Electric Motor Visual Inspection Checklist

Commercial and industrial inspections checklist 7 1.

Electric motor visual inspection checklist.

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. 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. Generally a good place to start would be the supply intake. If the electric motor operates in a rugged environment you will see signs of corrosion and dirt buildup on individual components.

The trend of the readings will indicate the condition of the motor and offer a guide to its reliability. One of the most common causes of electric motor failures is bearing failure. Temperature of the motor above ambient. Many sections are mainly applicable to the lv mv induction motor equipment and many others are applicable to either synchronous or dc motors.

This will give a reasonable indication of the age type and size of the installation. The checklist should also cover inspection of bearings. Regularly scheduled infrared inspections of electric motors identify motors which are starting to overheat. A quick visual inspection can reveal some important details about the electric motor.

Perform annual insulation resistance ir and other appropriate tests. Important motors should also receive a thorough visual inspection as well as voltage and current checks. Service equipment feeders and panelboards checklist 6 28. Inadequate air flow or poor ventilation.

Check and torque test bolted electrical connections as necessary to specified levels. All values should be recorded and compared each year. Final visual inspection to insure all clear after work completed. Visual inspection for signs of overheating or deterioration.

Some sections may explain explicitly between the three configurations but have different requirements for each. 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. 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.

Mobile manufactured home site inspections chapter 7. To inspect electric motors for possible overheating see checklist in table below and possible remedies. With electric power checklist 6 26. Outdoors checklist 6 27.