Eaton EDR-5000 - Page 794

EDR-5000 IM02602007E
Configuration of the Load Shedding
Call up menu [Protection Para\Set[x]\UFLS]
Within menu [Protection Para\Set[x]\UFLS] you can define variant respectively the active power area that will not lead to
a load shedding (load shedding blocked) in case of under frequency.
The active power flow direction can be determined by three different variants. Please select the UFLS method:
• 1
st
variant: Power Angle Supervision (please see section Method 1)
• 2
nd
variant: Pure Active Power Supervision (please see section Method 2)
• 3
rd
variant: External (please see section Method 4)
Method 1: Power Angle Supervision
A load shedding during under frequency will be blocked, if the active power is within the area limited by the power
angle.
The diagram above is in compliance with FNN
5
. This diagram shows the
blocking area within the generator arrow flow system.
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0.5
0.5
Syst VAr 1
Syst VA
Syst W 1
Syst VA
I1 min QV
.
Phi-Power
UFLS-Method = Power Angle Supervision
No Trip
Phi-Power