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describe the phenomena of vacuum interruption in C.B
what is the relationship between current&voltage in practical purpose ?
How to calculate per unit impedance of transformer?
A 3-PHASE TRANSFORMER IS USED TO STEP-DOWN THE VOLTAGE OF A 3-PHASE, 11KV FEEDER LINE. PER-PHASE TURNS RATIO IS 12.FOR A PRIMARY LINE CURRENT OF 20A, CALCULATE THE SECOUNDRY LINE VOLTAGE, LINE CURRENT AND OUTPUT KVA FOR FOLLOWING.A)STAR- DELTA.B)DELTA-DELTA.
please write motor, transformer, Generator setting, fault level calculation of Tr.etc
why single phase to grd test in HV cable?why not 2 phase at a time?
can we do the star delta connection of capacitor for 3- phase motor starter.
Main advantage of auto transformer over two windings transformer is that A it needs no cooling B it uses only one winding C core losses are reduced D it has simple construction
why transformer ratings in kva? & DG ratings in kva? & Motor ratings in kw/HP?
what will happen if there is a voltage leakage or current leakage in an electrical train
What is meant by system?
Why is the frequency not changed during transformation of electrical energy in a transformer?
how does an encoder work???
WHY EXCITER PHASE SEQUENCE ARE OPPOSITE THAN STATOR SUPPLY PHASE SEQUENCE IN SYNCHRONOUS MOTOR >
How we can come to know the substation range,without go through any name plate ?