Answer / vipul

Grabels are used for during leakage the oil may be dump to
dranage and it prevents from fire.
to prevent from vegitation (grass).
To avoid step / touch potential.

Why Diffrential and Ref relays are used together although Diffrential relay can protect Pri and Sec of Transformer

1 Answers   Qatar Gas,

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what is the diff b/w HP and KW

10 Answers  

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What is Rough Balance Busbar Protection

1 Answers  

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What is minimum permicible value of leackage current for LT Panle when applying voltage up to 3 KV for 5 Minuits?

0 Answers   BFL,

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What is meant by impedance? difference between high & low impedance ?

0 Answers  

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why wound rotor is star-connected?

4 Answers  

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What should do when induction motor take more load in single phase ?

1 Answers  

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why induction motor always operate at lagging p.f.?

4 Answers  

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Why screen of the screened cable not earthed on both the ends of cable

1 Answers  

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WHY IS THE POWER FACTOR NOT MORE THAN UNITY.

6 Answers  

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What happens when reactive power enters a system?

6 Answers  

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What is the differance between negative dc voltage and positive dc voltage because some circuit uses -24,-5,-12,- 15,volt dc supply

10 Answers   eLab, Hero Honda, NTPC, Suzlon, Teradyne,

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