1.what is surge 2.what is lightning 3.what is switching 4.difference between surge,lightning,switching used in power system 4.definition of surgearrestor,lightningarrestor 5.adv and disadv of surgearrestor,lightningarrestor 6.uses and purpose of surgearrestorand lightning arrestor 7.block dia of surge arrestor 8.blockdiagram of lightning arrestor 9.operation and working of surge arrestor and lightning arrestor 10.basic formula of surgearrestor and lightning arrestor 11.basic diagram of surge arrestor and lightning arrestor

1 Answers   Crompton Greaves, Framo, L&T,

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Is there is any difference between AC and DC Cables

1 Answers  

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How to design the earth grid for lightning protection in an industry

2 Answers  

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WHAT ARE THE BELT HORMONICS IN AC MACHINE HOW TO REDUCE IT

2 Answers   DRDO,

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HT/LT PANEL TEST?ALL TEST

0 Answers  

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7- What is the Dissipation Factor and the difference between it and Insulation Resistance Test? 8- What is the task (function) of DC and AC reactors in power plant? 9- What is the task (function) of (open delta with earthed) in some types in transformers? 10- What is the base of the selection of the vector group in transformers? 11- What is the zig-zag transformer and its function by drawing in large detail? 12- What is the polarity ? 13- Why we make short between phase(R) in high side and phase (r) in low side in vector group test? Where High Side ( R ,S and T ) and Low Side ( r ,s and t ). 14- What are the time on delay and time off delay? 15- What is the vector group? 15- What is the task (function) of different types of vector group such as Dyn11 , Dd0 , YNd1,……..,?

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How to calculate the FUSE rating?

2 Answers  

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i have 90kw motor.so i choose connect cable .please what is parameter checked so please give to formula

0 Answers   May Baker,

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a motor's measured current is 45amp,whereas the rated current is 38 amps but still it is running ,how?

5 Answers  

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what is meant by power factor ?

17 Answers   Harita, Pricol,

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define digital electronic

0 Answers  

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hi frenz,its aswathy.i hve aplied for the hpcl test on feb,pls send the test patern & the placement papers as soon as possible. mail-id :kjaswathy@gmail.com

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