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ELECTRICAL INSTALLATION
POWER SUPPLY +
POWER SUPPLY -
CHASSIS GND
1
W1 TRIP N/O
W1 TRIP COM
2
3
W1 TRIP OPTV
4
W2 TRIP N/O
5
W2 TRIP COM
6
W2 TRIP OPTV
7
AUX 3 N/C
AUX 3 COM
8
9
AUX 3 N/O
AUX 4 N/C
10
11
AUX 4 COM
AUX 4 N/O
12
13
AUX 5 N/C
AUX 5 COM
14
15
AUX 5 N/O
AUX 6 N/C
16
AUX 6 COM
17
AUX 6 N/O
18
19
CRIT FAIL N/C
CRIT FAIL COM
20
21
CRIT FAIL N/O
IRIG-B +
1
IRIG-B -
2
RS485 +
3
RS485 -
4
RS485 COM
5
CHASSIS GND
6
RESERVED
7
RESERVED
8
Wire range
Phase sequence and transformer polarity
Current inputs
CAUTION:
CAUTION:
28
Figure 2-16: Terminal Identification - Non-drawout
Use the following guideline when selecting wires or lugs to connect to terminal blocks A,
B,C,D,E (Drawout case design), and terminal blocks D, E (Non-drawout case design):
•
12 AWG to 22 AWG (3.3 mm
9.53 mm (0.375") maximum diameter ring terminals.
•
14 AWG to 22 AWG (2.1 mm
wire sizes and stranding. Two wires maximum per circuit.
•
14 AWG to 22 AWG (2.1 mm
(0.375") maximum diameter ring terminals. Two ring terminals maximum per circuit.
•
Suggested wiring screw tightening torque, tighten to 12 in-lb (1.35 N-m).
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.
The 345 relay has eight (8) channels for AC current inputs, each with an isolating
transformer. There are no internal ground connections on the current inputs. Current
transformers with 1 to 6000 A primaries may be used.
Verify that the relay's nominal input current of 1 A or 5 A matches the secondary rating
of the connected CTs. Unmatched CTs may result in equipment damage or inadequate
protection.
IMPORTANT: The phase and ground current inputs will correctly measure up to 20
times the current input's nominal rating. Time overcurrent curves become horizontal
lines for currents above the 20 × CT rating. This becomes apparent if the pickup level is
set above the nominal CT rating.
1
INPUT 1
2
INPUT 2
3
INPUT 3
4
INPUT 4
5
INPUT 5
6
INPUT 6
7
INPUT 7
8
INPUT 8
9
INPUT 9
10
INPUT 10
11
INPUT COM
12
CHASSIS GND
5
W1 PHASE A CT
W1 PHASE B CT
6
7
W1 PHASE C CT
W1 GND CT
8
9
W2 PHASE A CT
W2 PHASE B CT
10
11
W2 PHASE C CT
12
W2 GND T
2
2
to 0.3 mm
): Single wire termination with/without
2
2
to 0.3 mm
): Multiple wire termination with matching
2
2
to 0.3 mm
): Multiple wire termination with 9.53 mm
345 TRANSFORMER PROTECTION SYSTEM – QUICKSTART GUIDE
CHAPTER 2: INSTALLATION
W1 PHASE A CT
■
5
W1 PHASE B CT
■
6
W1 PHASE C CT
■
7
W1 GND CT
■
8
W2 PHASE A CT
■
9
W2 PHASE B CT
■
10
W2 PHASE C CT
■
11
W2 GND
T
■
12
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