TOB1-63C(C10) series circuit breaker belongs to the advanced level of themineties in the world insteda of the old generation of C45N. They have protective functions as shortage and overloading, and are used in lighting distribution system in industry, commerce and dwelling, and protect fractional electric motors. Andthey also have many merits of high protective grade(up ot Ip20), high breaking capacity, good reliability of sensitive action, comveniet multipole assorting, long using life ect, They are mainly adapted to yhe circuit of AC 50Hz, 230V in single pole, 400V in double, three or four poles for protecting overload and shortage. Meanwhile, they are also used in turning on or off the electric apparaturs and lighting circuit under the normal condition.