ABB Relion 620 Series - Residual Current Measurement RESCMMXU

8.1.6.6 Technical data
Table 911: VAMMXU Technical data
Characteristic Value
Operation accuracy
Depending on the frequency of the voltage measured: f
n
±2
Hz
At voltages in range 0.01…1.15 × U
n
±0.5 % or ±0.002 × U
n
Suppression of harmonics
DFT: -50 dB at f = n × f
n
, where n = 2, 3, 4, 5,…
RMS: No suppression
8.1.7 Residual current measurement RESCMMXU
8.1.7.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE
C37.2 device
number
Residual current measurement RESCMMXU Io In
8.1.7.2 Function block
Figure 504: Function block
8.1.7.3 Signals
Table 912: RESCMMXU Input signals
Name Type Default Description
Io SIGNAL 0 Residual current
BLOCK BOOLEAN 0=False Block signal for all bi-
nary outputs
Table 913: RESCMMXU Output signals
Name Type Description
HIGH_ALARM BOOLEAN High alarm
HIGH_WARN BOOLEAN High warning
8.1.7.4 Settings
Measurement functions
1MRS757644 H
946 620 series
Technical Manual