Synchronous Motors A synchronous motor connected to infinite bus-bars has at constant full load, 100% excitation and unity power factor. On changing the excitation only, the armature current will have lagging power factor with over-excitation leading power factor with over-excitation leading power factor with under-excitation no change of power factor lagging power factor with over-excitation leading power factor with over-excitation leading power factor with under-excitation no change of power factor ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Dust and dirt accumulation on motor winding will result in Shorting of coils Rise in winding temperature Eddy current flow Increased core losses Shorting of coils Rise in winding temperature Eddy current flow Increased core losses ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor can be started by All of the listed here Provinding damper winding Dc compound motor Pony motor All of the listed here Provinding damper winding Dc compound motor Pony motor ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors An important advantage of a synchronous motor over wound round induction motor is that None of these its speed is independent of supply frequency its speed may be controlled more easily its power factor may be varied at will None of these its speed is independent of supply frequency its speed may be controlled more easily its power factor may be varied at will ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor is a ______ motor. Singly fed Variable speed Variable pf None of the listed here Singly fed Variable speed Variable pf None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The standard full-load power factor ratings for synchronous motors are unity or 0.8 lagging unity or zero unity or 0.8 leading zero or 0.8 leading unity or 0.8 lagging unity or zero unity or 0.8 leading zero or 0.8 leading ANSWER DOWNLOAD EXAMIANS APP
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