what is the technical diffrences of mccb and acb
- 11 Answers
- 20036 Views
- TransWorks, I also Faced
- E-Mail Answers
Answer Posted / krishanu bhattacharya
Generally speaking, ACB are used as main incomer protection,
that means just after the transformer as the highest short
circuit current would be available just after the
transformer whereas MCCB are used as protection in outgoing
feeders where current rating & SC Breaking capacity needed
is a bit less than ACB. Though now a days MCCB and ACB both
can break a 100kA fault, but the main difference is:
ACB is category A breaker whereas MCCB is category B. that
means ACB can withstand the high SC current for a few
seconds so that the whole system will not trip just for a
small fault but in case of MCCB there is no withstand
capacity, if there is that too for ver smaal time in ms. So,
physical dimension of ACB are moere than MCCB. Thanks
| Is This Answer Correct ? | 23 Yes | 1 No |
Post New Answer View All Answers
The series field winding has low resistance while the shunt field winding has high resistance. Why?
What are the causes of having an rmu explode after installation? And how do u treat the bushings of an rmu?
how does a submersible pump work..?
What is knee point voltage?
Is it a better option to procure screw type air compressor rather than reciprocating air compressor?If so, what is the reason?How should we select an air compressor(100 CFM)? Please mention the important parameters of air compressor.
how to choose cable size with respect to load? how to convert cable size in mm2 to sq.mm?
Is it possible to measure correct value of earth resistance & cable insulation ristance with out disconncting earth lead & both sides of cable ends? If not, any other method to measure ER & CIR with out disconneting from the system.
Why do we use center tap transformer that used with portable tools
how line turns ratio changes in 3 phase with change in connection
How to assume answer to electrical questions
How much weight an electrical engine can pull??
what is the effect of earth on capacitance in 3-phase and 1- phase transmission line?
how to find the voltage's of a transmission line plzz help with pictures i am not able to understand
What is the procedure/activities to be taken to inject the current more than 2000A by using 2000A Loading Transformer?
describe the Tranformer testing procedure
