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If a contactor need to replace with faulty one. what I want
to check?
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Answer Posted / suga priya
simple multimeter is used to check for failure. The coil can become shorted, grounded, or open. The coil can become shorted when the insulation between the wires in the coil breaks down. This can be found by shutting off the power and taking a resistance reading between the terminals on the coil. The reading should be around 20 ohms, if it is significantly less, the contactor should be replaced
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