ABB Relion 670 Series Product Manual page 76

Line differential protection RED670 2.0
Product version: 2.0
Table 64. Rate-of-change frequency protection SAPFRC
Function
Operate value, start function
Operate value, restore enable frequency
Definite restore time delay
Definite time delay for frequency gradient trip
Definite reset time delay
76
Range or value
(-10.00-10.00) Hz/s
(45.00-65.00) Hz
(0.000-60.000) s
(0.200-60.000) s
(0.000-60.000) s
1MRK505310-BEN C
Accuracy
±10.0 mHz/s
±2.0 mHz
±0.2% or ±100 ms whichever is
greater
±0.2% or ±120 ms whichever is
greater
±0.2% or ±250 ms whichever is
greater
ABB