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一台500W 和一台1kW“冠军牌”UPS,使用约半年后均出现如下故障:打开后长报警或市电加不上。拆开检查,未发现元器件损坏,而使用时故障依旧。经分析认为电源开关有问题,因为当出现故障时,用手用力抵开关即恢复正常,放手后又不正常,经多次开关有时可正常使用。拆开 UPS,发现其开关动静触点接触面积极小而且又在边缘(里缘),因长期使用,打火出现焦点而接触不良。处理方法:清除焦点,为增大触点的接触面积,用钳子稍扭弯原动片(向有触点的一面),重新装入即可排除故障。
A 500W and a 1kW “champion ” UPS, the use of about six months after the emergence of the following failures: open long alarm or mains do not increase. Disassembled inspection, did not find the components damaged, while using the fault still. After the analysis that there is a problem with the power switch, because when a fault occurs, the hand to force the switch to return to normal, let go and then not normal, after several times the switch can be used normally. Disassemble the UPS and found that the contact area of the switch is very small, and the edge (the edge), because of long-term use, sparking focus and poor contact. Approach: Clear the focus, in order to increase the contact area of the contact, with a slight twisting forceps pliers pieces (to the contact side), re-load to troubleshoot.