.5

t = X+(a+b+d)

a = 2.5

b = 5

c = 10

d = 15

25 Sec = 2.5+(2.5+5+15)X = 1.0

a = 0.05

b = 0.05

c = 0.10

d = 0.10

IO = X+(a+c+d)1.25 = 1.0+(0.05+0.1+0.1)When X - min. valueabcd - settings

3.1.8 Test Mode

by 24V DC for testing the trip unit without injecting currentS t e p 1 :S t e p 1 :S t e p 1 :S t e p 1 :S t e p 1 : Put the DIP switch to TEST POSITIONS t e p 2 :S t e p 2 :S t e p 2 :S t e p 2 :S t e p 2 : Put the LONG or SHORT switch to ON

position.μIT will give trip command dependingupon the time set on respective LTD or STDtime delay DIP switches.

CAUTION : In normal running condition all the Test ModeDIP switches should be in OFF position (Normal position)

15


A direct acting electromagnetic instantaneoustrip device with fixed current setting for shortcircuit protection.

CT actuated thermal O/L Relay used along withShunt Trip or Undervoltage Trip Device forO/L protection

Trip testing at CT secondary current levels.

3.2 Economical Thermal Magnetic type 3.2.1 Base Current (In) (for Microproces-sor & Thermal Magnetic Types)

M i c r o p r o c e s s o r TM i c r o p r o c e s s o r TM i c r o p r o c e s s o r TM i c r o p r o c e s s o r TM i c r o p r o c e s s o r Ty p e a n d y p e a n d y p e a n d y p e a n d y p e a n d TTTTT h e r m a lh e r m a lh e r m a lh e r m a lh e r m a lMagnetic TMagnetic TMagnetic TMagnetic TMagnetic Typeypeypeypeype both have a single basecurrent that corresponds to one of the ratedcurrents available. When ordering, specify thebase current (In) that is higher than and closestto the rated load current passing through theAir Circuit Breaker.

AH-6DAH-6DAH-6DAH-6DAH-6D 250/400/600 250/400/600AH-8DAH-8DAH-8DAH-8DAH-8D 600/800 600/800

AH-10DAH-10DAH-10DAH-10DAH-10D 400/600/ 400/600/800/1000 800/1000

AH-12DAH-12DAH-12DAH-12DAH-12D 1250 1250AH-16DAH-16DAH-16DAH-16DAH-16D 400/600/800 400/600/800

1000/1600 1000/1600

ThermalMagnetic

Type

Typeof

ACBMicroprocessor

Type

ThermalMagnetic

Type

Typeof

ACBMicroprocessor

Type

Base Current (IBase Current (IBase Current (IBase Current (IBase Current (Innnnn) [A]) [A]) [A]) [A]) [A] Base Current (IBase Current (IBase Current (IBase Current (IBase Current (Innnnn) [A]) [A]) [A]) [A]) [A]

Tripping Characteristics of Thermal Magnetic Trip Device

AH-20DAH-20DAH-20DAH-20DAH-20D 800/1000 800/10001600/2000 1600/2000

AH-25DAH-25DAH-25DAH-25DAH-25D 2500 2500AH-30DAH-30DAH-30DAH-30DAH-30D 2000/2500 2000/2500

3200 3200AH-40DAH-40DAH-40DAH-40DAH-40D 4000 4000AH-50CAH-50CAH-50CAH-50CAH-50C 5000 5000AH-60CAH-60CAH-60CAH-60CAH-60C 6300 6300

(kA)

3

AH-8D

: 3 : Default setting for 16D

16

3.2.3 Making Current Release (MCR)

MCR instantaneously trips the Breaker without anyintentional time delay during closing operation, if themaking current exceeds a predetermined value andwhich is rendered inoperative when the CircuitBreaker is in closed condition. When the Breakeris closed on to a normal circuit condition, MCRbecomes inoperative affecting normal coordinatedsystem protection, thus most suitable for incomerBreaker.

3.2.2 Current Setting of the nonadjustable magnetic instantaneous tripand MCR (kA)

Applicable Breaker AH-6D AH-10D AH-20D AH25D AH-30D AH-40D AH-60CAH-8D AH-12D AH-50C

AH-16D

NI NI NI NI NI Instantaneous Trip Device 3 5 7.5 7.5 10 10 105 7.5 10 10 15 15 157.5 10 15 15 20 20 2010 15 20 20 25 25 25

* Select and specify one of the 15 20 30 30 30 30 30 pick-up currents from the 20 25 40 40 40 40 table 50 50 50 * Tolerance is + 20% 60

MCRMCRMCRMCRMCR Making Current Release 3 5 7.5 7.5 10 10 105 7.5 10 10 15 15 157.5 10 15 15 20 20 20

* Select and specify one of the 10 15 20 20 25 25 25 pick-up currents from the 15 20 25 25 30 30 30 table 20 25 40 40 * Tolerance is + 20% 50 50

Note : : Applicable where the rated current of overcurrent trip devices is not less than 250A. : Applicable to AH-10D and AH-12D. Default Setting for 16D Default Setting

A short time delay tripping ACB fitted with MCR canthus utilise its full particular time capacity by forminga selective tripping system with the other Breakerand can rapidly clear the faulty circuit without anytime delay when the Operator attempts to close it.

MCR

Operative

Arcing ContactsClose

Contacts Start tomove

Latched in

MCR Inoperative MCR Inoperative

Short-circuit current may flow

Closed Condition

Main ContactsClose

Closing Process

Closing Stroke

How MCR Operates

EL

EC

TR

OM

AG

NE

TIC

EL

EC

TR

OM

AG

NE

TIC

EL

EC

TR

OM

AG

NE

TIC

EL

EC

TR

OM

AG

NE

TIC

EL

EC

TR

OM

AG

NE

TIC


17

3.3.1 OCR Alarm Switch

This switch operates when the Air CircuitBreaker is tripped by the overcurrent device.Any of LTD, STD, INST or earth-fault tripcauses operation of this OCR alarm switch.

Its operation is as follows : normally OFF,ON for about 30 ms during ACB contactseparation, then OFF again. Use a suitableself-hold circuit for continuous OCR tripalarm indication.

3.3.2 2 4 V DC Power Supply

(T(T(T(T(To be fitted in the Po be fitted in the Po be fitted in the Po be fitted in the Po be fitted in the Panel)anel)anel)anel)anel)

Supplies 24V DC power to the micro-processor over-current trip device for :

- device function check purposes and

- for lighting the OCR trip indicators(LEDs).

3.3.3 OCR checker (outside)

Type : RCU - 2Power : 500VA, 50/60Hz 240VConsumptionTest : i) Calibration of current Functions

& time settings ofLTD, STD, Instantenous &Ground Fault

ii) Function Checkby 24V DC.

iii)Closing Openingtime of ACB

Dimensions : 545W x 420D x 345HWeight : 28 kg

3.3.4 Phase & Neutral CTs

Polyester resin cast 5A secondary, 5VA, class 5P10 precision CTs are rigidly mounted on the lower terminalsof the Breaker. The CTs thus provide most reliable and accurate current signals to the protection deviceseven in adverse environmental conditions.

The CT used for detecting a neutral line current in a 3 pole Breaker of a 3 phase four wire system,is mounted outside on the neutral bus bar. This CT is necessary when over current trip device is havinga ground fault protection element.

However, in a 4 pole Breaker, the neutral CT is rigidly mounted on the neutral terminal of the Breaker.

3.3 Accessories for Overcurrent Trip Devices

“Lamp” is a resistive load of positive temperature coefficient withinrush in excess of 10 times the normal current.

“Inductive” is a load whose power factor is 0.4 or more (AC)or time constant is 7 ms or less (DC)

“Motor” assumes starting current of 6 times the specified value.

RatingsRatingsRatingsRatingsRatings

Number o f con tac t sNumber o f con tac t sNumber o f con tac t sNumber o f con tac t sNumber o f con tac t s 1a1a1a1a1aC i r c u i t r yC i r c u i t r yC i r c u i t r yC i r c u i t r yC i r c u i t r y R e s i s t i v eR e s i s t i v eR e s i s t i v eR e s i s t i v eR e s i s t i v e L a m pL a m pL a m pL a m pL a m p I n d u c t i v eI n d u c t i v eI n d u c t i v eI n d u c t i v eI n d u c t i v e M o t o rM o t o rM o t o rM o t o rM o t o rR a t e dR a t e dR a t e dR a t e dR a t e d 480V 3 0.3 2 0.4currentcurrentcurrentcurrentcurrent (A)(A)(A)(A)(A) AC 250V 5 2 5 3

125V 5 3 5 4250V 0.3 0.05 0.3 0.05

DC 125V 0.6 0.1 0.6 0.130V 7 4 6 4

Dimension Drawing of 24V DC Power Supply UnitDimension Drawing of 24V DC Power Supply UnitDimension Drawing of 24V DC Power Supply UnitDimension Drawing of 24V DC Power Supply UnitDimension Drawing of 24V DC Power Supply Unit


OCR CheckerOCR CheckerOCR CheckerOCR CheckerOCR Checker

18

4.0 Spring Charging Operations

Spring Charging Operations

4.1 Charging of Springs Manually

The closing springs are manually charged by pumpingthe charging handle. When PUSH TO CLOSE buttonis pressed, the charge of the closing springs isreleased, quickly closing the Breaker.

A closing coil (Latch Release Coil-LRC) can beprovided for remote closing operations, however,the closing springs would have to be chargedmanually before doing a remote close operation.

4.2 Charging of Springs by Motor

The closing Springs are charged by an ElectricMotor. A closing command from an external “PushButton” energises the LRC (Latch Release Coil) whichreleases the charge of the closing spring to quicklyclose the Breaker.

With the Breaker closed, the Motor automaticallystarts to charge the spring again for the next closingoperation.

Manual charging is also possible in Motor chargingtype.

Motor Charging typeMotor Charging typeMotor Charging typeMotor Charging typeMotor Charging type

4.3 Rating of Motor charging -Spring release type

Rated voltage (V) Min. And Max. Inrush current (A) Steady-state current Charging Closing Command

50/60 Hz Operating Voltage (peak value) (AC:RMS value) time (S) current (A) Max.

Applicable Breakers : AH-6D, AH-8D, AH-10D, AH-12D, AH-16D

A CA CA CA CA C 200~230 170~255 9.6(220V) 1.0(220V) 4.0(220V) 2.7(220V)

100~115 85~130 4.7(110V) 0.8(110V) 6.0(110V) 4.0(110V)

DCDCDCDCDC 200~220 150~250 2.8(200V) 0.7(200V) 4.0(200V) 1.7(200V)

100~110 75~125 3.2(100V) 0.8(100V) 6.0(100V) 2.7(100V)

Applicable Breakers : AH-20D, AH25D, AH-30D, AH-40D, AH-50C, AH-60C

A CA CA CA CA C 200~230 170~255 21(220V) 1.0(220V) 3.5(220V) 2.7(220V)

100~115 85~125 8.5(110V) 0.8(110V) 5.0(220V) 4.0(110V)

DCDCDCDCDC 200~220 150~250 9.6(200V) 0.6(200V) 4.0(200V) 2.7(200V)

100~110 75~125 8.0(100V) 0.5(100V) 6.0(100V) 2.7(100V)

Note :Note :Note :Note :Note :

The charging motor is of short-time rating and the number of repeated open close cycles mustbe limited to 15 cycles followed by a cooling period of at least 20 minutes for further operations.

19

4.4 Motor Charging And Closing Operation Circuit

4.4.1 Charging of Closing Springs

When the closing springs are "DISCHARGED",the “spring charged OFF” switch in series withthe motor, is closed.

Control voltage is applied to terminals 1 and2 and the motor starts to charge the springs.

When the closing springs are fully charged, the“spring charged OFF” switch in series with themotor opens and cuts the supply to the motor.

4.4.2 Closing the ACB

When the springs are charged, the "springcharged ON switch" in series with the LRC isclosed.

Apply voltages across terminals 3 and 4through PB (close). The latch release coil (LRC)is energised and the closing springs are

released to close the ACB.

With the release of Closing Spring charge, the“Spring Charged On Sw” opens and the supplyto the LRC is cut OFF through the Aux.Sw.B1Contact which opens when the ACB gets closed.

4.4.3 Anti-Pumping Function

Once the closing spring have been released the“ACB Reset OFF” switch is closed. If a closedsignal is continuously applied across theterminals 2 and 3, the holding relay (HC) isenergised and self holds when the HC/1 contactcloses.

The HC/2 contact opens, cutting the supply tothe LRC, ACB can not reclose without openingthe PB (Close).

When ACB is fitted with under voltage trip UVTand tripped by it (voltage below opening value).

ACB will not reset until voltage above resettablevalue is supplied to UVT.

Closing Operation Circuit

M Charging motor

LRC Closing Latch Release

HC Anti Pump Relay of ACB

B1 Aux. Switch of ACB

PB Control Switch

Isolation Contact

The circuit may be separated into aclosing control and a motor circuit onrequest, so that they can be individuallyenergised.

Spring Charging Operations

The diagram shows the condition when closing springs are uncharged and ACB is tripped (not reset yet).

Closing Coil Rated Voltage (V) Min & Max. Excitation Closing Time(Max.)Type 50/60 (Hz) Operating (Excitation) Current Peak (A) (ms)

Min Max Voltages (V) (at Voltage)

AC 420 480 357-528 1.5 (415V)380 420 323-462 1.9 (380V)

AVH-C 180 250 153-275 2.7 (220V)100 150 85-165 4.0 (110V) 40

DC 150 230 128-290 2.4 (220V)90 120 77-150 2.7 (110V)40 52 34-60 5.0 (48V)20 26 17-30 8.1 (24V)

Technical specification for operation of closing coil device

20

4.5.1 Power Transformer OutsideWhen the control supply voltage is higher than230V AC, our special Step Down Transformer ora 350VA Transformer with 220V secondary shouldbe used for electrical charging operation.

4.5.2 Spring Charged SwitchProvides a NO (1a) contact signal, which is closedwhen the closing springs are fully charged. Usedfor indication at a remote place, from whereclosing is made.


250V AC - 15A, 250V DC - 0.25A

480V AC - 5A, 125V DC - 0.5A

5.0 Electrical Tripping5.1 Shunt Trip

The shunt trip device is used to electrically openor trip the Air Circuit Breaker from a remote place.The tripping commands to the shunt trip includethose from an overcurrent relay, reverse powerrelay, and similar protective relays.

No t e t ha t t h e s hun t t r i p u s e s one“a”-contact of the auxiliary switch.

4.5 Accessories For Closing Operation

Electrical Tripping

5.2 Undervoltage Trip

The undervoltage trip automatically opens the AirCircuit Breaker when the voltage supplied to it dropsbelow the opening voltage. It resets automaticallyon recovery of the supply voltage above theresettable value, and allows for closing of the AirCircuit Breaker. The undervoltage trip consists of anundervoltage trip device built-in the ACB and UVTControl Device installed external to the ACB.

Shunt trip Rated Voltage (V) Min & Max. Excitation Opening Time(Max.)Type 50/60 (Hz) Operating (Excitation) Current Peak (A) (ms)

Min Max Voltages (V) (at Voltage)

AC 420 480 294 -528 1.5 (415V)380 420 266-462 1.9 (380V)

AVH-S 180 250 126-275 2.7 (220V)100 150 70-165 4.0 (110V) 30

DC 150 230 105-290 2.4 (220V)90 120 63-150 2.7 (110V)40 52 28-60 5.0 (48V)20 26 14-30 8.1 (24V)

Technical specification for operation of shunt trip device

Undervoltage Trip

Under Rated Voltage (V) Excitation (PickUp) Opening [DropOff] Exc i ta t ionVo l tage Type 50/60 (Hz) Voltages (V) Vol tages (V) Current Peak (A)

A CA CA CA CA C 415-440 ≥353 154-308 0.1 (415V)

220-240 ≥187 84-168 0.1 (220V)

A U HA U HA U HA U HA U H 100-120 ≥85 42-84 0.1 (110V)

D CD CD CD CD C 200 ≥170 70-140 0.1 (200V)

100 ≥85 35-70 0.1 (100V)30 ≥25.5 10.5-11 0.1 (30V)

Technical specification for operation of UVT device

Shunt Trip

21

Type AUH-V is without time-delay, and is used

for AC supply. It trips the ACB immediately on

dropping of the supply voltage below the

opening value.

AUH-V-T is also for AC supply but with a time-

delay of 500 ms. It effectively prevents the

overiding of the short time delay over current

trip function caused by short circuit fault &

simultaneous voltage drop.

5.2.1 UVT Control Devices

Type AUH-1SC is without time delay and is

suitable for DC supply only.

The undervoltage trip, when in operation with

supply voltage below resettable value, keeps

the closing control circuit open and locks out

the PUSH TO TRIP button.

Electrical Tripping

Three Types of Control Devices are available

AC - rated Undervoltage Trip Control Circuit DC - rated Undervoltage Trip Control Circuit

22

The following types of accessories are available fordraw-out type Air Circuit Breaker.

6.4.1 Safety Shutter

When the Breaker is drawn out, it protectsthe operator from accidental contact with thelive parts by automatically concealing themain circuit on the draw-out frame side withinsulating barrier.

The shutter has a tamper proof lockmechanism. As the Breaker is inserted into thedraw-out frame, it unlocks automatically tofree the shutter and the shutter opens.

The shutter can be padlocked in the shutposition.

Labels, "BUSBAR" and "CIRCUIT", are suppliedto indicate the line-side and load-side maincircuit terminals, respectively, and they are tobe affixed by the user.

6.4.2 Position Switch

There is 1NO contact to indicate the "TEST" positionand 1NC contact to indicate the "CONNECTED"position.


250V AC - 15A, 250V DC - 0.25A

480V AC - 5A, 125V DC - 0.5A

6.4.3 Short-Circuiting Contacts

The short-circuiting contact shorts out the associatedauxiliary switch b-contact when the Breaker is in thetest position or further out position. Therefore, theb-contact circuit with this short-circuiting contactremains closed even when the Breaker is closed atthe test position.

6.4 Accessories (Optional) for Draw-out Breaker

6.1 Fixed Type

This consists only of the Circuit Breaker fitted withbrackets to enable it to be permanently mountedinside the Panel and the bus bars are directlyconnected to its terminals.

6.2 Metal Clad Type

The metal clad type consists of a fixed or draw outCircuit Breaker housed in a steel enclosure. Thiscan be used as a single pole mounted ACB or canbe readily constructed in a load centre by simplyplacing them one upon another in a tierarrangement.

6.3 Draw out type

This consists of a Circuit Breaker and a draw-outcradle. The Circuit Breaker can be withdrawn toany of the four draw out positions i.e. "CONNECTED","TEST", "DISCONNECTED" & "REMOVED".The Circuit Breaker body is kept connected to earththrough earthing shoes to the draw out frame in"CONNECT", "TEST" or in between to provide totalsafety to the Operator. The Panel door can be keptclosed in "CONNECTED", "TEST" & "DISCONNECTED"position.

6.0 Types Of Mounting

Type of Mounting

1. Connected Position

2. Test Position

3. Isolated Position

4. Remove Position

Both main and controlcircuits are connectedfor normal service

The main circuit is Isolatedand the control circuits areconnected. This positionpermits operation tests withthe switchboard panel shut.

Both main and controlcircuits are isolated. Theswitchboard panel doorcan be shut. Earth circuitstill connected.

The ACB is completely re-moved from the cradle.

23

Type of Mounting

This contact is useful when forming an interlockcircuit with another Breaker or Breakers or whenpreventing the test operation at the test position fromcausing any unwanted operation in the associatedcircuit.

The short-circuiting contact is open when the Breakeris in the connected position, and it can be fittedin parallel with any of the auxiliary switch circuits,B2, B3, B4 and B5.

6.4.4 Test Jumper

The test jumper allows checking of all functions onthe removed Breaker on a Test Bench and can besupplied on request.

6.4.5 Mal-Insertion Prevention Device

A good interchangeability exists in the C&S -AirCircuit Breakers and because of this feature, thereis a possibility for a Breaker of a different ratingbeing placed into the cradle of other rating. Thisis effectively prevented by the use of the Mal-insertion Prevention Device.

6.4.6 Lifter

A Sleek Lifter with variable size loader to suite allsizes of ACB or with a platform for safely handlingthe Breaker in plant or for mounting or removingthem from the panel are available.

6.4.7 Padlocking for user safety

Circuit Breakers are provided with Padlocking facility

on push to Trip & Push to Close button to avoid

accidental operation of breaking by unauthorised

persons.

The padlocking arrangement has also been provided

in drawout Breakers in all the 3 positions i.e.

"CONNECT", "TEST" & "DISCONNECT" positions.

This not only provides additional safety to the

Operator but also prevents the Breaker dislocation

due to vibration and shocks.

L i f t e rL i f t e rL i f t e rL i f t e rL i f t e rPadlock Facility

Safety Shutter

24

7.1 Auxiliary Switch

The auxiliary switch is an assembly of auxiliary contactsmechanically operated by the Air Circuit Breaker toelectrically indicate whether the Breaker is closed or open.

Every Air Circuit Breaker is fitted with an auxiliaryswitch. The Aux. Sw Contacts can be provided infollowing combinations and out of which some contactsare utilised for various accessories fitted in Breakeras shown in the table.

7.2 Combination of Aux. SW Contacts

AuxAuxAuxAuxAux SwSwSwSwSw

14 way 7-a-contact and 7-b-contacts (7a, 7b)

10 way 5-a-contact and 5-b-contact (5a, 5b)

5 way 3-a-contacts and 2-b-contacts (3a, 2b)

or

2-a-contacts and 3-b-contact (2a, 3b)

7.3 Trip Indication Switch

This switch closes (ON) when the Air Circuit Breaker istripped by overcurrent trip, shunt trip, undervoltage trip ormanual operation of PUSH TO TRIP buttons.

The table shown summarizes when the trip indication switchoperates (ON) and when it is reset (OFF).

Use a suitable self hold circuit as necessary for continuoustrip alarm indication.

7.0 Other Accessories Rat ings : Aux. Swi tch ContactsRat ings : Aux. Swi tch ContactsRat ings : Aux. Swi tch ContactsRat ings : Aux. Swi tch ContactsRat ings : Aux. Swi tch Contacts

TTTTTy p ey p ey p ey p ey p e AXH-1AXH-1AXH-1AXH-1AXH-1

Numbers o f con tac t sNumbers o f con tac t sNumbers o f con tac t sNumbers o f con tac t sNumbers o f con tac t s 5a 5b5a 5b5a 5b5a 5b5a 5b

Ra ted cur ren t (A )Ra ted cur ren t (A )Ra ted cur ren t (A )Ra ted cur ren t (A )Ra ted cur ren t (A ) AC 450V 7

AC 220V 7

AC 110V 7

DC 250V 2.5

DC 125V 4

Accessory Fixed Draw-out

Charging Motor 1b 1b

Shunt Trip / UVT 1a 1a

Over Current Trip Device 1a 1a

Metal Clad - 1a, 1b

Aux i l i a r y Con tac t s UsedAux i l i a r y Con tac t s UsedAux i l i a r y Con tac t s UsedAux i l i a r y Con tac t s UsedAux i l i a r y Con tac t s Used

Turn OFF on completion ofspring charging

Turn OFF on recovery ofvoltage above resettable

value and on completion ofspring charging

Turn OFF on completion ofspring charging after release

of button

PUSH TO TRIPbutton pressed

Remoteopening

Undervoltagebelow opening

value

Undervoltagetrip

Overcurrent trip-shunt trip

Cause of Operation Resetting Condition

*Rating of TIS are same as of OCR Alarm SW

Other Accessories

6.4.8 Door Interlock

The door interlock prevents the switchboard door frombeing opened when the Breaker is CLOSED.

The door is operational only when the Breaker isOPEN. It is also fitted with a lock release. Installationof the door interlock requires a simple drilling of theSwitchboard Panel door.

25

Breaker 3 cannot be closed



Other Accessories

7.5 Key Interlock System

A system of key locks used to interlock a number of

Breakers.

The key is removable only when the Circuit Breaker

is locked open.

Application ExampleApplication ExampleApplication ExampleApplication ExampleApplication Example

Incoming power Breakers 1 and 2 feed two bus

sections, which are connected by a bus-tie-Breaker-3.

When the bus-tie Breaker is closed, parallel feeding

with both Breaker 1 and 2 closed should not be

possible.

In this case, the same-numbered locks are fitted in

all the 3 Circuit Breakers and only two keys are used,

so that the bus-tie Breaker can be closed only when

either the Breaker 1 or 2 is locked in the open position

and that the Breakers 1 and 2 can be closed only

when the bus-tie Breaker is locked open.

A key lock device that is ready for use when a Castle

key lock (to be provided by the user) is fitted, is also

available.

7.6 Operation Counter

A four digit mechanical counter can be fitted with

display window on the front panel to show the number

of operations and to facilitate routine maintenance

after specified number of operations.

7.4 Key Lock & Castle Lock

It locks the Breaker in CLOSED or OPEN position, anda key is necessary to unlock so that only the authorisedoperator can operate the Breaker and prevent it frombeing operated by unauthorised persons.

KeyKeyKeyKeyKey LockLockLockLockLockLOCK-IN-OPEN TYPELocks the Breaker in open position.

LOCK-IN-CLOSED TYPELocks the Breaker in CLOSED position.(Specify either type when ordering).

Cast leCast leCast leCast leCast le LockLockLockLockLockA device that is ready for use, when a Castlekey lock is fitted is also available (specify typeof Castle lock when ordering).

Key Lock Castle Lock

26

7.7 Mechanical Interlock

Two Breakers can be mechanically interlocked. TheMechanical Interlock is available to any combinationi.e. in a vertical or horizontal arrangement betweenany frame size in fixed or drawout version.

7.8 Lifting Plate

For use with hooks, ropes etc. when lifting theBreaker.

7.9 Carrying Handle

For the purpose of lifting by hand.

7.10 Door Flange

Provided with D-Series ACB‘s to cover the panel cut-out of the board.

7.11 IP Cover

Mounted on the Switchboard Panel door to provideIP55 degree of protection as defined in IEC529.

Carrying Handle

IP Cover

Other Accessories

Horizontal Type Vertical Type

27

8.1 Special Environment Specs.

If the Breakers are to be used under abnormalenvironmental conditions, specify the applicabletreatment given below :

8.1.1 Moisture Treatment

This treatment is recommended for Breakers whichare to be used in areas where both temperature& humidity are higher i.e. Ambient temperature60oC or less & relative humidity 95% or lessprovided no condensation.

8.0 Multivolt drop, power consumption, (per pole)

Power Consumption

8.1.2 Anti-Corrosion Treatment

This treatment is recommended when Breakers areto be used in highly saline atmosphere or in chemicalplants.

8.1.3 Cold Climate Treatment

This treatment is provided when the Breaker is tobe used in very cold areas i.e. Storage - 40oC, Use-25oC Provided no condensation or freezing.

AH-6D fixed type 4.8 17.2

AH-8D draw-out type 8.04 28.2


AH-12D draw-out type 5.0 60.0


draw-out type 4.08 104.4



AH-25D fixed type 1.44 90

draw-out type 2.40 150





AH-50C draw-out type 1.6 350.0

AH-60C draw-out type 1.2 430.0

}

Power consumption(W) (Max)

}

Model No. & TypeMultivolt drop

per phase(mv) (Max)

28

Clearance

Clearance above Arc chute, maintenance space

from the Breaker bottom level.For fixed type air circuit Breakers,a l so , p rov ide a su f f i c i en tmaintenance space around thebeaker.

If an arc barrier is provided withinthe recommended maintenancespace , make the B reake rremovable.

Arc gases expel out from the arcchutes when the Breaker interrupta short circuit fault current. It istherefore necessary to keep thearea above these arc chutes clearof any metallic objects, includingelectric devices and earthedstructures, at least by the distance

shown below in reference to theBreaker bottom level. If theprovision of such distance isimpracticable, then provide abarrier of heat and flame resistantinsulating material and of sufficientsize to cover all arc chutes at theposition indicated also as minimum

9.0 Clearance Above Arc Chute, Maintenance Space

123456789011234567890112345678901 Metallic Structure / Electric Devices

Heat/Flame Resistant Insulating Plate

29

Copper -BusbarCopper -BusbarCopper -BusbarCopper -BusbarCopper -Busbar Aluminium- BusbarAluminium- BusbarAluminium- BusbarAluminium- BusbarAluminium- Busbar

CurrentCurrentCurrentCurrentCurrent No ofNo ofNo ofNo ofNo of Copper ConductorCopper ConductorCopper ConductorCopper ConductorCopper Conductor No. ofNo. ofNo. ofNo. ofNo. of Al ConductorAl ConductorAl ConductorAl ConductorAl ConductorRating(A)Rating(A)Rating(A)Rating(A)Rating(A) Bus-bars (Cu)Bus-bars (Cu)Bus-bars (Cu)Bus-bars (Cu)Bus-bars (Cu) Size (mm)Size (mm)Size (mm)Size (mm)Size (mm) Bus-bars (Al)Bus-bars (Al)Bus-bars (Al)Bus-bars (Al)Bus-bars (Al) size (mm)size (mm)size (mm)size (mm)size (mm)

630630630630630 22222 40*540*540*540*540*5 22222 40*8 / 40*1040*8 / 40*1040*8 / 40*1040*8 / 40*1040*8 / 40*10

800800800800800 22222 50*550*550*550*550*5 22222 50*8 / 50*1050*8 / 50*1050*8 / 50*1050*8 / 50*1050*8 / 50*10

10001000100010001000 22222 60*560*560*560*560*5 22222 50*1050*1050*1050*1050*10

12501250125012501250 22222 80*580*580*580*580*5 22222 63*1263*1263*1263*1263*12

16001600160016001600 22222 100*5100*5100*5100*5100*5 44444 50*850*850*850*850*8

20002000200020002000 33333 100*5100*5100*5100*5100*5 33333 100*10100*10100*10100*10100*10

25002500250025002500 44444 100*5100*5100*5100*5100*5 44444 100*10100*10100*10100*10100*10

32003200320032003200 33333 100*10100*10100*10100*10100*10 44444 150*10150*10150*10150*10150*10

40004000400040004000 22222 200*8200*8200*8200*8200*8 ~~~~~ ~~~~~

50005000500050005000 33333 200*8200*8200*8200*8200*8 ~~~~~ ~~~~~

63006300630063006300 44444 200*8200*8200*8200*8200*8 ~~~~~ ~~~~~

10.0 Recommended sizes of Cu / Al Busbar as per IS13947-2 &IEC60947-2

30

Outline Dimensions

11.1 Outline Dimensions and Panel Mounting Details (in mm)For AH-6D to AH-16D

Front View

Note: N is neutral pole of 4-pole breaker


31

Outline Dimensions

Rear ViewSide View

d

32

Outline Dimensions

11.2 Outline Dimensions and Panel Mounting Details (in mm)For AH-20D TO AH-25D


Front View

33

Outline Dimensions

Rear ViewSide View

34

11.3 Outline Dimensions and Panel Mounting Details (in mm)For AH-30D

Outline Dimensions

Front View

35

Outline Dimensions

Side View Rear View

36

11.4 Outline Dimensions and Panel Mounting Details (in mm)For AH-40D

Outline Dimensions

Front View

37

Outline Dimensions

Side View Rear View

38

Outline Dimensions

11.5 Outline Dimensions and Panel Mounting Details (in mm)For AH-50C / AH-60C

Front View

Rear View

39

Outline Dimensions

Side View

1000 770

800

40

12.0 Connecting Diagramwith motor stored energy operation

Electrical Connection Diagram

Thermal Magnatic Trip Circuit

Microprocessor Trip Circuit

Auxiliary Switch Circuit5 NO + 5 NC

B1 - USED INTERNALLY FOR ELECTRICAL ACBs A1 - USED INTERNALLY FOR ACB WITH SHUNT TRIP

A3 - USED INTERNALLY FOR ACB WITH MICROPROCESSOR A2 - USED INTERNALLY FOR ACB WITH UVT RELEASE

Table of Terminal Numbers of Accessories

Terminal Accessories

Numbers

1,2 Motor charging

7,8 Shunt trip

11,12 Under voltage trip

13,14 Trip indicating switch

17,18 OCR Alarm Switch

23,24 DC 24V source

31~52 Auxiliary Switch

3 /4 Closing Coil

4

B3

Auxiliary Switch Circuit7 NO + 7 NC

Draw Out Type Fixed Type

41

Electrical Connection Diagram

- - - - User wiring

CSC wiring

main and control isolatingContact

Connecting terminal(When breaker is fixedtype, connect terminals (37)and(38) directly to the auxiliaryswitch A2)

NI Electromagnetic inst. trip device

MCR Making Current Release

ARO-1B Source device for OCR

MHT Magnetic Hold Trigger

LRC CLOSING COIL

P.B. PUSH BUTTON

H.C. ANTI PUMPING RELAY

M CHARGING MOTOR

CT CT FOR OCR

SH SHUNT TRIP COIL

UV UNDER VOLTAGE TRIP COIL

X1, X2 AUXILIARY RELAYS

Test Position : 61-62 ON, 61-63 OFFConnected Position : 71-72 ON, 71-73 OFF

Position Switch (Draw-Out)

Shunt Trip Circuit

Trip Indication Switch

Motor Charging Circuit Under Voltage Trip CircuitClosing Circuit

42

13.0 Dimensional Details for Vertical Adapter(AH 6D ~ 25D)

AH 6~12 D AH 16 D

AH 20~25 D REAR VIEW AH 6~25 D

43

ACB Order Form

14.0 ACB Order FormRE

LEA

SES

Please fill seperate sheet for each type of ACB. Tick the box in front of each appropriate item and fill in the blanks.

CUSTOMER NAME ORDER NO. & DATE DELIVERY DATE

Notes : (1) Please refer catalogue / Price-List, for further details of μIT - 100 / μIT - G Releases.

(2) Neutral CT is required alongwith Microprocessor Release having Ground -Fault Protection. This has to be mounted onEarth / Neutral Busbar of Panel.

QTY. (NOS.)630 A 1000 A 1600 A 2500 A 4000 A 6300 A

800 A 1250 A 2000 A 3200 A 5000 A

3 POLE 4 POLE AMBIENT TEMP.

RATINGOF ACB

REQUIRED

NO. OFPOLES 40 0C 50 0C

WITHOUT RELEASES

12/24/36 WAY AUX. ISOLATING CONTACT ASSLY.

POSITION INDICATION SWITCH

SHORT CIRCUIT CONTACTS ______ NOS / ACB

CLOSING COIL ______ V AC / ______ V DC

SHUNT TRIP COIL ______ V AC / ______ V DC

MOTOR 240V AC 220V DC

110V AC 110V DCOPE

RATI

ON

MO

UNTIN

G

FIXED DRAWOUT

MANUAL ELECTRICAL

UNLE

SS &

OTH

ERW

ISE

SPEC

IFIE

D,

ALL

SETT

ING

S O

F RE

LEAS

ES W

OUL

D

BE S

ET A

T M

INIM

UM V

ALUE

S.

THERMALMAGNETIC

μIT-100 μIT-G

MICROPROCESSORRELEASE

EARTHFAULT REQD. NOT REQD.

SHUNT TRIP ______ V AC/ ______ V DC

(220V AC SHUNT TRIP IS PROVIDED AS STANDARD)

REQUIRED MAIN CT RATING _________ A

SETTING OF NON-ADJ. MAG. INST. TRIP _________ KA

MAIN CT RATING _____________ A, NEUTRAL CT RATING _________ A,

SETTINGS : OVERLOAD ________ A, SHORT CIRCUIT _________ A,

GROUND FAULT _______ A

AC

CES

SORI

ES

SPECIAL REQUIREMENT/ACCESSORIES (IF ANY)

AC DC

2 ACBs

3 ACBs

AUX. SW. 3 NO + 2 NC AUX. SW. 5 NO + 5 NC AUX. SW. 7 NO + 7 NC

TRIP IND. SWITCH OCR ALARM SWITCH SPRING CHARGE IND. SWITCH

POSITION IND. SWITCH CASTLE KEYLOCK SHUNT TRIP ______ VOLTS

KEY LOCK KEY INTERLOCK

UVT-AUH. ________ V, CLOSE-OPEN CYCLE COUNTER

MECHANICAL INTERLOCK

DOOR INTERLOCKHOR. VER.

DC ACDELAY

NO DELAY

( IF NOT SPECIFIED, 220V AC IS SUPPLIED )

END USER / PANEL BUILDER NAME & PHONE NO.

Committed to Excellence in Quality

acb manual

Documents

overcurrent trip device

high breaking capacity

position switch

generator protection

ratings

controls

highly resistant

arc chute