Special Features:

Major components: common-trip 3, interpole barrier 2, quick make, quick break mechanism 1, de-ion arc quencher 3, silver alloy contact 3;

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.