GE 745 Instruction Manual page 40

TYPICAL WIRING
3–8
Table 3–1: Rear terminal assignments (Sheet 1 of 2)
Term. Description
Analog interface
A1 Analog input +
A2 Analog input –
A3 Tap position (+)
A4 Tap position (–)
A5 Analog output (common)
A6 Analog output 1 (+)
A7 Analog output 2 (+)
A8 Analog output 3 (+)
A9 Analog output 4 (+)
A10 Analog output 5 (+)
A11 Analog output 6 (+)
A12 Analog output 7 (+)
Communications and RTD inputs
B1 Computer RS485 (+) / RS422 (Rx+)
B2 Computer RS485 (–) / RS422 (Rx–)
B3 Computer RS485/RS422 (common)
B4 RS422 (Tx+)
B5 RS422 (Tx–)
B6 External RS485 (+)
B7 External RS485 (–)
B8 IRIG-B +
B9 IRIG-B –
B10 RTD 1 hot
B11 RTD 1 compensation
B12 RTD 1 return
Logic inputs 9 to 16 and VT input
C1 Logic input 9 (+)
C2 Logic input 10 (+)
C3 Logic input 11 (+)
C4 Logic input 12 (+)
C5 Logic input 13 (+)
C6 Logic input 14 (+)
C7 Logic input 15 (+)
C8 Logic input 16 (+)
C9 Reserved
C10 Reserved
C11 VT input
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C12 VT input
Logic inputs 1 to 8 and dedicated inputs
D1 Logic input 1 (+)
D2 Logic input 2 (+)
D3 Logic input 3 (+)
D4 Logic input 4 (+)
Term.
Outputs and ground CT N2
E1 Output 1: solid state trip (+)
E2 Output 2: trip relay (NO)
E3 Output 3: trip relay (NO)
E4 Output 4: trip relay (NO)
E5 Output 5: trip relay (NO)
E6 Output 6: auxiliary relay (NO)
E7 Output 6: auxiliary relay (NC)
E8 Output 7: auxiliary relay (NO)
E9 Output 8: auxiliary relay (NO)
E10 Output 8: auxiliary relay (NC)
E11 Output 9: service relay (common)
E12 Ground: winding 2/3 CT
Outputs and ground CT N2
F1 Output 1: solid state trip (–)
F2 Output 2: trip relay (common)
F3 Output 3: trip relay (common)
F4 Output 4: trip relay (common)
F5 Output 5: trip relay (common)
F6 Output 6: auxiliary relay (common)
F7 Output 7: auxiliary relay (NO)
F8 Output 7: auxiliary relay (NC)
F9 Output 8: auxiliary relay (common)
F10 Output 9: service relay (NO)
F11 Output 9: service relay (NC)
F12 Ground: winding 2/3 CT
CT inputs and 745 grounding
G1 Phase A: winding 1 CT
G2 Phase B: winding 1 CT
G3 Phase C: winding 1 CT
G4 Phase A: winding 2 CT
G5 Phase B: winding 2 CT
G6 Phase C: winding 2 CT
G7 Phase A: winding 3 CT
G8 Phase B: winding 3 CT
G9 Phase C: winding 3 CT
G10 Ground: winding 1/2 CT
G11 745 filter ground
G12 745 safety ground
CT and VT inputs / power
H1 Phase A: winding 1 CT
H2 Phase B: winding 1 CT
H3 Phase C: winding 1 CT
H4 Phase A: winding 2 CT
745 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 3: INSTALLATION
Description
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