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  • 17th August 2016

Predictive Maintenance monitors the health of valuable assets in Industry, allowing for serious, and potentially expensive, problems to be identified quickly, and swift corrective action to be taken.

There are many condition-based monitoring techniques: Vibration Analysis can be used to monitor bearing health, and Thermography can highlight problems before they escalate out of control. One under-used technique is Electrical Testing of motors. There are two main approaches:

Static Testing is carried out on the motor while it is disconnected, and identifies problems such as loose connections, moisture, contamination and weakening insulation.

Dynamic Testing involves measuring the voltage and current of a motor’s three phases while it is operating under normal conditions. The results are used to calculate a host of information relating to the motor, and can identify both electrical and mechanical issues.

If Static Testing is similar to an annual health check, Dynamic Testing is the equivalent of monitoring an athlete during a race – giving the chance for both instant feedback and long-term advice.

Dynamic motor testing includes Vibration Analysis, and Voltage or Current Spectrum Analysis. Both are powerful tools, and are unobtrusive, requiring little if any down time. They can be used to identify a range of electrical and mechanical problems in rotating equipment. Vibration Analysis looks at the kinetic energy given off by defective components, and Voltage or Current Spectrum Analysis looks for the effect defective components have on the supply voltage. Both types of analysis can be carried out when the machine is still running, and are usually performed at set regular frequencies, as part of a Predictive Maintenance Programme. In modern Industry, Predictive Maintenance is now considered vital for maintaining efficiency.

For more information on Static Testing, Dynamic Testing, or Predictive Maintenance Programmes, contact Ray McHugh at GES Mallusk, on: 02890 835567, or email info@ges-group.com.