In today's era when intelligent electronic information is indispensable, lightning and instantaneous overvoltage of large electrical equipment invade indoor electrical equipment and network equipment more and more frequently through power supply, antenna, radio signal transceiver and other lines, causing damage to equipment and components, resulting in casualties. Even the transmitted or stored data is interfered or lost, which even leads to misoperation or temporary paralysis of electronic equipment, system stop, data transmission interruption, and damage of local area network or even wide area network. Therefore, lightning protection devices need to use temperature fuses as protective barriers. So how should the temperature fuse be elected for lightning protection products? What aspects should we consider? The following information is compiled and shared with everyone as follows.
I. current capacity: the nominal flow of the temperature fuse shall be consistent with the MAX flow of the lightning protection device.
Second, the fusing temperature: before using the temperature fuse, the lightning protection device must be tested. The working environment temperature of temperature fuse shall not exceed the holding temperature, and the service temperature of lightning arrester shall reach 80℃, with at least the nominal temperature of 115℃, the actual fusing temperature of 111 2℃ and the holding temperature generally above 80℃.
III. Rated current: The greater the rated current value of the temperature fuse, the stronger not only the ability to safely cut off current, but also the ability to resist pulse current.
4. Lead length: The lead length of the thermal fuse is also related to the voltage protection and effective use of lightning arrester. In particular, when welding, the short lead will affect the performance of the thermal fuse itself, but it should not be too long, which will affect the current capacity of the thermal fuse.
V. Impedance value: The temperature fuse itself has a certain impedance. The smaller the impedance, the higher the temperature value of the temperature fuse, which is not only aging-resistant, long in life, but also stable in thermal stability, that is, it does not act when it does not reach the fusing temperature.
Conclusion: There are many factors related to choosing the temperature fuse of lightning surge arrester. In order to ensure the feasibility, it is recommended to test several times.
