What is mean by hot and cold loop testing?

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What is the main purpose of relay?

1 Answers  

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Which type of DC generator is used for electric welding purposes and why?

1 Answers  

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my question is Megger of cable insulation or swgr board meggerring some values in one day 50mohms,some other day checking different values(20Mohms). this tell that some person tell that that values ok. how to identify the megger value is correct. pls tell me the answer.

2 Answers  

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what is difference between earthingpits,earthing grid & earthing mess?

0 Answers   TATA,

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what is principle operation of transformer?

9 Answers  

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When placed close together, two positively charged materials will

1 Answers  

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please explain me about traction application?

2 Answers  

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What is the output of 25 kva 11/.4 kv transformer in kw ? Plz generalized it...

3 Answers   NTPC,

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Dear Mr B C pal...Can you plz. put some light on principle of operation of Z-Ct in conjunction to its use with 1Cx1000Sqmm HT Cables & Directional Ground Fault / Over Voltage Relays...Regd..Parag v K 9899115632

0 Answers  

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in thermal overload relay class 10A indicate what

6 Answers   Reliance,

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i want to know is it possible to generate usefull power by coupling generator with motor & supply gives to motor by battery source then generator generates power. remove the battery source given to the motor & feed the supply from some of the generated power supply to the motor & motor runs continously. generator generate power contnously.is it possible ?

5 Answers   UltraTech,

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