What is tan delta point of transformer?

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power transmission pole used one support , that only for support or earthing

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why AC signals are represented by sinusoidal waveform?WHY other waveforms not used for representation

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Explain RYB?

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if i have one capacitor=80 micro farad which correct the unity power factor,but i want to make capacitor bank who correct the power factor.so,how to split this capacitance value?

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in the case of 6.6kv motor starter combination contain fuses on it VCB. but in 11KV motor starter combination Fuses are not using in it's VCB why?

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what are the protecyion of transformer & generators

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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

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Batteries. What is the difference between Lead and Nickel batteries ?

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The neutral&earth voltage is 0v.But we were connected the lighting load at the time ballast was failed.why?

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How Can I calculate for the photometrics requirements for a street lighting? Data given are: 45 units of 6 meter light pole with 150 watts metal halide lamp, 220 volts and installed in a promenade area.

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from 33kv to 440v 2mva transformer how much full load current will be at ht side and lt side and which range of ctpt will be used?

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