ABB RELION REX640 Technical Manual page 1163

1MRS759142 F
The function contains a blocking functionality which can be used to block the
function outputs.
5.2.4 Analog channel configuration
CCBRBRF has two analog group inputs which must be properly configured.
Table 1112: Analog inputs
Input
I3P
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.
5.2.5 Operation principle
The function can be enabled and disabled with the
corresponding parameter values are "On" and "Off".
The operation of CCBRBRF can be described using a module diagram. All the
modules in the diagram are explained in the next sections. Also further information
on the retrip and backup trip logics is given in sub-module diagrams.
1
Can be connected to GRPOFF if
is not set to "Current check".
REX640
Technical Manual
1
1
See the preprocessing function blocks in this document for the possible
signal sources. The GRPOFF signal is available in the function block called
Protection.
CB failure mode is set to "Breaker status" and CB fail retrip mode
Description
Three-phase currents, necessary when
other than "Breaker status"
Residual current (measured or calculated), necessary when
CB failure mode is set other than "Breaker status"
Protection related functions
CB failure mode is set
Operation setting. The
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