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| Surge Protective Device Himel HDY3-40 3P1N 385V 40KA |
浪涌保护器（Surge protector 或 Surge protection device），也称电涌保护器 或 突波保护器，是电子设备对雷电或突波防护中不可缺少的一种装置。突波保护器的作用是利用气体放电管或压敏电阻等的元件，把串入电力或信号传输线的暂态过电压如强大的雷电或突波流泄流大地，将设备或系统电压范围限制所能承受的范围内，使被保护的设备或系统不受电压突波的电力冲击而损坏。
An indispensable device in the lightning protection of electronic equipment, the surge protector is used to restrict the transient overvoltage of the electric power line and signal transmission line to the range of voltage that the equipment or system can withstand, or discharge the powerful lightning current into the ground to protect the protected equipment or system from impact and damage.
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