Model HD13-200/31 open type knife switch has the following advantages:   1. High safety: this knife switch adopts mechanical locking and electrical isolation design, which can effectively prevent the occurrence of electric shock accident. When it is necessary to cut off the power, the handle can only be pushed to the closed position by manual operation, which ensures the safety of users.   2. Reliable: HD13-200/31 knife switch is strictly tested and quality controlled to have high reliability and stability; under normal working condition, it can run stably for a long time and reduce the possibility of failure.   3. Multi-functionality: HD13-200/31 knife switch has many different wiring options, applicable to different voltage levels and current capacity of the circuit; at the same time, it can also be used as an overload protection, short-circuit protection and leakage protection devices, providing comprehensive protection functions.   4. Economical and practical: Compared with other types of switches, HD13-200/31 knife switch is relatively low in price and easy to maintain and replace; for some small or temporary power needs, this switch can meet the basic needs without spending too much money.   5. Portable and easy to use: Because the HD13-200/31 knife switch is usually small in size and light in weight, it is very easy to carry and use. Whether it is used for controlling household electrical equipment or managing power supply in industrial production lines, it can be flexibly installed and adjusted.