Rotor resistance starter is used to obtain= A increased starting torque B decrease starting current C decrease starting loss D increase efficiency

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What will be the average KVA rating of Auto Transformer for 75kw 415V , 3phase induction motor

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cost of operation of which plant is least?

6 Answers  

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Why does the rotor rotate?

0 Answers   Elin, OPTCL,

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What is the value of nuetral current in star connected load when DC is supplied to it???

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how many units will 100 kvar capacitor consume for one day?

2 Answers   Philips,

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what time should we set to come on star contacter in stardelta starter?and for what reason we hav to set such time delay range?

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what is high - pot test. what's its use?????

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What OPGW is better than Microwave or PLCC???

0 Answers   Four Seasons,

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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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in the directional overcurrent and earthfault protection,normally we are setting the angle 45 deg lead for phase fault overcurrent and -45 deg lead for earthfault fro forward direction.but both the fault are operating on the same angle region only.why?how the relay will response?

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What is a differential amplifier? Also, explain cmrr.

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