| 摘要 |
A high or medium voltage gas insulated earthing switch comprises at least one conducting bar (1) in an enclosure (5), with a corresponding earthing contact (2) and a phase contact (1A) fixed to the said bar that will be electrically connected to the earthing contact to earth the said bar. The earthing contact (2) is installed fixed in the enclosure (5) facing the phase contact (1A), leaving a free space (E) between this phase contact and the earthing contact. A switching element (6) is installed free to move in the enclosure between the phase contact and the earthing contact, and comprises firstly a switching contact (8) that short circuits the space left free (E) to electrically connect the earthing contact and the phase contact when the earthing switch is closed, and secondly an at least partly electrically insulating support (7) on which the switching contact is fixed such that the switching contact is electrically isolated from the phase contact and from the earthing contact when the earthing switch is in an open position.
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