The NDM3Z series of DC molded case circuit breakers (hereinafter referred to as circuit breakers) apply to the DC system application environment and the electric circuit with the rated working voltage of DC1000V and the rated working current of 800A. With the overload and short circuit protection functions, the circuit breaker can protect lines and power equipment from damage. Products are widely used in the new energy, power generation, power transmission, communication, industrial control, real estate, electric power, rail transportation, project (public) construction and etc.