Phase Sequence And Transformer Polarity - GE SR345 Instruction Manual

CHAPTER 2: INSTALLATION
1 POWER SUPPLY -
2 W1 TRIP N/O
3 W1 TRIP OPTV
4 W2 TRIP COM
AUX 3 N/C
5
AUX 3 N/O
6
7 AUX 4 COM
8 AUX 5 N/C
9 AUX 5 N/O
10 AUX 6 COM
CRIT FAIL N/C
11
CRIT FAIL N/O
12

Phase sequence and transformer polarity

345 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
Courtesy of NationalSwitchgear.com
Figure 10: Terminal Identification
POWER SUPPLY +
1
CHASSIS GND
2
W1 TRIP COM
3
W2 TRIP N/O
4
W2 TRIP OPTV
5
AUX 3 COM
6
AUX 4 N/C
7
AUX 4 N/O
8
AUX 5 COM
9
AUX 6 N/C
10
AUX 6 N/O
11
CRIT FAIL COM
12
A B
For correct operation of the relay features, the user must follow the instrument
transformer polarities, shown in the Typical Wiring Diagram. Note the solid square
markings shown with all instrument transformer connections. The phase sequence is user
programmable for either ABC or ACB rotation.
INPUT 1
INPUT 2
INPUT 3
INPUT 4
INPUT 5
W1 PHASE A CT
INPUT 6
W1 PHASE B CT
INPUT 7
W1 PHASE C CT
INPUT 8
W1 GND CT
INPUT 9
W2 PHASE A CT
INPUT 10
W2 PHASE B CT
INPUT COM
W2 PHASE C CT
CHASSIS GND
W2 GND CT
C
ELECTRICAL INSTALLATION
F
1 IRIG-B +
2 IRIG-B -
3 RS485 +
4 RS485 -
5 RS485 COM
6 CHASSIS GND
7 RESERVED
8 RESERVED
■
W1 PHASE A CT
5
■
W1 PHASE B CT
6
■
W1 PHASE C CT 7
■
W1 GND CT 8
■
W2 PHASE A CT 9
■
10
W2 PHASE B CT
■
11
W2 PHASE C CT
■
12
W2 GND CT
D E
2–9