Answer / sagar sethi

TRANSFORMERS RATING MORE THAN 1600 kVA ARE COMES UNDER
POWER TRANSFORMERS.
TRANSFORMERS RATING UPTO AND INCLUDING 1600 kVA ARE COMES
UNDER DISTRIBUTION TRANSFORMERS.

THESE ARE SPECIFIED AS PER INDIAN STANDARD 10028 (CODE OF
PRACITICE FOR SELECTION,INSTALLATION AND MAINTENANCE OF
TRANSFORMERS PART-1, PAGE NO-4).

Answer / ashutosh

Power Transformer Have High KVA ratings As Well As Its Have
Larger In size . In Power Transformer we provides to the
Air Balst Cooling Or ONAN Type Cooling(OIL NATURAL AIR
NATURAL)
While The Transformer Have Less KVA rating As Wll As In It
We Use to The NAtural Air Cooling Or Oil Cooling

Answer / surendra

power t/f which step down from HV to LV. ratings of the
power t/f is in mw supply is given to this t/f by
generating station or substation. while in the distributon
t/f it step down the suply from 11kv to 440v or 230v. the
supply is directly given to the consumer.

IN MY INDUSTRIES 125 HP MOTOR USED FOR THAT ONLOAD AMPS UP TO 280 SO CAN I USE ONE LOWER KVA DG SET WITH STEP UP TRANSFORMERS THAT MEANS WITH LOW POWER INPUT TO GET CONSTANT HIGH POWER OUTPUT EG:125KVA DG SET = 250 KVA STEP UP TRANSFORMERS

1 Answers  

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WE HAVE A PROBLEM THAT THE MAIN DRIVE OF OUR CEMENT MILL HAS AN EARTHING PROBLEM?TWO OF STATOR WINDINGS INSULATION HAS BEEN COLLAPSED DUE TO AGING PROBLEM.THE PHASES HAVE BEEN BYPASSED AND NOW THE LOAD HAS BEEN INCREASED.WE CAN'T REPLACE THE MOTOR.KINDLY HELP ME BY GIVING SUGGESTION THAT HOW TO MAINTAIN THE STARTING TORQUE AND CURRENT FOR HIGH LOADS.

1 Answers   ACC,

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