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ELECTRICAL INSTALLATION
POWER SUPPLY +
POWER SUPPLY -
CHASSIS GND
TRIP N/O
1
2
TRIP COM
TRIP OPTV
3
4
CLOSE N/O
CLOSE COM
5
6
CLOSE OPTV
AUX 3 N/C
7
8
AUX 3 COM
AUX 3 N/O
9
AUX 4 N/C
10
AUX 4 COM
1 1
AUX 4 N/O
12
AUX 5 N/C
13
AUX 5 COM
14
AUX 5 N/O
15
AUX 6 N/C
16
AUX 6 COM
17
AUX 6 N/O
18
CRIT FAIL N/C
19
CRIT FAIL COM
20
CRIT FAIL N/O
21
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
2–28
Figure 2-32: 350 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).
•
The uncovered communications cable shield connected to the common terminal
should not exceed 1" (2.5 cm) for proper EMC shielding of the communications cable.
•
Minimum suggested temperature rating for the conductors is 75C.
•
Wire type: copper
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. When the connections
adhere to this drawing, the arrow shows the direction of power flow for positive watts and
the positive direction of lagging vars. The phase sequence is user programmable for either
ABC or ACB rotation.
INPUT 1
1
INPUT 2
2
INPUT 3
3
INPUT 4
4
INPUT 5
5
INPUT 6
6
INPUT 7
7
INPUT 8
8
INPUT 9
9
INPUT 10
10
INPUT COM
1 1
CHASSIS GND
12
PHASE A CT
5
PHASE B CT
6
PHASE C CT
7
GND CT
8
PHASE A VT
9
PHASE B VT
10
PHASE C VT
1 1
AUX VT
12
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
350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 2: INSTALLATION
PHASE A CT
5
PHASE B CT
6
PHASE C CT
7
GND CT
8
PHASE A VT
9
PHASE B VT
10
PHASE C VT
1 1
AUX VT
12
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