ZW8-12/C intelligent outdoor high voltage vacuum circuit breaker (hereinafter referred to as intelligent circuit breaker) is used for AC 50HZ, voltage 10-12kv three-phase power system, used as breaking, closing load current, it has overload and short circuit Protection function, quick-break protection function, definite time demonstration protection function, automatic reclosing function, and also can be equipped with lightning arrester or isolation switch according to the user's needs (namely circuit breaker and isolation switch combination, hereinafter referred to as “combination intelligent circuit breaker”). The intelligent circuit breaker has its own power supply, which can be operated remotely and is equipped with CT and PT interfaces to meet telemetry requirements.