When I have a power failure, PowerAlert shuts down my operating system but not my UPS. Why?
If your UPS is a contact closure UPS (BC Pro, OmniPro, OmniSmart, and Internet Office models are all contact closure UPSs), your UPS will shut off at the time specified in Event Manager after a power failure event only if you are using PowerAlert on the Windows NT platform. NOTE: Your contact closure UPS will always shut off two minutes after the UPS reaches the low battery condition, regardless of your operating system.