A 500 V shunt motor runs at its normal speed of 250rpm when the armature current is 200A. The resistance of the armature is 0.12 Ω. Calculate the speed when a resistance is inserted in the field reducing the shunt field to 80% of normal value and the armature current is 100A.
VECL,
2006What is meant by load angle of an alternator? Upon what factors does the load angle depend?
VECL,
2556How do the synchronizing lamps indicate the correctness of phase sequence between existing and incoming alternators?
VECL,
1553We have 11kV/110V three phase indoor potential transformer in 66/11kV Sub-station, where the failure of PT is frequently happening and the rating of the PT is 0.2 class accuracy, with primary star and seconday (two cores) star connected. Some experts has suggested to not to connect the PT Primary neutral to the ground because when transformer neutal NCT connection is loose; the faulty current will flow through the PT primary neutral, resulting into failure of PT. My question is: Is it necessary to remove the primary neutral connection of the PT from ground? if not, what would be the reason for failure of PT. Please guide me.
2 2793How much ph is maintained of water electrolyte which is used in LRS for 1200 kw slipring induction motor ?
1242Post New Electrical Engineering Questions
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