ABB RER620 Technical Manual page 134

Section 4
Protection functions
128
can choose the DT characteristic by selecting the Operating curve type values "ANSI Def.
Time" or "IEC Def. Time". The functionality is identical in both cases.
The following characteristics, which comply with the list in the IEC 61850-7-4
specification, indicate the characteristics supported by different stages:
1MAC309294-MB F
RER620
Technical Manual