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Some Tips For Preventing Motor Failure

Some Tips For Preventing Motor Failure

Industrial motors are built to withstand industrial conditions. Failures should be few and far between. Quite often, one small change is all that’s needed at a given facility to slash the failure rate. Sometimes, many changes are needed. What does your facility need? Compare these tips to your current practices: Select the correct motor for […]

Saving Energy without a Motor Upgrade

Saving Energy without a Motor Upgrade

When replacing a motor, upgrading to an energy-efficient version is a no-brainer. One reason is when you chart the cash flows you may see the equivalent of several free motors over the life of the motor based on the energy-savings alone. Another reason is the “energy efficient” part comes from making a better, more precisely-built, […]

Making Motor Maintenance and Replacement Easier

Making Motor Maintenance and Replacement Easier

Sometimes, it’s hard to see around a given motor. One solution is to use portable lights or just a flashlight. A better solution is to install fixed lighting, if practical for that location. Make sure you light up the motor nameplate, the weatherhead, the motor mounting area (to make it easier to read a torque […]

Circuit Overload Protection for Hermetic Motors, Part 2

Circuit Overload Protection for Hermetic Motors, Part 2

You must use one of four methods to protect the motor-compressor control apparatus, disconnecting means, and branch-circuit conductors against overload and failure to start [440.52(B)]. These are: An overload relay selected per 440.52(A)(1); that is, it must be responsive to motor current. It must trip at not more than 140% of the motor-compressor rated-load current. […]

Circuit Overload Protection for Hermetic Motors, Part 1

Circuit Overload Protection for Hermetic Motors, Part 1

Part VI of Article 440 provides the requirements for protecting the branch circuits of hermetic motors from overload. It specifies devices you can use for this purpose, and how to use them. First, you need to understand what Article 440 means by “overload.” This is different from short-circuit and fault protection. Overload is a condition […]