| 摘要 |
A circuit interrupter manually opens and closes its contacts by use of a manually rotatable handle which acts through a collapsible linkage rotatably connected to a crank extension of the handle and rotatably connected to a rotatably movable contact support. The rotatable contact support is urged away from closed contact position by a main spring and in moving from one contact position to the other the axis of the rotatable connection between the handle crank passes over a center line defined by the center of rotation of the handle and the rotatable connection between the linkage and the movable contact support providing a toggle action to hold the movable contact in selected open or closed position. Upon overload, the mechanism causes collapse of the collapsible linkage allowing the movable contact support to move and open the contacts. A center trip stop member, normally not interfering with the handle, is supported to be moved relative to the mechanism by structure connected to the movable contact arm to a position obstructing the handle switch movement and holding it in center trip position. An auxiliary switch for indicating trip condition may be provided with the circuit interrupter. A spring biased switch operator may be operated by a rotatable actuator pivotally supported on a frame member of the circuit interrupter whereby the collapsing linkage rotates the actuation into engagement with the switch operator of the auxiliary switch, thus actuating the auxiliary switch.
|
