Further troubleshooting maybe requiredįor three phase motors, the expected voltage for a 230/400V system is 230V phase to neutral and 400V between each of the three phase supply lines. Any value greater 0.5 ohms indicate trouble with the motor.
A good motor should read less than 0.5 ohms. With a multimeter, measure the resistance between motor frame (body) and earth. Examine the name plate thoroughly and compare values of running amps test (see below) with name plate value (3) As with all testing and inspections, the motor name plate provides valuable information that will help to ascertain the true health of the motor. If shaft rotation is free and smooth, bearing is possibly in good condition, otherwise consider replacing, repair or carry out further diagnosis. Look out for smooth and free shaft rotation. (2) Manually rotate motor shaft to examine bearing condition. Check for burnt, damage to body or cooling fan or shaft. The basic steps in ascertaining the health of a three-phase AC motor are given below:įor the three-phase motor, do the following:
0 kommentar(er)
