GE 345, Быстрый старт

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28 345 TRANSFORMER PROTECTION SYSTEM – QUICKSTART GUIDE
ELECTRICAL INSTALLATION CHAPTER 2: INSTALLATION
Figure 2-16: Terminal Identification - Non-drawout
Wire range
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
2
to 0.3 mm
2
): Single wire termination with/without
9.53 mm (0.375”) maximum diameter ring terminals.
• 14 AWG to 22 AWG (2.1 mm
2
to 0.3 mm
2
): Multiple wire termination with matching
wire sizes and stranding. Two wires maximum per circuit.
• 14 AWG to 22 AWG (2.1 mm
2
to 0.3 mm
2
): Multiple wire termination with 9.53 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).
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.
Current inputs
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.
CAUTION:
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.
CAUTION:
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.
INPUT 1
INPUT 2
INPUT 3
INPUT 4
INPUT 5
INPUT 6
INPUT 7
INPUT 8
INPUT 9
INPUT 10
INPUT COM
CHASSIS GND
1
2
3
4
5
6
7
8
9
10
11
12
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
&
T
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
&
T
■
■
■
■
■
■
■
■
5
6
7
8
9
10
11
12
POWER SUPPLY -
POWER
CHASSIS GND
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
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
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
IRIG-B +
IRIG-B -
RS485 +
RS485 -
RS485 COM
CHASSIS GND
RESERVED
RESERVED
1
2
3
4
5
6
7
8
5
6
7
8
9
10
11
12