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Q5 A 3-phase, 60 Hz, 500 V, delta connected motor develops mechanical output of 250 H.P., the...

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Electrical Engineering

Q5

A 3-phase, 60 Hz, 500 V, delta connected motor developsmechanical output of 250 H.P., the power factor being 0·7 lagging(without capacitors) and motor efficiency 88%. A bank of seriescapacitors is connected in delta across the supply terminals. Twosimilar capacitors connected in series exist in each phase. Each ofthese capacitors is rated at 250 V, 800 µF. What is the new powerfactor of the motor after connecting the capacitor bank, also findout saving in the KVAR absorbed from power supply after improvingpower factor?

Figure1(Feeder comes from this side)

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