Power Data Structure; Power Register Values - Arbiter Systems Power Sentinel 1133A Operation Manual

138
DNP Modbus
Type:Index Input Reg.
AI:24 30025
AI:25 30026
AI:26 30027
AI:27 30028
AI:28 30029
AI:29 30030
AI:30 30031
AI:31 30032
AI:32 30033
AI:33 30034
AI:34 30035
AI:35 30036
AI:36 30037
AI:37 30038
AI:38 30039
AI:39 30040
AI:40 30041
AI:41 30042
AI:42 30043
AI:43 30044
AI:44 30045
AI:45 30046
AI:46 30047
AI:47 30048
13.4

Power Data Structure

The 1133A determines power quantities based on the cross product of measured voltages and
currents. For additional details on this measurement, see Section 11.8, "Functional Description,
Power and Energy."
DNP users should be able to download any of the Quantities listed in Table 13.2 by using the
Index value associated with it.
For example, call C-phase Active Power with index number 29, or C-phase power factor with
index number 11. The measurement resolution is determined by the maximum current divided by
32767.
Quantity
A Active Power (W)
A Reactive Power (VAR)
A Apparent Power (VA)
A Power Factor
A Q
Reserved
C Active Power (W)
C Reactive Power (VAR)
C Apparent Power (VA)
C Power Factor
C Q
Reserved
B Active Power (W)
B Reactive Power (VAR)
B Apparent Power (VA)
B Power Factor
B Q
Reserved
Total Active Power (W)
Total Reactive Power (VAR)
Total Apparent Power (VA)
Total Power Factor
Total Q
Reserved
Table 13.2: Power Register Values
DNP 3.0 and MODBUS Data Structures
Full Scale
Pmax =
Pmax =
Pmax = 32767
1.0000 =
Pmax =
0
Pmax =
Pmax =
Pmax = 32767
1.0000 =
Pmax =
0
Pmax =
Pmax =
Pmax = 32767
1.0000 =
Pmax =
0
Ptmax =
Ptmax =
Ptmax = 32767
1.0000 =
Ptmax =
0
32767
32767
32767
32767
32767
32767
32767
32767
32767
32767
32767
32767
32767
32767
32767
32767