摘要
从一例电梯事故入手，介绍了电梯控制电路在出现电气故障时失效的危害性；分析了目前大部分电梯存在的控制变压器次级未接地、控制线路接地型式错误等设计造成的隐患-门锁安全回路失效，最后对当前较新型号的电梯中PLC输入线路存在的接地隐患进行了探讨。
Taking an accident of the elevator as an example, this paper introduces the safety risk of the electrical faults of the control circuit, analyzes the one reason of the doorlock safety chain failure caused by the secondary of the control transformer fail to earth or the incorrect earthing of the control circuit, and also discusses the earthing hidden defect of the current PLC input circuit.
出处
《中国电梯》
2011年第1期66-68,71,共4页
China Elevator
关键词
电梯
控制线路
接地
电气故障
Elevator
Control Circuit
Earthing
EJectric Fault
