Patent ID: 8884728

Claim:
A stationary contact arm assembly for a molded case circuit breaker, the stationary contact arm assembly comprising: a current limiting type stationary contact arm comprising a terminal portion at a first lengthwise end and a contact portion at a second lengthwise end; an inclined extension portion provided between the contact portion and the terminal portion, the inclined extension portion downwardly inclined from the terminal portion; a flat extension portion vertically spaced apart from a bottom surface of the contact portion such that a space is formed between the flat extension portion and the bottom surface of the contact portion; a bent portion formed in a bent shape from the flat extension portion to the contact portion; a magnet assembly comprising a plurality of steel plates, at least part of the magnet assembly installed in the space between the flat extension portion and the contact portion in order to enhance magnetic permeability and increase an electromagnetic repulsive force during a current limiting operation; and an elastic support plate installed on the flat extension portion and comprising an elastic support portion in order to support the magnet assembly, the elastic support portion comprising a plurality of long perforated hole portions and a plurality of body portions formed between the plurality of long perforated hole portions.