Average Measurements; Functional Description; Setting Notes - Siemens SIPROTEC 4 Manual

Overcurrent time protection
Hide thumbs Also See for SIPROTEC 4:
Table of Contents

Advertisement

Functions
2.23 Auxiliary Functions
No.
Information
18474
Vb-c RMS=
18475
Vc-a RMS=
30701
Pa =
30702
Pb =
30703
Pc =
30704
Qa =
30705
Qb =
30706
Qc =
30707
PFa =
30708
PFb =
30709
PFc =
30800
VX =
30801
Vph-n =
2.23.4

Average Measurements

The long-term averages are calculated and output by the 7SJ80.
2.23.4.1

Functional Description

Long-Term Averages
The long-term averages of the three phase currents Ι
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.
2.23.4.2

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.
292
Type of
Comments
Informa-
tion
MV
Vb-c RMS(10 minute RMS value)
MV
Vc-a RMS(10 minute RMS value)
MV
Pa (active power, phase A)
MV
Pb (active power, phase B)
MV
Pc (active power, phase C)
MV
Qa (reactive power, phase A)
MV
Qb (reactive power, phase B)
MV
Qc (reactive power, phase C)
MV
Power Factor, phase A
MV
Power Factor, phase B
MV
Power Factor, phase C
MV
Voltage VX
MV
Voltage phase-neutral
, the positive sequence components Ι
x
for the three
1
SIPROTEC 4, 7SJ80, Manual
E50417-G1140-C343-A8, Edition 12.2017

Hide quick links:

Advertisement

Table of Contents
loading

This manual is also suitable for:

Siprotec 7sj80Siprotec 4 7saj8

Table of Contents