描述
UPS电源切换检查。将热工自备UPS电源接到220V交流供电,启动由该热工自动UPS电源供电的系统,当断开UPS电源供电切至外部保安电源供电,检查系统仍正常热工自备UPS电源切换时间应小于5ms。以上切换若造成系统运行正常,则应更换该热工自备UPS电源。
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