Kufotokozera Kwachidule:

HM4 sing'anga-voltage circuit breaker imagwiritsa ntchito mpweya wa sulfure hexafluoride (SF6) ngati sing'anga yozimitsa ndi insulating. SF6 mpweya ali yosalala kuswa makhalidwe, ndipo pamene kuswa panopa mmenemo, palibe chopping chopping panopa ndipo palibe overvoltage ntchito kwaiye. Khalidwe labwino kwambirili limatsimikizira kuti wowononga dera amakhala ndi moyo wautali wamagetsi. Kuphatikiza apo, pakugwira ntchito, sizikhudza kugwedezeka kwa zida, dielectric level, komanso kupsinjika kwamafuta. Mzere wa pole wa wophwanyira dera, ndiye kuti, gawo lachipinda chozimitsira arc, ndi njira yotsekera yopanda kukonza kwa moyo wonse. Moyo wake wosindikiza umagwirizana ndi miyezo ya IEC 62271-100 ndi CEI17-1.