The signal flow between the function blocks is shown in Figure 64. The application
description for all these functions can be found below. The function SCILO in the
Figure below is the logical node for interlocking.
When the circuit breaker or switch is located in a breaker IED, two more functions
are added:
• GOOSE receive for switching device GOOSEXLNRCV
• Proxy for signals from switching device via GOOSE XLNPROXY
The extension of the signal flow and the usage of the GOOSE communication are
shown in Figure
65.
IEC17000061=1=en=Orignal.ai
SXCBR
SCSWI
SCILO
SXCBR
SXCBR
-QA1
-QB1
-QB9
IEC 61850
QCBAY
IEC17000061 V1 EN-US
Figure 64: Signal flow between apparatus control function blocks when all
functions are situated within the IED
1MRK 504 169-UEN A Section 11
Control
Transformer protection RET650 2.2 IEC 177
Application manual
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