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Table 87. Three-phase voltage measurement (VPPMMXU )
Characteristic
Value
Operation accuracy
At the frequency f = f
n
±0.5% or ±0.002 x U
n
(at voltages in the range of 0.01...1.15 × U
n
)
Suppression of harmonics
DFT: -50dB at f = n × f
n
, where n = 2, 3, 4, 5,
…
RMS: No suppression
Table 88. Residual current measurement (RESCMMXU)
Characteristic
Value
Operation accuracy
At the frequency f = f
n
±0.5% 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,
…
RMS: No suppression
Table 89. 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
Feeder Protection and Control
1MRS756380 A
REF630
Product version: 1.0
Issued: 15.09.2009
ABB
57
Summary of Contents for REF630
Page 1: ...Relion 630 series Feeder Protection and Control REF630 Product Guide ...
Page 78: ...78 ...
Page 79: ......