Answer / raghavendran

power frequency withstand capability of a CB is its
capability to with any over voltage at system frequency for
a definite period of time say 1min.

Impulse frequency withstanding capability is to withstand
the impulsive voltage levels for a predefined period of
time.say 1.2(rise time)/50 microsec(fall time),100KV
say(impulse voltage level)

Answer / ibrahim

the root mean square (r.m.s.) value of sinusoidal power
frequency voltage that the cb can withstand during tests
made under specified conditions and for a specified time

How to calulate Voltage Drop for perticular lentgh of busbar (Cu/ Al)?

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which one cable has a more resistance.A big or small

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Is it mandatory statutory requirement of transformer oil filtration annualy despite oil is withstanding required dieelectrical strenth and all others parameters

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delta motor winding resistance I take normally single winding is 2.5, which value is came delta connection ie RY ?

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what is meant by the phrase 'static load' in case of shorting in a generator excitation system?

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What should be the values of settling time, peak time, steady state error, overshoot, rise time, MPOS (Maximum percent over shoot) to keep the system in transient state, to keep the system in steady state ?

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How will earthing is making for Aeroplane?

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