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13.3 Voltage and Current Data Structure
137
13.3
Voltage and Current Data Structure
DNP
Modbus
Quantity
Full Scale
Type:Index
Input Reg.
AI:0
30001
A Voltage
Vmax = 32767
AI:1
30002
A Voltage Phase
±
180deg =
±
32767
AI:2
30003
C Voltage
Vmax = 32767
AI:3
30004
C Voltage Phase
±
180deg =
±
32767
AI:4
30005
B Voltage
Vmax = 32767
AI:5
30006
B Voltage Phase
±
180deg =
±
32767
AI:6
30007
A Current
Imax = 32767
AI:7
30008
A Current Phase
±
180deg =
±
32767
AI:8
30009
C Current
Imax = 32767
AI:9
30010
C Current Phase
±
180deg =
±
32767
AI:10
30011
B Current
Imax = 32767
AI:11
30012
B Current Phase
±
180deg =
±
32767
AI:12
30013
Zero Sequence Voltage
Vmax = 32767
AI:13
30014
Zero Sequence Voltage Phase
±
180deg =
±
32767
AI:14
30015
Positive Sequence Voltage
Vmax = 32767
AI:15
30016
Positive Sequence Voltage Phase
±
180deg =
±
32767
AI:16
30017
Negative Sequence Voltage
Vmax = 32767
AI:17
30018
Negative Sequence Voltage Phase
±
180deg =
±
32767
AI:18
30019
Zero Sequence Current
Imax = 32767
AI:19
30020
Zero Sequence Current Phase
±
180deg =
±
32767
AI:20
30021
Positive Sequence Current
Imax = 32767
AI:21
30022
Positive Sequence Current Phase
±
180deg =
±
32767
AI:22
30023
Negative Sequence Current
Imax = 32767
AI:23
30024
Negative Sequence Current Phase
±
180deg =
±
32767
Table 13.1: Voltage and Current Register Values
The 1133A measures any voltage and current by scaling an analog input (AI)
according to PT
or CT values stored in the 1133A. Users also select a nominal range to maximize accuracy, e.g. 0
to 5 Amps, or 0 to 150 Volts. Make these selections using PSCSV software prior to recording any
data or the data will not be accurate.
Thereafter, DNP users should be able to download any of the Quantities listed in Table 13.1
by using the Index value associated with it.
For example, call B-phase current magnitude with index number 10, or B-phase current phase
angle with index number 11. The measurement resolution is determined by the maximum current
divided by 32767.
1
AI indicates analog-input point, CT indicates Counter Point, BI indicates Binary Input