High voltage circuit switch arrangement

摘要

A rapid opening and closing interrupter includes a stationary contact mounted in a cylindrical housing and a moving contact mounted on an operating rod by an opening spring. A trailer formed of a material that produces an arc quenching gas when exposed to an arc is mounted on the moving contact, and an engaging nipple is formed on the end of the trailer. A snap spring engages the nipple in such a manner that when the operating rod is moved in a direction to open the contacts, the contacts remain in engagement until the force exerted by the opening spring overcomes the force exerted by the snap spring on the engaging nipple causing the contacts to snap open rapidly. Vent holes are provided in the moving contact so that arc gase, formed during closing by the pre-strike arc, are released from a gas confining area between the moving contact and the trailer through the vent holes so that a net force results against the trailer in the direction of closing thereby causing the moving contact to accelerate towards closing with the stationary contact.