Answer / pichumani

IS3043 / 1987 for earthing

what is difference between earth fault& restricted earth fault.

3 Answers  

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i have 2 motor of same rating. on no load condition one motor take 1.6A but other motor is taking 4.8A. what is the reason of this. please explain with proof.

8 Answers   Ambuja, UltraTech,

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if we want to convert the two 12 V DC batteries in parallel for UPS ? what would be the result ? which is better for a UPS , connect two batteries in series or connect them in parallel ?

2 Answers  

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I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?

0 Answers  

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What is core CT & it's function?

0 Answers  

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What is a DC series motor?

0 Answers   Ericsson,

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why do you add the load short circuit impedance when considering short circuit amperage. It seems that you should only consider supply. If you need to consider loads and you don't know what loads are to be added , what would be a good sub-transient reactance rating for the loads?

0 Answers  

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I've descovered that when the earth wire in a domestic electrical installation is not connected back to the board (ground) a voltage of between 9-24v is is found to be present in the earth wire. When connected at the board there is no voltage - is this normal and why does it happen?

3 Answers  

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What are the effects of armature reaction on a DC machine and discuss the various methods to reduce the effect.

1 Answers  

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How can I calculate the trnaformer effciency at different loading condition?

2 Answers  

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1.What will be stored in online ups EPROM IC?

0 Answers   IBM,

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what is the difference between switch yard to residential area.and how much required it.

0 Answers   GVK,

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