我铁路分局地处东南沿海,雨季时间长,因此各货场上的主要装卸设备——龙门起重机都采用架空滑触线。但经常遭台风的袭击及海洋盐雾的侵袭,故障较多。根据运行维修管理上的需要,必须对架空滑触线设置断相保护,为此,本人设计了简单易行、投资费用低、安装方便的断相保护,其电气接线图见附图。滑触线馈电控制箱安装在电源 I Railway Branch is located in the southeast coast, the rainy season for a long time, so the freight yard of the main handling equipment - gantry cranes are used overhead trolley line. However, they were often hit by typhoons and sea salt spray. According to the needs of operation and maintenance management, it is necessary to set off-phase protection for overhead trolley lines. To this end, I designed a simple phase-out protection with low investment cost and convenient installation. The electrical wiring diagram is shown in the attached drawings. Sliding line feed control box installed in the power supply