During Testing of Maintenance Free Earthing, How deep should be the Spikes of Earth Test Meter should be inserted in the soil(one spike is 15 Meter & Other spike is 30 Mtrs away from the Main Earth Electrode. Because, recently, we observed that when spike is inserted 3-4 Inch in the earth- results are better, If spike is inserted 1 feet deep than results are increasing.

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1)we r having one problem .one dry type transformer(6.6KV/433V)is taking high magnetizing current on delta connected HV side of "U" phase when compared to other two phases.could any body tell the reason why it is happening? 2)why CT secondary side protection core has got higher winding resistance when compared to that of metering core of same CT?

2 Answers  

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What happen to the transformer if the OLTC frequently used for lower and raise occured 50times daily?

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At what factor resistance r of a conductor depends?

0 Answers  

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Why in DC drive u r using in Klin operation in Cement Plant?

7 Answers  

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how to calculate earth fault relay current and CBCT ratio

0 Answers   ONGC,

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WRITEDOWN FEW RELY CODES

0 Answers   Equate,

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HOW TO CALCULATE THE ILLUMINATION IN INDOOR LIGHTING?

0 Answers   L&T,

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can we use 220 volt 15 w a.c. lamp on 220 volt d.c.

11 Answers   Philips,

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1kva = kw ?

6 Answers  

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what is differance between dirty earthing and clean earthing and their applications

2 Answers   CB&I Lummus,

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how we are measuring the import and export power?

1 Answers  

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