Operation Principle - ABB Relion 650 Series Technical Manual

Section 8
Control
8.3.9.5
8.3.9.6
8.3.9.7
244
The default values of the inputs BEH, OPCNT, EEHEALTH and
OPCAP are set to -1 to denote that they are not connected.

Operation principle

The proxy for signals from switching device via GOOSE (XLNPROXY) is
intended to be used when the switch (XCBR/XSWI) is modelled and controlled in
a breaker IED or similar unit on the process bus. XLNPROXY packages the signals
from the GOOSE receive function, normally GOOSEXLNRCV, into the same
format as used from SXCBR and SXSWI to SCSWI. It makes a similar evaluation
of the command response as SXCBR and SXSWI when a command is issued from
the connected SCSWI.
Position supervision
XLNPROXY has two outputs for position indication: OPENPOS and CLOSEPOS.
Position is a double point indication and the OPENPOS and CLOSEPOS are binary
outputs intended to be used for condition logics to protection and control functions
Normally, the position outputs, OPENPOS and CLOSEPOS, follow the value of
the input POSVAL. However, if the POSVAL_V input is FALSE, the
communication is lost (COMMVALID = FALSE), or the quality of the position
received is bad, the OPENPOS and CLOSEPOS are both set to FALSE.
Command response evaluation
The command evaluation is triggered through the group input XIN that is
connected to the SCSWI function controlling the switch.
If an operation is initiated by the SCSWI, the XLNPROXY function checks if the
switch is blocked for the operation direction and that the position moves to the
desired position within the two time limits tStartMove and tIntermediate. The
default values for tStartMove and tIntermediate are for a breaker. The typical
values for a disconnector are:
• tStartMove = 3s
• tIntermediate = 15s
In most cases, tStartMove and tIntermediate can be set to the same
values as in the source XCBR or XSWI function. However, if the
time limits are set very close to the actual movement times of the
apparatus, compensation may be needed for the communication
delays and differences in cycle time of the XLNPROXY function
1MRK 511 424-UEN B
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GUID-D2679E0E-ABB5-46F0-AD9C-F6E8E8099534 v1
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Bay control REC650 2.2 IEC
Technical manual