JCI provides on-site testing and preventative maintenance programs like Motor Management Program (MMP). This program consists of safe storage for critical spares, monthly rotation of each shaft, megger test of each motor, and documentation of findings. Reporting on all motors in MMP is available upon request.
JCI’s in-house testing with the Phenix Technologies high power motor test equipment that perform testing of all types of motors up to 10,000 HP motors:
JCI continually invests in new technologies, such as PdMA®, to benefit our customers. PdMA technology enables more proactive preventive maintenance during scheduled downtimes for our customers, who then avoid higher rush and emergency repair cost due to motor failure in the future.
Schedule JCI’s portable, PDMA MCE —offline tester to your location to monitor and trend the condition of AC induction, synchronous, wound rotor, and DC motors and their circuits and evaluate the following:
JCI performed PdMA motor circuit test on a 75 HP PD Blower Package motor that was tripping out at the Fishing River Wastewater Treatment Plant in Kansas City, Missouri.
Misdiagnosis caught with PdMA testing.
Unnecessary motor replacement avoided.
The 75 HP motor had continued trips of the circuit breaker. Repeated operation resulted in breaker trips. The blower system was within the contractors warranty and resolution of the motors tripping was required.
Looking for the Root Cause
Initial efforts concluded that the fault was in the motor. Once notified of the situation, JCI meggered the motor and performed other tests to test the condition of the motor. JCI used a PdMA tester to verify the condition of the motor. The test indicated that both the motor and power circuit were in good condition with no apparent faults. The PdMA report determined the motor’s insulation system, power circuit and stator winding to be in good health. However, the Power Circuit Check revealed inferior wiring motor connection inside the motor junction box. JCI repaired the motor connection and the motor has not tripped since this was corrected.
JCI used off-line testing to verify the sound condition of the motor and power circuit. The savings from this action were substantial considering removal, installation and motor replacement expenses were prevented. Additionally, costly down time resulting from a misdiagnosis was avoided with the availability of the blower for the aeration of sludge for land application.