Why derating factor os applied on Cables?

0 Answers  

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What device is use for metering current at lt consumer end..??

2 Answers   Power Grid,

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In dc motor starter there is less voltage required for holding contactor that's may why it is called no volt coil. but in ac starter why holding contactor is called no volt coil.

2 Answers   JSW,

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Which one is correct mVA or MVA. Whether both the units are same for the transformer

10 Answers   Areva,

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what are the parameters plays a major role in Potential transformer Burden calculation??

0 Answers   ABB,

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wha tis the ac motor used for traction system

4 Answers  

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Which of the following statements is incorrect?(a) 1N = 1 kgm/s2(b) 1V = 1 J/C(c) 30mA = 0.03A(d) 1 J = 1N/m

1 Answers  

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how to calculate the conductor size for certain KV transmission line and distribution line?

0 Answers   Hyundai,

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why the earth pin in a 3-pin socket is longer and thickest?

5 Answers  

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why not phase to phase fault occure in raining day in hv sub-station?

1 Answers   Getco,

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Star Delta Diagram with full description

0 Answers   SKS Microfinance, Syscom,

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Please clarify, 1. Is it required to lay two runs of GI wire along with Armoured LT cable if it is laid between one big mains (63Amps TPN SDF) to small main (32A TPN SDF) with proper glanding termination? 2. If the armoured cable with proper glanding is laid from DB to CNC machine, is it required to run two runs of body earthing to the Machine from DB? 3.If the armoured cable with proper glanding is laid from Substation to Hangar, distance is approx. 100 mtrs, is it required to do earthing at shop area though the primary termination at substation is earthed through gland.

0 Answers   HAL,

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