Deif PPM 300 - Q Load Sharing Failure (Low Voltage) on DG

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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