Table 209. Residual voltage measurement (RESVMMXU)
Characteristic
Value
Operation accuracy
Depending on the frequency of the measured voltage: f/f
n
= ±2 Hz
±0.5% or ±0.002 × U
n
Suppression of harmonics
DFT: -50 dB at f = n × f
n
, where n = 2, 3, 4, 5,…
RMS: No suppression
Table 210. Sequence voltage measurement (VSMSQI)
Characteristic
Value
Operation accuracy
Depending on the frequency of the voltage measured: f
n
±2 Hz
At voltages in range 0.01…1.15 × U
n
±1.0% or ±0.002 × U
n
Suppression of harmonics
DFT: -50 dB at f = n × f
n
, where n = 2, 3, 4, 5,…
Table 211. Three-phase power and energy measurement (PEMMXU)
Characteristic
Value
Operation accuracy
At all three currents in range 0.10…1.20 × I
n
At all three voltages in range 0.50…1.15 × U
n
At the frequency f
n
±1 Hz
±1.5% for apparent power S
±1.5% for active power P and active energy
1)
±1.5% for reactive power Q and reactive energy
2)
±0.015 for power factor
Suppression of harmonics
DFT: -50 dB at f = n × f
n
, where n = 2, 3, 4, 5,…
1)
|PF| >0.5 which equals |cos
φ
| >0.5
2)
|PF| <0.86 which equals |sin
φ
| >0.5
Table 212. Frequency measurement (FMMXU)
Characteristic
Value
Operation accuracy
±5 mHz
(in measurement range 35...75 Hz)
Table 213. Tap changer position indication (TPOSYLTC)
Descrpition
Value
Response time for binary inputs
Typical 100 ms
1MRS759144 A
REX640
Product version: 1
ABB
95
Summary of Contents for RELION REX640
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