8.1.7 Single-phase voltage measurement VAMMXU (ANSI V_A)
8.1.7.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Single-phase voltage measurement VAMMXU U_A V_A
8.1.7.2 Function block
Figure 809: Function block
8.1.7.3 Functionality
The single-phase voltage measurement function VAMMXU provides limit value
supervision output (HIGH_ALARM, HIGH_WARN, LOW_WARN, LOW_ALARM).
Instantaneous single-phase voltage in volt is available for application configurations
through output U_INST. Phase voltage demand value in volt is for connecting to
Load profile recorder (LDPRLRC) through output U_DMD.
8.1.7.4 Analog channel configuration
VAMMXU has one analog group input which must be properly configured.
Table 1385: Analog inputs
Input Description
U3P Voltage group signal
See the preprocessing function blocks in this document for the possible
signal sources.
There are a few special conditions which must be noted with the configuration.
Table 1386: Special conditions
Condition Description
U3P connected to real measurements The function requires that the first phase
voltage U_A or U_AB is connected.
Measurement functions 1MRS759142 F
1458 REX640
Technical Manual
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