SWITCHGEAR OPERATING MECHANISM

摘要

An operating mechanism for a switchgear unit is disclosed. The operating unit includes an input drive shaft operable to rotate and counter-rotate. A trip linkage has a cam disk rotatably coupled to the input drive shaft and is coupled to a spring-drive mechanism for opening and closing the vacuum interrupter. An over-center linkage has a drive link rotatably coupled to the input drive shaft, and a follower link for opening and closing the isolating disconnect. Rotation of the input drive shaft through a first range drives the trip linkage for opening the vacuum interrupter and moves the drive link though an over-center position without opening the isolating disconnect. Rotation of the input drive shaft though a second range drives the over-center linkage for opening the isolating disconnect after the vacuum interrupter is opened.

主权项

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 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 input 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 having a drive link rotatably coupled to the input 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 rotation of the input drive shaft through a first range 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 rotation of the input drive shaft though a second range drives the over-center linkage for opening the isolating disconnect after the vacuum interrupter is opened.