La station d’épuration PdM fait gagner du temps et de l’argent à l’installation

A technician at the wastewater treatment plant issued a work order requesting electrical assistance due to a malfunctioning floating agitator. The circuit breaker had tripped, and the agitator is a critical component of the treatment process. Upon investigation, two tradespeople found that two wire nuts/splices in the terminator box had burned out. Using standard industry testing practices, the motor was determined to have a winding defect. Preparations were discussed to engage contractors to remove the platform, dismantle the unit, and repair the assembly if necessary.

 

Condition as found:

– Tripping of a circuit breaker that does not reset.

– Burnt/open terminations and winding defects.

– The standard procedure is to replace the faulty equipment.

The technician independently requested that the AT5™ be used before such a costly repair began. Preliminary tests revealed a decrease in the insulation properties of the wiring between the MCC and the motor. A test performed on the motor itself yielded a favorable result. This indicates that the motor is not faulty and can remain in service.

Results of current tests

– MCA™ De-excitation Test.

– An additional development flaw has been identified.

– Although affected by the storm, the engine receives a passing report

The termination repairs were completed, and the motor was tested for operation and returned to service. The motor cooling fan shroud was found to be completely filled with debris, which contributed to high temperatures and termination failure. It was cleaned, which significantly reduced motor temperatures. For reference, the last repair (bearings/turbines) for this type of asset cost $6,266, and the last motor rewind cost $8,600. Furthermore, no replacement parts are available in their stores.