ABB RER620 Technical Manual page 553

1MAC309294-MB F
RER620
Technical Manual
Peak-to-peak with peak backup
The peak-to-peak with peak backup measurement principle is selected with the
Measurement mode setting using the value "P-to-P+backup". It is similar to the
peak-to-peak mode, with the exception that it has been enhanced with the peak backup. In
the peak-to-peak with peak backup mode, the function starts with two conditions: the
peak-to-peak value is above the set pickup current or the peak value is above two times the
set Pickup value. The peak backup is enabled only when the function is used in the DT
mode in high and instantaneous stages for faster operation.
General function block features
Section 10
547