EMP Engineering Services motor test and evaluation covers motors of all types and sizes. By understanding the condition of motors and ensuring that they are operating in the most economically efficient mode possible our clients realize significant gains to their bottom line.
Key Benefits of Motor Testing
Cost reduction through the early detection of problems such as weak insulation and open connections.
Improved efficiency through diagnosis of adverse factors affecting the dollar cost of operation.
Reduced downtime through increased equipment reliability and availability.
EMP Motor Testing Capabilities
EMP Engineering Services offers test and evaluation services using equipment and practices that blend the cutting edge of technology with time-tested practices used by OEMs and major motor users.
Periodic Motor Testing with MCE
Routine MCE (Motor Circuit Evaluator) testing tracks electrical parameters such as insulation resistance (megger), capacitance-to-ground, circuit inductance and circuit resistance in a standard test. The insulation resistance and circuit resistance are also temperature corrected to allow trending and comparisons to IEEE recommended criteria.
In addition to the standard test, the MCE can also be used to measure Polarization Profiles (PP) and Rotor Influence Coefficients (RIC) for detailed analysis if problems are noted or if the customer requests such testing.
An insulation system polarizes if potential is left on it for an extended period. This polarization results in increasing resistance to ground. IEEE says that the 10 minute insulation resistance should be at least twice that of the 1 minute value. The ratio of these two readings is called the Polarization Index, or PI and has been a standard in evaluating insulation health and effectiveness for years.
As anybody who has ever watched an analog Megger meter for 10 minutes knows, the needle will occasionally drop on some some insulation systems, even though the overall trend is increasing. This is due to partial discharging. Partial discharge occurs when the potential at some point in the insulation exceeds the breakdown voltage at that point and some of the potential is discharged. The mechanism is usually micro-sparking and although it is very small, repetition of this destructive phenomenon will cause serious degradation over time. The Polarization Index is a graphical representation of this test.
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