SHORT CIRCUIT CURRENT-RESISTANT AND ARC-EXTINGUISHING DC RELAY

摘要

A short circuit current-resistant and arc-extinguishing DC relay comprises two stationary contact lead-out ends, a movable spring plate in the form of a flat plate, a push rod assembly, an upper fixed yoke, an upper follower yoke, and a lower armature. The upper fixed yoke is fixed to the push rod assembly and positioned above the movable spring plate in a location corresponding to a location between two movable contacts. The upper follower yoke is fixed to the push rod assembly and positioned above the movable spring plate in a location corresponding to the location between the two movable contacts. The lower armature is fixed to a bottom end surface of the movable spring plate. The upper fixed yoke, the upper follower yoke and the lower armature are respectively arranged in a width direction of the movable spring plate, and form two magnetic conductive loops in the width direction of the movable spring plate. The above arrangement can enhance electromagnetic attraction, thereby achieving a short-circuit current resistance up to the 16 kA level for a product.