桥式起重机俗称天车或行车。在其出厂时,大多是将天车上的电器控制屏的正面安装在朝向大车走行方向的位置上,称正面安装。只有少数是将控制屏的侧面安装在顺着大车走行方向的位置上,称侧面安装。通过实践证明,前者的故障次数多,触头烧损重,线圈易损坏,方向接触器的机械连锁装置容易磨损失灵,有时还会引起弧光短路。而后者的故障次数就较 Bridge crane commonly known as crane or driving. At the factory, most of the sky is the electrical control panel installed on the front facing the direction of the cart walking position, said the positive installation. Only a few will be installed on the side of the control screen along the direction of the cart walking position, said the side installation. The practice proves that the former has many failures, the contact burns heavily, the coil is easily damaged, the mechanical interlocking device of the direction contactor is easy to wear out and sometimes the arc short circuit can also be caused. The latter the number of failures on the more