Figure 144 gives an overview from what places the apparatus control function receive
commands. Commands to an apparatus can be initiated from the Control Centre (CC), the
station HMI or the local HMI on the IED front.
Station HMI
GW
cc
Station bus
breakers disconnectors grounding switches
ANSI08000227.vsd
Apparatus
Control
IED
CLOSE/OPEN
Local
HMI
Apparatus
Control
IED
Apparatus
Control
IED
Local
HMI
Local
HMI
CLOSE/OPENCLOSE/OPEN
ANSI08000227 V1 EN
Figure 144: Overview of the apparatus control functions
Features in the apparatus control function:
• Operation of primary apparatuses
• Select-Execute principle to give high security
• Selection 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 synchronism check
• 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
Section 11 1MRK 506 334-UUS A
Control
336
Application manual
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