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Why Lightning arrester used? Can we use piece of iron as a
core material of transformer, if No, why? In CRGOSS
material what is meaning of cold rolled grain oriented? Why
Impegrenation of Transformer is done? Properties of
Insulator? what is phase angle? Testing of transformers
(Routine & Monthly)?
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protect from Earhing strok
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Difference between shunt, PMG and AREP excitation. Which is the most reliable between PMG and AREP.
I want formula to calculate current loss with distance in km.I searched many sites but didn't right answer.Plz reply me
If more than rated DC voltage appears across trip coil of the breaker, what will happen? e.g. in 110V DC circuit system, if voltage across battery terminal showing 121 V
what is a synchronizing lamp ?
What is the difference between multimeter
If 24 KVA AVR having Input voltage 200-400v, Output voltage 415+-1%, what will be the voltage if Load is 13A.
what is meant by CT`s saturation ? Can we use Metering CT`s with Protetection CT`s ?
Why control of DC motor is simpler?
what is the effect of change in supply frequency on load angle of synchronous motor,all other parameters remaining same?
Mention how NPN and PNP transistor works?
what is the sludge current
what is formula for calculate thermal overload in new numiricalrelay( not in bimetal relay)?
Whether the vacuum contactor requires Short circuit protection?If No,why?
How the annunciator works ? How to do its wiring
How to know vacuum in vacuum cylinder of breaker in working condition
