ABB Relion REQ650, Applications Manual

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group, and the bus voltage is above 80% of the bus base voltage UBase , according
to the setting GblBaseSelBus .
• DBLL , Dead Bus Live Line, the bus voltage is below 40% of the bus base voltage
UBase , according to the setting GblBaseSelBus about the Global Base Value
group, and the line voltage is above 80% of the line base voltage UBase ,
according to the setting GblBaseSelLine .
• Both , energizing can be done in both directions, DLLB or DBLL .
ManEnergDBDL
If the parameter is set to On , manual closing is enabled when line voltage is below 40%
of the line base voltage UBase , according to the setting GblBaseSelLine about the
Global Base Value group, and when bus voltage is below 40% of the bus base voltage
UBase, according to the setting
GblBaseSelBus and also ManEnerg is set to DLLB ,
DBLL or Both .
tAutoEnerg and tManEnerg
The purpose of the timer delay settings, tAutoEnerg and tManEnerg , is to ensure that
the dead side remains de-energized and that the condition is not due to a temporary
interference. Should the conditions not persist for the specified time, the delay timer
is reset and the procedure is restarted when the conditions are fulfilled again. Circuit
breaker closing is thus not permitted until the energizing condition has remained
constant throughout the set delay setting time.
10.2 Autorecloser for 3-phase operation SMBRREC
10.2.1 Identification
Function Description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Autorecloser for 3-phase operation SMBRREC
O->I
SYMBOL-L V1 EN
79
10.2.2 Application
Automatic reclosing is a well-established method for the restoration of service in a
power system after a transient line fault. The majority of line faults are flashover arcs,
which are transient by nature. When the power line is switched off by the operation of
line protection and line breakers, the arc de-ionizes and recovers its ability to
withstand voltage at a somewhat variable rate. Thus, a certain dead time with a de-
energized line is necessary. Line service can then be resumed by automatic reclosing
1MRK 505 291-UEN A
Section 10
Control
197
Application manual