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在对施工现场建筑机械检查中，我们发现龙门架及井架物料提升机的控制线路因交流接触器产品质量不符合国家标准(主触头含银量较低)，极易造成主回路“烧死”现象，导致安全事故。鉴于上述情况，我站将龙门架及井架物料提升机的标准配电线路加以改进，从DZ15LE—63/3902漏电断路
In the construction site construction machinery inspection, we found that gantry and derrick material hoist control circuit due to the quality of AC contactor does not meet the national standard (the main contact with a lower amount of silver), can easily lead to the main circuit “burn ”Phenomenon, leading to accidents. In view of the above, I will be gantry and derrick material hoist standard distribution lines to be improved from DZ15LE-63/3902 leakage circuit