- #AC MOTOR WINDING HOW TO#
- #AC MOTOR WINDING GENERATOR#
- #AC MOTOR WINDING FULL#
- #AC MOTOR WINDING FREE#
#AC MOTOR WINDING GENERATOR#
Deviations from rated FLA could signify problems with the motor under test.AC Motor Winding | Generator Series Courseware | Pengkyįor the generator, the winding is the component that generates the electromotive force, for the motor, the winding is the component that generates the mechanical force.
#AC MOTOR WINDING FULL#
With the motor running, check the full load amps (FLA) with a suitable meter or preferably a clamp on meter and compare with the name plate FLA.
#AC MOTOR WINDING HOW TO#
See how to measure insulation resistance of Electric Motor Minimum test value of motor insulation resistance is 1 Meg Ohm (1 MΩ). Check from phase to motor frame (earth) (U to E, V to E, W to E ). Check from phase to phase (U to V, V to W, W to U). Set the voltage setting of the insulation resistance tester to 500V. For a three phase motor, insulation resistance is usually measured between each motor winding or phase and between each motor phase and motor frame (earth) using an insulation tester or megger.
Insulation resistance failure of an electric motor is one of the first signs that the motor is about to fail. Remember that the three phases have identical windings or nearly so! U, V, W is a European winding designation.Ĭheck the motor winding resistance or ohms reading using a multimeter or ohmmeter for phase to phase terminal ( U to V,V to W ,W to U ).The ohms reading for each winding must be the same (or nearly the same). Please see how to identify three phase windings for proper winding identification. If any particular phase fails the continuity test, your motor is probably burnt. Using a multimeter, check the continuity of motor winding from phase to phase ( U to V, V to W, W to U ).Each phase to phase must have a continuity if winding is OK. For three phase motors, connection type is either Star (Y) or Delta Check the connection bar for terminal (U, V, and W). Ensure the terminal for power supply is in good condition. Check that the correct voltage is applied to the motor using a multimeter. 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.
#AC MOTOR WINDING FREE#
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: