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Root cause of mechanical failure of AC contactor

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    The root cause of mechanical failure of AC contactor and Countermeasures

    1. Common fault causes of no reclosing after plug-in:

    A. short circuit of the solenoid power supply system line B. short circuit of the solenoid itself C. loose button of the incubator D. rated current of the solenoid is higher than the working voltage of the line e. the treatment for the middle of the circuit breaker and the wall of the arc extinguishing chamber is stuck or other moving parts are stuck with the fitness sports slide or guide slot A. check the line and find a single step solution

    B. remove and replace the specified solenoid C, remove and polish the circuit breaker or the key D, replace the solenoid e with the same rated current, adjust the relative parts of the parts stuck between each other, and remove the friction between them

    2. Common faults caused by excessive noise or vibration of transformer core during operation:

    A. the working voltage of the electromagnetic coil is not enough B. the total area of the iron core pole of the transformer is stained or damaged too much, resulting in uneven C. the short-circuit fault ring is broken D. the clamping screw of the iron core of the dynamic or static transformer is loose e. the moving part is not well matched with each other F. the Countermeasures for too much recoil force are as follows: A. adjust the working voltage of the electromagnetic coil B. remove the pole surface, and scrape and repair the iron core pole of the transformer if necessary Face C, remove and replace the new short-circuit fault ring D, tighten the screws e, carry out adjustment after finding out the common faults F, remove and replace the appropriate spring yellow

    3. After the start button is released, the AC contactor will release the common fault causes:

    A. the auxiliary circuit breaker of a C contactor is loose B. the control circuit breaker is loose C. the wiring of distribution circuit breaker is not in accordance with the regulations. Countermeasures: A. remove the auxiliary circuit breaker or replace it with a new one B. check the loose circuit breaker in many ways C. check the wiring and re wire it. 4. The posture of AC contactor is too slow. Common fault causes: a. the gap in the core of acoustic transformer Too large B. the installation position will not change C. the working voltage of the electromagnetic coil is not enough D. the counter measures are: A. adjust a part of the mechanical equipment to reduce the gap B. reassemble C according to the requirements of the commodity manual or technical standards, adjust the working voltage of the electromagnetic coil to make it pass D. replace the appropriate spring yellow and turn off the power supply, and the AC contactor will not be released. Common causes of faults:

    A. small recoil force B. excessive remanence C. the vegetable oil on the iron core of the AC contactor transformer is not wiped clean D. a part of the moving part is stuck e. the acoustic circuit breaker has been fused F. the control circuit wiring is in error

    A. replace the appropriate elastic yellow B. C. wipe the vegetable oil clean. D. check and eliminate the barricades or adjust the parts where the parts are stuck with each other. E. break the arc welded circuit breaker or remove the circuit breaker. F. search for the incorrect wiring with the digital multimeter, and then wire again.

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