8.1.5.4 Settings
Table 543: VMMXU Non group settings
Parameter Values (Range) Unit Step Default Description
Operation 1=on
5=off
1=on Operation Off / On
Measurement mode 1=RMS
2=DFT
2=DFT Selects used measurement mode
Num of phases 1=1 out of 3
2=2 out of 3
3=3 out of 3
1=1 out of 3 Number of phases required by limit
supervision
V high high limit 0.00...4.00 xUn 1.40 High alarm voltage limit
V high limit 0.00...4.00 xUn 1.20 High warning voltage limit
V low limit 0.00...4.00 xUn 0.00 Low warning voltage limit
V low low limit 0.00...4.00 xUn 0.00 Low alarm voltage limit
V deadband 100...100000 10000 Deadband configuration value for
integral calculation. (percentage of
difference between min and max as
0,001 % s)
8.1.5.5 Monitored data
Table 544: VMMXU Monitored data
Name
Type Values (Range) Unit Description
U12-kV FLOAT32 0.00...4.00 xUn Measured phase to
phase voltage amplitude
phase AB
U23-kV FLOAT32 0.00...4.00 xUn Measured phase to
phase voltage amplitude
phase BC
U31-kV FLOAT32 0.00...4.00 xUn Measured phase to
phase voltage amplitude
phase CA
8.1.5.6 Technical data
Table 545: VMMXU Technical data
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
1YHT530004D05 D Section 8
Measurement functions
615 series 637
Technical Manual
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