ACB Manual 6300

1

Section Contents PAGES

1. Introduction 2-5Salient features, internal & general appearance of Drawout ACB

2. Ratings & Specifications 6-9Free air & enclosed thermal current ratings for AC & DC applications & selectionof specifications

3. Multi-Function Protecion Devices 10-15Micro Processor Based over current trip device, Economical Thermal Magnetic &their accessories

4. Spring Charging Operations 16-17Manual & motor charging & accessories for closing operations

5. Electrical Tripping 18-19Shunt Trip, Capacitor Trip, UVT & Control Devices

6. Type of Mounting 20Fixed, metal clad type, lifter, accessories for draw-out, safety shutter, position switch,S/C contacts, test jumper, mal-insertion/ prevention device

7. Other Accessories 21-24Aux. Switch, Key lock, Mechanical Interlock, Door Interlock, Lifter, carrying handle

8. Power Consumption 25Internal resistance, reactance & special environmental specifications

9. Clearance 26Clearance above Arc chute, maintenance space

10. Outline Dimensions 27-36Outline dimensions & Panel Mounting Details of D series ACBs of 630A to4000A & C series ACBs of 5000 to 6300A

11. Electrical Connection Diagram 37-38Interconnections between electrical accessories & tripping devices

12. ACB Order Form 39ACB Order Form

4

General Appearance of Air Circuit Breaker

! Wide options of front panel fittings.

! 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.

! 5 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 & with Hall Sensor for DCsystem.

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.

“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).

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

Castle Lock.Castle Lock.Castle Lock.Castle Lock.Castle 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 erroneous 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.

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

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 & Specifications

$

TYPETYPETYPETYPETYPE 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 V 30 / 63 30 / 63 40 / 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 V 30 / 63 30 / 63 40 / 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 V 30 / 63 30 / 63 30 / 63

upto 600 V 30 / 63 30 / 63 30 / 63NEMA with INST AC 690 V 35 / 80.5 35 / 80.5 40 / 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 690V 35 / 80.5 35 / 80.5 40 / 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 % 30 30 30RATED CLOSED TIMEstored energy spring charging time (sec.) max. 10 10 10

close time (m sec.) max. 40 40 40

" Rated thermal current in open Air.# Higher breaking capacity ACBs available on request.$ DC rating is of special application.

400

< I

n ≤

630

25

0 <

In ≤

400

400

< I

n ≤

600

630

< I

n ≤

1000

Ratings & Specifications

600

<I n

≤ 80

0

9


% Values when fitted with magnetic type instantaneous trip.0.05 seconds for solid state instantaneous trip.

& AH-16C suitable for 50 KA breaking capacity at 600V AC also available on request.' Rated service breaking capacity & rated ultimate breaking capacity are same at all other voltages except at 415V.

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 / 84 45 / 94.5 30 / 63 30 / 63 50 / 105 65 / 143 65 / 143 85 / 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 / 84 45 / 94.5 45 / 94.5 45 / 94.5 50 / 105 65 / 143 65 / 143 85 / 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 / 63 30 / 63 30 / 63 30 / 63 42 / 88.2 60 / 132 60 / 132 70 / 15430 / 63 30 / 63 35 / 73.5 35 / 73.5 42 / 88.2 60 / 132 60 / 132 70 / 15440 / 84 45 / 103.5 45 / 103.5 45 / 103.5 65 / 149.5 75 / 165 75 / 165 100 / 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 / 84 45 / 103.5 45 / 103.5 45 / 103.5 65 / 149.5 75 / 165 75 / 165 85 / 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 30 30 30 30 30 30 30

10 10 10 10 10 10 10 1040 40 40 40 40 40 40 40

400

≤ I n

≤ 10

00

1000

< I

n ≤

1600

800

≤ I n

≤ 10

00

1600

<I n

≤ 20

00

In

≤ 25

00

20

00

<I n

≤3

20

0

In

≤ 40

00

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. 630 930 850 950 880 600 575 575 5502. 800 930 850 950 880 600 575 575 5503. 1000 1100 1010 1140 1040 600 575 575 5504. 1250 1300 1180 1350 1250 600 575 575 5505. 1600 1530 1420 1600 1480 600 575 575 5506. 2000 2030 1850 2200 2010 1000 700 766 6207. 2500 2330 2130 2540 2320 1000 700 766 6208. 3200 3280 3050 3620 3380 1250 800 766 7009. 4000 3820 3480 4270 4000 1250 800 766 700

10. 5000 4370 3990 5280 5000 1600 1000 800 77011. 6300 5150 4800 6150 5750 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

OCR Alarm switch

Shunt trip Capacitor trip Undervoltage tripWith or without T.D.

Trip indication switch

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.

Non adjustable INST.or

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.



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

▼ ▼

▼

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▼▼

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▼

▼

▼

▼ ▼ ▼

▼

▼

▼ ▼

▼▼

▼

f o 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



▼

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 setting DIP switch.

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

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

&&&&& Instantaneous short-circuit current setting DIP switch.

''''' Earth fault tripping current setting DIP switch.

((((( Earth fault tripping time 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 or in testmode any of the four function can be blockedby turning the 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)


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.)

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.)

3.1.7 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)

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

15

Multi-Function Protection Device

! 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

! Hall sensor actuated over load protection forDC application can also be provided.

! Trip testing at CT secondary current levels.

3.2 Economical Thermal Magnetic type

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

250 250

AH-6DAH-6DAH-6DAH-6DAH-6D 400 400

600 600


800 800

400 400


800 800

1000 1000


400 400


ThermalMagnetic

Type

Type

of

ACB

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.

Microprocessor

Type

ThermalMagnetic

Type

Type

of

ACB

Microprocessor

Type

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

800 800

1000 1000

1600 1600


1000 1000

1600 1600

2000 2000



2500 2500

3200 3200


AH-50CAH-50CAH-50CAH-50CAH-50C 5000 5000

AH-60CAH-60CAH-60CAH-60CAH-60C 6300 6300

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

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

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

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-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 arereleased 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.

! The diagram shows the condition when closingsprings are uncharged and ACB is tripped (notreset yet).

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.

Circuit Diagram:- Closing Circuit

Spring Charging Operations

20

4.5.1 Power Transformer Outside

When 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 Switch

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

RatingsRatingsRatingsRatingsRatings

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

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

5.0 Electrical Tripping

5.1 Shunt Trip

The shunt trip device is used to electricallyopen or trip the Air Circuit Breaker froma remote place. The tripping commandsto the shunt trip include those from anovercurrent relay, reverse power relay,and similar protective relays.

Note that the shunt trip uses one“a”-contact of the auxiliary switch.

5.2 Capacitor Trip

The shunt trip device will not work when powersupply (AC) of the trip equipment is disconnectedor when the voltage drops due to some kind ofshort circuit accident. In such a case the capacitortrip operates to trip the Air Circuit Breaker. Forcapacitor tripping, the shunt trip device is necessary.

Even in case when capacitor tripping is used it ispossible to open the Air Circuit Breaker when theovercurrent relay or low voltage relay operates.Capacitor trip is installed external to the Air CircuitBreaker but can be fitted inside the switchboard.

4.5 Accessories For Closing Operation

Capacitor Trip

Electrical Tripping

5.3 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.

,Rating : Capacitor Trip

Type

Rated voltage (V) AC 110V/220V

Rated frequency (Hz) 50/60

Using type AVH-1

Undervoltage Trip

Shunt Trip Rated Voltage (V) Min & Max. ExcitationType 50/60 (Hz) Operating Voltages (V) Current Peak

AC 420-480 250-600 1.8 (415V)380-420 220-530 1.9 (380V)

AVH-S 180-250 100-320 2.7 (220V)100-150 60-190 4.0 (110V)

DC 150-230 90-290 2.2 (220V)90-120 50-150 2.5 (110V)

24 14-30 8.1 (24V)48 28-60 5.1 (48V)

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.

5.5 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

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

A CA CA CA CA C 401-429 165-205 (330) 0.1 (415V)

200-240 88-110 (170) 0.1 (220V)

A U HA U HA U HA U HA U H 100-120 44-55 (170) 0.1 (110V)

D CD CD CD CD C 200 80-100 (170) 0.1 (200V)

100 40-50 (85) 0.1 (100V)

Three Types of Control Devices are available

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

22

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 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

6.0 Types Of Mounting

6.4 Draw out type

This consists of a Circuit Breaker and a draw-outcradle. The Circuit Breaker can be withdrawn to anyof 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.

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 r

Type of Mounting

23

Type of Mounting

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

6.5.1 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.

6.5.2 Position Switch

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

RatingsRatingsRatingsRatingsRatings

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

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

6.5.3 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.

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.

6.5.4 Test Jumper

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

6.5.5 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.

6.5 Accessories (Optional) for Draw-out Breaker

Safety Shuter

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.

7.4 Key Lock & Castle Lock

It locks the Breaker in CLOSED or OPEN position, and akey is necessary to unlock so that only the authorisedoperator can operate the Breaker and prevent it from beingoperated by unauthorised persons.

KeyKeyKeyKeyKey LockLockLockLockLock! LOCK-IN-OPEN TYPE

Locks 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 LockLockLockLockLock! A device that is ready for use, when a Castle key

lock is fitted is also available (specify type of Castlelock when ordering).

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

Key Lock Castle Lock

25

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

available.

7.6 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.

7.7 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.

Breaker 3 cannot be closed


Padlock Facility


Other Accessories

26

7.8 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.

7.9 Door Interlock

The door interlock prevents the switchboard doorfrom being 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 ofthe Switchboard Panel door.

7.10 Lifting Plate

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

7.11 Carrying Handle

For the purpose of lifting by hand.

7.12 Door Flange

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

7.13 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 frop

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

30

Outline Dimensions

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

120

158(3P)

215(3P)

(max.) (max.)

247

295

98

215 332(4P)

258(4P)158

10550

5

247

295

120

80

108

227

265

227

105

265

90

135

12

23.2 487

199

184

299(4P)199(3P)284(4P)184(3P)

15

(4P)(3P)

N

Mounting holes 4-ø10Projection of the mountingbolt into the draw-out cradleshould be 13mm max.

PANEL CUTOUTLH

CL

PANEL CUTOUTHL

DRAW-OUT TYPE

FIXED TYPE

Note: is neutral pole of 4-pole breaker.N


Screw M4circuits (Left,Right)Terminal blocks for control

Mounting holes 2-ø10

N

LH (3P) (4P)

31

Outline Dimensions

35

DIS

CO

NN

EC

TED

TES

TC

ON

NE

CTE

D Length availble for conductor connection2-ø11

550

575

9020

5b

t

482.

5

190

DR

AW

-OU

T

25

122 270 117 a

509

505(

max

.)

Wd

e

W

10065100

(4P)157(3P)257 157

100100

100 100 10045

15

254(4P) 154154(3P)

2-ø11

4525

15

30 Length for conductor connectionTYPE OF ACBAH-6DAH-10D,AH-12DAH-16D

b107107115

8

2012

t

100

334

t

187

b

384

37

113

2039

7

100

379 60

487

25

N


Mounting holes 2-ø10Mounting angle steel (not supplied) Use when vibration is excessive.Also make it removable for maintenance purpose.

Mounting angle steel (not supplied)

Lifting plate ø20

(3P)Metalclad ConstructionDimensions of

mounting holes 2- 10ø

Earth terminalØ9

TYPE OF ACBSAH-6DAH-10D AH-12D 12

303020

20 85045

AH-16D

a b d e t w

107107

46.846.8

46.8 115 203520 55

58

54

80

76

AH-6D/8D

MANUAL CHARGING

MOTOR CHARGING

TYPE

TYPE

WEIGHT (kg)

No.OF POLESTYPE

FIXED TYPE

FIXED TYPE

DRAW-OUT TYPE

DRAW-OUT TYPE

3

5670

1007495

6078

82

76

8098

102

AH-10D4 3 4

AH-12D

82

7860

56

3

9880

76

1024

AH-16D

85

8062

58

3

10586

82

1104

N

LHMounting angle steel (not supplied)

600

32

575

308

137 138

363

123

147

288

333

270

208 338(4P)

208(3P)

270(3P)

400(4P)

655

(max.) (max.)

575

288

308

117

127 123

363333

23315

248

363(4P)

233(3P)

378(4P)

248(3P)

24

15

135

20

138

(4P)(3P)

N


Projection of the mountingbolt into the draw-out cradleshould be 11mm max.


N

(4P)(3P)HL

circuits (Left, Right)

PANEL CUTOUT

LH

HL

for control

Terminal blocks

Screw M4

PANEL CUTOUTHL

DRAW-OUT TYPE

FIXED TYPE


Outline Dimensions

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

33

163 270 137

595(m

ax.)

232

425

60

289

117

630

153520

DIS

CO

NN

EC

TE

DTE

ST

CO

NN

EC

TE

D

Mounting angle steel (not supplied)

80

130 130130

213 150

240

175

65240

175HL

(4P)

(3P)

Mounting holes 3-ø 12

553

48

conductor connection

80

50

25

503-ø12

575

100

269

80

80

50

20

35

80

130130 130

15

15

505

25

20

3-ø12

480

15

328(4P) 198

198(3P)

conductor connectionLength availble for

296

117

396

570

700

Exte

nsi

on

rail

N

Earth terminal M8

Terminal blocksfor control circuits36-M4

N

HL


Mounting holes 2-ø12Mounting angle steel (not supplied) Use when vibration is excessive.Also make it removable for maintenance purpose.

Mounting holes 2-ø12 Mounting angle steel

(not supplied)

Lifting plate ø20


90

85

135

130

AH-20D

MANUAL CHARGING

MOTOR CHARGING

TYPE

TYPE

WEIGHT (kg)

No.OF POLESTYPE

FIXED TYPE

FIXED TYPE

DRAW-OUT TYPE

DRAW-OUT TYPE

3

90110

175115170

95140

145

115

120180

185

AH-25D4 3 4

620

766

L

Outline Dimensions

34

308

137

93

363

78147

290

333

311

249 409(4 P)249(3 P)

311(3 P)

471(4 P)655

(4P)(3P)

N


Projection of the mountingbolt into the draw-out cradleshould be 11mm max. (max.) (max.)

575

288

308


93

117

127 78

363

PANEL CUTOUT

333 N

(4P)(3P)HL

HL

274

15

289

Terminal blocks for control circuits (Left, Right)

Screw M4434(4P)

274(3P)

449(4P)

289(3P)

24

15

135

20

PANEL CUTOUT

LH

HL

DRAW OUT TYPE

FIXED TYPE


N


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

Outline Dimensions

35

Outline Dimensions

N

Mounting holes 3-ø 14

175 175 (3P)

255 (4P)80

255

48

36-M4for control circuitsTerminal blocks

112.5 112.5

30

578

15

160 160 16040

Earth terminal M8

160

15

160 160

N

480

40

396(4P) 236

236(3P)

HL


(3P)Metalclad ConstructionMetalclad ConstructionDimensions ofDimensions of

700

766

800

25

630

Mounting angle steel(not supplied)

Length available forconductor connection : 55

599

163 270 166

254

545

25

54

140

149

106

2581

3-15

(not supplied)

Mounting angle steelMounting holes

4-ø14

Exte

nsi

on

rail

425

232

620(m

ax.)

CO

NN

EC

TE

DTE

ST

DIS

CO

NN

EC

TE

D

20 35

322100

conductor connection : 55Length available for

Mounting angle steel(not supplied)

45

140

54

25

45

25

530

20 90

Lifting plate ø20

129

9425

422 119

550

577

Also make it removable for maintenance purpose.Mounting angle steel (not supplied) Use when vibration is excessive.Mounting holes 2-ø12

3- 15ø

135

130

215

210

AH-30D

MANUAL CHARGING

MOTOR CHARGING

TYPE

TYPE

WEIGHT (kg)

No.OF POLESTYPE

FIXED TYPE

FIXED TYPE

DRAW-OUT TYPE

DRAW-OUT TYPE

3

175

275180270

4

36

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

Outline Dimensions

308

134

93

363

78144

288

355

311

249 409(4 P)249(3 P)

311(3 P)

471(4 P)

655

(4P)(3P)

N


Projection of the mountingbolt into the draw-out cradleshould be 11mm max. (max.) (max.)

PANEL CUTOUT

LH

HL

DRAW OUT TYPENote: is neutral pole of 4-pole breaker.N

-

-

-

-

REAR VIEW

160

48

160

N

160

112.5 112.5

30

M8 tapped hole for

earth terminal

Terminal blocks for controlcircuits 36-M4

255 25580

175 175(3P)

(4P)

Mounting holes 3- 14ø

63

0

57

8

20

22

200

37

Outline Dimensions

25

Mounting angle steel

(not supplied)


599

163 270 166

106

2581

4- 15ø

(not supplied)

Mounting angle steelMounting holes

4-ø14

Exte

nsi

on

rail

425

232

620(m

ax.)

CO

NN

EC

TE

DTE

ST

ISO

LA

TE

D

20 35

No.OF POLESMOTOR CHARGINGTYPEMANUAL CHARGINGTYPE

WEIGHT (kg)

DRAW-OUT TYPE

DRAW-OUT TYPE

FIXED TYPE

FIXED TYPE235

240

-

-275-

280-

TYPE AH-40D3 4

63

017.5

353535

17.5

54

14

01

49

SIDE VIEW

38

Outline Dimensions

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

(4P)(3P)

N

6- 14 mounting holesø

PANEL CUTOUTLH

HL

DRAW OUT TYPE

REAR VIEW


180

141

285

150

20027

5

300

Projection of the mountingbolt into the draw-out cradleshould be 11 mm max.

146

(max.) (max.)

48

N

112.5 112.5

30M8 tapped hole forearth terminal

Terminal blocks for controlcircuits 36-M4

(3P)

(4P)

Draw-outhandle

248

685

295

373.5

485(4P)

563.5(4P)373.5(3P)

295(3P)

267(3P)266(4P)

95

320 320

225 225

Mounting holes 3- 14ø

619.

5

660

190 190 190

246

16 1662

R 200

39

Outline Dimensions

Mounting angle steel

35

CO

NN

ECTE

DTE

STDI

SCO

NN

ECTE

D

(Not supplied)

(not supplied)Mounting angle steel

50

160

447

Mounting holes6- 14ø

231

Exte

nsio

n ra

il

Dust plate surface

5

Front cover

Dust plate


25

25

4545

25

7014

016

6

3-ø1526828

191 121 25

146584

660

660

No.OF POLES

MOTOR CHARGING

MANUAL CHARGING

WEIGHT (kg)

DRAW-OUT TYPE

DRAW-OUT TYPE 350

345

450

445

TYPE AH-50C3 4 43

355

360

455

460

AH-60C

25

12.5

5

(max)125

SIDE VIEW

40

11.0 Connecting Diagram! with motor stored energy operation

Electrical Connection Diagram

41

Electrical Connection Diagram

42

ACB Order Form

12.0 ACB Order FormO

PERA

TIO

NRE

LEA

SES

AC

CES

SORI

ES

ACD C

2 ACB‘s3 ACB‘s

Reqd. with AOJ-1LC-GBX

DOOR INTERLOCK

SPECIAL REQUIREMENT(IF ANY)

SAFETY SHUTTER

12/24 WAY AUX. ISOLATING CONTACT ASSY. * Additionally reqd.

POSITION INDICATION SWITCH

SHORT CIRCUIT CONTACTS ______ NOS/ACB

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

TRIP IND. SW. OCR ALARM SW. SPRING CHARGE IND. SW.

KEY LOCK KEY INTERLOCK SHUNT TRIP ______ VOLTS

UVT - AUH

ARO - 1B CLOSE-OPEN CYCLE COUNTER

MO

UN

TIN

G

REQUIRED DELIVERY DATE

QTY.630A 1000A 1600A 2500A 4000A 6300A

800A 1250A 2000A 3200A 5000A

RATING OFACB

REQUIRED

AMBIENT TEMPERATURE 40OC 50OC

SHUNT TRIP ______ V AC/ ______ V DC

(230V AC SHUNT TRIP IS PROVIDED IN STANDARD ACB‘S)

REQUIRED MAIN CT RATING ________ A SETTING OF NON-ADJ. MAG. INST. TRIP _______ KA

REQD. MAIN CT RATING _________ A NEUTRAL CT RATING _________ A

SETTINGS : OVERLOAD ______ A, SHORT CIRCUIT ______ A, GROUND FAULT ______ ATHERMALMAGNETIC

CAPACITOR TRIP ______ VAC

Committed to Excellence in Quality

Notes :Notes :Notes :Notes :Notes : For further details of Microprocessor based Releases, Please refer Catalogue/Price-list- NCT is provided alongwith releases having ground-Fault Protection. This has to be mounted on Earth/Neutral Bus-bar of Panel.- Where Under-Voltage Trip or No Volt Coil is provided Shunt Trip can be fitted.* For Manual Drawout ACB 12 way Auxiliary Contacts assembly is standard fitting* For Electrical Drawout ACB 24 way Auxiliary Contacts assembly is standard fitting.Please mention the numbers of Auxiliary Contacts required in addition to the standard fittings.Please mention if B & C type ACB is required. B & D is upto 630A~1600A, C & D is upto 2000A~4000A

Please fill this sheet for each type and specification separately. Tick the Box in front of each appropriate item and fill the Blanks.

MICROPROCESSOR BASED TRIP

UNIT : µ IT - G (FOR GENERATOR PROTECTION)

ORDER NO. & DATECOMPANY’S NAME

Type of Control Device Reqd. with UVT

AUH -V-T AUH -V AUH -1 SC

______ Volts AC DC

FIXED DRAWOUT

MANUAL ELECTRICAL

CLOSING COIL ______ V AC/ ______ V DC

TRIPPING COIL ______ V AC/ ______ V DC

MOTOR 230V AC 220V DC

110V AC 110V DC

WITHOUT RELEASES

MICROPROCESSOR BASED TRIP

UNIT : µ IT - 100 (FOR INDL. APPLICATION)

NO. OFPOLES 3 POLE 4 POLE

43

Documents

ACB Manual 6300