4.10.5 Q load sharing failure (low voltage) on DG
This advanced blackout prevention alarm can be activated if there is both a low voltage and a
negative Q load sharing error at the GENSET controller.
Set
point
time
Delay
Limit
GENSET controllers
Configure the parameters under
Configure > Parameters > Local power management > Advanced blackout prevention > Q
load sharing failure (low voltage)
.
Table 4.33
Default parameters
Parameter
Range
Default
Low voltage limit
90 to 110 %
99 %
Set point
-100 to -0.1 %
-20 %
Delay
0 s to 1 h
3 s
Enable
Not enabled, Enabled
Not enabled
Latch
Not enabled, Enabled
Enabled
Action
Trip generator breaker
BUS TIE breaker controller
Configure the parameters under
Configure > Parameters > Local power management > Advanced blackout prevention > Q
load sharing failure (low voltage)
.
Table 4.34
Default parameters
Parameter
Range
Default
Low voltage limit
90 to 110 %
99.5 %
Set point
-100 to -0.1 %
-20 %
Delay
0 s to 1 h
2 s
Enable
Not enabled, Enabled
Not enabled
Latch
Not enabled, Enabled
Enabled
Action
Trip bus tie breaker
Inhibit
Bus tie breaker open
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