what is post close & pre close of trip circuit supervision relay in circuit breaker control scheme?

2 Answers   ABB, NEK, Power,

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why we are using DC supply for all protection relays, why cant we use AC supply..???

1 Answers  

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how to select energy meter? have any calculation?

0 Answers  

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During the transients in alternator,the mechanical power input remains almost constant while the electrical power output changes significantly.Why?

1 Answers  

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I AM COMPLETED DIPLOMA IN E.E.E. AS WELL AS B.TECH IN ANDHARPRADESH.. HOW I THE Certificate of competency as Electrical Supervisor.

1 Answers  

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what is power ratio between star & delta connection of 3 phase induction motor

1 Answers  

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Why the transmission lines are in 11kV, 22kV, 33kv, and why not 10kV,20kV, 30kV?

2 Answers   Bhel,

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1.wat is the negative slip region in the motor?

1 Answers  

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What is NUMBER OF RUN for power cable means?

4 Answers  

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If the secondary winding will be open in current transformer, how to damage the insulators

2 Answers   TPDDL,

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can we choose current transformer secondary, to calculate residual flux in a power transformer, so as its saturation is close to the saturation level of power transformer?

0 Answers  

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How is the resonant peak, resonant frequency, and bandwidth determined from nichols chart?

0 Answers  

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