What is the difference between vector surge relay (78) and Pole slip relay (98G)

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As per IS why should the control be taken only from R phase, why not from B or Y phase??!!

2 Answers  

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Any website for objective type questions of electrical engineering ?

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WHY WE ARE DOING THE EARTHING IN A SYSTEM. SOME PEOPLE ARE TELLING FOR PROTECTION. WHAT PROTECTION GIVE ME THE CORRECT ANSWER.

2 Answers  

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Define availability (operational)?

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where was current transformer protection units used and why??

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what is the difference between 50 hz freq. and 60 hz freq.? which is better and economic in them ?

0 Answers   Faurecia,

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hi,every one, i have to write the search paper on "performance policy optimization" of NGN (next generation networks). i need the material on this topic. can any body help me. please tell me any useful site where the good material is available and name of any reference book. it should be a great help for me.

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what should be the value of helathy insulation b/w two cores of LT cable.

2 Answers  

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how system voltage affect the power factor or vice-versa.

4 Answers  

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

35 Answers   Auko Tex, Integra, PowerTech, Shadhin Group,

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Why induction motors draws higher current during starting condition?

1 Answers  

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