GE 745 Instruction Manual page 111

CHAPTER 5: SETPOINTS
Transformer Wdg. Connection
type
Y/y0°/d30° 1
2
3
Y/y0°/d210° 1
2
3
Y/y180°/d30° 1
2
3
Y/y180°/ 1
d210°
2
3
Y/d30°/y0° 1
2
3
745 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
Table 5–1: Transformer types (Sheet 3 of 11)
Voltage Phase
phasors shift
WYE
WYE
0°
DELTA
30° lag
WYE 210°
WYE 210°
0°
DELTA
210° lag
WYE
WYE 210°
180° lag
DELTA
30° lag
WYE 210°
WYE
180° lag
DELTA
210° lag
WYE 30° lag
DELTA
30° lag
WYE 30° lag
0°
Transformer Wdg.
type
30° Y/y0°/d150°
lag
30°
lag
0°
Y/y0°/d330°
lag
lag
0°
30° Y/y180°/
lag d150°
lag
0°
Y/y180°/
lag d330°
30°
lag
0°
Y/d30°/y180°
0°
AUTO-CONFIGURATION
Connection Voltage
phasors
1 WYE
2 WYE
0°
3 DELTA
150° lag
1 WYE
2 WYE
0°
3 DELTA
330° lag
1 WYE
2 WYE
180° lag
3 DELTA
150° lag
1 WYE
2 WYE
180° lag
3 DELTA
330° lag
1 WYE
2 DELTA
30° lag
3 WYE
180° lag
Phase
shift
150°
lag
150°
lag
0°
330°
lag
330°
lag
0°
150°
lag
330°
lag
0°
330°
lag
150°
lag
0°
30° lag
0°
210° lag
5–15