GE Multilin G650 Manual page 224

5 SETTINGS
5.5.4.3 SETTINGS
Setpoint > Control Elements > Synchrocheck
There is only one synchrocheck element in the G650.
Table 5–81: 25 ELEMENT SETTINGS
SETPOINT > CONTROL ELEMENTS > SYNCHROCHECK
SETTING DESCRIPTION
Function permission
Dead bus voltage level
Live bus voltage level
Dead line voltage level
Live line voltage level
Voltage Difference
Angle Difference
Frequency Slip
Breaker Closing time
Dead Line – Dead Bus Function permission
Live Line – Dead Bus Function permission
Dead Line – Live Bus Function permission
Snapshot event generation
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):
Live Bus voltage level (Live Bus Level):
Dead Line voltage level (Dead Line Level):
Live Line voltage level (Live Line Level):
Synchrocheck settings (live bus, live line):
G650 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):
Angle Difference (Max Angle Difference):
Frequency Slip (Max Freq Difference):
Breaker Closing time (Time):
GEK-113285A
NAME
Function
Dead Bus Level
Live Bus Level
Dead Line Level
Live Line Level
Max Volt Difference
Max Angle Difference
Max Freq Difference
Time
DL-DB Function
LL-DB Function
DL-LB Function
Snapshot Events
Voltage level considered as dead bus
Voltage level considered as live bus
Voltage level considered as dead line
Voltage level considered as live line
Maximum Difference in module between the line and busbar
voltage to allow a closing in the synchrocheck element.
Maximum Difference in angle between the line and busbar
voltage to allow a closing in the synchrocheck element.
Maximum difference in frequency (slip) between both voltage
values to be compared in the synchrocheck element.
Estimated breaker Closing time, used for establishing the
Closing order in a moment that allows the busbar and line
voltages to be in phase.
G650 Generator Protection & Control System
5.5 CONTROL ELEMENTS
DEFAULT STEP RANGE
VALUE
DISABLED N/A [DISABLED – ENABLED]
10.00 0.01 V [0.00 : 500.00]
50.00 0.01 V [0.00 : 500.00]
10.00 0.01 V [0.00 : 500.00]
50.00 0.01 V [0.00 : 500.00]
10.00 0.01 V [2.00 : 500.00]
10.0 0.1 Deg [2.0 : 80.0]
20 10 mHz [10 : 5000]
0.50 0.01 s [0.01 : 600.00]
DISABLED N/A [DISABLED – ENABLED]
DISABLED N/A [DISABLED – ENABLED]
DISABLED N/A [DISABLED – ENABLED]
ENABLED N/A [DISABLED – ENABLED]
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