IN 6.6KV 3 phase switch gear .i will give 6.6kv to R phase only to earth in during H.v testing (through H.v KIT).what happen remaining phases.how much voltage get remaining phases.why? explain.

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Which rccb 30ma,100ma,300ma sensitivity should be used in domestic line and what is difference, advantage and disadvantage of all three

2 Answers  

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Is there any reason that a vertical motor can not be mounted horizontally ? I happen to have one and would like to use it horizontally to save money by not buying a new horizontal motor.

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how we can select MCB ratings according to Voltages, Curves.

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What is Delta Connection? What is meant by Forward Delta & Reverse Delta & How Will be the Connection in Power Transformers?

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What is the difference between ARC & SPARK?

4 Answers   OPTCL,

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In an alternator running with a balanced zero p.f. lagging load, phase differernc between the resultant armature flux and main field flux is always____? options is 180 degree....why?? explain.

1 Answers   BREB,

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how can we change the polarity of Alternating current rapidly? how frequency of ac can be controlled and changed easily?

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How the size of electic machine vary with the sped? Between slow and fast running machines of equal ratings, which one is more economical to design?

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What is the use of Exciter in generator? & what will be the current of Exciter in 500 KVA DG Set?

2 Answers  

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why we use separate earthing for two seprate machine??

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We have a bank capacitor rating of 60 KVAR for a overall load of 160 KVA and we have connected three loads of 50KVA each. We would like to auto matically correct PF using APFC. How do we design it?

2 Answers  

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