... , block of flats, high buildings, squares, airports, railway stations, plants and enterprises in AC circuits 240V (single pole)up to 415V (3 pole ... ) 50Hz for protection of overload short circuit and for circuit change-over in lighting system ... ; AC400V 2P, 3P 3000AElectrical life: 4,000 times BH Miniature Circuit Breakers MCB with Black Bakelite Shell Case