High-speed Rail Surge Protector

my country's high-speed railway network is "eight vertical and eight horizontal", spanning a wide range of longitude and latitude, with diverse geographical and climatic environments. Most high-speed railway lines are viaduct sections, so lightning may hit different locations of the power supply system, causing lightning disasters. High-speed railway surge protectors are a common lightning protection measure for high-speed railway contact networks. However, considering that surge protection device have the best lightning protection effect compared to lightning conductors, parallel gaps and other commonly used lightning protection measures for high-speed railways, but the cost is high and the later maintenance is difficult, how should we solve these problems?

There are many remote mountainous areas in my country's high-speed railways and many elevated sections, making it inconvenient to install and maintain surge protective device, not to mention that there are obvious climate differences between the north and the south. Therefore, it is best to use relatively light, well-sealed and durable high-speed railway surge protectors. Generally, the varistor chip of this surge protector adopts silicone sealing technology, which is resistant to moisture and heat, suitable for various complex environments, and prolongs its service life. The release mechanism is a large-area fan-shaped arc-extinguishing baffle with a creepage distance of up to 12mm and strong arc-extinguishing ability, so it can be used in high-altitude areas. The outer shell is made of UL-certified fire-retardant material, which is lightweight, resistant to high temperatures and will not catch fire. If you encounter this kind of surge protector, you must pay attention to it. Let's get back to the topic. In theory, if a surge protector is installed on each pillar of the high-speed railway, the tripping rate caused by lightning strikes can be reduced to zero, but in fact, taking into account both cost and lightning protection effect, surge protectors should be installed in key locations such as open areas with many thunderstorms or high altitudes. my country's high-speed railways are composed of power supply substations and traction network lines. On the traction lines, most of the lines are not equipped with lightning conductors. Only some lines have high-speed railway surge protectors installed at key locations such as tunnel entrances and exits. Some lines have parallel gaps added to the viaduct pillars in areas prone to lightning.