ABB RELION 650 SERIES, Руководство по применению

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The phase angle difference level settings,
PhaseDiffM and PhaseDiffA, shall also be chosen
depending on conditions in the network. The phase angle setting must be chosen to allow closing
under maximum load. A typical maximum value in heavy-loaded networks can be 45 degrees
whereas in most networks the maximum occurring angle is below 25 degrees. The setting of
PhaseDiffAsetting is limited by the PhaseDiffM setting.
tSCM and tSCA
The purpose of the timer delay settings, tSCM and tSCA, is to ensure that the synchronism check
conditions remains constant and that the situation 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 synchronism check situation has remained constant throughout the set delay setting time.
Under stable conditions a longer operation time delay setting is needed, where the
tSCM setting is
used. During auto-reclosing a shorter operation time delay setting is preferable, where the
tSCA
setting is used. A typical value for the
tSCM may be 1 second and a typical value for the tSCA may
be 0.1 second.
Energizing check settings
AutoEnerg and ManEnerg
Two different settings can be used for automatic and manual closing of the circuit breaker. The
settings for each of them are:
• Disabled, the energizing function is disabled.
•
DLLB, Dead Line Live Bus: the line voltage is below 40% of the line base voltage
UBaseaccording to the setting GblBaseSelLine about the Global Base Value 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
Enabled, 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.
1MRK 505 287-UUS B Section 10
Control
Busbar protection REB650 127
Application manual
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