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一、故障现象:无论有无市电(22OV),打开UPS开关,BYPASS灯亮,而当INVERT灯一亮,机器马上进入停机状态.从故障现象看,机器一开机后未进入工作状态,而进入了保护状态.不象是主回路故障,很有可能是控制部分有故障.打开机箱,检查所有保险完好,电源电压(60V)正常.从外观看无任何异常.在断电情况下,先检查容易出故障元件,当测到TX101变压器时,发现次级有一绕组不通.拆下该变压器后测量证实确有—绕组开路.在烘箱内12℃下烘烤1小时,拆出矽钢片,打开绕组,发现这一组线根部断裂,如图1所示.仔细焊好并注意好绝缘后,按原来
First, the fault phenomenon: with or without electricity (22OV), turn on the UPS switch, BYPASS light, and when INVERT lights, the machine immediately into the shutdown state from the failure phenomenon, the machine did not enter a working state after the boot, and enter The protection of the state. Not like the main loop fault, most likely the control part is faulty. Open the chassis, check all the insurance intact, the power supply voltage (60V) normal. No abnormalities from the appearance. In the case of power failure, first check Prone to failure of components, when measured TX101 transformer, the secondary winding found to be unreasonable. Remove the transformer after the measurement confirmed that there - winding open in the oven at 12 ℃ for 1 hour, remove the silicon steel sheet, open Winding and found that this group of roots rupture, shown in Figure 1. Carefully welded and pay attention to good insulation, according to the original