Why earthing is required, and what effect in earthing result is more than 5 ohm and less than 5 or equal to 0 ohm

2 Answers  

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why vacuume circuit breaker is not used for EHV

3 Answers   College School Exams Tests, Crompton Greaves,

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What are the conditions for sustained oscillator or what is backhouse criterion?

0 Answers  

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In a 11kv/433v transformer,at the LT side ie 433 V side why do we need to put 3.5 core Cable upto Panel.The full load rated Amps is 666 at LV side.What value of current will flow through the Nuetral Conductor.Why can't we use 4Core Cable instea of that?

2 Answers  

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what will happen if multimeter(selector switch at DC voltage) and terminal at current is connected to DC supply?

0 Answers  

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some ac motor's direction get change dueto ghanging input to the ac drives.(say ryb to rby). but some motor direction remains the same when phase sequence is changed fromdive side. can anybody guide me?

1 Answers  

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how many typetesting of transformers?

8 Answers   ONGC,

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how to generator maintenance (A Check, B check,Etc)

0 Answers   Cummins, HCL,

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How o select the electrical fuse?.What are its characteristics.How to select the material od fuse?

0 Answers   BARC,

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Is it true that IPT are more accurate than CVT for Measuring purpose?

2 Answers  

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what is meant by surge? what we called for high currents?

0 Answers  

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what are the types of 3-ph. generator protection

2 Answers  

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