TheChotsekera dera la HM4 chapakati-voltagentchitompweya wa sulfure hexafluoride (SF6)monga chozimitsira ndi chotetezera kutentha.
Mpweya wa SF6Ili ndi mawonekedwe osalala osweka, ndipo ikasweka mphamvu yamagetsi, palibe vuto la kudula mphamvu yamagetsi ndipo palibe mphamvu yamagetsi yochulukirapo yomwe imachitika.
Izikhalidwe labwino kwambirizimaonetsetsa kuti chodulira magetsi chimagwira ntchito nthawi yayitali.
Komanso, panthawi yogwira ntchito, sizikhudza kugwedezeka kwa chipangizocho, kuchuluka kwa dielectric, komanso kupsinjika kwa kutentha.
Mzati wa pole wa circuit breaker, ndiko kuti, gawo la chipinda chozimitsira arc, ndi njira yotsekedwa yopanda kukonza kwa moyo wonse. Nthawi yake yotsekera ikugwirizana ndi miyezo ya IEC 62271-100 ndi CEI17-1.
