AC Intervene Voltage Settings

[Anonymous user]

Back-UPS XS 1000

Your battery backup will  intervene  if the AC voltage goes above (selectable range) 142-136v AC

Your battery backup will  intervene  if the AC voltage goes below (selectable range) 78-88v AC

I would like my battery backup to intervene if the AC voltage goes above 127v AC or below 100v AC

Why are the setting so high and so low?

What file in the folder for PowerChute in Windows 7 holds these values so I could change them with a Hexidecimal  editor?

Thanks

[Anonymous user · Accepted solution]

Some of the reason is likely to be that of stability (hysteresis), so the unit isn't constantly "bouncing" to and from battery backup. And a lot of equipment (especially the switchmode power supplies in computers) will operate perfectly well even at those voltages.

The decision concerning when to intervene isn't made by PowerChute and in the case of your XS 1000, PowerChute is only sending a command changing the unit's sensitivity from one of three possible choices, not actual voltage set points.

I'm not sure if PowerChute takes into consideration your XS 1000's ability to regulate low line voltage without switching to battery. Since the UPS can do this continuously, PowerChute may not take it into consideration.

If you require tighter regulation of voltages, a line stabilizer having an autotransformer (sometimes also called a line conditioner) or a Smart UPS may be better options. (The Smart-UPS in particular has finer grained transfer voltage controls.)