This week’s tip from the PdMA:
Inverting a coil or phase of a stator winding during manufacturing or repair creates a major impact on the operation and reliability of the motor. Depending on the protective devices available to prevent motor failure, the results can range from expensive to catastrophic. Blown fuses, tripped relays, lost production, and shorted stator windings are all examples of what can occur during the start-up of a motor with an inverted phase. Unfortunately, tools like the MCEmax™, which offer a variety of tests for quick identification of an inverted phase are not often available and the troubleshooting becomes lengthy and expensive. Make motor testing part of your asset quality control program, not just part of the troubleshooting and firefighting.
To view a case study on the impact of a phase inversion click here.
To read about it click here.