... distribution system in industry. Applications: Protective functions against short circuit and overload, and are used in lighting distribution system ... single pole, 400V in double, three or four poles for protecting overload and short circuitMeanwhile, they are also used in ... 60,000Mechanical life (times): 8,000 Square D-1 Circuit Breakers with Bolt on Type,10KA Breaking Capacity, Black Bakelite Case