Average Measurements; Description; Setting Notes; Settings - Siemens siprotec SJ62 User Manual

2 Functions

2.23.5 Average Measurements

2.23.5.1 Description

Long-Term Averag-
es

2.23.5.2 Setting Notes

Average Calcula-
tion

2.23.5.3 Settings

Addr. Parameter
8301 DMD Interval
8302 DMD Sync.Time
335
The long-term averages are calculated and output by the 7SJ62/63/64.
The long-term averages of the three phase currents I
nents I for the three phase currents, and the real power P, reactive power Q, and ap-
1
parent 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 aver-
aging and the frequency with which it is updated can be set.
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 MEA-
SUREMENT. 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, 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.
Setting Options
15 Min., 1 Sub
15 Min., 3 Subs
15 Min.,15 Subs
30 Min., 1 Sub
60 Min., 1 Sub
60 Min.,10 Subs
5 Min., 5 Subs
On The Hour
15 After Hour
30 After Hour
45 After Hour
, the positive sequence compo-
x
Default Setting
60 Min., 1 Sub Demand Calculation Intervals
On The Hour Demand Synchronization Time
SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015
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