directional over current relay when acted & how it works

3 Answers   NCC, ThyssenKrupp,

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How can we measure earthing resistance test (Earth meggar) of Transformer neutral pit while in live condition?.

0 Answers  

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what is the current density of copper & alluminium.

0 Answers  

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WHAT SHOULD BE THE MINIMUM IR VALUE FOR LV (380V) CABLES ACCORDING TO IEC/IEEE.

3 Answers  

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What is the Working principle of ELCB and RCCB?

1 Answers   Geo Miler, L&T,

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If the t/f capacity is 500KvA then what is Amps ratting of the main breaker.

5 Answers  

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why we define potections of Tourbo generator in Class A & B.

1 Answers   GIL,

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as per BIS supply voltage in India is ......

9 Answers  

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what is full form of lv and mv? 2.while we connect capacitor to generator what will cause for it?

4 Answers   ABB, Wireman,

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why CT output is always raetd 5.regardsof primery curre.

3 Answers   ABB, BARC,

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WE HAVE A PROBLEM THAT THE MAIN DRIVE OF OUR CEMENT MILL HAS AN EARTHING PROBLEM?TWO OF STATOR WINDINGS INSULATION HAS BEEN COLLAPSED DUE TO AGING PROBLEM.THE PHASES HAVE BEEN BYPASSED AND NOW THE LOAD HAS BEEN INCREASED.WE CAN'T REPLACE THE MOTOR.KINDLY HELP ME BY GIVING SUGGESTION THAT HOW TO MAINTAIN THE STARTING TORQUE AND CURRENT FOR HIGH LOADS.

1 Answers   ACC,

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Why the earth to phase voltage is high 250 compare to other two phases

0 Answers  

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