Answer Posted / rajkumar

Power factor is an angle between the waveform of voltage
and current P.F=cos*
P.F=KW/KVA

i have some screw comprressor with 630kw power,i have established them with simple star to delta circuit,by the way there is so much inertia when the screw comprressors start, can you offer me contactors power with 400vac or any cataluge to choose the contactors

1906

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IF TVM OF TRANSFORMER SHOWS POWER FACTOR ON 33 KV SIDE AS 0.97 LAGGING AND ON 132 KV SIDE IS 0.75 LEADING.IS THIS CORRECT.WHERE IS PROBLEM.

2420

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I want to know the 'Test voltage' for Tandelta testing of 3.3 / 6.6 / 11 KV Motors. Please explain

2306

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what is active power & reactive power?

2275

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Q.1:What protection will be used on HT and LT side of 33/0.4 KV, MVA transformer. Indicate capacities of protective device to be used. Q.2:Which types of back-up protections are used in the power transformers? What do you understand by the term over travel in the relay? Q.3:How star and delta connected winding transformer are provided from earth fault

2180

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how to select electronic timer(Star-Delta) setting for diff. rating motors

2002

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physical identification of HT & LT panel

1727

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exolain the star delta connection

2724

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What are approaches to tackle sedimentation problem of reservoir?

1077

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wht is embedded systems? what is new inthis field?

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How generator NPS(NEGATIVE PHASE SEQUENCE TEST)TEST WAS DONE? PROCEDURE WITH DETAILS?

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Why does curving the pole faces in a dc machine contributes to a smoother dc output voltage from it?

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Difference of induction motor & servo motor ??

1868

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Is it true online ups having bypass mode if it is true then why we called ups because it is interrupting power when goes in bypass mode

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I need HT sphere gap calibration table. Can any body help me.

1995

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