Average Rate Of Change Of Frequency Protection; Load Restoration - GE MiCOM P40 Agile Technical Manual

P14x
Drop-off (df/dt, falling, for settings greater than 100 mHz/s) (Setting + 50 mHz/s) +/- 5% or +/- 55 mHz/s, whichever is greater
Drop-off (df/dt, rising, for settings between 10 mHz/s and
100 mHz/s)
Drop-off (df/dt, rising, for settings greater than 100 mHz/s) (Setting - 50 mHz/s) +/- 5% or +/- 55 mHz/s, whichever is greater
Operating timer
Operating time (for ramps 2 x seting or greater)
Operating time (for ramps 1.3 x seting or greater)
Reset time time (df/dt AvCycles setting = 0 for df/dt settings greater than
0.1 Hz/s and no intentional time delay)
Referecne Conditions: Tested with df/dt Average Cycles = 0 for df/dt settings greater than 0.1 Hz/s, and no
intentional time delay.
5.7

AVERAGE RATE OF CHANGE OF FREQUENCY PROTECTION

Pick-up (f)
Pick-up (Df/Dt)
Drop-off (falling)
Drop-off (rising)
Operating timer
Operating time (Freq. Av Cycles setting = 0)
Reference conditions: To maintain accuracy, the minimum time delay setting should be:
Dt> 0.375 x Df + 0.23 (f0r Df setting <1 Hz)
Dt> 0.156 x Df + 0.47 (for Df setting >= 1 Hz)
5.8

LOAD RESTORATION

Pick-up
Drop-off
Restoration timer
Holding timer
P14xEd1-TM-EN-1
Accuracy
(Setting - 5 mHz/s) +/- 10 mHz/s
+/- 2% or 50 ms, whichever is greater
Operating and Reset time
Accuracy
Setting +/- 10 mHz
Setting +/- 100 mHz/s
(Setting + 20 mHz) +/- 10 mHz
(Setting - 20 mHz) +/- 10 mHz
+/- 2% or 30 ms, whichever is greater
Operating time
<125 ms
Setting +/- 2.5%
0.95% x Setting +/- 2.5%
+/- 2% or 50 ms, whichever is greater
+/- 2% or 50 ms, whichever is greater
Chapter 23 - Technical Specifications
<200 ms
<300 ms
<250 ms
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