本產品為采用永磁操動機構操作的戶內三相交流真空斷路器，額定電壓 12kV, 額定頻率 50Hz，額定電流 630A-3150A, 短路電流 16kA-40kA。可直接用于 KYN28 型開關柜，無需對柜體做任何改動。

技術特點

本產品將真空、永磁、智能控制等多項技術融于一體，在保持 ZN73 型戶內真空斷路器原有優點的同時，更具有以下優點：優良的控制技術與長壽命由于采用高性能永磁材料和采用高檔微機設計的控制，通過本公司專有的控制技術，調節永磁機構線圈驅動功率，以獲得斷路器較佳分、合閘曲線、并使分、合末端有效的實現了軟著陸， 大幅度降低了機械碰撞，較大的提高了機構構件的壽命。也免除了操作過程中，動、靜導電桿因機構碰撞而積累的機構形變及所造成的超行程、開距變化。使用戶無需再作調整。 

本斷路器的性能達到了業內前所未有的高度，在操作正常負荷電流時，免維護、免調整、頻繁中作場所更能突顯本斷路器的優良性能。

This products use permanent magnetic mechanism for the operation , rated voltage 12KV, rated frequency 50HZ, rated current 630A-3150A, short circuit current 16KA-40KA. It can be directly used in KYN28 switch cabinet, without any change to the cabinet.

Technical features

This product integrates vacuum, permanent magnet, intelligent control and other technologies. While maintaining the original advantages of ZN73 indoor vacuum circuit breaker, it has the following advantages: leading control technology and long service life. With the control of high-performance permanent magnet materials and high-grade microcomputer design, through the company's proprietary control technology, the coil driving power of permanent magnet mechanism is adjusted to obtain the best opening and closing curves of the circuit breaker, and the opening and closing ends effectively realize the soft landing, greatly reducing the mechanical collision. It also avoids the mechanism deformation accumulated by the mechanism collision between the moving and static conductive rods and the overtravel and distance change caused by the mechanism collision in the operation process. So that users do not need to make adjustments.

The performance of such circuit breaker has reached unprecedented heights in the industry, with a long service life of 20 years. During the operation in normal load current, no need any maintenance, adjustment and can be worked in frequently operation, shows its’ superiority characteristics.