“吊篮上升”防超高控制电路周培勇（上海第一建筑公司）看了前几期《建筑安全》杂志，在电气安全栏目里，井字架升降机，吊篮上升极限位置控制的讨论特别多，也很热烈，许多人介绍了各自的方法和技术。主要看来有两大类，即采用机械装置和采用电器装置来达到防超高的目的... “Pendant rising” anti-super-high control circuit Zhou Peiyong (Shanghai First Construction Company) saw the previous issue of “Building Safety” magazine, in the electrical safety section, Tic-Tac-Lifts, hanging basket limit extreme position control discussed particularly , Also very warm, many people introduced their own methods and techniques. There are mainly two main categories, that is, the use of mechanical devices and the use of electrical devices to achieve the purpose of preventing ultra-high ...