This paper analyzes a case that the inspection items of upward braking condition does not in accordance with requirements of regulation.Through the above case analysis,this paper discusses the reason why the lift can not stop running immediately and the lift control circuit board is still powered,after the lift cuts off the main power switch,which is caused by the failure of the energy feedback device for lift,from two aspects:the on-site inspection and the analysis of electrical schematic diagram.This paper further discusses the potential safety hazards of energy feedback device of lift on the safe operation of lift,according to the protection function of energy feedback device of lift,the inspection items that should be added and precautions during inspection are put forward.
维普
万方数据