GE Multilin 745 Communications Manual page 29

Transformer protection system
Table of Contents

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CHAPTER 2: MODBUS PROTOCOL
Table 2–4: 745 memory map (Sheet 11 of 56)
Addr
Description
02B7
Winding 1 negative-sequence current angle
02B8
Winding 2 negative-sequence current magnitude
02B9
Winding 2 negative-sequence current angle
02BA
Winding 3 negative-sequence current magnitude
02BB
Winding 3 negative-sequence current angle
02BC
Winding 1 zero-sequence current magnitude
02BD
Winding 1 zero-sequence current angle
02BE
Winding 2 zero-sequence current magnitude
02BF
Winding 2 zero-sequence current angle
02C0
Winding 3 zero-sequence current magnitude
02C1
Winding 3 zero-sequence current angle
02C2
Reserved
02C3
Reserved
02CF
Reserved
Differential current
02D0
Phase A differential current magnitude
02D1
Phase A differential current angle
02D2
Phase B differential current magnitude
02D3
Phase B differential current angle
02D4
Phase C differential current magnitude
02D5
Phase C differential current angle
Restraint current
02D6
Phase A restraint current
02D7
Phase B restraint current
02D8
Phase C restraint current
Ground differential current
02D9
Winding 1 ground differential current
02DA
Winding 2 ground differential current
02DB
Winding 3 ground differential current
02DC
Reserved
02DD
Reserved
02DE
Reserved
02DF
Reserved
2nd harmonic
02E0
Winding 1 phase A 2nd harmonic content
02E1
Winding 1 phase B 2nd harmonic content
02E2
Winding 1 phase C 2nd harmonic content
02E3
Winding 2 phase A 2nd harmonic content
02E4
Winding 2 phase B 2nd harmonic content
02E5
Winding 2 phase C 2nd harmonic content
02E6
Winding 3 phase A 2nd harmonic content
02E7
Winding 3 phase B 2nd harmonic content
02E8
Winding 3 phase C 2nd harmonic content
02E9
Reserved
02EA
Reserved
745 TRANSFORMER PROTECTION SYSTEM – COMMUNICATIONS GUIDE
Range
Step
0 to 359
1
---
---
0 to 359
1
---
---
0 to 359
1
---
---
0 to 359
1
---
---
0 to 359
1
---
---
0 to 359
1
0.00 to 655.35
0.01
0 to 359
1
0.00 to 655.35
0.01
0 to 359
1
0.00 to 655.35
0.01
0 to 359
1
0.00 to 655.35
0.01
0.00 to 655.35
0.01
0.00 to 655.35
0.01
0.000 to 65.535
0.001
0.000 to 65.535
0.001
0.000 to 65.535
0.001
0.0 to 99.9
0.1
0.0 to 99.9
0.1
0.0 to 99.9
0.1
0.0 to 99.9
0.1
0.0 to 99.9
0.1
0.0 to 99.9
0.1
0.0 to 99.9
0.1
0.0 to 99.9
0.1
0.0 to 99.9
0.1
MODBUS PROTOCOL
Units
Format
Default
° Lag
F1
---
A
F79
---
° Lag
F1
---
A
F80
---
° Lag
F1
---
A
F78
---
° Lag
F1
---
A
F79
---
° Lag
F1
---
A
F80
---
° Lag
F1
---
x CT
F3
---
° Lag
F1
---
x CT
F3
---
° Lag
F1
---
x CT
F3
---
° Lag
F1
---
x CT
F3
---
x CT
F3
---
x CT
F3
---
x CT
F53
---
x CT
F53
---
x CT
F53
---
% ƒo
F2
---
% ƒo
F2
---
% ƒo
F2
---
% ƒo
F2
---
% ƒo
F2
---
% ƒo
F2
---
% ƒo
F2
---
% ƒo
F2
---
% ƒo
F2
---
2–23

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