ʻO ka wehewehe pōkole:

Hoʻohana ka mea hoʻoheheʻe kaapuni waena-voltage HM4 i ke kinoea sulfur hexafluoride (SF6) ma ke ʻano he mea hoʻopau arc a insulating. Loaʻa i ke kinoea SF6 nā hiʻohiʻona haʻihaʻi maʻemaʻe, a i ka wā e haki ai i kēia manawa, ʻaʻohe mea ʻoki ʻoki i kēia manawa a ʻaʻohe hana overvoltage i hana ʻia. ʻO kēia hiʻohiʻona maikaʻi loa e hōʻoia i ka lōʻihi o ke ola uila o ka mea haʻihaʻi kaapuni. Eia kekahi, i ka wā o ka hana ʻana, ʻaʻohe hopena i ka haʻalulu o ka mea hana, ka pae dielectric, a me ke kaumaha wela. ʻO ke kolamu pou o ka mea haʻihaʻi kaapuni, ʻo ia hoʻi, ka ʻāpana o ke keʻena hoʻopau arc, he ʻōnaehana pani ʻole mālama ʻia no ke ola. Hoʻopili kona ola hoʻopaʻa ʻana me nā kūlana IEC 62271-100 a me CEI17-1.