ABB RELION 620 Series Technical Manual page 529

1MAC504801-IB E
620 series ANSI
Technical Manual
Characteristic
Reset ratio
Retardation time
Operate time accuracy
Protection functions
Value
Typically 1.04
Total retardation time when the impedance returns
from the operating circle <40 ms
±1.0% of the set value or ±20 ms
Section 4
523