The currents in the coils connected to a brush are either all towards the brush (positive brush) or all directed away from the brush (negative brush). Therefore, current in a coil will reverse as the coil passes a brush. The reversal of current in a coil as the coil passes the brush axis is called commutation.
A power plant operator is a person who operates a power plant. He has got to be good at the technical skills of using the power plant and must be equally talented in distributing the work to the other workers who are working with the power plant.
Whenever an engine is at or below idle with the fuel control switch in RUN. FCOM 1 70.20.8
ACSR means Aluminium conductor steel reinforced, this conductor is used in transmission & distribution.
It is a procedure that is used for the protection of the workers and the equipments during the maintenance or repair of the power plant.
Compensation windings are used to neutralize the cross magnetizing effect of armature reaction.
A two phase motor is a motor with the the starting winding and the running winding have a phase split. e.g;ac servo motor.where the auxiliary winding and the control winding have a phase split of 90 degree.
Dual ignitors are always used for in flight starts. FCOM 1 70.20.8
It is used with generators for charging a number of capacitor in parallel and discharging them in series.It is used when voltage required for testing is higher than the available.
Gate signal is to be applied to the thyristor to trigger the thyristor ON in safe mode. When the thyristor starts conducting the forward current above the minimum value, called Latching current, the gate signal which is applied to trigger the device in no longer require to keep the scr in ON position.