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.

why there is a temperature rise at different metal to metal contact at cable lug??suppose cable is aluminium and the lug is copper,than why the temperature rise takes place??

2 Answers   JK Cement,

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what is meant by fuzzy logic? what is fuzzification and defuzzification?

5 Answers   MEIL, Power Grid,

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1. what is the power factor of a purely inductive load? 2. Which type of transformer connection is preferred in case of power supply transformers? 3. In power transformer usually which winding is closer to the core? 4. what will happen to the generated emf if the no. of poles of an alternator is increased?

5 Answers  

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Why pmg used in electrical generators for excitation.is there any other method without pmg ?

1 Answers  

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what is shunt trip coil? what was the function in rmu?

1 Answers  

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How to calculate capacitor bank value to maintain unity power factor with some suitable example?

0 Answers  

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battery capacity use of made?

0 Answers   JLL, Shankar Electricals,

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difference between ac and dc motor

1 Answers  

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why voltages are added when batteries are connected in series?

4 Answers  

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for same rating of a transformer and induction motor which one will have higher magnetising current flowing?

2 Answers  

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WHAT IS A COLOUR CODING OF 3 CORE CABLE

11 Answers  

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WHAT R THE SAFETIES IN A HIGH TENSION PANEL N LOW TENSION PANEL. ALSO WAT SAFETIES R THERE IN A 200 KVA TRANSFORMER?

0 Answers  

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