While HT line put on to activate ACB in low tention panel VCB tripping instantly.why it happens

0 Answers   Engineering,

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How relay coordination has to be done? what are the inputs are required for this? Please explain this with calculation method?

0 Answers   Elektrotek,

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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.

0 Answers   Piramal Healthcare,

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What are the tests to be conducted in the electrical installations

1 Answers  

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What is the working principle of VFD

3 Answers   HCL,

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What are the special protection given for high capacity Motor, more then 10mw

2 Answers  

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Why transformer rating is represent in KVA?

7 Answers   Bhel, Sonalika, Usha Martin, Wipro,

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what is the minning of propotional, integral, derivative ?

1 Answers  

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Explain the operation of variable frequency transformer?

0 Answers  

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what is use of lockout relay in ht voltage

2 Answers  

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what is tpdt

4 Answers  

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Why material of brush is carbon in motors why not other material.

5 Answers   NTPC,

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