what the function breaker failure scheme, how is it operated

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why we use star and delta connection?why we donot give the supply directly?

12 Answers   Hitech, Siemens, Tata Steel Limited,

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OUR METER READER TAKE READING OF INDUSTRIAL CONSUMER.THEY ALWAYS ASK HOW TO INCREASE POWER FACTOR FROM 60% TO 99 % TO AVOID PENALTY OF POWER FACTOR.

3 Answers  

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I have a reading off 1.5ohms at my mem my main c/b is rated at 40/6 amps in a domestic house and i was told to change it to a b curve c/b is this ok

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To prevent the mal operation of a differentially connected relay while energizing a transformer, the relay restraining coil is baised with (a)second harmonic current (b)fifth harmonic current (c)third harmonic current (d)seventh harmonic current

2 Answers  

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In CDG type IDMTL realy O/L , E/F, O/C which are used for out going feedrs,on R-phase o/c element, Y-phase , e/f elecment and on b -phase o/c element will be connected . Why the earth fault on center phase only, why not on other two phases?

2 Answers  

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why we ground the scondary of current transformer.

4 Answers  

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Why dc Supply used in Control circuit.

12 Answers   HP,

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How is operate breaker failure scheme in substation

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what is the diffference between 3 point and 4 point starter ?

3 Answers  

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IR value for 30kw lt motor

1 Answers   Hofincons,

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Why dry type cast resin transformers tap link blast in HV side while power shut down times on load?

0 Answers  

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