What is the effect on 3phase induction motor if current setting knob of DOL kept at minimum current?

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what is the std. earthing resistance for 440V system or m/c, 33000/440 Volt substation? What is the std.?

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in battery charging room we find two fuses (one in positive other in negative cables ).why it is so?one fuse is ore than sufficient?

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Can a dc motor works as a dc generator. If yes , then how?

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What are different types of control systems?

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Wat is power factor exact meaning in terms of technical terms plz explain ?

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what is the meaning and difference between ELECTRICAL DRAWOUT and MANUAL DRAWOUT?

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what is the harmonics? which harmonics(fundamental and reference) is suitable for calculating capacitor bank and Active filter and passive filter? what is the 1st 2nd 3rd 4th 5th harmonics and effects?

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what are the particle used along with silica gel in transformer breether,explain their functions.

4 Answers   ME, Oil India,

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what are the specifications we must look at to select a relay for any capacity motor?

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Kindly give the brief explanations for checking 12.5 kvar 440V, 25 KVAR 440V, 12.5KVAR 690V, 25 KVAR 690V capacitors microfarad values. what is the microfarad values for the above four type of capacitors, and give the formula explanations briefly. I know F-50HZ, voltage, and capacitor.

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Pls say , how we calculate lux / sq.ft, which formula used for calculation

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