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Posted: 2023-06-04 12:35 PM
Hi all,
We have various models of APC UPSes deployed at one of our sites and I'm seeing an interesting difference in the performance of the Automatic Voltage Regulation functionality between different line-interactive UPS models.
Last night - due to an increase in voltage from the utility, we had multiple UPSes kick into AVR mode (Event message: "UPS: Compensating for a high input voltage.").
While in this state:
Looking at the event logs on the UPSes, it doesn't look like either of them kicked over to battery so I'm assuming the AVR feature is trimming the voltage.
Question: both of these UPSes list AVR as a feature but the performance is significantly different. Is there a way to tell from spec sheets, etc. what level of AVR exists on any given UPS model?
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Posted: 2024-01-11 01:41 PM
Generally speaking, the AVR is defined by upper and lower voltage limit defined under the Configuration -> Power Settings. The *Sensitivity* that is chosen from (Normal, Reduced, Low) will define when the UPS will transfer to battery power - I have appended a screen shot from the users manual.
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