SELECTOR SWITCH ASSEMBLY FOR LOAD TAP CHANGER

摘要

A selector switch assembly for a load tap changer includes a bevel gear structure coupled with a motor drive shaft. A shaft assembly is coupled with the bevel gear structure and a switch is provided for each phase. Each switch includes a helical gear fixed to the shaft assembly, a Geneva pinion gear engaged with the helical gear, a first Geneva gear wheel mounted on a first shaft moved by a first follower of the pinion gear, a first contact arm associated with the first Geneva gear wheel so as to rotate therewith, a second Geneva gear wheel mounted on a second shaft that is concentric with the first shaft and moved by a second follower of the pinion gear, and a second contact arm associated with the second Geneva gear wheel so as to rotate therewith. The contact arms include contacts that engage fixed contacts that define tap positions of the load tap changer.