ABB RELION Series, Technical Manual

Page: 571 / 804

8.1.4.6 Technical data
Table 572: 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 573: CMMXU Technical revision history
Technical revision Change
B Menu changes
C Phase current angle values added to Monitored
data view. Minimum demand value and time
added to recorded data. Logarithmic demand
calculation mode added and demand interval
setting moved under Measurement 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 measurement VMMXU 3U 3V
8.1.5.2 Function block
GUID-5B741292-7FA6-4DEA-8D16-B530FD16A0FE V1 EN
Figure 296: Function block
1MRS758755 A
Section 8
Measurement functions
REC615 and RER615 565
Technical Manual