Table 73. Rate-of-change of frequency protection SAPFRC
Function
Range or value
Accuracy
Operate value, start function
(-10.00-10.00) Hz/s
±10.0 mHz/s
Operate value, restore enable frequency
(45.00-65.00) Hz
±2.0 mHz
Definite restore time delay
(0.000-60.000) s
±0.2% or ±100 ms whichever is
greater
Definite time delay for frequency gradient trip
(0.200-60.000) s
±0.2% or ±120 ms whichever is
greater
Definite reset time delay
(0.000-60.000) s
±0.2% or ±250 ms whichever is
greater
1MRK 506 372-BEN -
Line distance protection REL670 2.2
Product version: 2.2
88
ABB