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.
1111111111
1313131313
1212121212
1414141414
1515151515
1616161616
"""""#####$$$$$%%%%%
&&&&& '''''
(((((
)))))
*
+++++1111111111
1212121212
1313131313
1414141414
1515151515
1616161616
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
Ratings & Specifications
% 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:
Ratings & Specifications
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.
Ratings & Specifications
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.
Non adjustable INST.or
Making current release
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
▼ ▼
▼
▼ ▼
▼▼
▼▼
▼
▼
▼
▼ ▼ ▼
▼
▼
▼ ▼
▼▼
▼
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
Non adjustable INST.or
Making current release
▼
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)
Multi-Function Protection Devices
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.
Multi-Function Protection Devices
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
AH-8DAH-8DAH-8DAH-8DAH-8D 600 600
800 800
400 400
AH-10DAH-10DAH-10DAH-10DAH-10D 600 600
800 800
1000 1000
AH-12DAH-12DAH-12DAH-12DAH-12D 1250 1250
400 400
AH-16DAH-16DAH-16DAH-16DAH-16D 600 600
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
AH-20DAH-20DAH-20DAH-20DAH-20D 800 800
1000 1000
1600 1600
2000 2000
AH-25DAH-25DAH-25DAH-25DAH-25D 2500 2500
AH-30DAH-30DAH-30DAH-30DAH-30D 2000 2000
2500 2500
3200 3200
AH-40DAH-40DAH-40DAH-40DAH-40D 4000 4000
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.
Multi-Function Protection Devices
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
Multi-Function Protection Devices
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
Breaker 2 cannot be closed
Padlock Facility
Breaker 1 cannot be closed
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-10D fixed type 3.0 30.0
AH-12D draw-out type 5.0 60.0
AH-16D fixed type 2.4 61.4
draw-out type 4.08 104.4
AH-20D fixed type 1.8 72.0
draw-out type 3.0 120.0
AH-25D fixed type 1.44 90
draw-out type 2.40 150
AH-30D fixed type 1.32 134.4
draw-out type 2.28 235.0
AH-40D fixed type 0.96 169.0
draw-out type 1.8 288.0
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
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
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 4-ø12
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
Mounting holes 4-ø12
Projection of the mountingbolt into the draw-out cradleshould be 11mm max.
Mounting holes 2-ø12
N
(4P)(3P)HL
circuits (Left, Right)
PANEL CUTOUT
LH
HL
for control
Terminal blocks
Screw M4
PANEL CUTOUTHL
DRAW-OUT TYPE
FIXED TYPE
Note: is neutral pole of 4-pole breaker.N
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 4-ø12
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
(3P)Metalclad ConstructionDimensions of
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
Mounting holes 4-ø14
Projection of the mountingbolt into the draw-out cradleshould be 11mm max. (max.) (max.)
575
288
308
Mounting holes 2-ø12
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
Note: is neutral pole of 4-pole breaker.N
N
(3P)Metalclad ConstructionDimensions of
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
Mounting holes 4-ø14
(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
Mounting holes 4-ø14
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)
Length available forconductor connection : 55
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
Note: is neutral pole of 4-pole breaker.N
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
Length available forconductor connection : 55
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
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
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