Fault handling method in the operation of AC contactor - Master's thesis - Dissertation

Probe current voltage pin 420*4450 head diameter 5.0 over current current and voltage pin

Photocoupler

The AC Contactor in operation is very noisy and can be processed as follows:

1. The power supply voltage is insufficient, and the suction of the electromagnet is insufficient to generate noise. Try to increase the voltage of the operating circuit.

2. If the magnetic system is improperly assembled or shaken by vibration or the parts are stuck, the iron core cannot be absorbed, resulting in noise. This system should be adjusted during processing to identify and eliminate the inflexibility of the machine.

3, the pole surface rust or foreign matter (such as grease, dust, hair, etc.) invade the core surface, at this time should clean the core surface.

4. Due to the excessive pressure of the contact spring, the electromagnet noise is generated, and the contact spring pressure is usually adjusted.

5. If the short-circuit ring breaks and produces noise, the iron core or short-circuit ring should be replaced.

6. The iron core pole surface is excessively worn and uneven, and the iron core should be replaced.

7, the coil short circuit between turns, usually replace the coil.