Answer / k.prakashchandra

It is the voltage at which supply source changes over to
another.In generator excitation ,intially the excitation is
with outside dc supply in flashes, as gen voltage rises to
70% ,the excitation changes over to gen output.

Alternator rotor earth fault relay circuit

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on whcih cycle does gas turbine works?

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How to calculat the ratio of HT\LT in energy meter

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why DOL starter is use in induction motor as it is not reduce the starting torque

2 Answers   Maruti Suzuki,

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draw the restricted earth fault protection circuit install on power transformer and identify its parameters and draw C/C curve of it

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What is the deference between earth fault & earth leakage

1 Answers  

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A TRANSFORMER 440/400V,DELTA/STAR CONNECTED.THE NEUTRAL CONNECTED WITH GROUND CABLE THAT IS DIRECTLY CONNECTED TO THE PANEL,FROM PANEL IT IS CONNECTED EARTH PIT.IS IT RIGHT? IF IT IS RIGHT LEAKAGE CURRENT AFFECTED.SECONDATY IS PROTECTED WITH EARTH LEAKAGE RELAY.

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1- What is the Polarization Index number be good for 15KV 3c#500MCM electrical cable? 2- Can I use the IEEE Std 43-2000 to perfom the PI test? Thanks

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how can we measure 220kv or more than these voltages ...?and also how can we conform whether we r getting 220kv from generating stations throuth the h v transmission lines?

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take 100kva DTR( delta/wye ), what ll happen if we connect 11kv to LT side instead of connecting to HT side? will the DTR behave as a step up transformer or something else????

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WHAT IS THE DIFFERENCE BETWEEN RESISANTANCE AND IMPEDANCE IF IMPEDANCE IS MORE THAN RESISTANCE AT SAME VOLTAGE CAN WE HAVE RELATION DERIEVED BETWEEN THEM

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What is the material used for the core of a high freiquency transformer?

3 Answers   Videocon,

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