GB1309509A - Motor and manually operated control device for circuit-breakers - Google Patents

Abstract

1309509 Automatic circuit-breakers; actuation of switches MERLIN GERINE 9 Aug 1971 [10 Aug 1970] 37377/71 Heading H1N A motor and manually-operable control device for a circuit-breaker having a pivoted operating lever 26 controlled by a slide 30 and movable abruptly into the contacts-closed position upon the release of a charged spring 44 by operation of a catch member 60, comprises a rotary member 74 with a manually- or motor-controlled unidirectional, intermittently movable cam 96 co-operating during opening movement of the handle with a roller 48 on the slide 30 and disengaging therefrom at the end of the opening movement to allow the slide to be moved in the opposite direction when spring 44 is released the spring being charged during said opening movement. Member 74 is moved by an electric motor 66, Fig. 4 (not shown), or by a lever 86, via respective riders 72, 82, on the flange of the member 74 and serving alternately as driving element or retaining element in similar fashion to the disclosure of Specification 1,103,239. A declutching lever 90 is acted upon via an adjustable stop screw 108 on a lever 104, when the latter is engaged by a pin 102 or cam 96 at the end of the spring charging movement, to interrupt the mechanical connection between the motor 66 and the member 74 and allow the motor to stop freely upon its simultaneous deenergization by cam 96 operating a microswitch 100. Catch 60 is released by manual actuation of a push rod 116 via its button 114 or electromagnetically by solenoid device 110 attracting the tail 112 of catch 60. A changeover switch 160 has an actuating lever 162 which so cooperates with lever 90 that motor 66 can be energized only when lever 90 is in its inoperative position and that device 110 can be energized only when lever 90 is in its operative position. The electrical supply connections are completed when a pivotally mounted terminal block 126 plugs into a terminal block 124 upon depression of a button 130, Fig. 5, and the blocks are latched together by a projection 136 only if the mechanism fixing screw 18 is tightened correctly. Without correct plugging in of block 126, neither motor 66 nor device 110 can operate, and further means prevent operation of rod 116 until a surface 156 of block 124 causes a member 148 to release the slider 122 by which rod 116 releases the catch member 60. A keyoperated locking arrangement, Figs. 6, 7 (not shown), locks block 126 in its unplugged position only when the circuit-breaker is open. An indicator is provided for this.