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How to calculate the value of earth capacitance in a transmission line.

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what r substations?what r there work?why voltages r incresed and then reduced during distribution of power

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my 10 hp submersible pump is tripping when connected through ELCB.I have checked the megger value of the coil's with body.It was found to be 0.2mega ohm.that is leakage is there.But when connected to mccb it is not tripping.no leakage current in the motor.Is it safe to connect to mccb? what are the problem's will arise if future?also tell me in ELCB no neutral is connected to motor.than how ELCB was working?

1 Answers  

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onan full form

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Is the installation of the filter cloths necessary before spreading the gravels at the transformer yards?

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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?

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What's ND relay & it's functions?

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what is the difference between vector scale and vector diagram?

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Three phase star connected PT transformer primary side one phase fuse is blown what will be the output in secondary side(Secondary side also three phase star connected)

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All we know about T/R, Is it possible to make T/R primery singlr phase and secondery three phase,If it then how?... Need Description

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what is the function of step up transformer?

2 Answers   DEWA,

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DEAR ALL I have motors ( 10 units )each one is 90kw 380V 50 HZ 1000rpm but new local pwer is 220v 60 hz requierd rpm should be 1000 pleas what the beast solution is used frequncy converter or rewinding all motos or chang all motors thanks

6 Answers   GE,

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