摘要：【中文】本发明涉及高压直流断路器领域，具体涉及一种高压直流断路器。本发明通过将高压直流断路器的快速机械开关设置在断路器阀塔的外部，只需考虑快速开关与其余部分的电气距离，在分合闸过程中，快速机械开关的振动不会对断路器阀塔造成影响，电磁兼容性能优良，同时快速机械开关落地式布局，方便设备运行维护。本发明中高压直流断路器的快速机械开关采用SF6快速开关，能够提高开关的灭弧能力以及开断容量，对于较高电压等级，采用SF6灭弧介质，有利于减少断路器断口数量，避免断路器多断口间开关特性不一致的情形，提高断路器的可靠性，同时SF6具有较快的反应速度。 【EN】The invention relates to the field of high-voltage direct-current circuit breakers, in particular to a high-voltage direct-current circuit breaker. According to the invention, the quick mechanical switch of the high-voltage direct-current circuit breaker is arranged outside the breaker valve tower, only the electrical distance between the quick switch and the rest part needs to be considered, the vibration of the quick mechanical switch cannot influence the breaker valve tower in the opening and closing process, the electromagnetic compatibility performance is excellent, and meanwhile, the floor type layout of the quick mechanical switch is convenient for equipment operation and maintenance. The quick mechanical switch of the high-voltage direct-current circuit breaker adopts the SF6 quick switch, the arc extinguishing capability and the breaking capacity of the switch can be improved, for a higher voltage grade, the SF6 arc extinguishing medium is adopted, the reduction of the number of the breaker breaks is facilitated, the situation that the switching characteristics of the breaker multi-break are inconsistent is avoided, the reliability of the breaker is improved, and meanwhile, the SF6 has a higher reaction speed.