Critical Events Occurring on a Redundant-UPS Configuration

Critical Events in a Redundant-UPS Configuration

This topic does not apply to Advanced Configuration with Advanced UPS Setups. For more information about Critical Events in Advanced UPS Setups, please view the “Using PowerChute Network Shutdown in an Advanced Redundant Setup” Application Note here.

PowerChute Network Shutdown considers all UPS devices in a Redundant configuration as one UPS System. Each UPS must be able to support the entire load itself.

PowerChute follows these shutdown rules when it detects critical events:

2 identical critical events (such as Low-Battery Condition Occurred OR UPS turn off has been initiated) occurring in succession on 2 UPS devices cause a shutdown. The shutdown is immediate and no configured delay is counted down.

2 identical user-configured critical events such as UPS On Battery occurring in succession on 2 UPS devices will cause a shutdown. Any configured delay is counted down first.
2 different critical events (such as Low-Battery Condition Occurred and PowerChute cannot communicate with the Management Card ) occurring in succession on 2 UPS devices cause the event called Multiple Critical Events occurred which always leads to a shutdown. Prior to the PowerChute shutdown process starting, a 10-second delay is counted. No configured delay time is counted down.