AC contactor is generally used to turn on or off the power supply in the control circuit of electromechanical equipment, it can frequently turn on or off the AC circuit, and can realize long-distance control.
The toucher is mainly composed of a contact system and an electromagnetic system, and the problems of AC contactors are generally generated in the coil circuit, mechanical part and touch part. The following describes several common problem phenomena and how to deal with them:
Phenomenon: Immobility or unreliable movement.
Reasons:1. The control supply voltage does not match the coil voltage;
2. The power supply capacity of the operation circuit is insufficient or the wire is broken, the wiring is faulty and the control contact is poorly touched;
3. The power supply voltage is too low or fluctuates too much;
4. The power supply is too far away from the toucher, and the connecting wire is too thin;
5. Excessive contact tension spring pressure and overtravel;
6. Damage to the product itself (such as broken or burned coils, jammed mechanical movable parts, tilted shafts, etc.).
Solution:1. regulate the mains voltage;
2. Increase power supply capacity, correct and repair control contacts;
3. Replace the coil;
4. Replace the coil and remove the stuck fault;
5. Adjust the contact parameters as required;
6. Replace the thicker adapter wires.
Phenomenon: No release or slow release.
Reasons:1. Excessive pressure on the contact tension spring;
2. Contact fusion welding;
3. The mechanical movable part is stuck, and the shaft is tilted;
4. Damage to the reaction tension spring;
5. There is oil or dust on the core surface;
6. If the E-type core is used for too long, the demagnetized air gap disappears, and the remanence increases, so that the core is not released.
Solution:1. Replace intimate;
2. Sweep away fusion welding problems, repair or replace contacts;
3. Sweep away the stuck faults and repair the damaged parts;
4. Replace the reaction tension spring;
5. Organize the intimate pole surface;
6. Adjust the contact parameters.
Phenomenon: The coil is overheated or burned.
Reasons: 1. The polar surface of the communication core is uneven or the demagnetization air gap is too large;
2. The double coil of DC operation derived from the AC toucher is overheated due to the fact that the normally closed interlocking contact is not released by welding;
3. The frequency of operation is too high;
4. Poor coil production or mechanical damage, insulation damage, etc.;
5. The power supply voltage is too high or too low, 6. The moving part is stuck;
6. Special environmental conditions: such as humid air, corrosive gases or high ambient temperature;
7. The technical parameters of the coil (such as rated voltage, frequency, load factor and applicable working system, etc.) are inconsistent with the actual application conditions.
Solution: 1. Select other suitable touchers;
2. Interchange coils or touchers;
3. Adjust the power supply voltage;
4. Replace the coil and remove the fault that causes mechanical damage to the coil;
5. Adopt specially designed coil;
6. Sweep away the stuck phenomenon;
7. Remove the polar surface or exchange the core;
8. Adjust the interlocking contact parameters and replace the burned out coil.
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