Special Features:

Major components: case 1; actuator 1; contact sets 3; poles 3; arc chute 3; trip-free mechanism 1;

Properties:

Two or more different types of items, having a common mounting or mounted on each other, which together form a portion of a circuit breaker, but which in itself is not a complete functioning item and cannot be assigned a more definite item name. Excludes coil, electrical; thermal release, circuit breaker; and tripper, circuit breaker.