Patent ID: 9685280
Date: 2017-06-20
CPC Classifications: H01H

Claim:
1. A operating mechanism for a switch gear unit including a vacuum interrupter having an open state and a closed state coupled in series with a isolating disconnect having an open state and a closed state, the operating mechanism comprising: an input drivetrain including a drive shaft operable to rotate in a first direction for opening the vacuum interrupter and the isolating disconnect and to counter rotate in a second direction for closing the vacuum interrupter and the isolating disconnect; a trip linkage having a cam disk rotatably coupled to the drive shaft, an opening latch coupled to a spring-drive mechanism for opening the vacuum interrupter, and a linkage cooperating with the cam disk to trip the opening latch; an over-center linkage system having a drive link rotatably coupled to the drive shaft, a connecting link having a first end pivotally connected to the drive link and second end pivotally connected to a follower link for opening the isolating disconnect, wherein initial rotation of the drive shaft in the first direction drives the trip linkage for opening the vacuum interrupter and moves the drive link though an over-center position without opening the isolating disconnect; and wherein continued rotation of the drive shaft in the first direction drives the over-center linkage system for opening the isolating disconnect after the vacuum interrupter is opened.