GE Multilin 745 Communications Manual page 28

Transformer protection system
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MODBUS PROTOCOL
Table 2–4: 745 memory map (Sheet 10 of 56)
Addr
Description
028B
Winding 1 average phase current
028C
Reserved
028D
Reserved
028E
Reserved
028F
Reserved
Winding 2 current
0290
Winding 2 phase A current magnitude
0291
Winding 2 phase A current angle
0292
Winding 2 phase B current magnitude
0293
Winding 2 phase B current angle
0294
Winding 2 phase C current magnitude
0295
Winding 2 phase C current angle
0296
Winding 2 neutral current magnitude
0297
Winding 2 neutral current angle
0298
Winding 2 ground current magnitude
0299
Winding 2 ground current angle
029A
Winding 2 loading
029B
Winding 2 average phase current
029C
Reserved
029D
Reserved
029E
Reserved
029F
Reserved
Winding 3 current
02A0
Winding 3 phase A current magnitude
02A1
Winding 3 phase A current angle
02A2
Winding 3 phase B current magnitude
02A3
Winding 3 phase B current angle
02A4
Winding 3 phase C current magnitude
02A5
Winding 3 phase C current angle
02A6
Winding 3 neutral current magnitude
02A7
Winding 3 neutral current angle
02A8
Winding 3 ground current magnitude
02A9
Winding 3 ground current angle
02AA
Winding 3 loading
02AB
Winding 3 average phase current
02AC
Reserved
02AD
Reserved
02AE
Reserved
02AF
Reserved
Sequence currents
02B0
Winding 1 positive-sequence current magnitude
02B1
Winding 1 positive-sequence current angle
02B2
Winding 2 positive-sequence current magnitude
02B3
Winding 2 positive-sequence current angle
02B4
Winding 3 positive-sequence current magnitude
02B5
Winding 3 positive-sequence current angle
02B6
Winding 1 negative-sequence current magnitude
2–22
Range
Step
---
---
---
---
0 to 359
1
---
---
0 to 359
1
---
---
0 to 359
1
---
---
0 to 359
1
---
---
0 to 359
1
0 to 999
1
% rated
---
---
---
---
0 to 359
1
---
---
0 to 359
1
---
---
0 to 359
1
---
---
0 to 359
1
---
---
0 to 359
1
0 to 999
1
% rated
---
---
---
---
0 to 359
1
---
---
0 to 359
1
---
---
0 to 359
1
---
---
745 TRANSFORMER PROTECTION SYSTEM – COMMUNICATIONS GUIDE
CHAPTER 2: MODBUS PROTOCOL
Units
Format
Default
A
F78
---
A
F79
---
° Lag
F1
---
A
F79
---
° Lag
F1
---
A
F79
---
° Lag
F1
---
A
F79
---
° Lag
F1
---
A
F82
---
° Lag
F1
---
F1
---
A
F79
---
A
F80
---
° Lag
F1
---
A
F80
---
° Lag
F1
---
A
F80
---
° Lag
F1
---
A
F80
---
° Lag
F1
---
A
F83
---
° Lag
F1
---
F1
---
A
F80
---
A
F78
---
° Lag
F1
---
A
F79
---
° Lag
F1
---
A
F80
---
° Lag
F1
---
A
F78
---

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