Electric Motor Visual Inspection Checklist

One of the most common causes of electric motor failures is bearing failure.

Electric motor visual inspection checklist.

Regularly scheduled infrared inspections of electric motors identify motors which are starting to overheat. Service equipment feeders and panelboards checklist 6 28. Temperature of the motor above ambient. The trend of the readings will indicate the condition of the motor and offer a guide to its reliability.

Check and torque test bolted electrical connections as necessary to specified levels. Some sections may explain explicitly between the three configurations but have different requirements for each. All values should be recorded and compared each year. Many sections are mainly applicable to the lv mv induction motor equipment and many others are applicable to either synchronous or dc motors.

Perform annual insulation resistance ir and other appropriate tests. Outdoors checklist 6 27. Typical bearing problems include insufficient lubrication worn bearings hot motor excessive loading harsh external environments or replacement with the wrong bearing type. Inspection of electric motors regular inspection of electric motors will ensure an excessively hot motor is spotted and cause of overheating eliminated immediately.

This will give a reasonable indication of the age type and size of the installation. A quick visual inspection can reveal some important details about the electric motor. The complete table of inspection and testing activities that shows each activity to be performed in order to make sure that the installed low and medium voltage electric motors are compliant to the project s specifications and requirements the reference to be followed acceptance criteria responsible personnel related checklist from item. The checklist should also cover inspection of bearings.

This checklist incorporates all range of motors equipment. Commercial and industrial inspections checklist 7 1. Take a look at its physical condition and record your observations. If the electric motor operates in a rugged environment you will see signs of corrosion and dirt buildup on individual components.

To inspect electric motors for possible overheating see checklist in table below and possible remedies. Mobile manufactured home site inspections chapter 7. Final visual inspection to insure all clear after work completed. Acb maintenance withdrawable or fixed check contacts arc chutes secondary injection etc.

The first part of a visual inspection is to ensure that the system is safe to test and that you have enough information to be able to carry out the test safely. Most motors are designed to operate in ambient temperatures that do not exceed 40 c generally speaking each 10 c rise above its rated tem perature cuts a motor s life in half. Visual inspection for signs of overheating or deterioration. Important motors should also receive a thorough visual inspection as well as voltage and current checks.