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平武500KV输电线路上的姚孟升压站采用高架式单分裂铝合金管母线型式,站内所用电力金具系法国SIMEL工厂制造。安装过程中,发现有的管母线支持金具(见图1)压盖,在螺栓未达到制造厂规定的扭力矩5.5kg-m时,突然断裂(见图2)。压盖所用材料:法标AS7Gy33,相当于美标USA(AA)356T6,受河南省电建一处委托,进行压盖断裂原因分析。我们先后对三只压盖进行受力即拧紧M14螺栓试验,~#1试件在3.5kg-m扭力矩时断裂;~#2试件在4.7kg-m时断裂;~#3试件扭力矩达9kg-m未断。
Yaowen 500KV transmission line Yaomeng step-up station with overhead single-split aluminum alloy tube bus type, the station uses the power fittings France SIMEL factory manufacturing. During installation, it was found that some of the busbars support fittings (see Figure 1). When the bolts did not reach the torque of 5.5 kg-m specified by the manufacturer, they suddenly broke (Figure 2). Gland Materials used: French standard AS7Gy33, equivalent to the American Standard USA (AA) 356T6, entrusted by Henan Power Construction, gland breakage analysis. We have carried out the three gland that is tightened M14 bolt test, ~ # 1 specimen rupture at 3.5kg-m torque; # 2 specimen ruptured at 4.7kg-m; # 3 specimen torque Reach up to 9kg-m.