Answer / s.sam jeba singh

50Mohm

Answer / k.prakashchandra

Without armour you can not get the correct IR. Larger the
area of conductor the thicker is insulation layer and you
have to use 500 V megger which will read not less than 5 M ohm.

Answer / utcl

above 10 megaohms

which sub is most horrible in four yr degree

2 Answers  

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roles of owslaw explain?

3 Answers   BSNL,

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The synchronous machine excitation system explain

0 Answers  

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what is direct dischage of power transformer

1 Answers  

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Any one can explain if there is any harm from humming noise heard from air circuit breaker : we have 415 switch board having two incomers from transformers 3.3KV/415V , when bus coupler closed, and open one ACB incomer to work in one of the transformers, the current started hunting around 50 Amps, and heard humming noise from the air circuit breaker, although the load current was only 1200 amps while the ACB capacity is 2500 Amps, and the transformer 1600 KVA. The same didn't happen when taken the other transformer offline. Why this humming noise and current fluctuation? is there any implication or danger, bearing in mind that we just returned everything back to normal and stopped the maintenance of the transformer. Shall we go ahead and ignore this noise?

6 Answers  

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who invented electricity?

20 Answers   L&T,

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why mosquito bat makes noise when it hits with a insect?

2 Answers  

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why power factor is lagging and leading(i.e -1to +1)

2 Answers  

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In Electrical 'Single Line Diagram' cable nomenclature shows "2 X 1C X 630sq.mm to be provided for one incomer. The question is how many cable to be proved for one Incomer.

0 Answers  

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what is the difference between ac and electric

1 Answers  

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what is transformer

5 Answers   Aegis,

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what will happen if ac and dc supplies given

0 Answers   APTransco,

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