Answer / k.prakashchandra

In case of LT ,it is the the neutral wire and in case of HT
,the earth/ground is the return path for earth fault current
upto primary of UGT which is delta/star connected.Beyond UGT
earth fault current causes imbalance in phase currents of
gen,resulting tripping of gen on earth fault relay.

why there is 1 phase and 3 phase but not 2 phase and 4 phase?

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whenever a squirrel or a crow gets tangled near the out put of the feild transformer there is a discharge of 440 volts of current through the neutral due to which my appliances blow up causing a huge bang.will the RCCB help in these conditions

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how i define power factor when some one ask me ,,,,,what is power factor ,,,,,pleas define it simple. (pleas dont use these worlds ,,the difrence bitween apparent power and actual power is power facter )

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How to test transformer

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Active power= VI COS FI But incase of leading power factor ( more than unity), may we use other formula ? because the cos fi (value of cos thita) should not be grater than one.

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is there any phase difference occurs while primary and secondary side mutual induction occurs?

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A 7 storey building has a floor area of 35,000sq.ft on each storey. On the ground floor 11KV electrical sub-station is to be erected. A load of 3kw for every 400sq.ft (p.f is 0.8) is proposed for each floor. fire pump 7.5hp, water pump 5hp, lift 2 nos, each 10hp and 20shop load of each shop is 5kw. calculate a. load each floor b. total load of building c. L.T feeders for aech floor and from transformer to main. d. distribution diagram e. capacity of sub-station/capacitor bank f. line diagram

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What is an ideal transformer?

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how much winding resistance of 0.75kw to 12.5kw 3ph sqwiralcage induction motor?

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how to reduce the transformer size in ups ?

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1)we r having one problem .one dry type transformer(6.6KV/433V)is taking high magnetizing current on delta connected HV side of "U" phase when compared to other two phases.could any body tell the reason why it is happening? 2)why CT secondary side protection core has got higher winding resistance when compared to that of metering core of same CT?

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what is difference between induction motor&servo motor.what r types of servo motor?how it works?

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