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Question
What is the Difference Between MCCB & ACB & VCB
 Question Submitted By :: Electrical-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 41
mccb:moulded case circuit breaker used as an incomer to any
panel,mccb can be used till 1000A beyond that acb & vcb are
used,acb=>3000A at 440v low tension side
vcb=>3000A > 6.6kv,11kvat medium voltage side
sf6=>6000 > 66kv,110kvat high voltage side
 
Is This Answer Correct ?    1 Yes 2 No
Sridhar
 
Answer
# 42
MCCB ACB VCB
100A TO 800A 800A TO 4000A UP TO 4000A

LT LT HT

ARC QUEANCE ARC QUEANCE ARC QUEANCE

LOW PLACE < PLACE < PLACE (HT)

BIMETALIC AIR VACUM

LOW COST < COST < COST

NOT CHARGER CHARGER CHARGER
 
Is This Answer Correct ?    1 Yes 2 No
Kather Oli
 
Answer
# 43
All the said breakers havet their own rupturing capacity (
ability to break the prospective short circuit level) and
are used accordingly.

MCB is Miniature Circuit Breaker which has a rupturing
capacity of 10KA and is used for lighting and other
circuits where the short circuit levels are below 10 KA

MCCBs or Moulded case circuit breakers have a rupturing
capacity of 80 KA

ACBs or Air circuit breakers have a rupturing capacity upto
120KA

VCBs are vacuum circuit breakers which are extensively used
in LV & HV circuits because of their advantages like a
longer operating life and lower erosion of contacts.
 
Is This Answer Correct ?    0 Yes 1 No
D E Dhansingh
 
Answer
# 44
first... ACB means AIR CIRCUIT BREAKER>>????
ITS A AIR BREAK CIRCUIT BREAKER,,..
 
Is This Answer Correct ?    0 Yes 1 No
Arun
 
Answer
# 45
mccb is moulded case circuit breaker, is used in power
cicuits to provide isolation for circuit from high current,
short circuit and earth fault. but mccb only can use in low
current cases at 440volts.

acb is air circuit breaker, can also use in power circuits
to provide isolation in those same cases. but in high
current cases at 440volts with more functions.

vcb is vaccume circuit breaker. it is for high voltage
cases like 11kv, 33kv etc with more function than acb and
same reason of application.
 
Is This Answer Correct ?    0 Yes 2 No
V. K. Vishwakarma
 
Answer
# 46
mcb acb & vcb difference is in spellings 
Is This Answer Correct ?    0 Yes 3 No
Afridi
 
Answer
# 47
MCCB is MOLDED CASE CIRCUIT BREAKER
ACB is AIR CIRCUIT BREAKER
VCB is VACCUM CIRCUIT BREAKER

VCB is MORE PROTECTIVE IN COMPERSION TO ACB
THEREFORE WE USE VCB IN HT SYSTEM FOR MORE PROTECTION.
 
Is This Answer Correct ?    0 Yes 4 No
Pankaj Kr. Gupta
 
Answer
# 48
the main difference is mccb means moulded case circuit
breaker which use ark
quenching device as AIR which is used upto 500 Amps only
ACB:air circuit breaker which use quenching device as air
and used upto 3000 Amps at 415 volts

Mccb is not having a long life ACB is having long life
 
Is This Answer Correct ?    14 Yes 19 No
Bn.abhilash Kumar
 
Answer
# 49
wtat is st and pt, ct 
Is This Answer Correct ?    46 Yes 75 No
Ddharampal
 
Answer
# 50
MCCB MEANS MOULDED CASE CIRCUIT BREAKER IT IS USED FOR ARC
QUENCHING AND MEDIUM VOLTAGE

VCB MEANS VACCUM CIRCUIT BREAKER IT IS USED FOR ARC
QUENCHING HIGH VOLTAGE

ACB MEANS AIR CB AND IT IS USED FOR ARC QUENCHING AND HIGH
VOLTAGE
 
Is This Answer Correct ?    31 Yes 60 No
Abhilesh Kumar
 

 
 
 
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why voltages are added when batteries are connected in series?   2
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Assume a condition such that two motors of rating 6.6kv,415v are connected to blower,so tell me which motor draw large current give appropriate reason? NTPC 2
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what is power system transient condition   1
2 Diesel Generators 900KVA connected to the bus bar for essential load as an alternative for power taken from 11/440V 3KVA Transformer supplying this bus bar. my question here is in the event of power failure on 11KV side can I feed the power to 11 KV bus by using the same transformer as reverse feed, what will be the inrush current??? Ashok-Leyland 3
say a transformer is designed for 33/11kv step down with ratio 0.33 for load 1 mva. if am giving 11kv as a input that same transformer what will happen to its o/p voltage. and whether it can be operated for 500kva   4
which bridge is used to measure frequency?   1
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why abcd parameters are called as transmission parameter?   1
 
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