Station HMI
GW
cc
Station bus
breakers disconnectors earthing switches
IEC08000227.vsd
Apparatus
Control
IED
I/O
Local
HMI
Apparatus
Control
IED
I/O
Apparatus
Control
IED
I/O
Local
HMI
Local
HMI
IEC08000227 V1 EN-US
Figure 74: Overview of the apparatus control functions
Features in the apparatus control function:
• Operation of primary apparatuses
• Select-Execute principle to give high security
• Selection and reservation function to prevent simultaneous operation
• Selection and supervision of operator place
• Command supervision
• Block/deblock of operation
• Block/deblock of updating of position indications
• Substitution of position indications
• Overriding of interlocking functions
• Overriding of synchrocheck
• Pole discordance supervision
• Operation counter
• Suppression of mid position
The apparatus control function is realized by means of a number of function blocks
designated:
• Switch controller SCSWI
• Circuit breaker SXCBR
• Circuit switch SXSWI
• Bay control QCBAY
• Bay reserve QCRSV
Section 12 1MRK 506 375-UEN A
Control
238 Railway application RER670 2.2 IEC
Application manual
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