| 摘要 |
A medium voltage circuit breaker and switch having first and second stationary contacts, a mobile conducting bridge equipped with first and second movable contacts, an operating mechanism coupled to said bridge. The switch further having a vacuum cartridge containing a third stationary contacts electrically connected to the second stationary contacts, a third movable contact electrically connected to said bridge, and mechanically coupled to said operating mechanism, and sequencing means designed to establish the opening and closing sequences of the first, second, and third contacts cooperating with the operating means so that in the course of opening or closing operations of the switch, the third stationary and movable contacts close momentarily to switch the arc associated with the first stationary and movable contacts or with the second stationary and movable contacts.
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