Answer / k.prakashchandra

With megger you can find out whether the cable is faulty or
not ,but you can not locate it in the cable ,for which a
separate equipment is available.

Answer / raju

Not Possible.

Answer / arun.kalady84

Using megger we can only find out cable is faulty or not .In the case of HV underground cables , for locating the fault we can use fault locating kit or prelocating kit . using fault locating kit we can pin pointing the fault location, Prelocating kit gives exact fault location im meters by calculation(above 50 mA leakage current is required for 132 KV cables)

1.type of oil in used in transformer.

9 Answers  

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why write 500v on line tester (Test pen)

3 Answers  

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how will i find Transformer rating if supply voltage is 11k.v and how will i find incomer if transformer rating is 12MVA

3 Answers  

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why use delta star x-mer in distribution system.

3 Answers  

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why transformer has more efficiency compare to rotating machine?

3 Answers  

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Short circuit current of 2500 KVA 11/0.415 KV transformer both Secondary and primary side. best regards. Ali

1 Answers  

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We have drive feeding an output contactor for a 5000 hp motor @ 5kV application. The motor FLA is 629amps x 1.25% service factor = 786.25 amps The cable that we current have in place between the drive and the output contactor is 350kcmil- MV-105 (parallel cables). Per the NEC table 310.60 (C) (69). This show the cable ampacity is at 615 amps per cable for a rating of 1230 amps. We have derated the cable for the cable tray and the multiple cables application and our calculations show that after the correction factor factor we are at 922amps. 1230 amps x .75% correction factor factor = 922.5 amps. The customer is driving us to then use another safety factor of .25% off of the already derated cable. Can you please provide a longhand calculation for your solution on this application?

0 Answers   Siemens,

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How i can identify the 220V and 110V power supply equipment? No tag number.

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What value of resistance required between Saftey earth and instrunment earth , maximum and minimum values required

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Whats the use of earth pits? and it will function? whats the natural earth value? How to improve ur earth resistance?

3 Answers   Anwar Ispat,

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why we step down the voltage from 440 to 220 in machines

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What is required of exietation to the alternater.

4 Answers  

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