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

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1. What is differential relay? How it operates?

3 Answers  

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why Ac current is alternating in nature?(or)why alternating current changes its direction?

3 Answers   APGenco,

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How does a system control centre in a utility plant gets the grid frequency of the electrical network (50 Hz or 60 Hz)by the SCADA system?

1 Answers  

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what is slip resistance? how much its value in 110 kw motor? why voltage is varied in vvvf drive ?

1 Answers   Reliance,

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Tell me all plants load factors i.e which plant operating on which load?

0 Answers   Bhel,

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What would be the size of wire used for 2 Ton of window A.C?

0 Answers  

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how to calculate sizing of NGTR (Transformer rating,Loading resistor value and Current rating of resistor) and what is the X/R ratio. Details : 11kV,Capacitance 1.73532 micro farads,40kA for 1sec.

1 Answers   Bhel, Indorama, Power Grid,

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Can any one help me how to set an overload set the range from 2.8A to 4A , rated motor current 22A, CT 60/5A

2 Answers  

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what are problems caused by the pdu in rack server

0 Answers  

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what is self commutation how a thyristor discharges through a capacitor and inductor

3 Answers  

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why surge protectetor work explain with the help of circut diagram?

0 Answers  

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