Answer / selvakumar.t

When generator breaker opened at full load. Subsequently the
generator prime mover will go to over speed.We can use place
the breaker between generator and transformer through bus
bar. Because transformer was transmitting the power only.

Answer / e.subhash

Not necessary, because generator is synchronising hence we need bus only.

Answer / pallab phukon

when a generator is disconnected from supply when it is
running at full speed,there will be mechanical vibration in
the rotor and may even break.so,if a generator should be
disconnected,we have to at first reduce the load.

I have one ct of ratio 3000-2000/1 Amp its knee point voltage mentioned on name plate is 500-333/30mA-50mA at Vk/2. in secondary box there is three terminal named 1S1, 1S2, 1S3 then on which terminal obtained the knee point voltage ie 1S1-1S2 OR 1S1-1S3 & also specify the knee point voltage for the ratio 3000 from name plate.

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what is effect of reverse c.t connection on metering.

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how to calculate optimum loading for transformer?

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how you taken aotitude test

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I have a generator of 300kw.400V,50hz . what is means can i assume the load Red Phase with Neutral 300kw.Yellow phase with neutral 300kw and Blue with neutral also 300Kw. or - red with neutral 100kw same as yelloe and blue phase also giving 100kw with neutral respectively

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how to calculate the cable size for LT and HT power cables with detail explanation?

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