Measurement Functions; Three-Phase Current Measurement (Cmmxu); Sequence Current Measurement (Csmsqi); Residual Current Measurement/Three-Phase Voltage Measurement (Vmmxu) - ABB REV615 Product Manual

Capacitor Bank Protection and Control
REV615
Product version: 5.0 FP1

Measurement functions

Table 71. Three-phase current measurement (CMMXU)
Characteristic
Operation accuracy
Suppression of harmonics
Table 72. Sequence current measurement (CSMSQI)
Characteristic
Operation accuracy
Suppression of harmonics
Table 73. Residual current measurement (RESCMMXU)
Characteristic
Operation accuracy
Suppression of harmonics
Table 74. Three-phase voltage measurement (VMMXU)
Characteristic
Operation accuracy
Suppression of harmonics
Table 75. Residual voltage measurement (RESVMMXU)
Characteristic
Operation accuracy
Suppression of harmonics
ABB
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
Depending on the frequency of the current measured: f/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 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 measured voltage: f/f
±0.5% or ±0.002 × U
n
DFT: -50 dB at f = n × f , where n = 2, 3, 4, 5,...
n
RMS: No suppression
1MRS757952 D
±2 Hz
n
)
n
= ±2 Hz
n
n
= ±2 Hz
n
n
±2 Hz
n
n
= ±2 Hz
n
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