Rectifier Type Instruments
Rectifier type instruments are used for measurement of ac. voltages and currents by employing a rectifier element which converts a.c. to a unidirectional d.c. and then using a meter responsive to d.c. to indicate the value of rectified a.c.
The indicating instrument is PM MC instrument which uses a d ’Arsonval movement.
This method is very attractive since PM MC instruments have a higher sensitivity than the electrodynamometer or the moving iron instruments. The arrangement which employs a full wave.
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