CHAPTER 2: INSTALLATION
ELECTRICAL INSTALLATION
345 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
2–9
Figure 10: Terminal Identification
Phase sequence and transformer polarity
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
INPUT 6
INPUT 7
INPUT 8
INPUT 9
INPUT 10
INPUT COM
CHASSIS GND
W1 PHASE A CT
W1 PHASE B CT
W1 PHASE C CT
W1 GND CT
W2 PHASE A CT
W2 PHASE B CT
W2 PHASE C CT
W2 GND CT
■
■
■
■
■
■
■
■
W1 PHASE A CT
W1 PHASE B CT
W1 PHASE C CT
W1 GND CT
W2 PHASE A CT
W2 PHASE B CT
W2 PHASE C CT
W2 GND CT
IRIG-B +
IRIG-B -
RS485 +
RS485 -
RS485 COM
CHASSIS GND
RESERVED
RESERVED
POWER
CHASSIS GND
W1 TRIP COM
W2 TRIP N/O
W2 TRIP OPTV
AUX 3 COM
AUX 4 N/C
AUX 4 N/O
AUX 5 COM
AUX 6 N/C
AUX 6 N/O
CRIT FAIL COM
POWER SUPPLY -
W1 TRIP N/O
W1 TRIP OPTV
W2 TRIP COM
AUX 3 N/C
AUX 3 N/O
AUX 4 COM
AUX 5 N/C
AUX 5 N/O
AUX 6 COM
CRIT FAIL N/C
CRIT FAIL N/O
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
5
6
7
8
9
10
11
12
A B
C
D E
F
1
2
3
4
5
6
7
8
