(220 x 1.7 = 380; 230 x 1.7 = 400; 240 x 1.7 = 415. Where 1.7 = square root of 3)
The Symmetra 3:1 will run On-Line for inputs between 290 VAC and 480VAC. The output voltage can be set to either 220 / 230 / 240 VAC at 50 or 60 Hertz.
If any one of the phases fails, the Symmetra will still operate On-Line but will pull more current from the other 2 phases. In this case it will draw no more than 60 amps per phase . If phase A or B fails, then the PowerView will report "Bypass Out of Range". If phase C fails, there is no notification message on PowerView. You will manually have to check the PowerView and read the input voltages.
If a second phase fails, then the Symmetra will go to On Battery operation and report "Bypass Out of Range" on the PowerView. Likewise, if all 3 phases fail it will go to On Battery operation.
When Symmetra 3:1 is On Battery it will provide single phase output power. The output voltage can be set 220 / 230 / 240 VAC. The output frequency can also be set to either 50Hz or 60Hz.
Please Note: While current is evenly distributed across all three phases while Symmetra 3:1 is on-line, all current will draw from phase 1 if the UPS is in bypass unless the optional Symmetra Bypass Transformer is in use.