Patent ID: 8040663
Filing Date: 2011-10-18
Classification: H01H

Abstract:
1. A lockout arrangement for use with a separately-derived transfer switch having a mains switch, a generator switch, a mains neutral switch, and a generator neutral switch, the arrangement comprising: a first movable lockout movable between a first position and a second position, wherein the first movable lockout controls movement of the mains switch and the mains neutral switch; a second movable lockout movable between a third position and a fourth position, wherein the second movable lockout controls movement of the generator switch and the generator neutral switch; and a third lockout movable between a fifth position and a sixth position, and wherein the third lockout is only movable from the fifth position to the sixth position if the first movable lockout is in the second position; wherein the first movable lockout restricts simultaneous switching of the mains switch and the mains neutral switch, the second movable lockout restricts simultaneous switching of the generator switch and the generator neutral switch, and the third lockout prevents both the mains neutral switch and the generator neutral switch from being in a conductive position simultaneously.