VDeadBusEnerg and VDeadLineEnerg
The threshold voltages VDeadBusEnerg and VDeadLineEnerg, have to be set to a
value greater than the value where the network is considered not to be energized. A
typical value can be 40% of the base voltages.
A disconnected line can have a considerable potential due to, for
instance, induction from a line running in parallel, or by being fed via
the extinguishing capacitors in the circuit breakers. This voltage can be
as high as 30% or more of the base line voltage.
Because the setting ranges of the threshold voltages VLiveBusEnerg/VLiveLineEnerg
and VDeadBusEnerg/VDeadLineEnerg partly overlap each other, the setting conditions
may be such that the setting of the non-energized threshold value is higher than that of
the energized threshold value. The parameters must therefore be set carefully to avoid
the setting conditions mentioned above.
VMaxEnerg
This setting is used to block the closing when the voltage on the live side is above the
set value of VMaxEnerg.
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. If the conditions do 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.
3.12.1.4 Setting parameters
Table 149: SESRSYN (25) Group settings (basic)
Name
Values (Range) Unit Step Default Description
Operation Disabled
Enabled
- - Disabled Disable/Enable Operation
CBConfig No voltage sel.
Double bus
1 1/2 bus CB
1 1/2 bus alt. CB
Tie CB
- - No voltage sel. Select CB configuration
VBaseBus 0.001 - 9999.999 kV 0.001 400.000 Base value for busbar voltage settings
VBaseLine 0.001 - 9999.999 kV 0.001 400.000 Base value for line voltage settings
Table continues on next page
1MRK504116-UUS C Section 3
IED application
599
Application manual
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