Answer Posted / chetan

Relay is simply a sensing device which sense the fault condition as per its setting and give information to circuit breaker to break the circuit or take the required action
where as circuit breaker is a protecting device which immediately trip the circuit when a fault condition occur or when it get a faulted signal from relay

what is the path of thunderlightening? once both a buffalo and a person were standing 5m apart but lightening hit and killed buffalo not person?

2873

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I have 440v power coming to facility,( not being used ) can I buy large generator, (gas) to sell power back to electrical co.

2460

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If you don’t have coal, salt and copper, then how would you earth your connection temporarily at a camp site.?

2231

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DEAR SIR,I GOT THE CALL LETTER FROM RRB, SECUNDERABD AS A JE-II SO PLEASE PROVIDE ME SOME MODEL QUESTION AND ANSWER PAPERS AND LAST YEAR QUESTION PAPERS

2054

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why occ characteristics of generator is also called as magnatization characteristics ?

2134

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what is the function of gss in the dg set.

1978

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why ups rating in kva? and why ups are in parellel?.why isolation transformer is used in ups?

1945

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plz tell me,ht and lt panel terminals in substations explain beiefly

2931

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What is the transfer function?

1091

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we have 2.2kw,Y,3000rpm motor but 6leads found in TB what happen if we connect in delta?

1927

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Explain cmrr?

1134

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For a 6.6kV Motor it is recommended to do megger test with 500 V d.c and not more than 5kV d.c but the Hi voltage withstand test should be performed by 12kV AC. Why the dc voltage test should be limited but AC voltage withstand test could be with such a high voltage?

2324

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In Power cable specification what is U0/U and Um.

3819

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what is mean by ideal infinite bus? why it is required to consider in fault short circuit calculations?

2711

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what should be the no load current for 3 phase ac motors ranging from 5 kw to 1000kw?

1801

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