Abstract: A position locking device is disclosed for a draw-out circuit breaker. In at least one embodiment, the position locking device includes a screw rod, a catching plate, a positioning plate, a locking plate, and a push rod. The screw rod has key ways. The catching plate has a catching plate hole and a protrusion that can be inserted into the key ways. Positioning notches for limiting OFF, TEST, and ON positions of the circuit breaker are formed on the top surface of the positioning plate, and corresponding protruding platforms are disposed on the bottom surface. One end of the locking plate bears against the bottom surface of the positioning plate, and the other end is locked to or unlocked from an outward protruding platform of the catching plate. One end of the push rod passes through the catching plate hole, and has an inclined surface. When the push rod is pushed, the inclined surface makes the catching plate leave the key ways.

Abstract: A position locking device is disclosed for a draw-out circuit breaker. In at least one embodiment, the position locking device includes a screw rod, a catching plate, a positioning plate, a locking plate, and a push rod. The screw rod has key ways. The catching plate has a catching plate hole and a protrusion that can be inserted into the key ways. Positioning notches for limiting OFF, TEST, and ON positions of the circuit breaker are farmed on the top surface of the positioning plate, and corresponding protruding platforms are disposed on the bottom surface. One end of the locking plate bears against the bottom surface of the positioning plate, and the other end is locked to or unlocked from an outward protruding platform of the catching plate. One end of the push rod passes through the catching plate hole, and has an inclined surface. When the push rod is pushed, the inclined surface makes the catching plate leave the key ways.

Abstract: A crank handle apparatus for a draw-out circuit breaker is disclosed. In at least one embodiment, the crank handle apparatus includes a crank, a locating piece, a button, a locking plate provided with a projecting part, and a retractable connecting link. A taken-in locking slot and a draw-out locking slot are provided in both ends of the crank. The locating piece includes a drawing gear which is wedged into the taken-in locking slot and the drawn-out locking slot respectively, and a locating slope which is connected with a locating spring apparatus. A button slope is provided in the button. A first resetting spring apparatus is provided in the button slope. A slope part of the button slope and a slope part of the locating slope are opposite and are in contact with each other. The projecting part is suppressed against or departed from the locating piece when the locking plate is moved.