Phase Sequence And Transformer Polarity - GE Multilin 350 Series Instruction Manual

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

Phase sequence and transformer polarity

2–10
Courtesy of NationalSwitchgear.com
Figure 11: 350 Terminal Identification
POWER SUPPLY +
1
CHASSIS GND
2
TRIP N/O
3
CLOSE N/O
4
CLOSE 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. 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
INPUT 2
INPUT 3
INPUT 4
INPUT 5
PHASE A CT
INPUT 6
PHASE B CT
INPUT 7
PHASE C CT
INPUT 8
GND CT
RESERVED
PHASE A VT
RESERVED
PHASE B VT
INPUT COM
PHASE C VT
CHASSIS GND
AUX VT
C
350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 2: INSTALLATION
F
1
IRIG-B +
2
IRIG-B -
3
RS485 +
4
RS485 -
5
RS485 COM
6
CHASSIS GND
7
RESERVED
8
RESERVED
■
5
PHASE A CT
■
6
PHASE B CT
■
7
PHASE C CT
■ 8
GND CT
■
9
PHASE A VT
■ 10
PHASE B VT
11
■
PHASE C VT
12
■
AUX VT
D E