Glossary - Siemens SIPROTEC 5 Manual

Glossary

ACD
IEC 61850 data type: Directional protection activation information
ACT
IEC 61850 data type: Protection activation information
Back-up battery
The back-up battery ensures that specified data areas, flags, times and counters are kept retentive.
BCR
IEC 61850 data type: Binary counter reading
CB
Circuit breaker
Chatter blocking
A rapidly intermittent input (for example, owing to a relay contact fault) is disconnected after a parameteriz-
able monitoring time and therefore cannot generate any more signal changes. The function prevents the
system from overloading in the event of an error.
Combination matrix
In an inter-device communication (IDC) group, up to 16 SIPROTEC devices suitable for this can communicate
with one another. The combination matrix specifies which devices exchange which information.
Common format for Transient Data Exchange
Fault record format - COMTRADE
COMTRADE
See the Common Format for Transient Data Exchange
Container
If an object contains other objects, this is referred to as a container. The object Folder for example is such a
container.
Continuous Function Chart (CFC)
The Continuous Function Chart (CFC) is a programming language. It is used for programmable logic control-
lers. The programming language Continuous Function Chart is not defined in the standard IEC 61131-3, but
represents a current extension of IEC programming environments. CFC is a graphic programming language.
Function blocks are linked to one another. This represents an essential difference from conventional program-
ming languages, where sequences of commands are entered.
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