The IEDs may be provided with a function to receive commands either from a
substation automation system or from the local HMI. That receiving function block
has outputs that can be used, for example, to control high voltage apparatuses in
switchyards. For local control functions, the local HMI can also be used. Together
with the configuration logic circuits, the user can govern pulses or steady output
signals for control purposes within the IED or via binary outputs.
Figure
87 shows an application example of how the user can connect
SINGLECMD via configuration logic circuit to control a high-voltage apparatus.
This type of command control is normally carried out by sending a pulse to the
binary outputs of the IED. Figure 87 shows a close operation. An open breaker
operation is performed in a similar way but without the synchro-check condition.
Single
command
function
SINGLECMD
CMDOUTy
OUTy
Close CB1
&
User-
defined
conditions
Synchro-
check
Configuration logic circuits
en04000206.vsd
IEC04000206 V2 EN-US
Figure 87: Application example showing a logic diagram for control of a circuit
breaker via configuration logic circuits
Figure 88 and figure 89 show other ways to control functions, which require steady
On/Off signals. Here, the output is used to control built-in functions or external
devices.
1MRK 511 423-UEN A Section 8
Control
Bay control REC650 2.2 IEC 167
Application manual
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