ABB RET630 - Voltage Sequence Components; Three-Phase Power Measurement; Current Sequence Components; Residual Voltage Measurement

Table 73. Residual voltage measurement (RESVMMXU)
Characteristic Value
Operation accuracy At the frequency f = f
n
±0.5% or ±0.002 × U
n
Suppression of harmonics DFT: -50dB at f = n × f
n
, where n = 2, 3, 4, 5,
…
RMS: No suppression
Table 74. Three-phase power measurement (PWRMMXU)
Characteristic
Value
Operation accuracy At all three currents in range 0.10…1.20 x In
n
At all three voltages in range 0.50…1.15 x U
n
At the frequency f = f
n
Active power and energy in range |PF| > 0.71
Reactive power and energy in range |PF| <
0.71
±1.5% for power (S, P and Q)
±0.015 for power factor
Suppression of harmonics DFT: -50dB at f = n x f
n
, where n = 2, 3, 4, 5,
…
Table 75. Current sequence components (CSMSQI)
Characteristic
Value
Operation accuracy At the frequency f = f
n
±1.0% or ±0.002 x I
n
at currents in the range of 0.01...4.00 x I
n
Suppression of harmonics DFT: -50dB at f = n x f
n
, where n = 2, 3, 4, 5,
…
Table 76. Voltage sequence components (VSMSQI)
Characteristic
Value
Operation accuracy At the frequency f = f
n
±1.0% or ±0.002 x U
n
At voltages in range of 0.01…1.15 x U
n
Suppression of harmonics DFT: -50 dB at f = n x f
n
, where n = 2, 3, 4, 5,
…
Transformer Protection and Control 1MRS756788 A
RET630
Product version: 1.0 Issued: 15.09.2009
48 ABB