22-12-2012, 03:23 PM
LOAD TEST ON D.C. COMPOUND MOTOR
LOAD TEST ON D.C. COMPOUND MOTOR.docx (Size: 13.83 KB / Downloads: 24)
PROCEDURE
The connections are given as per the circuit diagram.
The DPST switch is closed.
The motor is started using the four point starter.
The speed of the motor is adjusted to the rated value by varying the field rheostat.
The no load readings are noted.
The load on the brake drum increased in steps.
At each step of loading the meter readings are noted.
The procedure is repeated till the ammeter reads the rated current.
PRECUATION
All the switches are kept open initially.
The field rheostat should be kept a minimum resistance position.
There should not be any load when start and stop the motor.