铁路信号分线盘（柜）处于雷电防护区的LPZ0区与 LPZ1区的交界面，对室外的信号电缆线在分线盘处就近安装浪涌保护器进行雷电防护是最佳的防护位置。

GFL1型防雷分线柜是集分线和防雷为一体，既具有分线盘功能，又具有防雷功能。防雷分线柜可替代原分线盘，用于铁路信号机械室对信号电缆线的分配、转接及雷电防护。

At the junction of LPZ0 area and LPZ1 area, the railway signal distributor (cabinet) is located in the lightning protection zone. It is the best protection position for the outdoor signal cable to install surge protector nearby at the lightning protection zone.

GFL1 lightning protection line cabinet is a combination of the line and lightning protection, with both the line disc function and lightning protection function. The lightning proof dividing line cabinet can replace the original dividing line disk, and is used for distributing, transferring and protecting the signal cable in the railway signal machine room.