No. Information Type of
Informa-
tion
Comments
18474 Vb-c RMS= MV Vb-c RMS(10 minute RMS value)
18475 Vc-a RMS= MV Vc-a RMS(10 minute RMS value)
30701 Pa = MV Pa (active power, phase A)
30702 Pb = MV Pb (active power, phase B)
30703 Pc = MV Pc (active power, phase C)
30704 Qa = MV Qa (reactive power, phase A)
30705 Qb = MV Qb (reactive power, phase B)
30706 Qc = MV Qc (reactive power, phase C)
30707 PFa = MV Power Factor, phase A
30708 PFb = MV Power Factor, phase B
30709 PFc = MV Power Factor, phase C
30800 VX = MV Voltage VX
30801 Vph-n = MV Voltage phase-neutral
Average Measurements
The long-term averages are calculated and output by the 7SJ80.
Functional Description
Long-Term Averages
The long-term averages of the three phase currents Ι
x
, the positive sequence components Ι
1
for the three
phase currents, and the real power P, reactive power Q, and apparent power S are calculated within a set
period of time and indicated in primary values.
For the long-term averages mentioned above, the length of the time window for averaging and the frequency
with which it is updated can be set.
Setting Notes
Average Calculation
The selection of the time period for measured value averaging is set with parameter 8301 DMD Interval in
the corresponding setting group from A to D under MEASUREMENT. The first number specifies the averaging
time window in minutes while the second number gives the frequency of updates within the time window. 15
Min., 3 Subs, for example, means: Time average is generated for all measured values with a window of 15
minutes. The output is updated every 15/3 = 5 minutes.
With address 8302 DMD Sync.Time, the starting time for the averaging window set under address 8301 is
determined. This setting specifies if the window should start on the hour (On The Hour) or 15 minutes later
(15 After Hour) or 30 minutes / 45 minutes after the hour (30 After Hour oder 45 After Hour).
If the settings for averaging are changed, then the measured values stored in the buffer are deleted, and new
results for the average calculation are only available after the set time period has passed.
2.23.4
2.23.4.1
2.23.4.2
Functions
2.23 Auxiliary Functions
292 SIPROTEC 4, 7SJ80, Manual
E50417-G1140-C343-A8, Edition 12.2017
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