Answer Posted / rajkumarvelu

Harmonics are generated by non linear loads like VFDs,
Rectifers etc.
There distort the fundamental wave forms resulting in poor
power quality.
the harmonic currents flow in the neutral resulting in
heating losses
Even if the harmonics say 5th 7th are more, negative phase
seq currents may flow resulting in mal operations of relays.

What is a Phase shift meter? Where can I get one?

2288

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sir i ve applied for hindustan petroleum and power grid india ltd..and the exams on feb 22.can you pls send model papers and tell how to prepare for those.i need to get into any of these for sure.....

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when ac current flows thru d coil of a contactr,it energizes,magnetic field attracts d contact of the coil...nw wont dt ac current in d contct induce current back on to d coil thru mutual inductance leading to high currnt in d coil

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Difference between rating factor of cable and derating factor of cable?

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testing of Vector Group – YNaoD II

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Can i use the B-curve MCB instead of C-curve MCB

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which mm cable should be used for 1.hp immersible pump motor for the distance of 330 metres?

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what is a vector protection in transformer

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Write the current equation in series RLC circuits.

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what is the reason the main breaker is trip during the motor is running? (some time the breaker is not trip)

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what type of questions are asked and howmwny questions belong this catagory?

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what is static frequency converter?what is the function...of sfc...?

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What happened if C.T mount at any cable or Bus bar in wrong direction . C.T going on proper work or not . C,T direction is essential thing to properly work.

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