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- Mar 26, 2018
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Typically a contactor is used as an electrical switch for loads which exceed the limits of a relay. It is better suited for handling the high inrush current of a motor.
A contactor will have a coil which is typically controlled by your on-off switch. Control voltage is typically between 24V AC/DC to 240 AC. You can identify the coil by two additional wires going into the device besides the 3 phases in and out (I cannot see these in your images, but it might be out of view). The contactor will likely have laminated steel plates as it is a big solenoid.
If this is the device in your panel, you would need to trace the coil to determine why voltage is not applied. If voltage is applied, but it is not starting the motor, then the coil is burnt out and the contactor should be replaced.
A contactor will have a coil which is typically controlled by your on-off switch. Control voltage is typically between 24V AC/DC to 240 AC. You can identify the coil by two additional wires going into the device besides the 3 phases in and out (I cannot see these in your images, but it might be out of view). The contactor will likely have laminated steel plates as it is a big solenoid.
If this is the device in your panel, you would need to trace the coil to determine why voltage is not applied. If voltage is applied, but it is not starting the motor, then the coil is burnt out and the contactor should be replaced.
