Measurement Functions; Three-Phase Current Measurement (Cmmxu); Sequence Current Measurement (Csmsqi); Residual Current Measurement (Rescmmxu) - ABB REX640 Product Manual

REX640
Product version: 1

Measurement functions

Table 204. Three-phase current measurement (CMMXU)
Characteristic
Operation accuracy
Suppression of harmonics
Table 205. Sequence current measurement (CSMSQI)
Characteristic
Operation accuracy
Suppression of harmonics
Table 206. Residual current measurement (RESCMMXU)
Characteristic
Operation accuracy
Suppression of harmonics
Table 207. Three-phase voltage measurement (VMMXU)
Characteristic
Operation accuracy
Suppression of harmonics
Table 208. Single-phase voltage measurement (VAMMXU)
Characteristic
Operation accuracy
Suppression of harmonics
94
Value
Depending on the frequency of the measured current: f
±0.5% or ±0.002 × I
n
(at currents in the range of 0.01...4.00 × I
DFT: -50 dB at f = n × f , where n = 2, 3, 4, 5,...
n
RMS: No suppression
Value
Depending on the frequency of the measured current: f/f
±1.0% or ±0.002 × I
n
at currents in the range of 0.01...4.00 × I
DFT: -50 dB at f = n × f , where n = 2, 3, 4, 5,...
n
Value
At the frequency f = f
n
±0.5% or ±0.002 × I
n
(at currents in the range of 0.01...4.00 × I
DFT: -50 dB at f = n × f , where n = 2, 3, 4, 5,...
n
RMS: No suppression
Value
Depending on the frequency of the voltage measured: f
At voltages in range 0.01...1.15 × U
±0.5% or ±0.002 × U
n
DFT: -50 dB at f = n × f , where n = 2, 3, 4, 5,...
n
RMS: No suppression
Value
Depending on the frequency of the voltage measured: f
At voltages in range 0.01...1.15 × U
±0.5% or ±0.002 × U
n
DFT: -50 dB at f = n × f , where n = 2, 3, 4, 5,...
n
RMS: No suppression
1MRS759144 A
±2 Hz
n
)
n
= ±2 Hz
n
n
)
n
±2 Hz
n
n
±2 Hz
n
n
ABB