Measurement Modes - ABB 615 series Technical Manual

Section 4
Protection functions
4.2.2.6
338

= 0 deg
RCA
Negative
operation
zone
Min forward angle
GUID-06B18504-D22B-44E5-AB19-3084A1D44C36 V1 EN
Figure 157: Extended operation area in directional ground-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 348: Measurement modes supported by 67/51N, 67/50N stages
Measurement mode 67/51N
RMS
DFT
Peak-to-Peak
For a detailed description of the measurement modes, see the
Measurement modes
-VG
Positive
operation
zone
IG
Max forward angle
Pickup value
67/50N
x
x
x
section in this manual.
1MAC059074-MB A
x
x
x
615 series ANSI
Technical Manual