GE MiCOM P145 Agile - Advanced Underfrequency Protection; Supervised Rate of Change of Frequency Protection; Independent Rate of Change of Frequency Protection

5.4 ADVANCED UNDERFREQUENCY PROTECTION
Accuracy
Pick-up Setting +/- 5 mHz
Drop-off (Setting + 25 mHz) +/- 5 mHz
Operating timer +/- 2% or 50 ms, whichever is greater
Operating and Reset time
Operating time (Fs/Ff ratio less than 2) <125 ms
Operating time (Fs/Ff ratio between 2 and 6) <160 ms
Operating time (Fs/Ff ratio greater than 6) <230 ms
Reset time <200 ms
Reference conditions: Tested using step changed in frequency with Freq. Av Cycles setting = 0 and no intentional
time delay.
Fs = start fr
equency – frequency setting
Ff = frequency setting – end frequency
5.5 SUPERVISED RATE OF CHANGE OF FREQUENCY PROTECTION
Accuracy
Pick-up (f) Setting +/- 10 mHz
Pick-up (df/dt) Setting +/- 3% or +/- 10 mHz/s, whichever is greater
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
Dr
op-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
5.6 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
Chapter 23 - Technical Specifications P14x
544 P14xEd1-TM-EN-1