Induction Motor Testing - IEEE Std 112
All induction motors are tested before shipment from the factory. IEEE Std 112-1996 applies to induction motor testing. This testing can be subdivided in two groups:
1.) Routine tests
2.) Complete or prototype tests
Routine tests
Depending on the size of the motor, some or all of the following tests could constitute routine tests:
-Winding resistance measurement
-No-load running current and power
-High-potential test
-Locked-rotor test
-Air-gap measurement
-Direction of rotation and phase sequence
-Current balance
-Insulation resistance measurement
-Bearing temperature rise
-Magnetic center at no-load
-Shaft voltages
-Noise
-Vibration
NEMA MG1 includes the first three tests for all motors, and the fourth test for medium motors only.
Prototype tests
This test consists of the following tests in addition to the routine tests:
-No-load saturation characteristic
-Locked rotor saturation characteristic
-Locked rotor torque and current
-Loss measurement including stray load loss
-Determination or measurement of efficiency
-Temperature rise determination
-Surge withstand test