ABB RELION REX640 Technical Manual page 1463

1MRS759142 F
8.1.8.3 Functionality
The residual current measurement function RESCMMXU provides limit value
supervision output (HIGH_ALARM, HIGH_WARN). Setting parameters
and
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
IRES
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
IRES
BLOCK
RESCMMXU Output signals
Table 1395: RESCMMXU Output signals
Name
HIGH_ALARM
HIGH_WARN
Table continues on the next page
REX640
Technical Manual
Off delay time are used for controlling the activation and, respectively, the
See the preprocessing function blocks in this document for the possible
signal sources.
Type
SIGNAL
BOOLEAN
Description
Residual current (measured or calculated)
Default
-
0=False
Type
BOOLEAN
BOOLEAN
Measurement functions
On delay time
Description
Residual current
Block signal for all bi-
nary outputs
Description
High alarm
High warning
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