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Question
What is working principle of ACB and VCB?
 Question Submitted By :: Electrical-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
ACB: air circuit breaker./ mostly used in LT side and arc
quenching by air.

VCBL Vacuum circuit breaker. HT application. arc quenched
by vacuum.
 
Is This Answer Correct ?    71 Yes 6 No
Balakrishnan
 
Answer
# 2
circuit bkrs. names related with arc quenching medium which
is used in breaker. mostly air ckt. bkr used for LT system
and arc quenching mwdium is only air but vaccume ckt. bkr.
used for HT system and arc quenching medium is vaccume
which is created in separate vaccume bottles where contacts
make and break .
 
Is This Answer Correct ?    40 Yes 4 No
Annu
 
 
 
Answer
# 3
ACB means "AIR CIRCUIT BREAKER" it is a Electrical power
supply protection equipment when fault occur in the system.
It is used in the Low Voltage application. The power supply
mechanical contacts are kept in the atmospheric air at the
time of fault, the breaker will trip the generated electric
arc ia quenched by the air.

VCB means " VACCUM CIRCUIT BREAKER " it is also same
equipment but used in the High Voltage application ( 11kv -
33kv ), here the power supply mechanical contacts are kept
in the vaccum sealed bottle, the vaccum will quench the arc
at the time faulty trip. The electric arc generation is
high when comparing with the ACB
 
Is This Answer Correct ?    23 Yes 4 No
N Karthikeyan
 
Answer
# 4
ABB MOSTLY USED IN LT SIDE BUT VCB FOR HT SIDE 
Is This Answer Correct ?    7 Yes 4 No
Pawan Ahlawat
 
Answer
# 5
ACB: As name it is Air circuit breaker, and it is used in
LV side of transmission, air as a arc quenching medium.
VCB: vaccume circuit breaker it used in HT side of
transmission there is not any medium for arc quenching so
it is vaccume circuit breaker
 
Is This Answer Correct ?    13 Yes 11 No
Ram Khapekar
 

 
 
 
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