what need of NGR(neutral grounding registor)? What it works?

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Name quantities which are not transformed in the tranformer.

3 Answers  

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What is the effect of earth capacitance

3 Answers  

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What are the different types of hydro schemes?

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why capacitor burst?

2 Answers  

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how to select the mpcbs and contactor for 3 phase 30 hp star delta motors.for plc control.and tell me the calaculation for future use.

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Between Turbo alternator and Hydro alternator which one is more difficult to cool and why?

2 Answers  

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why ups rating in kva? and why ups are in parellel?.why isolation transformer is used in ups?

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if main CT is of ratio 50/5, and meter CT is -/5 what will be overall multiplying factor of meter.PT is 11000/110 .

0 Answers   BSNL,

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why dont we connect the two 12 V DC batteries in parallel, for an inverter (UPS)? is there any harm ?

6 Answers  

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IN THE CASE OF AN ELCB, IF THERE IS ANY UNSTABILITY BETWEEN PHASE AND NEUTRAL IT MAY TRIP. BUT MY QUESTION IS WHEN A LOAD IS CONNECTED IN BETWEEN P AND N, THE LOAD CONSUMES SOME POWER AND THERE IS A DIFFERENCE IN NEUTRAL WITH RESPECT TO THE PHASE. THUS ACCORDING TO ME, THE ELCB WILL AUTOMATICALLY OPERATES WHEN EVER THE LOAD CONSUMES-- I KNOW IT IS WRONG. BUT THE SOLUTION IS?????????

1 Answers   KSEB,

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Why LED light has advantage of rapid reflection ,although other lights alse reflect.? and this light is considered to be best for transmission usage in case of Free optics

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