6KV 12KV 160A 800A Three Phase High Voltage Vacuum Contactor AC Contactor 3 Rh 1921 Contactor De 30 Amp 25 63a Dc

This series of vacuum contactor use overall insulation frame structure with high - quality vacuum switch tube , and secondary control is simple and reliable , stable performance, the external installation of the overall insulation cover , beautiful outlook.

Vacuum contactors utilize vacuum bottle encapsulated contacts to suppress the arc. This arc suppression allows the contacts to be much smaller and use less space than air break contacts at higher currents. As the contacts are encapsulated, vacuum contactors are used fairly extensively in dirty applications, such as mining.

Vacuum contactors are only applicable for use in AC systems. The AC arc generated upon opening of the contacts will self-extinguish at the zero-crossing of the current waveform, with the vacuum preventing a re-strike of the arc across the open contacts. Vacuum contactors are therefore very efficient at disrupting the energy of an electric arc and are used when relatively fast switching is required, as the maximum break time is determined by the periodicity of the AC waveform.