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UPS按工作方式可分为在线式(ONLINE)和后备式(OFFLINE)两种;而按使用时间则可分为标准时间(5分钟)和长时间(以小时计)。在线式UPS输出电源为正弦波,市电中断,其输出不中断,但其价格较高。后备式UPS输出电源的波形有正弦波和方波两种。市场上常见到的准在线式UPS实际上是输出为正弦波的后备式UPS。目前普遍使用的500/600VA和1kVA UPS
UPS according to work can be divided into online (ONLINE) and standby (OFFLINE) two; according to the use of time can be divided into standard time (5 minutes) and long time (in hours). On-line UPS output power is sine wave, mains interruption, the output is not interrupted, but its higher prices. Backup UPS output power supply waveform has two kinds of sine wave and square wave. The quasi-online UPS commonly found on the market is actually a backup UPS that outputs a sine wave. Currently used 500 / 600VA and 1kVA UPS