Performance Of Frequency Protection Functions; Basic Overfrequency Protection; Basic Underfrequency Protection; Advanced Overfrequency Protection - GE MiCOM P40 Agile Technical Manual

P14x
5

PERFORMANCE OF FREQUENCY PROTECTION FUNCTIONS

5.1

BASIC OVERFREQUENCY PROTECTION

Pick-up
Drop-off
DT operate*
Note:
*The operating time also includes the time to track the frequency at 20 Hz per second
5.2

BASIC UNDERFREQUENCY PROTECTION

Pick-up
Drop-off
DT operate*
Note:
*The operating time also includes the time to track the frequency at 20 Hz per second
5.3

ADVANCED OVERFREQUENCY PROTECTION

Pick-up
Drop-off
Operating timer
Operating time (Fs/Ff ratio less than 2)
Operating time (Fs/Ff ratio between 2 and 30)
Operating time (Fs/Ff ratio greater than 30)
Reset time
Reference conditions: Tested using step changed in frequency with Freq. Av Cycles setting = 0 and no intentional
time delay.
Fs = start frequency – frequency setting
Ff = frequency setting – end frequency
P14xEd1-TM-EN-1
Setting +/- 5 mHz
(Setting - 25 mHz) +/- 5mHz
+/- 2% or 50 ms, whichever is greater
Setting +/- 5 mHz
(Setting + 25 mHz) +/- 5mHz
+/- 2% or 50 ms, whichever is greater
Accuracy
Setting +/- 5 mHz
(Setting - 25 mHz) +/- 5 mHz
+/- 2% or 50 ms, whichever is greater
Operating and Reset time
<125 ms
<150 ms
<200 ms
<200 ms
Chapter 23 - Technical Specifications
543