ABB RELION 615 Series Product Manual page 48

Transformer Protection and Control
RET615
Product version: 5.0 FP1
Measurement functions
Table 60. Three-phase current measurement (CMMXU)
Characteristic
Operation accuracy
Suppression of harmonics
Table 61. Sequence current measurement (CSMSQI)
Characteristic
Operation accuracy
Suppression of harmonics
Table 62. Residual current measurement (RESCMMXU)
Characteristic
Operation accuracy
Suppression of harmonics
Table 63. Three-phase voltage measurement (VMMXU)
Characteristic
Operation accuracy
Suppression of harmonics
Table 64. Residual voltage measurement (RESVMMXU)
Characteristic
Operation accuracy
Suppression of harmonics
48
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
1MRS756891 M
±2 Hz
n
)
n
= ±2 Hz
n
n
= ±2 Hz
n
n
±2 Hz
n
n
= ±2 Hz
n
ABB