"We Sweat The Details"
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MOTOR CIRCUIT EVALUATION § The MCE MAX is a lightweight, static and online tester that provides a detailed analysis of motor and circuit condition. This portable unit features diagnostic results that evaluate all five of the motor's fault zones including the power circuit, insulation, stator, rotor and air gap.
Type of Test Performed With The MCE Tester Resistance to Ground (megger) – This test can be an indicator of moisture in the windings. Capacitance to Ground - Capacitance indicates the amount of material build up on the windings. Capacitance levels are influenced by various factors so a diagnosis from a single reading is not feasible. Trend a motor’s readings over time or comparing the readings of similar motors in the same environment provides the most reliable information. Polarization Index - Insulation breakdowns occurring at any time during the test are indicative of short-term current transients possibly due to contamination or moisture. Rotor Influence Check ( RIC ) – Magnetically starting the motor and rotating the rotor through a set of degreed check points. This test indicates possible rotor problems, and can separate electrical problems from the rotor and stator. Resistive Imbalance – Resistive imbalance reflects the condition of the stator windings and power circuit in AC motors. A resistive imbalance can cause a voltage imbalance that produces a rise in motor temperature reducing the potential life of the motor. Inductive Imbalance – An increase in inductive imbalance can indicate leakage in the stator windings or rotor faults in AC motors. A RIC can supplement the standard MCE test results in signaling the presence of rotor defects since a rotor anomaly may not produce a large inductive imbalance on a single test.
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