| 摘要 |
An operating mechanism for an autorecloser provides an improved form of mechanical interlock between the circuit breaker element (3) of an autorecloser and a disconnector (2) in electrical series with it A shaft (82) transmits linear motion between the circuit breaker's moveable contact and the profile of a bell crank (50), the bell crank being attached to a link (70) for manual rotation of the bell crank and also to a link (60) for moving a moveable contact (20) of the disconnector between CLOSED and OPEN positions. The geometry of the bell crank profile and linkages is such that when the bell crank is rotated clockwise through an angle X from a starting position in which the moveable contacts of both the circuit breaker and the disconnector are in the CLOSED position, the moveable contact of the circuit breaker is moved to an OPEN position while the moveable contact (20) of the disconnector is maintained CLOSED. During further clockwise rotation of the bell crank (50) through a further set angle Z to a predetermined limit of movement of the bell crank, the moveable contact (20) of the disconnector is moved to an OPEN position while the moveable contact of the circuit breaker is maintained in the OPEN position by a sector of the bell crank profile (59) which is of constant radius R2. When the bell crank (50) is rotated back to its starting position, the moveable contact (20) of the disconnector is moved back to its CLOSED position before the moveable contact of the circuit breaker is moved back to its CLOSED position.
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