Answer / ram

1. switch on the elcb. press the test button on the elcb.
it should trip.
2. switch on the elcb. connect test lamp between earth and
output phase of the elcb. the elcb should trip.
if fails in both the condition the elcb is faulty.

why earth hole size is biggest in socket point.

5 Answers  

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what will happen if the connections of protection ct reverse? will it burn the ct?

2 Answers  

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I am an electrical engineer, I found variation in KWH between DG and EB for Same load for same duration, can any one help me why this variation arises?

1 Answers  

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what is field flash

4 Answers   Bhel,

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what are types of servo motors

1 Answers  

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WHAT TYPES OF OIL(STRUCTURE) ARE USED IN POWER TRANSFORMER INSULATION?

4 Answers  

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The neutral&earth voltage is 0v.But we were connected the lighting load at the time ballast was failed.why?

1 Answers  

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can some one clearly explain why -48 volt DC use in telecom site????

0 Answers  

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1.why ACB is not connected in HT side what Happens? 2.how much voltage maintained in ACB breaker? 3.OLTC is connected in primary side in case secondary side connected what happened?

3 Answers   L&T,

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What is the difference between Isolator & Load Break Switch?

7 Answers   Infotech,

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why reactive power produce in generator? why inductive load absorbe reactive power?

2 Answers  

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Explain advantages of storage batteries

0 Answers  

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