5-106 F650 DIGITAL BAY CONTROLLER GEK-106310-AF
5.5 CONTROL ELEMENTS CHAPTER 5: SETPOINTS
5.5.2.3 Settings
There is only one synchrocheck element in the F650.
Settings description for element 25:
Function permission (Function): This setting allows enabling and disabling the synchrocheck element.
Voltage Level determination settings for busbar and line:
This setting group allows determining the voltage levels considered as dead and live for line and busbar voltage.
Dead Bus voltage level (Dead Bus Level): Voltage level considered as dead bus
Live Bus voltage level (Live Bus Level): Voltage level considered as live bus
Dead Line voltage level (Dead Line Level): Voltage level considered as dead line
Live Line voltage level (Live Line Level): Voltage level considered as live line
Synchrocheck settings (live bus, live line):
F650 relays verify synchronism by establishing and comparing three basic parameters: the difference in module and angle
of voltage phasors, and the frequency slip of a phasor related to the other one. synchrocheck settings include a fourth time
setting, that allows using an anticipative algorithm to issue a closing signal.
Voltage Difference (Max Volt Difference): Maximum Difference in module between the line and busbar
voltage to allow a closing in the synchrocheck element.
Angle Difference (Max Angle Difference): Maximum Difference in angle between the line and busbar
voltage to allow a closing in the synchrocheck element.
Frequency Slip (Max Freq Difference): Maximum difference in frequency (slip) between both voltage
values to be compared in the synchrocheck element.
Breaker Closing time (Time): Estimated breaker Closing time, used for establishing the Closing
order in a moment that allows the busbar and line voltages to be
in phase.
This time is considered if the relative slip is higher than 20 mHz; in this case, an anticipative algorithm is
executed to calculate the closing signal with the necessary advance for the breaker effective Closing to be
produced when voltages are in phase. The limit for the anticipative algorithm is two times the maximum
Setpoint > Control Elements > Synchrocheck
setting Description Name Default Value Step Range
Function permission Function DISABLED N/A [DISABLED – ENABLED]
Dead bus voltage level Dead Bus Level 10.00 0.01 V [0.00 : 300.00]
Live bus voltage level Live Bus Level 50.00 0.01 V [0.00 : 300.00]
Dead line voltage level Dead Line Level 10.00 0.01 V [0.00 : 300.00]
Live line voltage level Live Line Level 50.00 0.01 V [0.00 : 300.00]
Voltage Difference Max Volt Difference 10.00 0.01 V [2.00 : 300.00]
Angle Difference Max Angle Difference 10.0 0.1 Deg [2.0 : 80.0]
Frequency Slip Max Freq Difference 20 10 mHz [10 : 5000]
Breaker Closing time Time 0.50 0.01 s [0.01 : 1.00]
Dead Line – Dead Bus Function permission DL-DB Function DISABLED N/A [DISABLED – ENABLED]
Live Line – Dead Bus Function permission LL-DB Function DISABLED N/A [DISABLED – ENABLED]
Dead Line – Live Bus Function permission DL-LB Function DISABLED N/A [DISABLED – ENABLED]
Snapshot event generation Snapshot Events ENABLED N/A [DISABLED – ENABLED]
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