8.1.8.3 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.
8.1.8.4 Analog channel configuration
RESCMMXU has one analog group input which must be properly configured.
Table 1393: Analog inputs
Input Description
IRES Residual current (measured or calculated)
See the preprocessing function blocks in this document for the possible
signal sources.
Improper analog channel configuration causes a validation error if the analog
channels are not completely configured or they do not match with certain settings.
For troubleshooting, check the contents of this chapter and also the preprocessing
blocks in this document. The configuration can be written to the protection relay
once the mismatch is corrected.
8.1.8.5 Signals
RESCMMXU Input signals
Table 1394: RESCMMXU Input signals
Name Type Default Description
IRES SIGNAL - Residual current
BLOCK BOOLEAN 0=False Block signal for all bi-
nary outputs
RESCMMXU Output signals
Table 1395: RESCMMXU Output signals
Name
Type Description
HIGH_ALARM BOOLEAN High alarm
HIGH_WARN BOOLEAN High warning
Table continues on the next page
1MRS759142 F Measurement functions
REX640
Technical Manual
1463
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