Interlocking - ABB Relion 650 Series Technical Manual

1MRK 511 424-UEN B
8.2
8.2.1
8.2.2
Bay control REC650 2.2 IEC
Technical manual
Function
Maximum voltage for
energizing
Time delay for energizing
check when voltage jumps
from 0 to 90% of Urated
Operate time for
synchrocheck function when
angle difference between
bus and line jumps from
"PhaseDiff" + 2 degrees to
"PhaseDiff" - 2 degrees
Operate time for energizing
function when voltage jumps
from 0 to 90% of Urated

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 circuit configuration and status of the
system at any given time.
Operation principle
The interlocking function consists of software modules located in each control
IED. The function is distributed and not dependent on any central function.
Communication between modules in different bays is performed via the station
bus.
The reservation function (see section "Functionality") is used to ensure that HV
apparatuses that might affect the interlock are blocked during the time gap, which
arises between position updates. This can be done by means of the communication
system, reserving all HV apparatuses that might influence the interlocking
condition of the intended operation. The reservation is maintained until the
operation is performed.
After the selection and reservation of an apparatus, the function has complete data
on the status of all apparatuses in the switchyard that are affected by the selection.
Range or value
(50.0-180.0)% of UBase
(0.000-60.000) s
Min. = 15 ms
Max. = 30 ms
Min. = 70 ms
Max. = 90 ms
Section 8
Control
Accuracy
±0.5% of U at U ≤ U
r r
±0.5% of U at U > U
r
±0.2% or ±100 ms whichever is
greater
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IP15572-1 v2
M15106-3 v7
M13528-4 v7
149