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|What are the earth resistance Standards of 66kv sub
stations according to indian norms.
|we done magnetic balance test for 33KV /440V transformer
in our company , but the ratio out is confusing us
Voltage applied in RY = 440 , at RB = 320 and YB = 60
RY 440 = ( RB + YB ) 380 only
Please let me know what type of problem is it.
|what is pure resistive circuit and pure inductive circuit
|what is mean by PID & Principal of working
|what is meant by slip & where its occur ?
I've just got into my electrical engineering course and I need some help with a question of mine here.
During a site visit, we were shown a main LT panel which has switchgears, ammeters and different kinds of relays and the distribution network from that panel. In the main LT panel I've noted down the current readings as Ir - 163A, Iy - 150A and Ib - 147A. The Line to Line voltage is 415 V at 50 Hz and Line to Neutral voltage is 230V at 50 Hz.
From the above details, how would I calculate the kVA rating of transformer? The primary side voltage of the transformer is 11 kV and the secondary side voltage is 415V and the frequency is 50 Hz.
|what is the maintain in ACB,VCB,MCB,MCCB breakers?
|What is required of exietation to the alternater.
|what is corona
|What happens if a +vely charged particle is placed in the
centre of a room and assume that the north side wall is
having magnetised with north polarity and south side wall
is magnetised with south polarity.
In which direction the particle will move
|which frequency is to be selected for measuring earth
|can you use 400 volt 3 phase and neutral and earth
equipment on 440 3 phase and earth supply safely and if so
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