The MOTOR GENIE® measures impedance (Z), phase angle (Ⲫ), current/frequency response (I/F), and insulation-to-ground resistance (500V or 1000V and measure to 500 megohm).
Although the MOTOR GENIE® testing range is dependent upon the motor, it has successfully tested AC motors of hundreds of horsepower in size.
There are four basic types of winding faults.
- Between turns in a coil
- Between coils in a phase
- Between coils in different phases
- Between a coil or phase and ground
Only about 5% of electrical faults begin as a fault to ground. The other three fault types may or may not propagate into a ground fault as the failure becomes advanced. The short term result of these faults is reduced efficiency and higher operating costs.
- Higher operating temperatures
- Possible nuisance tripping
- Reduced motor life
As faults advance, power and torque may decrease. However, the longer-term result is always motor failure.
Megohm insulation testing will only detect faults to ground. The majority of faults will go undetected using this method alone.
Surge testing requires the application of high voltages and currents, which can be destructive and actually generate faults. This aspect combined with the size of surge testing equipment makes it inappropriate for troubleshooting and predictive maintenance testing.
In addition, resistance and inductance-only (RLC) test methods don’t provide enough information for reliable fault detection and troubleshooting.
The ALL-TEST PRO® MOTOR GENIE® is your best, most economical choice for fault detection and troubleshooting.