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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,
2460What is meant by load angle of an alternator? Upon what factors does the load angle depend?
VECL,
2962How do the synchronizing lamps indicate the correctness of phase sequence between existing and incoming alternators?
VECL,
2139We 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 3640How much ph is maintained of water electrolyte which is used in LRS for 1200 kw slipring induction motor ?
1721Post New Electrical Engineering Questions
Can any one give an explanation about rating factors of cable? if we are laying the cable on the air with an temp 15 degree then rating factors will be 1.15 and if we are laying the cable on the air an temp 60 degree then rating factor will be 0.76 please describe it and what is the difference between rating factor and derating factor?
what is meant by power and distribution transformer ?
How much should be the load percentage for 15kva Inverter and Iinut & I output load with Calculations
What is the name of transformers oil filteration equipment?
how to find the resistance and gap volatage of the diode??
What is the tube exial fan?
PLS MENTION QUESTIONS ASKED IN IOCL INTERVIEW FOR ELECTRICAL EGG??
What are the advantages of skewing of cage rotor conductors?
what is the diff. between x'mer , isolation x'mer & ultra-isolation x'mer ?????????????
why single CT used in DOL starter power circuit?
For an induction motor wat is the loading/unloading cycle duration or interms of L/UL ratio/ percentage?
If a current -8+6sin6t is flowing three ammeter, one is a centre zero PMMC meter, one is true rms meter and one is moving iron meter. What are the reading of these three meter respectively?
Where is servomechanism used?
Why is the starting current high in dc motor?
What is creepage distance..... what will be the value for different voltage level
