LY1系列电涌保护器(以下简称SPD)适用于设备末端保护、终端配电箱及内部信息设备前端，低压交流配电系统的IT、TT、TN-C、TN-S、TN-C-S等供电系统，对间接雷电和直接雷电影响或其他瞬时过电压的电涌进行保护。依据IEC61643-1:1998-02标准的第Ⅱ级电涌保护器。

SPD具有共模(MC)和差模(MD)保护方式。

SPD符合GB18802.1/IEC61643-1。

LY1 series Surge Protection Device (hereinafterreferred to as the SPD) is applicable for end equipmentprotection, such as the terminal distribution box, internalinformation front-end equipment, and power supply systemsof IT, TT, TN-C, TN-S, TN-C-S of low-voltage ac powerdistribution systems. It protects against the surge, whichis influenced by the indirect lightning and directly thunderor other transient voltage. According to the standard ofIEC61643-1:1998-02, it belongs to class II surge protectiondevice.

The SPD has common-mode (MC) and differential mode(MD) protections.

The SPD accords with681RR02.1 /IEC61643-1.