Technical Data - ABB RELION REX640 Technical Manual

Section 8
Measurement functions
8.1.6.8
8.1.7
8.1.7.1
8.1.7.2
8.1.7.3
8.1.7.4
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Technical data

Table 1236: VAMMXU Technical data
Characteristic
Operation accuracy
Suppression of harmonics
Residual current measurement RESCMMXU
Identification
Function description
Residual current measurement
Function block
GUID-6EE5A3A2-AF8C-497B-A627-7B70AB4A708E V1 EN
Figure 706: Function block
Functionality
The residual current measurement function RESCMMXU provides limit value
supervision output (HIGH_ALARM, HIGH_WARN). Setting parameters On delay time
and Off delay time are used for controlling the activation and, respectively, the
deactivation of alarm and warning outputs.
Instantaneous residual current in amperes is available for application configurations
through output I_INST_RES. The residual current demand value in amperes is for
connecting to Load profile recorder (LDPRLRC) through output I_DMD_RES.
Analog channel configuration
RESCMMXU has one analog group input which must be properly configured.
Value
Depending on the frequency of the voltage
measured: f ±2 Hz
n
At voltages in range 0.01...1.15 × U
±0.5% or ±0.002 × U
DFT: -50 dB at f = n × f
RMS: No suppression
IEC 61850 IEC 60617
identification identification
RESCMMXU Io
1MRS759142 C
n
n
, where n = 2, 3, 4, 5,...
n
ANSI/IEEE C37.2
device number
IG
REX640
Technical Manual