Answer / pswin

You ask the value between L,N and E. So I will assume that you will test for single phase and the test voltage must be 500 v scale and full scale is 100 mega ohm.Minimum value should be 0.5 mega ohm between each conductors. If lower than that value, the cable or wire is not certified to use. For three phase, above answer is acceptable,too.

why to use 50hz only in tansmisson and as well as in distribution why not60hz?

2 Answers  

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WHAT HAPPENING TO TRANSFORMER???? i have the step down transformer rating 230/12v, power rating something.,,, ok. suppose iam giving 12v to secondary side,what will happen on primary side.,,,

6 Answers   Coastal Energen,

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please send me RRB electrical engineer previous year questions for Sr. Section Engineer

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how we design a pannel to start 10HP motor with the help of star delta starter?

0 Answers  

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For 7.5kw star delta starter how to calculate 1. Mccb rating 2. Contactor rating 3. Over load relay rating

1 Answers   L&T, MAHINDRA,

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what is the Maximum voltage range for single phase

4 Answers  

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how much allowable resistance that can be difference in motor all coils?

0 Answers  

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how to calculate the speed of a induction motor without using tacho meter?

6 Answers  

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Can we use BS 6651 and BS EN 62305 standards for computer room lightning ptotection in substation?

0 Answers   Jindal,

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what will happen, if both relay contact has live supply, and coil of relay activated

1 Answers   AVS,

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When both contractor star & delta is hold in star delta motor ?? So what happen in this case ??

1 Answers  

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What are the Formula of computing Back up Time of 500kVA UPS with 4 Battery Banks, each bank composed of 43 pcs of Batteries 12V150Ah. How to compute the Back up Time of UPS? We have also 3X500kVA UPS running in Parallel same composition as I write above.

0 Answers  

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