Why are some relay circuts designed to have the ct current flow through the neutral instead of the phase wire, such as in some diff relays?

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why transformer does not obey ohm law?

27 Answers  

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what are the reasons for overheating in electrical machines?

3 Answers  

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we have a lot of model of rectifier but thyristor rectifier is the most rectifier that use in power system. Do you know why this rectifier is used?

0 Answers  

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what is the criterion for selecting vector group of Transformers ? i mean how to decide vector group of Generator transformer, substation trasformer and transformer at consumer end

0 Answers   Areva,

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Why the arms of delta in a delta-wye power transmission system are kept constant??

0 Answers  

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what is the voltage between nutral and earth?

2 Answers  

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CALCULATE THE TOTAL VOLTAGE DROP AND SELECT THE CABLE SIZE IN MM-SQARE FOR A PANEL-262KW AT 110 METER FROM THE SOURCE SUPPLY , SUPPLY VOLTAGE 240/415

0 Answers   DEWA, Growth,

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Why we use mostly circular coil in transformer? not square or rectangular type of coil.

4 Answers  

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what is means of CLASS in current transformer name plate?

3 Answers  

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Is a contactor (or master relay) required between incoming lines and a VFD? The question goes to safety. If a contactor were used before the VFD and an e-stop engaged then the motor will coast to a stop (i.e. VFD loses power) instead of stopping much faster if the VFD braking fucntion were used. It would make more sense to keep power on the VFD.

0 Answers   Pride Hotels,

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Difference between megger test equipment and contact resistance meter test instruments?

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