Interlocking - ABB Relion Technical Manual

Section 12
Control
12.3
12.3.1
12.3.2
12.3.2.1
12.3.2.2
12.3.2.3
380

Interlocking

Functionality
The interlocking functionality blocks the possibility to operate high-voltage switching
devices, for instance when a disconnector is under load, in order to prevent material
damage and/or accidental human injury.
Each control IED has interlocking functions for different switchyard arrangements, each
handling the interlocking of one bay. The interlocking functionality in each IED is not
dependent on any central function. For the station-wide interlocking, the IEDs
communicate via the station bus or by using hard wired binary inputs/outputs.
The interlocking conditions depend on the primary bus configuration and status of any
breaker or switch at any given time.
Logical node for interlocking SCILO (3)
Identification
Function description
Logical node for interlocking
Functionality
The Logical node for interlocking SCILO(3) function is used to enable a switching
operation if the interlocking conditions permit. SCILO (3) function itself does not provide
any interlocking functionality. The interlocking conditions are generated in separate
function blocks containing the interlocking logic and provides SCILO(3) its input.
Function block
SCILO (3)
POSOPEN EN_OPEN
POSCLOSE EN_CLOSE
OPEN_EN
CLOSE_EN
ANSI09000083-1-en.vsd
ANSI09000083 V1 EN
Figure 179: SCILO (3) function block
IEC 61850 IEC 60617
identification identification
SCILO -
1MRK 502 048-UUS A
ANSI/IEEE C37.2
device number
3
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