Introduction
SFB5T-125 series circuit breakers (hereinafter referred to as circuit breakers) are mainly used for AC 50Hz, rated working voltage 230V/400V, and rated current 125A and below. For distribution lines with rated ultimate short-circuit breaking capacity not exceeding 1000OA, it can be used for overload and short-circuit protection, as well as infrequent on-off operation and switching of lines. The circuit breaker is mainly used in various places such as industry, commerce, high-rise buildings and civil residences.