Medium voltage circuit-breaker for outdoor use

摘要

#$%^&*AU2011203270A120120202.pdf#####Abstract Medium voltage circuit-breaker for outdoor applications comprising at least one pole part (3a - 3c) with inner 5 electrical contacts, operated by actuator means via a jackshaft arrangement (6) accommodated in an enclosed main housing (2) having a mounting surface (8), on which the pole part (3a - 3c) is removable attached wherein an elastomeric sealing ring (9) is arranged between the end 10 surface of the pole part (3a - 3c) and the corresponding mounting surface (8) of the main housing (2), wherein at least a section (10) of the sealing ring (9) consists of a solid porosity material, in order to ensure an air exchange between the inside and the environment. 15 See Figure 2 2728446_1 (GHMatters) P87518.AU 4/07/11-3