how to measure earth resistance of a substation

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Explain about c.t?

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what is the difference between c power and U power acb breaker

0 Answers   Radisson Blu,

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What is the name of process In VFD frequency are increase then voltage increase & frequency decrease then voltage decrease?

0 Answers  

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In a simple spur gear train, gears with 24, 48, 32, 72 and 96 teeth are in sequence. The gear with 24 teeth runs at 900 rpm. The speed in rpm of gear with 72 teeth is

1 Answers   Caterpillar,

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I am an electrical power engineer and arranged power system for a data center, I installed MCB, ELCB and erthing system TN-C-S. But some times several ELCBs Disconnect circuits at the same time! what may be the reason? (the ELCBs are 25A ,30mA)

9 Answers  

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In a Impedance Based Distance Relay (Quad Characteristics) - Could there be two different Line Angle(RCA) for Ph-Ph & Ph-Gnd? If So Kindly Let me Know.. Where, What are the advantages of the same?

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what is basic difference between the normal tube light choke and electionic choke ?

4 Answers   Amaron,

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Necessity of transformer earthing

1 Answers  

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Use of switch mode power converter in real-time basis?

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Difference between rating factor of cable and derating factor of cable?

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How much Fault current can be contributed by a motor?

4 Answers  

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