will three phase energy meter run without one phase

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what is the difference between Central Battery System and UPS in applications and uses? and why UPS suitable for Computers and central battery for emergency lighting?

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i need 24v dc from 230v ac supply how we can getit ? what are the devices &its rating requied for that ? plzz i need answer urgently .thank u

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What is the accepted limit to increase the choosen transformer capacity over the load and why ?

2 Answers   Asec,

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If a earth leakage circuit breaker trips is it possible to tell which house circuit breaker (I have four) is the faulty circuit?

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What is the name and type of power transformer oil?

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what is ground fault current? is there any current flow takes place through ground? is it possible? if it's possible whether it affect human beings on earth near the fault or not?

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As per the theory current doesn’t flows in Neutral, but practically it is not applicable, explain why?

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What is the use for cable entry in control room?

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What is disadvanage if power factor goes to in leading..?

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why generator and t/f ratings given in kva & motor rating is in KW?

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DESCRIBE THE CONSTRUCTION ANDOPERATION OF BELT CONVEYORS AND SCR CONVEYORS , DRAW NEAT SKETCHES

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