Plus, failure to check your motor’s insulation could result in dangerous conditions when you apply voltage, or your motor could burn out entirely. If you like saving money and preventing down time, then this one is for you! With a preventative maintenance plan, you can schedule reconditioning or repairs before complete service failure. The actual values might vary depending on the temperature or humidity, so make sure you’re keeping good records. By the way, good insulation has a high resistance, whereas poor insulation has a relatively low resistance. Typically, the resistance drop is gradual though, which is where electrical testing comes in!Ĭhecking your motor’s insulation periodically is key. And once that starts, there’s no turning back. Over time, these rascals cause tiny holes and cracks, allowing moisture or foreign particles to leak into the surface of the insulation – giving way to a low resistance path for leakage current. However, despite major manufacturing improvements to motors over the years, insulation is still susceptible to classic wear and tear, as well as other villains like mechanical damage, vibration, excessive heat or cold, dirt, oil, corrosive vapors, moisture from processes, or just natural humidity, which can cause insulation failure. If you’re working with brand-new, shiny motors in your plant, then your electrical insulation should be in tip top shape. Why should you be running insulation resistance tests on your motor? Why would you need to Megger a motor? Or better yet… To each their own, right? Plus, this is a blog, not a lecture hall. Plus, we’re flattered that you’re throwing around our name so much, so we can’t complain.īut what you’re really asking is – how can you run an insulation resistance test on a motor? And that is a question we can definitely help you with, regardless of whether you say Megger, megging, or meg a motor. Megger is a registered trademark, not a verb, but we get it – old habits die hard. Well, if we’re nit-picking, technically speaking, you can’t ‘Megger’ a motor.
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