18000045-IEC19000450-1-en.vsdx
IEC19000450 V1 EN-US
Figure 46: Principle of synchrocheck scheme
shows the principle of the synchrocheck scheme for determining the instant
when it is permissible to connect a feeder to the power system. The voltages of busbar SS2
and the line are monitored.
Where:
SS1, SS2:
busbar 1, busbar 2
VT SS1, VT SS2, VT Line:
VTs on busbar 1, busbar 2 and line
T1, T2:
Isolators on busbars 1 and 2
CB:
Circuit-breaker
uBusInput1, uBusInput2:
Voltage input channels on the busbar side
uLineInput:
Voltage input channel on the line side
BlckTrigBus1, BlckTrigBus2:
Inputs for blocking the synchro-BlSyncLine check function by the VT fuse
failure equipment
uBus1Activ, uBus2Activ:
Binary inputs for switching between the analogue busbar voltage inputs in
accordance with the configuration of the isolators (mimic busbar)
5.7.6.2
Parameters to be set
GUID-658DA938-FF60-44EA-BB99-96C62BC6136C v1
Max. voltage difference |dU|
maxVoltDif
Max. phase-shift |dPh|
maxPhaseDif
Max. frequency difference |df|
maxFreqDif
Minimum voltage level for monitoring(determination of whether plant is
energized)
minVoltage
Table continues on next page
Section 5
1MRK 505 406-UEN B
Bay protection functions
122
Bay protection functions REB500
Technical manual
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