In this blog, it discusses the voltages and other parameters that you should know for selecting the right UPS.
Input/Output Voltage
The voltage input to the UPS and the voltage output from the UPS are basically the same voltage.
Input/Output Types
There are two types of input/output: [outlet] and [terminal block].
Single Phase and Three Phase
Single-phase: Power from a household outlet
Input/output of small capacity UPS is “single phase”
Three-phase: Electric power used for commercial purposes in factories, etc.
The input/output of medium- and large-capacity UPS is “three-phase”
