Answer Posted / jisaan

cogging is a magnetic locking when rotor teeth moves with stator teeth causing noise in the motor.

Crawling is causedby the 7th harmonics affecting the speed due to interference.

how does a shunt reactor maintains the bus voltage???

1581

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WHat is the requirement of installing FAST ACTING EARTH SWITCH in GIS and how is that integrated with protection system. How and when does it operate?

1486

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what is the diff. between x'mer , isolation x'mer & ultra-isolation x'mer ?????????????

1708

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how to calculate short circuit current for the busbar

949

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How line capacitance & line inductance varies with increase in height tower.

1863

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difine electrical ballast in HPSVL

1559

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75 kw motor take 45 amp in no load delta in star 10 amp but in load it will take 160 amp but IR velue of winding above 500 at 1kw ph to earth and ph to ph. what problem it should be?

3270

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How to arrange a hous hold earthing system to keep minimum earth resistance( below 7ohms).

1488

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Both generator parallel condition shared load equally but one genrator taking ampere more than the other what are all the causes to make like this

1241

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Is any AC drive(VFD) had a feature of DC injection braking? if available please mention the detail. i.e drive can supply braking torque when the motor in idle state.

1684

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how to calculate the step resistance for slipring induction motor,how you deside the no of step for that?

1653

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please send me previous year questions of jspl through which i could prepare myself for the test.

1371

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Merits & Demarits of Oil circuit & Air circuit breakers ?

1607

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how to determine the cable size...pls explain me with the formula taking particular load....does the factors like impedance & short circuit rating influence the cable size, if so how....

1581

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In ups static switch if i gives the supply at output end it will open the circuit in stactic switch or not if it will open then how it operates.

1849

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