Covers circuit protectors with the following characteristics: (1) Stationary type of 2-pole or 3-pole construction; (2) Having one or more rated maximum voltages of 508 V and 254 V rms for application on systems having nominal voltages of 480 V and 240 V rms; (3) Manually operated or power operated; (4) With current limiting uses such that the entire device is suitable for application on circuits capable of delivering not more than 200000 A rms symmetrical short-circuit current.