Posted: 2021-02-0210:42 PM. Last Modified: 2022-01-1005:10 AM
Unbalanced load correction through Symmetra PX UPS.
What is the expected correction through a Symmetra PX UPS for an extreme unbalanced load seen downstream of the UPS.
As an example using a 250kW Symmetra PX equipped with 225kW of power modules it was noted that imbalance of 0%, 0%, 25% (A,B,C phases) saw correction occur only on the A and C phase upstream of the UPS. Similar results were recorded for 50%,50%,100% (A,B,C phases).
When one phase is loaded considerably heavier, is it expected that the correction through the UPS (double conversion) would be shared mostly between 2 phases and not corrected equally across 3 phases?
Sorry for any delay in responding to your post but if this is specifically a UPS question, this forum is not the best place to look for help. If you need immediate help with a 3 phase UPS, I always suggest contacting your local support directly. If you still want forum help, I suggest using the
If the UPS itself is not seeing an issue or if the question is more about how DCE, DCO, ITE, or ITA are seeing this asset, then please be more specific about how we can assist with those softwares as this forum is more specific to those products. Also, if it is specific to the monitoring software, please make sure you indicate how the UPS would appear to be working OK but how the software would appear to be working improperly.