Takaitaccen Bayani:

Matsakaicin wutar lantarki na HM4 yana amfani da iskar sulfur hexafluoride (SF6) azaman matsakaicin kashewa da rufewa. Gas na SF6 yana da halaye masu tsinkewa mai santsi, kuma lokacin da ke karya halin yanzu a cikinsa, babu wani abin tsinkewa na yanzu kuma ba a samar da ƙarin ƙarfin aiki ba. Wannan kyakkyawan halayen yana tabbatar da cewa mai haɗawa yana da tsawon rayuwar lantarki. Bugu da ƙari, yayin aiki, ba shi da wani tasiri a kan girgiza kayan aiki, matakin dielectric, da damuwa na thermal. Rukunin sanda na mai watsewar kewayawa, wato, ɓangaren ɗaki mai kashe baka, tsarin rufaffiyar da ba shi da kulawa don rayuwa. Rayuwar hatimin ta ta bi ka'idodin IEC 62271-100 da CEI17-1.