05 April 2023
The Flair 21D is self-powered by the CT's with current > 3A and detects the network Presence and does the self-calibration based on the CT Current.
In the Auto default setting
1. Zero sequence threshold = automatic fault detection for any fault > 20 A
2. Imax threshold = automatic fault detection for any fault > 200 A
To change from Auto to manual you have to change the DIP switch setting in the Flair 21D