Deenergized Testing & Motor Circuit Analysis (MCA)™
Motor Circuit Analysis (MCA™), also referred to as motor circuit evaluation (MCE), is a deenergized test method to assess the health of a motor. Initiated from the Motor Control Center (MCC) or directly at the motor itself, this process evaluates the entire electrical portion of the motor system, including the connections and cables between the test point and motor.
Why Traditional Megohmmeter Testing Isn’t Enough
Megohmmeter insulation testing only detects faults to ground. Since only a portion of motor electrical winding failures begin as ground faults, they will go undetected using this method alone. Moreover, surge testing requires the application of high voltages. This can be destructive when testing a motor, making it an unsuitable method for troubleshooting and true predictive maintenance testing.
ALL-TEST Pro devices offer more complete motor testing than any other options on the market. Our instruments go above and beyond normal testing equipment for accurate, safe, and fast motor testing. Motor testing using an MCA™ tool is very easy to implement, and the test takes less than three minutes. Save money and time by proactively detecting developing faults before they cause irreversible motor failures.
Issue | Meg-ohm Meter | Multi-Meter | ALL-TEST PRO 7 |
Ground Faults |
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Internal Winding Faults |
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Open Connection |
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Rotor Faults |
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Contamination |
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How Does it Work?
The electrical portion of the three phase motor system is made up resistive, capacitive and inductive circuits. When applied low-voltage, healthy circuits should respond in a specific way.
ALL-TEST Pro instruments apply a series of low voltage, non-destructive, sinusoidal AC signals through the motor to measure the response of these signals. This deenergized test takes only a few minutes and can even be performed by an entry-level technician.
Deenergized Testing Applications
Too often, equipment operators won’t seek help until a motor starts to make a grinding noise. Now, you can file maintenance requests proactively when necessary using ALL-TEST Pro products.
Our deenergized testing devices are ideal in the following areas:
- AC/DC Motors
- AC/DC Traction Motors
- Generators/Alternators
- Machine Tool Motors
- Servo Motors
- Control Transformers
- Transmission & Distribution Transformers (Virtually Any Size)
- For Commissioning Testing
- For Troubleshooting
- For Reliability Testing
The ALL-TEST Pro Promise
ALL-TEST Pro is committed to ensuring the reliability of your businesses’ motors to maximize optimal productivity of maintenance teams everywhere. Our equipment is used in commercial, government and military institutions worldwide. Applications include AC/DC electric motors, transmission, distribution transformers, machine tool motors, servo motors, AC/DC traction motors and more.