Functions
6-178 7SJ62 Manual
C53000-G1140-C121-1
6.20.3 Interlocking
Figure 6-71 DIGSI
®
4 Dialogue Box for Object Properties – for Setting the Interlock-
ing Conditions.
The interlocking checks are divided into:
• System Interlocking (checked by a central control system such as SCADA or sub-
station controller), to be implemented with Version 4.2
• Zone Controlled/Bay Interlocking (checked in the device)
System interlocking relies on the system data base in the substation or central control
system. Circuit breakers (or other equipment) that require system interlocking in a
central control system (Substation Controller) must be configured in their specific com-
mands object properties box for the specific control device. Interlocking conditions can
be selected.
Zone Controlled/Bay Interlocking relies on the status of the circuit breaker and other
switches that are connected to the relay. The extent of the interlocking checks is de-
termined by the configuration of the relay.
For all commands, operation with interlocking (normal mode) or without interlocking
(test mode) can be selected:
− for Local commands, by reprogramming the settings (using the local user interface)
with password check,
− for automatic commands, via command processing by CFC,
− for local / remote commands, using an additional interlocking disable command, via
Profibus. (Other Protocols may support these feature in the future).
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