ABB REF615 - Section 4: Using HMI Locally or via Web Interface; 4.1 Using LHMI; 4.1.1 LHMI Login and Logout

ABB 37
Feeder Protection and Control
REF615
Product version: 2.0
1MRS756379 D
Measurement functions
Table 58. Three-phase current measurement (CMMXU)
Operation
accuracy
Depending on the frequency of the current measured: f
n
±2Hz
±0.5% or ±0.002 x In
(at currents in the range of 0.01...4.00 x In)
Suppression of
harmonics
DFT: -50dB at f = n x fn, where n = 2, 3, 4, 5,…
RMS: No suppression
Table 59. Three-phase voltage measurement (VMMXU)
Operation
accuracy
Depending on the frequency of the voltage measured: f
n
±2Hz
(at voltages in range 0.01...1.15 x U
n
)
±0.5% or ±0.002 x U
n
Suppression of
harmonics
DFT: -50dB at f = n x f
n
, where n = 2, 3, 4, 5,…
RMS: No suppression
Table 59. Current sequence components (CSMSQI)
Operation
accuracy
Depending on the frequency of the current measured: f/fn = ±2Hz
±1.0% or ±0.002 x In
at currents in the range of 0.01...4.00 x In
Suppression of
harmonics
DFT: -50dB at f = n x fn, where n = 2, 3, 4, 5,…
Table 60. Voltage sequence components (VSMSQI)
Operation
accuracy
Depending on the frequency of the voltage measured: f
n
±2Hz
at voltages in the range of 0.01…1.15 x U
n
±1.0% or ±0.002 x U
n
Suppression of
harmonics
DFT: -50dB at f = n x f
n
, where n = 2, 3, 4, 5,…
Table 61. Residual current measurement (RESCMMXU)
Operation
accuracy
Depending on the frequency of the current measured: f/fn = ±2Hz
±0.5% or ±0.002 x In
at currents in the range of 0.01...4.00 x In
Suppression of
harmonics
DFT: -50dB at f = n x fn, where n = 2, 3, 4, 5,…
RMS: No suppression
Table 62. Residual voltage measurement (RESVMMXU)
Operation
accuracy
Depending on the frequency of the current measured: f/fn = ±2Hz
±0.5% or ±0.002 x Un
Suppression of
harmonics
DFT: -50dB at f = n x fn, where n = 2, 3, 4, 5,…
RMS: No suppression