The handheld MOTOR GENIE® is an excellent troubleshooting tool that tests low voltage AC induction motors, finds winding faults such as turn-to-turn, coil-to-coil, and grounded windings.
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.
Winding defects can occur due to insulation age, contamination, power surges, thermal overload, damaged wire/materials, vibration and other causes. They begin as energy crossing an insulation fault (such as moisture or contamination), which isolates at least one turn. This generates additional stress and heat across the defect, which progresses until an arc is drawn and the winding fails.
There are four basic types of winding faults.
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.
Symptoms include:
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.
TRITAN ENGINEERING SDN. BHD.
No. 28, Jalan Permas 9/13,
Bandar Baru Permas Jaya,
81750 Masai, Johor, Malaysia
Tel: +607-388 2010
Fax: +607-388 4316
Email: koh1@tritan.com.my
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