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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,
2512What is meant by load angle of an alternator? Upon what factors does the load angle depend?
VECL,
3004How do the synchronizing lamps indicate the correctness of phase sequence between existing and incoming alternators?
VECL,
2181We 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 3752How much ph is maintained of water electrolyte which is used in LRS for 1200 kw slipring induction motor ?
1769Post New Electrical Engineering Questions
How to configure the drives in PLC, through Profibus commnication. And to how to address it?
i have completed deee and i've (June2012-feb 2015 experience in electrical maintenance in pvt ltd company.company having HT & LT electrical power.how to apply electrical C-license ,NOW I was resigned my job,what are requirements of applying for c-license
Whata are the types of Cables?
During Testing of Maintenance Free Earthing, How deep should be the Spikes of Earth Test Meter should be inserted in the soil(one spike is 15 Meter & Other spike is 30 Mtrs away from the Main Earth Electrode. Because, recently, we observed that when spike is inserted 3-4 Inch in the earth- results are better, If spike is inserted 1 feet deep than results are increasing.
Why GRR starts from 60% of motor speed why not less than 60%?
What is meant by vector group
what is per unit calculation?looking for simple and strong explanation thk u
What is the difference between rulling span and wind span of of an Over Head Transmission Line?
what is smart grid? why we use it? explain in detals bcoz i want give presentatin from it....
how ct burden,magnetising current,ratio and knee point voltage are related & derived
How to Prepare preventive maintenance shedule of machine tool.
Why phase sequence must be same in any ht motor or generator circuit?if phase sequence doesn't same whatever will be affect on circuit?
How may I get the maximum current capacity for a particullar size Alluminum or Copper cable if there is compulsion to use?
pls tell us AC plant are how do work and parts name with picture
given data are load current & power factor cable core size? plz any one update the calculation formula
