Answer Posted / ankush miglani 09718151073

reverse power relays are used to prevent the reverse power
flow to the generating stations so that in casse when
generation is off the power will not flow from grid back to
the generating system. it is unidirectional relay

can u give me a brief idea about power line carrier communication ??

1896

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how is the incoming cable size calculated for a given current rating of a panel??

1985

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Differentiate between Zero and Negative sequence current

1947

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What is gross error?

1189

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If we connect a motor and generator together (I mean that the generator gives the motor electricity and the motor gives the generator movement) regardless the losses. Will the generator still generate and the motor still move?

2326

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A 3-phase IM is supplied from 50 Hz system. It runs at speed of 1440 rpm and slip equal to 4 %. Calculate number of pole pairs. A 1 B 6 C 2 D 3

2063

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what ispositive, negative, zero sequence impedence?

2077

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what is meant by 3rd hormonics ?

1907

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What is the exact minimum vale of voltage between an earth and netural which can damage or can do malfunction of the electronic equipments ? If this is mentioned in any book, pl.give reference.

2330

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How to calculate the phase to phase clearness of HT /// LT bus bar?????

2134

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Would you recommend to replace all oil filled cables with xlpe cable for hv transmission with the current technolgy for xlpe cable?

1538

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How can we find the breaking capacity of a Load breaker switch (LBS) fed from 11 kv supply??ex:50KA, 26kA etc???detailed step vice answer pls.

2068

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How can i get my certificate of competency as an electrical supervisor? I have complicated my B.Tech from Uttarakhand technical university this year (2012).

4551

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What should be the amps for a MV fuses for transformer 630kVA 20(10)/0.4 kV

2101

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If mutual flux is 1.2wb & power factor is 0.8 lag , then what is the Useful flux of a transformer?

4542

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