what is lightning arester?generaly which type of used in industeries? why its used?

7 Answers   Essar,

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Why voltages are 11kv 33kv why not others?

2 Answers  

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i want prepare power grid exam what are book we want refer for electrical ?

5 Answers  

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when a primary current injection test is required, it is accomplished by what?

3 Answers  

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What is difference between Earthing, Ground and Neutral?

1 Answers   ABB, ABC, Indo Asian,

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HOW TO CALCULATE HV CABLE SIZING?

0 Answers   KNPC, L&T,

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Why do we use copper cable for HT Supply and why not Aluminium?

0 Answers  

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I try to check the three phase voltage in multimeter, in 125A isolator switch incommer. first i touch R phase, and then i touch Y phase using multimeter, the moment i touched, it blasts and that moment i got blindness. multimeter selector position is correct(750V AC MODE AND RED PROBE WASS IN v AND BLACK PROBE WASS IN COM. MODE. COULD ANYBODY GIVE ANSWER FOR THIS TO AVOID FURTHER ACCIDENTS PLEASE?

2 Answers  

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What is the minimum underground tank size capacity considered for firefighting purpose?

0 Answers  

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why cant we use earth as neutral at home whereas neutral is actually grounded at transformer end?

4 Answers  

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how wud i know that whether i have to use unitized package substation or transformer?

1 Answers  

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if an alternator or turbine using fuel to produce ele energy and we didn't connect load to the ends then where was gone the ele energy

2 Answers  

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