ABB REF630 User Manual

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

ABB REF630 Specifications

General

Brand	ABB
Model	REF630
Category	Protection Device
Language	English