Electric Motor Testing

Ac and dc brush type motors such as those used in vacuum cleaners and power tools produce high power.

Electric motor testing.

Motors without brushes and commutators such as ac alternating current induction motors last the longest because of few moving parts. Minimum test value for a good electric motor is at least 1mω running amps test with the motor running check the full load amps fla with a suitable meter or preferably a clamp on meter and compare with the motor name plate fla. Most electric motors whether ac or dc fail after time for reasons that may not be electrical in nature. Electrical motor is the common used in industry all over the world it very important device to made production smoothly to ensure the electrical motor condition is good or not we must know how to testing it.

Electric motor testing is usuallly the first thing to be sacrificed when cutting back on operational expenses. Static electric motor testing looks at the motor s insulation system while online or dynamic electric motor monitoring can identify issues regarding power quality and. The power quality supplying the motor the motor itself and the driven load. So when a motor fails to operate it may not be obvious what the problem is.

Check c to e s to e r to e. Testing electric motors doesn t have to be a mystery. Ideally the meter should barely move off the highest resistance indication. Many electric motor failures are caused by bearing failures.

When a motor isn t working right or fails you can use testing to track down the most probable cause of the problem. When an electric motor fails to start runs intermittently runs hot or continually trips its overcurrent device there my be a variety of causes. And press a test probe to this spot and the other test probe to each of the motor leads one at a time. July 1 2015 by david herres 14 comments.

And electrical failures require your maintenance group to go about testing the motors in your care. After bearing failure electrical faults are the most common mode of motor failure so in addition a properly planned electrical testing scheme is important for making sure of the plant reliability. Deviations from rated fla could signify problems with the motor under test. Knowledge of the basics together with powerful new test equipment vastly simplifies the job.

Electric motors have had a reputation for being a mix of science and magic. The electrician or maintenance person must have this skill to determine the electrical motor condition defected or cannot use anymore it can save. Basic motor testing with multimeters and ammeters. The most obvious benefit of testing is troubleshooting.

The electric power research institute epri conducted a survey which brought into the light that 48 of motor failures are because of electrical. The bearings allow the shaft or rotor assembly to turn freely and smoothly in the frame. Sometimes the trouble lies within the power supply.