Answer / omar aziz

Every electrical equipment installed in a power system has
an I2t rating. Eg(20kA for 1sec) This indicates the maximum
permissible energy that the equipment can withstand before
blowing into bits. Protection co ordination must ensure
that this damagiong curve is always protected by the
protection system. This is Energy based coordination.

Time based coordinaation is when no energy basis are
required but time selection is picked for personnel safety
reasons and not equipment damage reasons

what is CT class? depending upon which it is classified?

3 Answers   Siemens,

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Why 60Hz frequency is used in America what are all the benifits?

5 Answers  

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what about the power of wattmeter at starting and loding?

0 Answers   TATA,

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What are the types of circuit breakers ?

6 Answers   Genco, Super Max,

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sir iam a 3rd yr eee student.no core company comes for recruitment to our college.my aim is to be placed in l and t.tell me the procedures.

0 Answers  

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what is mean by descripiency relay? & wht is its ansi code?

0 Answers  

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In a flange coupling, the flange bolts are designed for

0 Answers   Caterpillar,

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purpose of flux relay for turbo generator in power plant

1 Answers  

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Our Alternator nameplate specifies a power factor of 0.8. When the Alternator is on light load, the bus bar voltage rises to 11240 volts, whereas the standard value is 10500 volts. Is it ok to increase the power factor to 0.85 or 0.9. I am afraid because the power factor on the name plate is only 0.8 ?

3 Answers   Escube,

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Require Generator Capcity ( KVA ) for 3 Phase Motor having 4.7Kw with starting current of 16amps?

1 Answers  

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Why rating of transmission line in kv not in kva

2 Answers  

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for preparation of design note of 11 / 220 kV , 3 phase, 63 MVA transformer how can calculate or consider the iron losses and copper losses

1 Answers  

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