Circuit breaker e.g. three-position circuit breaker, for use in gas-insulated switchgear, has three contact units, of which one contact unit is arranged between inner surface of one of three connections and outer surface of casing

摘要

The circuit breaker (1) has two connections (2, 3) with respective pins (5, 8), and a casing (14) with an opening dimension larger than a cross-section dimension of the pins of the connections. A third connection (4) is provided with an opening having a dimension larger than an outer dimension of the casing, and three contact units (7, 12, 17), of which the third contact unit is arranged between an inner surface of the third connection and an outer surface of the casing, when the casing is displaced between the pin of the connection (2) and the connection (4).