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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,
2464What is meant by load angle of an alternator? Upon what factors does the load angle depend?
VECL,
2964How 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 3649How much ph is maintained of water electrolyte which is used in LRS for 1200 kw slipring induction motor ?
1723Post New Electrical Engineering Questions
What is lc oscillator?
How many VSC based HVDC are there in India and the world
How to determine the breaking capacity such as break down current and break down voltage for VCB and CT's.
Hello sir i m student of gtu .what is idp.
what happen if the load connected to the induction motor is taken away? the same question for synchoronous generator in synch i think that the the exitation voltage will appear on the terminal only if so plz answer me
Is a contactor (or master relay) required between incoming lines and a VFD? The question goes to safety. If a contactor were used before the VFD and an e-stop engaged then the motor will coast to a stop (i.e. VFD loses power) instead of stopping much faster if the VFD braking fucntion were used. It would make more sense to keep power on the VFD.
State Maximum Power Transfer theorem.
Why do not we prefer non conventional sources of energy to conventional sources?
In hydel power plants, L.A's, S.C's are placed inside the control panel boards. what is the purpose? [already the total body was earthed to ground.]
is it necessary to earth the rmu before cutting off the transformer winding?if yes why?
How I calculate the ELCB for circuit breakers?
What is CCT (Correlated Color Temperature) ?
how to select proper cable for ct wiring so that drop within the limit.
What will happen if the voltage in my house drops from 220V to any lower voltage?
why swityard is necessrry requirement in any bis power distributin systems?
