GE P645

6 PERFORMANCE OF FREQUENCY PROTECTION FUNCTIONS
6.1 OVERFREQUENCY PROTECTION
Pick-up Setting +/- 10 mHz
Drop-off Setting -25 mHz +/- 10 mHz
DT operate
+/- 2% or 70 ms, whichever is greater (excluding frequency
tracking time delay)
Repeatability < 1%
6.2 UNDERFREQUENCY PROTECTION
Pick-up Setting +/- 10 mHz
Drop-off Setting +25 mHz +/- 10 mHz
DT Operate
+/- 2% or 70 ms, whichever is greater (excluding frequency
track
ing time delay)
Repeatability < 1%
6.3 OVERFLUXING PROTECTION
Pick-up Setting +/- 5%
Drop-off Setting -2% +/- 5%
Repeatability (operating threshold) < 1%
IDMT operate +/- 5% or 50 ms, whichever is greater
DT operate +/- 2% or 50 ms, whichever is greater
Instantaneous operation < 50 ms
Disengagement time < 50 ms
Repeatability (operating times) < 10 ms
V / Hz measurement +/- 1%
Reset time +/- 2% or 50 ms, whichever is greater
P64x Chapter 21 - Technical Specifications
P64x-TM-EN-1.3 465