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238
Interlocking
Specific interlocking conditions and connections between standard interlocking mod-
ules are performed by an engineering tool. The signals involved in the bay-level inter-
locking can consist of these types:
•
Positions of HV apparatuses (sometimes per phase)
•
Valid positions (if evaluated in the control module)
•
External release (to add special conditions for release)
•
Line voltage (to block operation of line earthing switch)
•
Output signals to release the HV apparatus
The interlocking module is connected to the surrounding functions within a bay as
shown in figure 119.
Interlocking
modules in
other bays
Interlocking
module
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The communication between different bays is performed via the station bus and can
consist of signals of these types:
•
Unearthed busbars
•
The busbars are connected together
•
Other bays connected to a busbar
Received data from other bays are valid. Figure 120 shows the principle of data ex-
change.
Control module
Control module
Control module
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