Interaction with other Functionality

Protection Sequences and Lockouts

The lockout flag on the tripped ACO device is cleared when the ACO scheme starts. If the Manually trip Connected device On self-healing option is selected and Manual Changeover Onis not selected, any manual (non-ACO) trip request will take the tripped controller to a lockout. This lockout is cleared if the manually tripped switchgear is closed, bringing ACO back to its Running state. If Manual Changeover On is selected, manually tripping a connected supply will not take it to a lockout. If ACO is aborted or turned Off, the tripped ACO device will go to lockout regardless of the selected self-healing options.

If an Overcurrent protection sequence starts on a connected device, ACO will change its state to Not Ready/Waiting until the protection sequence is over (pickup cleared or protection trip to lockout). If the pickup is cleared, ACO will go back to its Running state. If the device trips to lockout, ACO will either abort or go to a Not Ready/Running state depending on the Protection trip to lockout On self-healing option.

Live Load Blocking

Live Load Blocking is automatically enabled when ACO is enabled and the selected Algorithm is either One Way or Break before Make. It is automatically disabled when ACO is enabled and the selected Algorithm is Make before Break or Both Ways.

LOP Protection

LOP Protection cannot be turned ON if ACO is ON and vice-versa, but can still be set to ALARM in this case.

Other Protection Features

ACO cannot be Available if Loop Automation, Under/Over Frequency Protection, Under/Over Voltage Protection, Directional Blocking and Directional Protection are Available and vice-versa.