During he starting up of the motor, the upstream's MCCB (350A) always trips due to the UVT relay activated. Can Star-delta starter use for a 20kW Motor (For a powder mixer machine) cause voltage-dip in the supply line voltage? If so, what are the recommended solution to eliminate/reduce the transient voltage dip in the line voltage?

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What happen if 200KVAR capacitor continuesly connected to load and all the plant machinaries are not in working?

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why fuse is not applicable for nutral and what will happen when it applied.

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Why there are semi conductor layers on conductor and XLPE insulation of HT cables

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What is advantages of ungrounded neutral?

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what is the difference between transformer and amplifier ??

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why in a swquence network representation, the negetive sequence generated voltage is taken as zero?

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What is the usega of brking resistor? and how it will useful to Drive...?

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what is mean by derating factor?

4 Answers   Essar,

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Pure inductive ckt takes power from AC when 1. Applied voltage and Current increases 2. applied voltage and current decreses 3. voltage decreases and current decreases please justify

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if step down transformer step down the voltage,will current will also be proportional step up. If yes then how transformer handle such a large current?

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Can i get some examples of mechanical devices?

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