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Electrical Insulation is subject to many effects which can cause it to fail — mechanical damage, vibration, excessive heat or cold, dirt, oil, corrosive vapors, and moisture in the air. In varying degrees, these enemies of insulation are at work, and through the passage of time and with electrical stresses, pinholes or cracks can develop allowing moisture and foreign matter to penetrate the surfaces of the insulation.

Having moisture and foreign matter enters into insulation can lead to a low-resistance path for leakage current. A drop in insulation resistance can be sudden, such as when equipment is flooded, but most times the drop is gradual, giving plenty of warning if checked periodically.

Reduce the risk of failure, unexpected downtime, and expensive emergency repair costs by testing your generator for insulation problems with a Megohmmeter test. Using a portable handheld tool, Holt of California's trained technicians can perform the Time-Resistance Method test on your generator insulation to determine its condition.

Megohmmeter testing can be applied to most simple circuit electrical equipment and devices, including:

  • Wiring
  • Motors
  • Switches
  • Generator Windings
  • Transformers

What Does a Generator Megohmmeter Test Involve?

Our generator megohmmeter testing process entails a comprehensive inspection of the insulation and windings to check for signs of wear and debris. We'll also verify the insulation's integrity and consistency and assess the generator's overall efficiency. 

The benefits of our megohmmeter testing process include:

  • Proactive analysis: You'll gain valuable insight into the condition of your equipment, enabling you to correct minor issues before they become significant problems. 
  • Lower failure risk: Regular testing can reduce the likelihood that your generator and power system will not perform during an emergency.
  • Maximize equipment life expectancy: By keeping your megohmmeters in peak operating condition, regular testing can prolong your power equipment's life span, lengthening the time between costly replacements.
  • Predictive repairs: Regular testing can help you anticipate when a mechanical failure might occur, allowing you to create a comprehensive repair schedule.
  • Accurate results: The accuracy of a megohmmeter test is extremely high, enabling you to make informed equipment management decisions.

How Often Should Megohmmeter Testing Occur?

Holt of California recommends testing your megohmmeters once every five years. We can conduct the process more frequently for high-demand or heavy-use applications. We'll work with you to set up a schedule that makes sense for your business.

Contact Us About Our Megohmmeter Testing Service

Do you have questions about the megohmmeter testing process or need to schedule this service for your business? Call Holt of California Power Systems at 800-452-5888 or contact us online for additional information.