8.1.7.6 Technical data
Table 556: RESVMMXU Technical data
Characteristic Value
Operation accuracy Depending on the frequency of the current
measured: f/f
n
= ±2 Hz
±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
8.1.7.7 Technical revision history
Table 557: RESVMMXU Technical revision history
Technical revision Change
B -
8.1.8 Frequency measurement FMMXU
8.1.8.1 Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Frequency measurement FMMXU1 F F
8.1.8.2 Function block
GUID-5CCF8F8C-E1F4-421B-8BE9-C0620F7446A7 V1 EN
Figure 349: Function block
8.1.8.3 Signals
Table 558: FMMXU Input signals
Name
Type Default Description
F SIGNAL — Measured system frequency
1YHT530004D05 D Section 8
Measurement functions
615 series 641
Technical Manual
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