ABB Relion 630 Series Engineering Manual page 77

1MRS756800 F
630 series
Engineering Manual
tried to perform with blocking of command connected to TRUE is as shown in
47.
IEC09000604 V1 EN
Figure 47: Message displayed when controlling any power apparatus with
BLK_CMD of QCCBAY connected to logical TRUE
Logical node for interlocking
Logical node for interlocking (SCILO) provides the information to the switching
controller GNRLCSWI whether it is permitted to operate due to the switchyard
topology. Customer need to prepare the interlocking conditions logics using OR/AND
logics and this information is given to SCILO at OPEN_EN and CLOSE_EN inputs.
Let's take an example, consider the switchyard topology as shown in
earth switch shown in the topology can be open or closed if (a) the circuit breaker is
in open position OR (b) circuit breaker is in closed position AND both the
disconnectors are in open position.
IEC09000605 V1 EN
Figure 48: Typical Power system topology
Protection and control engineering
IEC09000604-1-en.vsd
IEC09000605-1-en.vsd
Section 5
Figure
Figure 48, the
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