煤矿井下局部通风系统中的风电闭锁装置,多数是采用QC83- 80型起动器作风电闭锁开关。随着巷道开拓延伸,设备大量增加,用电量增大,开关的容量明显不能满足供电要求。如果更换大容量的起动器作风电闭锁开关,需要投入大量的资金,且费工费时。本文介绍一种改装馈电开关的方法,改装 Wind power locking device in the local ventilation system of coal mine mostly adopts QC83- 80 starter as wind power lock switch. With the extension of the roadway, a large number of equipment, power consumption increases, the switch capacity obviously can not meet the power requirements. If you replace the high-capacity starter wind power lock switch, need to invest a lot of money, and time-consuming work. This article describes a method of modifying the feed switch, modification