Synchronous Motors In order to to reverse the direction of a synchronous motor, _______ Reduce dc field excitation to zero Interchange any two stator lines None of the listed here Change supply frequency Reduce dc field excitation to zero Interchange any two stator lines None of the listed here Change supply frequency ANSWER DOWNLOAD EXAMIANS APP
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 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 lagging power factor with over-excitation leading power factor with over-excitation leading power factor with under-excitation ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor can be started by Provinding damper winding All of the listed here Dc compound motor Pony motor Provinding damper winding All of the listed here Dc compound motor Pony motor ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In a 3-phase synchronous motor, the negative phase sequence exists when the motor is under-loaded None of these over-loaded supplied with unbalanced voltage under-loaded None of these over-loaded supplied with unbalanced voltage ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor runs at speed ranging from ______ 150 to 1800 rpm 3600 to 6000 rpm 1800 to 3600 rpm None of the listed here 150 to 1800 rpm 3600 to 6000 rpm 1800 to 3600 rpm None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The percentage slip in case of a synchronous motor is 0.01 1 zero 0.005 0.01 1 zero 0.005 ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS