西山煤电集团公司西曲矿，自１９９３年初起井下采区变电所 经常出现北翼变电所跳闸以后引起南翼变电所总柜误跳闸，以及南北翼线路发生故障使最前一级变电所总柜跳闸（即越过二、三级跳闸）。每年雨季误跳闸更为严重（每月５～６次，甚至一个夜班７～８次），导致南翼或北翼及 Xishan Coal and Electricity Group Corporation Xiqu mine, since the beginning of 1993 underground mine substations often appear after the North Substation trip caused by the South Wing substation mistaken trip, and the North-South wing line failure so that the first level of change Electricity cabinet trip (ie crossed the second and third trip). The annual tripping of the rainy season is more serious (5-6 times a month or even 7-8 times a night shift), leading to the south or north wing and