Measurement Functions - ABB REF615 Product Manual

ABB
Feeder Protection and Control
REF615
Product version: 2.0

Measurement functions

Table 58. Three-phase current measurement (CMMXU)
Operation Depending on the frequency of the current measured: f
accuracy
±0.5% or ±0.002 x In
(at currents in the range of 0.01...4.00 x In)
Suppression of DFT: -50dB at f = n x fn, where n = 2, 3, 4, 5,...
harmonics RMS: No suppression
Table 59. Current sequence components (CSMSQI)
Operation Depending on the frequency of the current measured: f/fn = ±2Hz
accuracy
±1.0% or ±0.002 x In
at currents in the range of 0.01...4.00 x In
Suppression of DFT: -50dB at f = n x fn, where n = 2, 3, 4, 5,...
harmonics
Table 59. Three-phase voltage measurement (VMMXU)
Operation Depending on the frequency of the voltage measured: f
accuracy (at voltages in range 0.01...1.15 x U
±0.5% or ±0.002 x U
Suppression of DFT: -50dB at f = n x f
harmonics RMS: No suppression
Table 60. Voltage sequence components (VSMSQI)
Operation Depending on the frequency of the voltage measured: f
accuracy at voltages in the range of 0.01...1.15 x U
±1.0% or ±0.002 x U
Suppression of DFT: -50dB at f = n x f
harmonics
Table 61. Residual current measurement (RESCMMXU)
Operation Depending on the frequency of the current measured: f/fn = ±2Hz
accuracy
±0.5% or ±0.002 x In
at currents in the range of 0.01...4.00 x In
Suppression of DFT: -50dB at f = n x fn, where n = 2, 3, 4, 5,...
harmonics RMS: No suppression
Table 62. Residual voltage measurement (RESVMMXU)
Operation Depending on the frequency of the current measured: f/fn = ±2Hz
accuracy
±0.5% or ±0.002 x Un
Suppression of DFT: -50dB at f = n x fn, where n = 2, 3, 4, 5,...
harmonics RMS: No suppression
)
n
n
, where n = 2, 3, 4, 5,...
n
n
n
, where n = 2, 3, 4, 5,...
n
1MRS756379 D
±2Hz
n
±2Hz
n
±2Hz
n
37