Which supply is using for train AC or DC & what is the
voltage????????
Answer Posted / annu
IN INDIAN RAILWAY 25000V SINGLE PHASE AC SUPPLY IS USED
WHICH IS CONVERTED IN D.C THROUGH A RECTIFIER SET BECAUSE
IN ELECTRIC ENGINE WE ARE USING DC SERIES MOTOR AND FOR
THIS WE NEED DC SUPPLY . CAUSE OF USING DC SERIES MOTOR IS
THAT ITS STARTING TORQUE IS TOO HIGH IN ALL MOTORS.
Is This Answer Correct ? | 80 Yes | 1 No |
Post New Answer View All Answers
sir i applied for hpcl(electrical).i want to know from which subjects most of the technical que will b asked.and pattern of the written test.pls help me
what sort of general awareness questions are asked in o.n.g.c entrance exam?????????????????
What is a dominant pole?
Why are iron cores in transformers made laminated?
What is meant by Low Resistance Cable and High Resistance Cable.
what are the advantages and disadvantages of speed control of 3 phase induction motor by varying frequency explain with drawing
what is the transformer rush current?
We have Diesel generator of 200KW. fuel consumption is always same,even connected light load or full load. Is it right?
WHATIS TIME CONSTANT? WHATIS ITS SIGNIFICANCE? ILLUSTRATE THROUGH EXAMLES.
how we test a 3 phase motor on single phase supply....? HOW WE RUN A 3 PHASE MOTOR ON SNIGLE PHASE. supply for testing..? how we verify of a 3 phase motors 6 wire & name thame a1/a2/a3..b1/b2/b3 and c1/c2/c3 for connecting star delta starter ........i have only 1 phase supply ? help forum..........
define hysteresis loss, eddy current loss and windage loss
How will polarity test of Dy5 Transformer ?
What is the effect of positive feedback on the stability of the systems?
why to use freewheeling diode ( diode in revers bias mode) across dc coil
How to select batteries required for ups and the inverter if we Known load? And how AH is selected of battery?