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Gibbons jargon buster #11: What is a megger?

Here’s another of our blogs explaining confusing terms and phrases from our industry. Today we ask what is a megger, and where does the name come from?

Megger is short for megohmmeter, which is a device for testing the insulation properties of electric wiring and winding. The device is so-called because a megohm is a unit of resistance equal to one million ohms.

In the case of an electric motor, a megger passes a high voltage at low current through the motor’s windings and measures the resistance of the various insulation systems. A megger is a handheld device and the test has been a popular choice for many years because it is non-destructive.

For information on any aspect of electric motor purchase, repair, maintenance or testing, give us a call on 01621 868138 or email info@gibbonsgroup.co.uk and we’ll be happy to help.

Electric Motors

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