Patent ID: 6020567
Filing Date: 2000-02-01
Classification: H01H

Abstract:
An operation apparatus of a circuit breaker provided with a mobile contact and a fixed contact, the mobile contact is pressed against the fixed contact or drawn apart from the fixed contact, comprising:an operation rod fixed to the mobile contact and held to be movable with respect to the fixed contact;a mobile member movably connected to the operation rod, a relative movable range of the mobile member to the operation rod being limited within a predetermined value;a first elastic member for urging the operation rod with respect to the mobile member in a direction in which the mobile contact is pressed against the fixed contact;a fixed member for movably holding the mobile member;a second elastic member for urging the mobile member with respect to the fixed member in a direction in which the mobile contact is drawn apart from the fixed contact;a permanent magnet for driving the mobile member with respect to the fixed member in a direction in which the mobile contact is pressed against the fixed contact;an operation electromagnet for applying a magnet force to the permanent magnet so as to drive the mobile member; anda power supply circuit for energizing the operation electromagnet.