What is the difference between MCB & MCCB,
Where it can be used,
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Answer Posted / balakrishnan
MCB is normally used for small loads like in DBs, MCB can
only protect loads from over current, it is available upto
100A.
MCCB is having some special characteristics over MCB. It
protects loads from over current, short circuit current and
earth fault protection. Moreover it is available in all
ranges (16A to 3200A).
MCBs are used mostly in DBs, MCCBs are used for all SMDBs
and MDBs.
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Sir,In our company there are 3 caterpillar make(capacity:(1) 3.3KV,2.5MW(2)3.3KV,2.5MW & (3)3.3KV,1.9MW) & 1 deutz make (capacity:11KV,3.8MW)gas engines utilised,all are running in paralell. There are three transformer utilised,(1) 6.25MVA,3.3KV/22KV,Impedence voltage:6.7% used for two generator,both are 2.5MW(2)5.5MVA,3.3KV/22KV,Impedence voltage:7.2% used for one generator of 2.5MW & (3) 5.5MVA,11KV/22KV,Impedence voltage:7.8% used for one generator of 2.5MW.all generator breakers capacity of 1250Amps. Sir,I want the details of fault level calculation of generator,transformer individually & for whole system. If you require any information from me.feel free for contact me sir.pl.send the answer of my question as the earliest as possible.
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