BEY65-4 is a connection set used to easily connect the main poles of the Line, Delta and Star contactors of a star-delta starter for AF40...AF65, AFC40...AFC65 or AFS40...AFS65 contactor ranges. The BEY connection set is made up of: • Line contactor / delta contactor: upstream phase-to-phase connection • Delta contactor / star contactor: downstream connection in parallel • Star contactor: star point upstream • Insulated, solid copper bar.