ABB Relion 650 Series Technical Manual page 156

Section 8
Control
150
Other operators cannot interfere with the reserved apparatus or the status of
switching devices that may affect it.
The open or closed positions of the HV apparatuses are inputs to software modules
distributed in the control IEDs. Each module contains the interlocking logic for a
bay. The interlocking logic in a module is different, depending on the bay function
and the switchyard arrangements, that is, double-breaker or 1 1/2 breaker bays have
different modules. Specific interlocking conditions and connections between
standard interlocking modules are performed with an engineering tool. Bay-level
interlocking signals can include the following kind of information:
• 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 62.
Interlocking
modules in
other bays
Interlocking
module
en04000526.vsd
IEC04000526 V1 EN-US
Figure 62: Interlocking module on bay level
Bays communicate via the station bus and can convey information regarding the
following:
• Unearthed busbars
• Busbars connected together
• Other bays connected to a busbar
• Received data from other bays is valid
Figure 63 illustrates the data exchange principle.
Apparatus control
modules
SCILO SCSWI
SXSWI
Apparatus control
modules
SCILO SCSWI SXCBR
Apparatus control
modules
SCILO SCSWI
SXSWI
1MRK 511 424-UEN B
Bay control REC650 2.2 IEC
Technical manual