Measurement functions
Table 60. Three-phase current measurement (CMMXU)
Characteristic
Value
Operation accuracy
Depending on the frequency of the current
measured: f
n
±2 Hz
±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: -50 dB at f = n x f
n
, where n = 2, 3, 4, 5,
…
RMS: No suppression
Table 61. Residual current measurement (RESCMMXU)
Characteristic
Value
Operation accuracy
Depending on the frequency of the current
measured: f/f
n
= ±2 Hz
±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: -50 dB at f = n x f
n
, where n = 2, 3, 4, 5,
…
RMS: No suppression
Table 62. Three-phase voltage measurement (VMMXU)
Characteristic
Value
Operation accuracy
Depending on the frequency of the voltage
measured: f
n
±2 Hz
At voltages in range 0.01…1.15 x U
n
±0.5% or ±0.002 x U
n
Suppression of harmonics
DFT: -50 dB at f = n x f
n
, where n = 2, 3, 4, 5,
…
RMS: No suppression
Motor Protection and Control
1MRS756890 D
REM615
Product version: 3.0
Issued: 2010-06-29
48
ABB
Summary of Contents for RELION REM615
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