Measurement Modes - ABB RELION REX640 Technical Manual

Section 4
Protection functions
4.2.2.7
426
GUID-C00F95F5-ED8F-4038-9969-2BEFEFB2A05C V1 EN
Figure 228: Extended operation area in directional earth-fault protection

Measurement modes

The function operates on three alternative measurement modes: "RMS", "DFT" and
"Peak-to-Peak". The measurement mode is selected with the Measurement mode
setting.
Table 481: Measurement modes supported by DEFxPDEF stages
Measurement mode
RMS
DFT
Peak-to-Peak
For a detailed description of the measurement modes, see the
Measurement modes
DEFLPDEF
x
x
x
section in this manual.
1MRS759142 C
DEFHPDEF
x
x
x
REX640
Technical Manual