| 摘要 |
The invention relates to a switching device for short-circuiting and earthing at least two phases in an electric power network. The device comprises a first phase contact (1), a second phase contact (2) and an earthed, movable contact (4), which can, on the one hand, assume a first position, where the contact (4) is insulated from the phases, and, on the other hand, a second position, where the contact is connected to the phase contacts and thereby earths and short-circuits the phases. The device is characterized in that the first phase contact and the second phase contact are axially displaced from each other and that they are disposed around the movable contact, and that the contact is cylinder-shaped and comprises two circumferentially disposed contact areas (18, 19; 34, 35), which are axially displaced from each other and intended to connect to the phase contacts in the second position, so that the phases are short-circuited and earthed via the contact, and that the device comprises electrically insulating areas (32; 33), which are adapted to abut against the phase contacts in the first position. |
