ELCBs are installed for protecting humans from AC leakage current.Is there a device which protects humans from DC Leakage current??e.g.leakage from batteries...If not,then why so???

1 Answers  

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how to choose cable size with respect to load? how to convert cable size in mm2 to sq.mm?

2 Answers   MSL,

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Why we use auxillary relay ? what is function of differential relay, directional o/c relay?

0 Answers   Century Rayon, Mechanical,

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if a motor is running at 1500rpm then how you can find its HP

1 Answers   Construction,

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Which type of air compressor is used now a days in the market. Keeping in mind of energy efficiency and maintenance points. Relevant documents may also be sent on mentioned email ids.

0 Answers   DAE,

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what kind of motor is used for lifting applications

5 Answers  

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If short circuit ratio is high is it bad or good for a machine then tell the reason...

0 Answers   Bhel,

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Can any one give an explanation about rating factors of cable? if we are laying the cable on the air with an temp 15 degree then rating factors will be 1.15 and if we are laying the cable on the air an temp 60 degree then rating factor will be 0.76 please describe it and what is the difference between rating factor and derating factor?

0 Answers  

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why synchronization done in clockwise direction?

12 Answers   Hindalco, NTPC,

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What is load shedding?

1 Answers  

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funtion of choke

4 Answers   L&T,

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What is phase cross over frequency?

0 Answers  

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