Electric Motor Circuit Analysis
ALL-TEST Pro gives you an inside look at rotors, coils, phases, grounds and resistances to fix issues before they have a chance to occur. Even brand new machines that have just been installed can fail prior to a first-time startup, so an off-line analysis is effective for systems that have stopped working, have parts coming back from repairs or experience frequent use.
Not all motor circuit errors are simple to spot with the human eye.
ALL-TEST PRO 7™ and ALL-TEST PRO 34™ detect faults as well as the condition of functioning parts for future reference. Gradual wear and tear occurs through factors including heat, vibration and overpowering an electric motor circuit, but our solutions are a leading source for accurate diagnostics and reports.
How Does it Work?
The electrical portion of the three phase motor system is made up of the basic motor circuit, which is nothing more than three simple RCL circuits (resistive, capacitive, inductive). Each basic circuit represents one phase of the three-phase motor system. Since each phase of the motor system is identical, each basic circuit should respond the same way to an applied signal. This is also true for single-phase and DC motors.
ALL-TEST Pro instruments apply a series of low voltage, non-destructive sinusoidal AC signals through the motor windings and measure the response to these signals. Winding faults are indicated by variances in the response to the applied signal through the windings. This deenergized test takes only a few minutes and can even be performed by an entry-level technician.
Why Traditional Megohmmeter Testing Isn’t Enough?
Avoid unplanned downtime by proactively and thoroughly testing your motor for faults. This means going beyond the capabilities of a traditional Megohmmeter. Megohmmeter insulation testing will only detect 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 offers 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.