Il PdM dell’impianto di trattamento delle acque fa risparmiare tempo e denaro alla struttura

A wastewater treatment plant technician issued a work order requesting electrical service due to a faulty floating agitator. The circuit breaker had tripped, and the agitator is a necessary resource in the treatment process. When two tradesmen investigated, they discovered that two wire nuts/splices in the termination box were burned, and it was determined that the motor had a winding fault using standard field testing practices. Arrangements were made to utilize contractors to remove the platform, disassemble the unit, and repair the unit as needed.

 

Condition as found:

– The circuit breaker tripped and did not reset.

– Burnt/open terminations and winding failures.

– The standard procedure is to replace faulty equipment.

On his own initiative, the craftsman requested the use of the AT5™ before beginning such an expensive repair. 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 favorable results, proving that the motor was not defective and could remain in service.

Current test results

– MCA™ De-energized Test.

-An additional flaw has been identified during development.

– Even though it is hit by a storm, the engine receives a passing report.

Repairs to the terminals were performed, and the motor was tested for operation and put back into service. The motor’s cooling fan cover was found to be completely filled with debris, which contributed to the high temperatures and terminal failure. The result was clean, and the motor temperatures were significantly lower. For reference, the last repair (bearings/impeller) for this type of system cost $6,266, and the last motor rewind cost $8,600. Furthermore, no replacement parts are available in their stores.