Now that’s a pair of balls!

Ok, maybe not a typical opening to a website post but it’s a good one. Here’s an example of something that any user of electric motors doesn’t want to see at all on their motor’s bearings. The ‘old favourite’, signs of circulating shaft current damage. The typical example that we’ve probably all seen in photos is the fluting or washboard …

Why multimeters shouldn’t be used to test large electric motors

Why in-field testing an electric motor with a multimeter might not be such a good idea. We had a call-out to a customer over the bank holiday weekend where they were having trouble with an inverter tripping each time it tried to drive a motor. The information we had from the site engineers was that the motor tested ok and …