GE P24DM - Independent Rate of Change of Frequency Protection; Average Rate of Change of Frequency Protection

Accuracy
Drop-off (f, underfrequency) (Setting + 20 mHz) +/- 10 mHz
Drop-off (f, overfrequency) (Setting - 20 mHz) +/- 10 mHz
Drop-off (df/dt, falling, for settings between 10 mHz/s and
100
mHz/s)
(Setting + 5 mHz/s) +/- 10 mHz/s
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 )
(Setting - 5 mHz/s) +/- 10 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 and Reset time
Instantaneous operating time (Freq AvCycles setting = 0) <125 ms
Reset time time (df/dt AvCycles setting = 0) <400 ms
5.4 INDEPENDENT RATE OF CHANGE OF FREQUENCY PROTECTION
Accuracy
Pick-up (df/dt) Setting +/- 3% or +/- 10 mHz/s, whichever is greater
Drop-off (df/dt, falling, for settings between 10 mHz/s and
100 mHz/s)
(Setting + 5 mHz/s) +/- 10 mHz/s
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)
(Setting - 5 mHz/s) +/- 10 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 +/- 2% or 50 ms, whichever is greater
Operating and Reset time
Operating time (for ramps 2 x seting or greater) <200 ms
Operating time (for ramps 1.3 x seting or greater) <300 ms
Reset time time (df/dt AvCycles setting = 0 for df/dt settings greater than
0.1 Hz/s and no intentional time delay)
<250 ms
Referecne Conditions: Tested with df/dt Average Cycles = 0 for df/dt settings greater than 0.1 Hz/s, and no
intentional time delay.
5.5 AVERAGE RATE OF CHANGE OF FREQUENCY PROTECTION
Accuracy
Pick-up (f) Setting +/- 10 mHz
Pick-up (Df/Dt) Setting +/- 100 mHz/s
Drop-off (falling) (Setting + 20 mHz) +/- 10 mHz
Drop-off (rising) (Setting - 20 mHz) +/- 10 mHz
Operating timer +/- 2% or 30 ms, whichever is greater
Chapter 21 - Technical Specifications P24xM
442 P24xM-TM-EN-2.1