Trend Records
Function Description
NOTE
This function is only available in SICAM P855.
The function Trend records ensures the acquisition and long-term monitoring of the voltage V
rms
(1/2-cycle)
values during voltage changes. The function Trend records compares the 1/2-cycle RMS value calculated from
measured value with last recorded 1/2-cycle RMS value in every 1/2 cycle. If the difference exceeds or falls
below the Tolerance number, the new 1/2-cycle RMS value is recorded.
[dw_trend_rec_Vrms, 2, en_US]
Figure 6-25 Example for Voltage Changes
Once the measuring interval ends, the next measuring interval starts automatically. You can set the following
parameters via the Web pages:
•
Tolerance number
•
Maximum recording interval
Table 6-20
Recording and Evaluation
Measured Quantities PQDIF
Va x
Vb x
Vc x
Vab x
Vbc x
Vca x
•
Interfaces: protocols IEC61850, HTML
•
Conditions: 1/2 cycle, RMS values
6.7
6.7.1
Power Quality
6.7 Trend Records
144 SICAM, SICAM P850/P855 7KG85X, Manual
E50417-H1040-C482-A9, Edition 03.2022
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