ABB 615 Series - Measurement Modes

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