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北京西客站供热厂的冷凝水回收站,安装了三套45kW水泵机组,配1台富士FRN45P9S—4CX变频器,泵组采用一用两备、由转换开关切换的选泵方式。FWD与COM通、断由中间继电器的辅助接点控制。 现象:2001年4月的一天,正在运行的1＃回水泵突然停运,变频器LCD显示“变频器过载”。 初步分析:可能有以下几种原因:水泵故障、电动机故障、变频器故障或控制回路故障。 处理过程:首先检查1＃水泵和1＃电动机的机械情况,用手慢慢盘动水泵和电动机之间的联轴器,水泵和电动机转动灵活,没有卡阻现象,基本可以断定水泵和电动机没有故障。 第二步,用变频器起动1＃泵组,按起动按钮SB1,中间继电器KA带电,FWD与COM接点接通,变频器输出,
Beijing West Railway Station heating plant condensate water recycling station installed three sets of 45kW water pump units, with a Fuji FRN45P9S-4CX inverter, pump with one with two equipment, by the switch to switch the election pump. FWD and COM on, off by the intermediate relay auxiliary contact control. Phenomenon: On the day of April 2001, the running # 1 backwater pump suddenly stopped working and the inverter LCD showed “Inverter Overload”. Preliminary Analysis: There may be several reasons: pump failure, motor failure, inverter failure or control loop failure. Process: First check the 1 # pump and 1 # motor mechanical conditions, hand slowly pan between the pump and the motor coupling, pump and motor rotation flexible, there is no jamming, the basic can determine the pump and motor is not malfunction. The second step, start with the inverter 1 # pump group, press the start button SB1, intermediate relay KA live, FWD and COM contacts connected, the inverter output,