提高桥式起重机安全性的电路设计

Circuit Design of Improving Security of Bridge Cranes

目前大多数中小型桥式起重机主接触器将主钩电源排除在外 ,一旦主钩接触器触头熔焊 ,引起电路失控 ,会造成事故。本设计设置总断路器取代原设计的主接触器 ,统管包括主钩在内的所有机构电源 ,既不增加投资 ,又能提高安全性。

Most main contactors of small and medium sized bridqe cranes at present eliminate main hook power source.Once contacts of a main contactor are mtlted and welded, out of control of a circuit can cause accident.The design sets up general circuit breaker to replace the main contactor of original design,including all mechanism power source among the main hook.It improves security and does not increase investment.