Vacuum interrupter(VI) ya contactor imagwiritsiridwa ntchito kulumikiza pafupipafupi ndikudula njira yanthawi zonse. mawonekedwe odalirika, moyo wautali, ndi kukula kochepa, etc.Contactor yofanana nayo ili ndi ubwino wokonza zosavuta, palibe chiopsezo cha kuphulika, palibe kuipitsidwa ndi phokoso lochepa, etc., ndipo ingagwiritsidwe ntchito kwambiri mu mphamvu yamagetsi, makina, metallurgical, mankhwala ndi mgodi dipatimenti, etc., kulamulira kufala ndi kugawa system.It makamaka oyenera ntchito pafupipafupi kudula inductive katundu ndi ntchito m'malo amene ntchito pafupipafupi.
