why are we using resistor in NGR ?

1 Answers  

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What is the accepted limit to increase the choosen transformer capacity over the load and why ?

2 Answers   Asec,

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what is the pperating squvance in transmission line for circuit braker, isolater & earthing switch.

2 Answers  

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How to calculate ht side cable of 630 kva oil cooled outdoor transformer?

1 Answers  

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What is an electric arc?

3 Answers  

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Tell me the reason of connecting domestic t/f primary in star or delta,and also secondary side.

0 Answers  

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How to calculate Earth busbar size & what is the procedure we make for determine that?

1 Answers  

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IF we want to replace I/C bay at our 220 kv substation which is of 140 mw load capacity bay to be replaced by 400 mw capacity bay.other than CT(1200/1) what are the other equipment i have to replace.

1 Answers   Jindal,

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Please give me the formula stating relation between AC & Dc.

2 Answers   JP Group,

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what is disadvantages of high power factor

4 Answers  

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In Power Line Communication (PLC) the wave trap is used to block communication signals from entering neighboring lines. My question is this: Why do they allow for different filtering arrangements on these wave traps? Isn't it always going to be a low pass filter since we want the power frequency to go through, and the comm signal blocked?

0 Answers  

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length of 4 core cable 95mm from substation LV VFD panel to Motor at field approximately 150 meter. Motor stop and power has been isolated from LV MCC ( Substation )to disconnect Motor for services. After Motor completed service propose to reinstall and reconnect Motor Cable, found earth cable sparkling during touching at metal / motor body. Inspect by clamp meter found earth cable have current flow AC 1-2amps and all earth cable at MCC LV also have current flow as same value. why it is happen?

2 Answers  

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