12.3
Interlocking
12.3.1
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.
12.3.2
Logical node for interlocking SCILO (3)
12.3.2.1
Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Logical node for interlocking
SCILO
-
3
12.3.2.2
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.
12.3.2.3
Function block
ANSI09000083-1-en.vsd
SCILO (3)
POSOPEN
POSCLOSE
OPEN_EN
CLOSE_EN
EN_OPEN
EN_CLOSE
ANSI09000083 V1 EN
Figure 179:
SCILO (3) function block
Section 12
1MRK 502 048-UUS A
Control
380
Technical manual
