When the AC contactor is working, it will connect or disconnect the circuit, so arc and corona discharge phenomena will be generated on the contacts, resulting in buzzing noise.
When the contacts on the AC contactor connect the circuit, the potential difference due to the resistance will cause arc discharge between the contacts. The arc phenomenon will last for a period of time and produce very high temperatures and light radiation, thus producing a certain amount of noise.
In addition, when the arc disappears, the electric field formed between the contacts will not disappear immediately, but will generate high voltage in an instant, causing the corona discharge phenomenon. The corona discharge phenomenon also produces sound.
Therefore, the AC contactor will produce arc and corona discharge phenomena during operation, resulting in the generation of buzzing sound. This sound is usually very faint, but may be heard under certain circumstances, such as a quiet night or when the contactor is installed close to your ear.
Post time: Mar-11-2024
