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兰州铁路局打武段电气化线路在1992年10月2日发生了一次弓网故障,造成牵引变压器短路过负荷18min。针对这次短路事故,在理论上做了短路计算、主变压器线圈过电流倍数、短路负荷下的LJ—185铝绞线温升计算和主变压器绕组最热点温度计算等校核,在此基础上作了现场检查试验和恢复运行检验,结果很好。最后提出两点值得作进一步深入探讨的问题,以确保变压器安全运行管理。
Lanzhou Railway Bureau Dabu segment electrification line in October 2, 1992 a bow network failure, resulting in traction transformer short-circuit overload 18min. In view of the short circuit accident, in theory, made a short circuit calculation, the main transformer coil overcurrent ratio, short circuit load LJ-185 aluminum wire temperature calculation and calculation of the main transformer winding hottest temperature calculation and other checks, based on this Made a site inspection test and recovery operation test, the result is very good. Finally, two points worth to be discussed further in order to ensure the safe operation of the transformer management.