Two-step operating mechanism for combined interrupter disconnect switch

摘要

An operating mechanism for a combined interrupter and disconnect switch comprises an operating crank and an interrupter support housing which are separately rotatable about a common pivotal axis. The interrupter switch is part of a disconnect switch arm and is secured to the support housing. The interrupter contacts are operated by a linearly movable rod which has an end connected to a lever extending from the operating crank and is movable thereby. A crank arm connected to said operating crank is connected to and moved by a linearly movable operating shaft. A spring-biased latch lever is pivotally mounted to the interrupter support housing and releasably engages the free end of the crank arm lever so that the housing rotates with the crank for a first portion of the rotation of the crank and closes the disconnect switch. When the disconnect switch closes, the latch releases and the crank rotates relative to the housing to operate the linearly movable rod which operates the interrupter switch.