If the meter shows a low resistance value or continuity, the winding is grounded, and the motor requires repair or replacement. 5 to 5 ohms, depending on the motor size.
Confirming 3 Phase Motor Disconnection Test Properly
If the motor rotates opposite to the desired direction, swapping any two of the three power supply wires will correct it. Phase Rotation Verification While resistance checks confirm physical integrity, verifying phase rotation ensures the motor turns in the correct direction.
Measuring Resistance Between Terminals To check the windings, set your digital multimeter to the Ohms function. Verifying Disconnection Use the continuity function of your multimeter to confirm that the motor is completely disconnected from the supply.
Confirming 3 Phase Motor Disconnection Test with a Multimeter
The resistance between the ends of each winding should be identical, indicating balanced manufacturing. Set the multimeter to measure resistance and place one probe on a clean, unpainted metal surface on the motor housing.
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