ALLInterview.com :: Home Page            
 Advertise your Business Here     
Browse  |   Placement Papers  |   Company  |   Code Snippets  |   Certifications  |   Visa Questions
Post Question  |   Post Answer  |   My Panel  |   Search  |   Articles  |   Topics  |   ERRORS new
   Refer this Site  Refer This Site to Your Friends  Site Map  Bookmark this Site  Set it as your HomePage  Contact Us     Login  |  Sign Up                      
Google
   
 
Categories >> Engineering >> Electrical Engineering
 
 


 

 
 Civil Engineering interview questions  Civil Engineering Interview Questions (3011)
 Mechanical Engineering interview questions  Mechanical Engineering Interview Questions (3270)
 Electrical Engineering interview questions  Electrical Engineering Interview Questions (13223)
 Electronics Communications interview questions  Electronics Communications Interview Questions (2348)
 Chemical Engineering interview questions  Chemical Engineering Interview Questions (407)
 Aeronautical Engineering interview questions  Aeronautical Engineering Interview Questions (76)
 Bio Engineering interview questions  Bio Engineering Interview Questions (16)
 Metallurgy interview questions  Metallurgy Interview Questions (79)
 Industrial Engineering interview questions  Industrial Engineering Interview Questions (162)
 Instrumentation interview questions  Instrumentation Interview Questions (2317)
 Automobile Engineering interview questions  Automobile Engineering Interview Questions (104)
 Mechatronics Engineering interview questions  Mechatronics Engineering Interview Questions (38)
 Marine Engineering interview questions  Marine Engineering Interview Questions (43)
 Power Plant Engineering interview questions  Power Plant Engineering Interview Questions (73)
 Engineering AllOther interview questions  Engineering AllOther Interview Questions (1189)
Question
What is the Difference Between MCCB & ACB & VCB
 Question Submitted By :: Vinod
I also faced this Question!!     Rank Answer Posted By  
 
  Re: What is the Difference Between MCCB & ACB & VCB
Answer
# 41
MCCB - moulded case circuti breaker - its use for low
voltage applications
ACB - air circuit breaker - its use for extra high power
applications
VCB - vaccum circuit breaker - its use for UP to 33 KV
power applications
 
Is This Answer Correct ?    1 Yes 0 No
Anbarasan
 
  Re: What is the Difference Between MCCB & ACB & VCB
Answer
# 42
MCCB stands for Moulded Case Ckt Breaker.
ACB Air Ckt Breaker.
VCB Vaccume Ckt Breaker..Its to Simple yar....
Summary....

MCCB (Molded Case Circuit Breaker)órated current up to 2500
A. Thermal or thermal-magnetic operation. Trip current may
be adjustable in larger ratings.
Vacuum circuit breakers are circuit breakers which are used
to protect medium and high voltage circuits from dangerous
electrical situations.
Air circuit breakeróRated current up to 10,000 A. Trip
characteristics are often fully adjustable including
configurable trip thresholds and delays.
 
Is This Answer Correct ?    2 Yes 0 No
Muhammad Junaid Afridi
 
  Re: What is the Difference Between MCCB & ACB & VCB
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
 
  Re: What is the Difference Between MCCB & ACB & VCB
Answer
# 44
MCCB which is nothing but moulded case circuit breaker.
ACB is nothing but Air circuit breaker and Vcb is Vaccum
circuit breaker..The main difference between last two thing
is the arc quenching medium.ACB is air and VCB is
vaccum.these two things are used for power tr and
distribution and MCB,MCCBs are used in small rating
machines also...
 
Is This Answer Correct ?    1 Yes 0 No
Arun Tyagi
 
  Re: What is the Difference Between MCCB & ACB & VCB
Answer
# 45
mcb acb & vcb difference is in spellings 
Is This Answer Correct ?    0 Yes 3 No
Afridi
 
  Re: What is the Difference Between MCCB & ACB & VCB
Answer
# 46
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
 
  Re: What is the Difference Between MCCB & ACB & VCB
Answer
# 47
MCCB which is nothing but moulded case circuit breaker.
ACB is nothing but Air circuit breaker and Vcb is Vaccum
circuit breaker..The main difference between last two thing
is the arc quenching medium.ACB is air and VCB is
vaccum.these two things are used for power tr and
distribution and MCB,MCCBs are used in small rating
machines also...
 
Is This Answer Correct ?    0 Yes 0 No
Ashish Mourya
 
  Re: What is the Difference Between MCCB & ACB & VCB
Answer
# 48
first... ACB means AIR CIRCUIT BREAKER>>????
ITS A AIR BREAK CIRCUIT BREAKER,,..
 
Is This Answer Correct ?    0 Yes 1 No
Arun
 
  Re: What is the Difference Between MCCB & ACB & VCB
Answer
# 49
All the above breakers are used for making and breaking an
electrical circuit under normal and abnormal(fault)
conditions.

The contact separation or travel in a MCCB takes place in a
moulded case and the maximum short circuit withstand
capacity of a MCCB is limited to 85 KA.

The contact separation in an ACB takes place in the medium
of air surrounding the contacts and in vacuum in VCB.
MCCB and ACB(125KA) are exclusively in low voltage
applications.

VCB can be used upto 36KV and its construction ensures the
following advantages over other types
1. It is more compact - smaller size
2, It has a smooth and quiet operation
3, It is echo-friendly - no gas or oil
4. least contact erosion leading to longer operating life
5. Minimum maintenance cost
 
Is This Answer Correct ?    0 Yes 0 No
D E Dhansingh
 
  Re: What is the Difference Between MCCB & ACB & VCB
Answer
# 50
MCCB,ACB,VCB all the three are protective devices only.
They are used to isolate the system which is connected
below them at fault conditions. Eg, Overload, Short
circuit,Earth fault.

MCCB - Operating on thermomagnetic principle, it's a very
compact taking less space can be used for low voltage 440
volts, up to 1000amps range.
ACB - Operating on electronic or microprocessor controller,
solenoid coil being used to isolate the system during fault,
it's takes more space as compered to MCCB & again it can
used for low voltage 440volts but up to 2500amps range.
VCB - Operating on electronic or microprocessor controller,
solenoid coil being used to isolate the system during fault,
it's takes more space as compered to MCCB & it can be used
for high voltage up to 33kv, above 33kv you go for SF6 breaker.
 
Is This Answer Correct ?    0 Yes 0 No
Ravikant Sawant
 

 
 
 
Other Electrical Engineering Interview Questions
 
  Question Asked @ Answers
 
what are the functions of current transducer and voltage transducer?   1
DO MEGGER TEST APPLIED ON SURGE ARRESTOR? IF YES THEN WHAT ARE THE ACCEPTED R VALUE REQUIRED FOR SURGE ARRESTORS FOR VOLTAGE LEVEL 11KV, 33KV   2
state the functions of different parts of star delta starter.   1
Definition of grid? Vijai-Electricals 7
dear friends, how to calculate "Gage" in copper wire , aluminum wire etc. have any formula?   1
For what purpose an AVR in generator sensing generator output voltage?and how the sensing is done by AVR?   3
Why the colour of insulator is always is chocolate in colour? Mrf 1
what is the speed of electricity? Bhel 10
What are the main factors to be considered(In terms of energy conservation) while selecting a new air compressor?   1
When the power Factor (p.f)is lead then how the Voltage can rises?   1
what is bus PT ?   3
What is Biased Generator Differential Relay?   2
 
For more Electrical Engineering Interview Questions Click Here 
 
 
 
 
 


   
Copyright Policy  |  Terms of Service  |  Articles  |  Site Map  |  RSS Site Map  |  Contact Us
   
Copyright © 2013  ALLInterview.com.  All Rights Reserved.

ALLInterview.com   ::  KalAajKal.com