Circuit switching mechanism and charging system therefor

摘要

A circuit switching mechanism for use in a high voltage circuit breaker is disclosed. The disclosed mechanism comprises a charging system (12); trip latch mechanism (14); an opening spring (16); a closing spring (18) positioned coaxially with the opening spring; a support structure (22) supporting the open and closing springs; and a first rod member (24) operatively associated with a circuit interrupter, the first rod member being operatively coupled to the open and closing springs such that discharging of the opening spring effects the movement of the first rod member in a first direction and discharging of the closing spring effects the movement of the first rod member in a second direction. The charging system (12) for charging the open and closing springs comprises a motor; a worm gear coupled to the motor; a cam coupled to the worm gear, the worm gear transmitting rotational energy from the motor to the cam; a roller follower comprising a first roller bearing against the cam, the roller follower moving linearly in response to rotation of the cam; and a push rod coupled to the roller follower, the push rod moving linearly with the roller follower and engaging the support structure.