ABB RELION REX640 Technical Manual page 1453

1MRS759142 F
8.1.6 Phase voltage measurement VPHMMXU
8.1.6.1 Identification
Function description
Phase voltage measurement
8.1.6.2 Function block
Figure 808: Function block
8.1.6.3 Functionality
The phase voltage measurement function VPHMMXU provides limit value
supervision output (HIGH_ALARM, HIGH_WARN, LOW_WARN and LOW_ALARM).
Instantaneous phase voltage in volt is available for application configurations
through output U_INST_A, U_INST_B and U_INST_C. Phase voltage demand value in
volt is for connecting to Load profile recorder (LDPRLRC) through output U_DMD_A,
U_DMD_B and U_DMD_C.
8.1.6.4 Analog channel configuration
VPHMMXU has one analog group input which must be properly configured.
Table 1377: Analog inputs
Input
U3P
There are a few special conditions which must be noted with the configuration.
REX640
Technical Manual
See the preprocessing function blocks in this document for the possible
signal sources.
IEC 61850 IEC 60617
identification identification
VPHMMXU 3UL
Description
Three-phase voltage
Measurement functions
ANSI/IEEE C37.2
device number
VL
1453