Hoʻohana nui ʻia ʻo Vacuum interrupter (VI) no ka contactor e hoʻopili pinepine a ʻoki i ka hana maʻamau o kēia manawa. ʻO kēia moʻo o ka mea hoʻoheheʻe ʻana e hoʻohana i ka envelope insulating ceramic a me nā mea hoʻopili Cu (W + WC) me ka waiwai ʻoki haʻahaʻa. ʻO kēia ʻano huahana ka nā hiʻohiʻona o ka hana hilinaʻi, ke ola lōʻihi, a me ka liʻiliʻi liʻiliʻi, etc. Contactor i kūlike me ia i nā pono o ka mālama maʻalahi, ʻaʻohe pilikia o ka pahū ʻana, ʻaʻohe haumia a haʻahaʻa haʻahaʻa, etc., a hiki ke hoʻohana nui ʻia i ka mana uila, mechanical, metallurgical, chemical and mine department, etc., e hoʻomalu i ka hoʻouna ʻana a me ka ʻōnaehana hoʻolaha.
