ABB Relion RER615 - Three-Phase Voltage Measurement VMMXU

Table 591: CMMXU Technical data
Characteristic Value
Operation accuracy Depending on the frequency of the measured current: f
n
±2
Hz
±0.5 % or ±0.002 × I
n
(at currents in the range of 0.01...4.00 × I
n
)
Suppression of harmonics
DFT: -50 dB at f = n × f
n
, where n = 2, 3, 4, 5,…
RMS: No suppression
8.1.4.7 Technical revision history
Table 592: CMMXU Technical revision history
Technical revision Change
B Menu changes
C Phase current angle values added to Moni-
tored data view. Minimum demand value
and time added to recorded data. Logarith-
mic demand calculation mode added and de-
mand interval setting moved under Measure-
ment menu as general setting to all demand
calculations.
D Internal improvement.
E Internal improvement.
8.1.5 Three-phase voltage measurement VMMXU
8.1.5.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE
C37.2 device
number
Three-phase voltage measure-
ment
VMMXU 3U 3V
8.1.5.2 Function block
Figure 295: Function block
8.1.5.3 Signals
Measurement functions
1MRS758755 C
582 REC615 & RER615
Technical Manual