NB8 circuit breaker the new type we developed , which is used in lighting distribution system or motor distribution system for protecting overload snd short circuit in the system. The product is neoteric in structure light in weight, reliable and excellent in performance. Its frame and parts adopt plastics of high fire resistant and shockproof. The product overload and short circuit protection, as well as for unfrequently switching on&off electric equipment and lighting circuit in normal case. The product comply with IEC60898.