What is Grounding? any difference b\w earthing? if yes plz explan??

3 Answers   ABB,

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why phase always came one direction in 5pin socket(right hand or left hand) which direction and why..........?

4 Answers   Alstom, L&T,

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I have 4 DG set with 1500KVA rating. system breakers are 11KV & alternator are 415 Volts. Between alternator & breaker one stepup transformer used. i want to Know what is max. resistance for body earthing & 415 & 11KV V Neuteal earthing. my fault current is 14 times for 2 sec.

0 Answers   Jindal,

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is it value of power factor is more than unit. whats effects in the source supply

0 Answers  

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Why do you use an isolator on both sides of the circuit breaker? ( shortly answer)

2 Answers  

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what is basically a pulse transformer?

1 Answers  

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I am doing apprenticeship training at HT switch yard in NLC. How can i get electrical c license. ??? What r the rules for getting it as an apprentice? ??

0 Answers  

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What is Wlak Test in Fire Alarm System????

2 Answers   Emerson,

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One of our gas turbine generator unit "1st stage rotor ground fault" alarm was occured several times. we tried to measure some voltage vulue ground fault protection relay (UNS3020a made by ABB and we measured the value of: Ground: 0.9VDC 5V: 5.8VDC 24V: 23VDC u+: 300 – 350mVAC Rf1: 17.5mVAC Rf2: 17.6mVAC The unit still running and the alarm was reset. As of 6pm yesterday and unitl now no alarm happened again. I our protection relay was defective?

1 Answers  

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in a delta-star with neutral grounding on star side what will happen if one star limb  got opened at star point

1 Answers   NTPC,

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How can two 3 phase transformers of same KVA and Voltage be connected in parallel?

0 Answers   Bernhard Schulte Shipmanagement,

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what is neutral voltage

3 Answers   Power Grid,

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