Rate-Of-Change Frequency Protection Sapfrc - ABB RED670 Product Manual

Line differential protection RED670 2.1 IEC
Product version: 2.1
Table 69. 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
ABB
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
1MRK 505 346-BEN -
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
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