用户经常见到一些UPS设备具备的指标及功能,而哪些实际上是对用户有用的呢?以下就一些常见的功能或指标做简单分析,并以台达HIFT UPS为例进行说明。1缺相时使用(1)UPS输入的三相电一般是平均分配电流的,在额定功率下,缺相后,仍然正常工作,剩余相电流就会相应增加。这样,会导致剩余的相线发热,甚至燃烧,或者开关因过流而跳闸等严重情况发生。(2)为了防止以上情况的发生,有些厂家会在缺相情况下,让UPS降额使用。但此时在额定负载下,由于降额的原 Users often see some of the UPS equipment has the indicators and features, and which are actually useful to users? Here are some common features or indicators to do a simple analysis, and the Delta HIFT UPS as an example to illustrate. 1 phase loss (1) UPS input three-phase power is generally evenly distributed current, at rated power, lack of phase, still working, the remaining phase current will be increased accordingly. This will cause the remaining phase of the line fever, or even burning, or switching due to overcurrent trip and other serious situations. (2) In order to prevent the occurrence of the above situation, some manufacturers will derate the UPS in case of lack of phase. But at this time under rated load, due to the derating of the original