Answer / subaharan

first check the transformer bushings and their condition,then
you meggering the transformer each phase to phase and phase to
earth.
power cable you check the high voltage test which is used for
measuring the leakage current,meggering and continuity
checking.
switchgear the same meggering,isolator checking,relay
testing(set various values of currents,voltages and set time
for tripping) make the fault and note the trip time.

what happen if power factor goss to above unity (one) ? of any electrical system or motor.

10 Answers   Air Liquide,

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WHAT IS DGA TEST FOR THE TRANSFORMERS.

3 Answers   ABB,

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what are the functions of fuse ?

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what is reactive power ? what its role in transmission lines?

3 Answers   Thermax,

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EXPLAIN THE APPLICATION OF RECIPROCITY THEOREM

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What is the function of Antipumping Relay and Lockout Relay?

1 Answers  

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hello friends.. I have a doubt regarding the operation of dc machines.. I studied in a text book that a dc machine can be used as a generator and as a motor.. is this possible? If so,please send me the info about this topic.. you can also send your info to my mail.

0 Answers   Bhel, CVL,

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How we can calculate the consumption in kwh of motor on basis of kw @100% load, @50% load & @ no load.

0 Answers   Grasim,

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how did the testing of protection relays done through current injection

0 Answers   Bhel,

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The gauge indicates the number of amps, but what about voltage? How voltage rating (for wire or fuse) determined?

0 Answers  

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