Interview Question On Relay
1. State the characteristic features of synchronous motor. Ans: a. the motor is not inherently self starting b. The speed of operation…
Expression For Back E.M.F Or Induced E.M.F. Per Phase In S.M.
Case i) Under excitation, Ebph < Vph . Zs = Ra + j Xs = | Zs | ?? ? ? = tan-1(Xs/Ra) ERph ^ Iaph = ?, Ia lags always by angle…
Blondel Diagram ( Constant Power Circle) In Synchronous Motor
The Blondel diagram of a synchronous motor is an extension of a simple phasor diagram of a synchronous motor. For a synchronous…
Efficiency Of A Transformer
Due to the losses in a transformer, its output power is less than the input power. ∴ Power output = Power input…
Synchronous Condensers
When synchronous motor is over excited it takes leading p.f. current. If synchronous motor is on no load, where load angle ? is very…