ABB RELION REX640 Technical Manual page 1065

1MRS759142 C
REX640
Technical Manual
Characteristic
Retardation time
Operate time accuracy
Suppression of harmonics
Start value = 0.1 × U
1) , Voltage before fault = 0.9 × U
n
nominal frequency injected from random phase angle, results based on statistical distribution of 1000
measurements
2) Measured with static signal output (SSO)
Protection functions
Value
<35 ms
±1.0% of the set value or ±20 ms
DFT: -50 dB at f = n × f , where n = 2, 3, 4, 5,...
n
, f = 50 Hz, overvoltage in one phase-to-earth with
n n
Section 4
1059