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TAB1 : Frame Rating 20A to 160A



TAB : Thermal Adjustable Breaker

1/21, Asaf Ali Road, New Delhi - 110002 Ph.: 23234411, 23234811Fax : 011-23232639 e-mail:[email protected]

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Resident Offices:

25

40

TAB250C

230; Uimp = 8kV

16

25

16

25

TAB160D

230; Uimp=8kV

your electrical protection

S itch on

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16

25

16

25

TAB160D

230;U imp = 8kV

Salient Features

?Conforms to IEC 60947-2 / IS 13947-2?Available in various frame sizes rated current from

20A-630A

?Wide range of breaking capacity available from10kA to 65kA

?Quick-make, Quick-Break & Trip Free mechanism.

?Clear indication of 'ON', 'OFF' and 'TRIP' position.

?Low let-through energy.

?Adjustable Thermal release (80-100%) offersclose protection from changing load.

?Line load reversibility available

?ROHS Compliant.

?Wide range of internal and external accessories.

?Uniform Door cut-out in line with MCB uptoSize TAB 2

?Uniform depth of MCCB upto Size TAB 2

2 3

CONTENTS

Salient features

Advantages

Technology

Working principle

Accessories

Characteristic curves

3

4

4

5

6

7

8

9

10

13

Application

Overview

Specifications

Product References & Ordering

The TAB Series

The TAB Series

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Applications

Distribution feeder protection

Transformer protection

DG set protection

Motor protection

Capacitor protection

Protection for semi-conductor

fuses

UPS protection

DC load protection

Suited for incoming and

outgoing feeders

Effective protection to

distribution transformers as

outgoing breakers.

Used for protection and control

of diesel generating sets against

overloads and short circuits.

MCCB provides motor back up

protection, provide type -2 co-

ordination (as per IEC 60947) in

conjunction with suitably rated

contactors and relays.

Used to protect capacitors.

Used to protect semiconductor

fuses.

Used for UPS and electronic

equipment protection.

Suitable for both AC as well as

DC application for protecting

rectifier panel.

MCCB is suitable for circuit protection in individual enclosures,switch board, lighting and power panels as well as motor controlcenters.

MCCB is assigned to protect systems against overload and shortcircuit up to 65KA with full range of accessories.

TMTAB ........series provides the following applications :-

Icu = O-CO

Ics = O-CO-CO

The rise in temperature on the terminals, body etc. after the S.C.breaking capacity test is well within limits to give better life to theproduct and also safeguards the entire distribution system.

Insulation

Operating Knob/Dolly is made of Thermoplastic insulating materialto make it safer & reliable.

Utilization Category

Utilization category for a circuit breaker shall be stated withreference to whether or not it is specifically intended for selectivityby means of an intentional time delay (with respect to other circuitbreaker in series). Utilization category is a regulation on application

with respect to selectivity.

1. Utilization Category A :

Circuit breaker not specifically intended for selectivity under shortcircuit conditions. Such breakers do not have a short time withstandcurrent rating. All Thermal-Magnetic breakers satisfy utilizationcategory A.

2. Utilization Category B" :

Circuit breaker specifically intended for selectivity under shortcircuit conditions. Such breakers have a short time withstandcurrent rating. All electronictype breakers satisfy utilizationcategory B.

Working PrincipleTM

TAB .....Series breakers work on current limiting principle.

Current limiting capacity of a circuit breaker is its aptitude to limitshort-circuit current. When a short circuit occurs, the breaker is able

2to limit and lower the I t energy release in very short time so as toprotect circuits and switchgear at downstream. This is achieved by

?Intelligent design of Arc Chamber

?Guiding the arc rapidly away from the contacts in the arcchamber.

?Quick opening of main contacts.

?Quick quenching of arc by using effective arc quenchingmethods & materials.

Therefore Ipk is limited to Ic which leads to substantial reduction in2

electrodynamic stresses in the system. Also I t let throughproportional to the shaded area is considerably reduced, resultingin lower thermal stresses in downstream equipment andconnecting cables.

Ipk

Ic

Advantages1. Compactness :

It is very compact in size and hence helps in savingspace in the enclosures, panels etc. Due to its slim sizeit uses the distribution space very efficiently regardlessof fact whether it is in residential or functionalbuildings.

2. Simplicity :

Its handling is easy and simple. Its simplicity and easein use allows the user for quick installation.

3. Safe to use :

It is very safe to use. It protects people, installation andpower supply distribution system. The insulationproperty of the material used is highly reliable andremains intact in even critical conditions.

Evolution

To reflect a variety of uses and applica tions, the line uphas been expanded up to 65 KA with highspecifications. As consumption of power isincreasing, circuit breaker demands for a new level offunctionality, flexibility, power and space saving hasbecome imminent.

TMHPL has got its very new TAB series of MCCBswhich has improved performance and safety.

It conforms to the latest IS & IEC standards.

Ics= 100%Icu

The IS/IEC 60947-2 specifies the Icu (rated ultimateshort circuit) and Ics (rated service short circuit)breaking capacities to the following types:-

4Thermal Adjustable Breaker 5Thermal Adjustable Breaker

Prospectivecurrent

Cut-off current

TAB630H

65

95 47.5

32.5

230;U imp= 8kV

16

25

16

25

TAB160D

230

25

40

18.75

30

TAB250C

230; Uimp=8kV

; Uimp= 8kV

The TAB Series

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Operating Conditions

1. Temperature : MCCBs are calibrated at 40C as reference ambientTemperature. However with increase in ambient, compensationfactor to be taken into consideration.

2. Altitude : It should be less than 2000m.

3. Pollution Degree : 3

Isolation Function

These MCCBs are suitable for isolation also. As defined in IEC 60947-2/IS 13947-2, the operation of isolation function highlights thefollowing points:-

Contacts operation correctly indicates operating reliability of interiormechanism.

No residual current.

Higher impulse withstand voltage for terminals at the power supplyside and load side.

Line-load Reversibility

MCCBs have no bias of lineload connec tion. The power supply can beconnected from either top or bottom which has no effect on normaloperation of the breaker.

The Technology For MCCB Devices

1. Arc Chamber

The MCCB arc chamber is specially designed with an arc channel as a

flow guide to improve the capability of extinguishing the arc andreducing the arc distance.

2. MCCB Base And Cover

Cover and Base moulding are made of superior quality ofThermoplastics to with stand the stringent short circuit conditionswith very high insulation strength to avoid any damage to theproduct. Covers are secured on Base mouldings with mountingscrews tightened into threaded inserts in the MCCB base to havebetter strength.

3. Fixed Contact

The MCCB fixed contact does not have any mounting screws near thecontact points. A steel screw can generate heat and the magnetic fluxsurrounding the conductor carrying the current can create a very hightemperature. If a short-circuit occurs, it will cause the contact points

to be welded or melted.

4. Thermal Magnetic Tripping

1. In case of Thermal overload, time-delay operation occurs when anover current heats and warps the bimetal to actuate the trip bar.(See-'A')

2. In case of Magnetic tripping, when high current passes through,the magnetization of the fix core enables it to attract the armaturefixed on trip bar thereby tripping the breaker. (See-'B')

1

2

3

4

B

A

Technology for MCCB Devices Overview


The TAB SeriesThe TAB Series

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It has a wide range of accessories giving convenience andadditional protection. They are of two types.

1. Internal accessory

2. External accessory.

Internal Accessories:Shunt Trip Coil

It is a release energized by a source of voltage which may beindependent of the voltage of the main circuit. It providesremote tripping of the circuit breaker. Once the MCCB trips it

prevents burning of coil even if supply is continuous to coil.Its operating voltage is 70% to 110 % of rated voltage.

Undervoltage Release

It permits a mechanical switching device to open or close,with or without time delay, when voltage across release fallsbelow a predetermind value. The normal working range is35- 70% of the rated voltage.

Auxillary Switch

It is used for remote signaling and control purposes. Itconsists of one or more than one potential free change overcontact and acts as an indicator whether the circuit breaker'sstatus is open or closed.

Alarm Switch

It is an auxiliary switch which operates only upon the trippingof the circuit breaker. It gives tripping indication once theMCCB trips.

External Accessories:Rotary Handle

It is a toggle handle operating mechanism which serves asswitching position indicator ON, OFF, TRIP. Basically it is usedwith breaker which is installed in an enclosure that does not

allow ready access to the breaker's operating handle. Thehandle is allowed to be locked in the OFF or ON position forsafety. This feature helps to reduce the risk associated witharc related flash burns.

Phase Barrier

Phase barriers are provided between the phases to increasethe creepage distance between them thereby reducing therisk of phase to phase shorting.

Technical Features

1. Standard conformity : IEC-60947-2&IS -13947-2

2. Rated operational voltage : 415V AC

3. Rated insulation voltage: 690V AC

4. Utilization category : A

5. Rated frequency: 50/60Hz.

6. Rated impulse voltage : 8kV

Accessories Product Reference & Ordering

Frame Breaking Ics = Rated Current Rated Current Rated Current Current No. of

size Capacity % Icu TAB 160 TAB 250 TAB 630 Main Poles

TAB 160 L : 10 kA X = 100% 020 063 250 AC 2P

TAB 250 D : 16 kA Y = 75% 025 080 320 DC 3P

TAB 630 C : 25 kA Z = 50% 032 100 400 4P

N : 36 kA 040 125 500

S : 50 kA 050 160 630

H : 65 kA 063 200080 250

100

125

160

Accessories for TAB MCCB

Frame Shunt Under Voltage Auxiliary Alarm Rotary

size Release Release Switch Switch Handle

TAB 160 110 VAC 110 VAC 1 C/O 1 C/O RHDM : Door Mounted

TAB 250 240 VAC 240 VAC 2 C/O RHCM : Breaker

TAB 630 415 VAC 415 VAC Mounted

024 VDC 024 VDC

048 VDC 048 VDC?Product Reference for 240 VAC shunt release with TAB 160 is TAB160SHT240VAC

?Product Reference for 240 VAC under voltage release with TAB 160 is TAB160UVR240VAC

?Product Reference for 1 C/O Auxiliary switch with TAB 160 is TAB160AXC1

?Product Reference for 1 C/O Alarm Switch with TAB160 is TAB160ALC1

?Product Reference for 1 C/O Alarm / Auxiliary Switch with TAB160 is TAB16 ISI TAB160 ALAX

?Product Reference for Rotary Handle Door Mounted with TAB 160 ISI TAB 160 RHDM

?A Maximum 2 Nos. Internal Accessories can be selected for one Breaker, one on e ach side

?Shunt or Under voltage release is fitted on LHS.

?Auxiliary / Alarm Switch is fitted on RHS.


TAB 160

?TAB 160 MCCB is available with breaking capacity 10 kA / 16 kA / 25 kA / 36 kA

?TAB 250 MCCB is available with breaking capacity 25 kA / 36 kA / 50 kA

?TAB 630 MCCB is available with breaking capacity 36 kA / 50 kA / 65 kA

?TAB 160 MCCB is available ready stock in different current ratings and breaking capacity

?TAB 250 & TAB 630 MCCBs will be available from 2010. Please contact our nearest sales office for more information.

L X 100 AC 3P

The TAB Series The TAB Series

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Frame 1

No. of poles 3/4

Type L D C N

Rated Current* 20-160A 20-160A 20-160A 20-160A

Rated Operational Voltage 415V

Rated Insulation Voltage 800V

Rated Impulse withstand voltage 8kV

Dielectric strength 3 KV for 1 minute

Rated Frequency 50/60 Hz

Reference Ambient Calibration Temperature** 40C

Rated Ultimate S.C. Breaking Capacity 10 16 25 36(at 415 VAC, 50/60 Hz) Icu in kA

Rated Ultimate S.C. Breaking Capacity 16 25 40 50(at 230 VAC, 50/60 Hz) Icu in kA

Rated Ultimate S.C. Breaking Capacity 12 18 30 40(at 250 VDC) Icu in kA

Rated Service S.C. Breaking Capacity 100% Icu 100% Icu 75% Icu 50% Icu(at 415 VAC, 50/60 Hz) Ics in kA

Rated Service S.C. Breaking Capacity 100% Icu 100% Icu 75% Icu 50% Icu(at 230 VAC, 50/60 Hz) Ics in kA

Rated S.C. Making Capacity 17 32 52.5 75.6

(at 415 VAC, 50/60 Hz) Icm in kA

Utilization Category A

Positive Isolation Available

No. of operating cycles Mechanical-25000; Electrical-7000

Type of Releases Thermal - MagneticRelease Setting Thermal 80-100% Adjustable

Release Setting Magnetic Fixed2

Terminal Capacity (Cables) 50mm max.2

Terminal Capacity (Link) 120mm max.

Terminal Capacity (Busbar width for direct mounting) 16 mm max.

Size (H x B x D) Dim. 3P 4P UnitH 130 130 mmB 75 100 mmD 71 71 mm

Weight 0.9 Kg (3P) & 1.15 Kg (4P)

Reference Standards IEC 60947-2/IS 13947 (Part 2)

Notes :- *Continuous current rating available are 20, 25, 32, 40, 50, 63, 80, 100, 125 & 160 Amps.

**However on demand, MCCBs can be provided with calibration done at higher temperature also.

4P MCCBs are available in TPN as well as true 4 pole version.

Specifications

No. of poles 3/4

Type - C N S

Rated Current* _ 63-250A 63-250A 63-250A






Reference Ambient Calibration Temperature** 40C

Rated Ultimate S.C. Breaking Capacity - 25 36 50(at 415 VAC, 50/60 Hz) Icu in kA


Rated Ultimate S.C. Breaking Capacity - 30 40 55(at 250 VDC) Icu in kA

Rated Serv ice S.C. Breaking Capac ity - 75% Icu 50% Icu 50% Icu(at 415 VAC, 50/60 Hz) Ics in kA

Rated Serv ice S.C. Breaking Capac ity - 75% Icu 50% Icu 50% Icu(at 230 VAC, 50/60 Hz) Ics in kA

Rated S.C. Making Capacity - 52.5 75.6 105


Utilization Category A



Type of Releases Thermal-MagneticRelease Setting Thermal 80-100% Adjustable

Release Setting Magnetic Fixed2

Terminal Capacity (Cables) 95mm max.2



Size (H x B x D) Dim. 3P 4P UnitH 150 150 mmB 105 140 mmD 72 72 mm

Weight ...Kg (3P) & ........Kg (4P)


Notes :- *Continuous current rating available are 63, 80, 100, 125, 160, 200 & 250 Amps.

**However on demand, MCCBs can be provided with calibration done at higher temperature also.

4P MCCBs are available in TPN as well as true 4 pole version.


75

25

131

107

92

71

45

68

Frame 2

35.0

120.0

150.0

105

TEST

72

68

103

45.0

TEST

The TAB1 Series

Specifications The TAB2 Series

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Frame 3

No. of poles 3/4

Type - N S H

Rated Current* _ 250-630A 250-630A 250-630A






Reference Ambient Calibration Temperature** 40CRated Ultimate S.C. Breaking Capacity - 36 50 65(at 415 VAC, 50/60 Hz) Icu in kA


Rated Ultimate S.C. Breaking Capacity - 20 25 35(at 250 VDC) Icu in kA

Rated Serv ice S.C. Break ing Capaci ty - 75% Icu 50% Icu 50% Icu(at 415 VAC, 50/60 Hz) Ics in kA

Rated Serv ice S.C. Break ing Capaci ty - 75% Icu 50% Icu 50% Icu(at 230 VAC, 50/60 Hz) Ics in kA

Rated S.C. Making Capacity - 75.6 105 143


Utilization Category A & B



Type of Releases Thermal-Magnetic & Electronic

Release Setting Thermal Adjustable (80-100% in Thermal-Magnetic type);(50-100% in Electronic type)

Release Setting Magnetic Adjustable (60-120% in Thermal-Magnetic type);(30-120% in Electronic type)

Rated Short Time Withstand capacity 6(at 415 VAC, 50 Hz for 1 sec) Icw in kA***

Terminal Capacity (Cable) -2



Size (H x B x D) Dim. 3P 4P UnitH 254.5 254.5 mmB 140 184 mmD 99 99 mm

Weight ...Kg (3P) & ........Kg (4P)


Notes :- *Continuous current rating available are 250, 315, 400, 500 & 630 Amps.

**However on demand, MCCBs can be provided with calibration done at higher temperature also.***for category "B" Electronic MCCB only. 4P MCCBs are available in TPN as well as true 4 pole version.

0.01

0.1

1

10

100

1000

10000

1 min

2 min

5 min

10 min

20 min

30 min

1 Hr

2 Hr

x In (Current in Amps)

TripTime(Seconds)

ThermalCurrent

Rating (A)

25

32

40

50

63

80

100

125

160

Mag.Current

Setting (A)

500

500

500

500

900

900

1000

1250

1600

Ambient Compensation Curve(TAB-1)

0 %

50%

100%

200%

10

150%

250%

20 30 40 50 60 70 80

CURRE

NTIN%

TEMPERATURE IN 0C

0.01

0.1

1

10

100

1000

10000

1 min

2 min

5 min

10 min

20 min

30 min

1 Hr

2 Hr


TripTime(Seconds)

T

hermalCurrent

Rating (A)

63

80

125160

200250

Mag.Current

Setting (A)

1000

125016002000

2500

Ambient Compensation Curve (TAB-2)

0 %

50%

100%

200%

10

150%

250%

20 30 40 50 60 70 80

CURRENTIN%

TEMPERATURE IN 0C

TMT-C Curve (TAB -2)



80% 100%

20151052 8

TripTime(Seconds)

Milliseconds

Seconds

Min

utes

(612 ) x In

1

4

10

40

100

400

1

4

10

401

4

10

40

1002H


Ambient Compensation Curve (TAB-3)

0 %

50%

100%

200%

10

150%

250%

20 30 40 50 60 70 80

CURRENTIN%

TEMPERATURE IN 0C

Characteristic


1 2 3 4 5 6 7 8 9 10 20 30 40 5 0 60 70 8090100

1 2 3 4 5 6 7 8 9 10 20 30 40 5 0 60 70 8090100

254

215

630AON

OFF

44

140

137

99

108

97

ON

OFF

630A

20 500

500

100

1000

1000

Specifications The TAB3 Series The TAB Series

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Documents

File 332