GE SR345 Instruction Manual page 168

S2 SYSTEM SETUP
Transformer
Type
2W External
Correction
Y/y180°
Y/d150°
Y/d330°
D/d60°
D/d180°
6–56
Courtesy of NationalSwitchgear.com
TRANSFORMER TYPES
A complete table of two-winding transformer types is shown below.
Table 1: Transformer types
Wdg. Connection Voltage Phase
Phasors Shift
(Φ
1 WYE (gnd 1/2) 0°
2 WYE (gnd 2/3) 0°
0°
1 WYE (gnd 1/2) 180° lag
2 WYE (gnd 2/3) 0°
180° lag
1 WYE (gnd 1/2) 150° lag
2 DELTA (gnd 2/ 0°
3) 150° lag
1 WYE (gnd 1/2) 330° lag
2 DELTA (gnd 2/ 0°
3) 330° lag
1 DELTA (gnd 1/ 60° lag
2)
2 DELTA (gnd 2/ 0°
3) 60° lag
1 DELTA (gnd 1/ 180° lag
2)
2 DELTA (gnd 2/ 0°
3) 180° lag
Transformer Wdg. Connection
Type
)
comp
Y/y0° 1 WYE (gnd 1/2)
2 WYE (gnd 2/3)
0°
Y/d30° 1 WYE (gnd 1/2)
2 DELTA (gnd 2/
3) 30° lag
Y/d210° 1 WYE (gnd 1/2)
2 DELTA (gnd 2/
3) 210° lag
D/d0° 1 DELTA (gnd 1/
2)
2 DELTA (gnd 2/
3) 0°
D/d120° 1 DELTA (gnd 1/
2)
2 DELTA (gnd 2/
3) 120° lag
D/d240° 1 DELTA (gnd 1/
2)
2 DELTA (gnd 2/
3) 240° lag
345 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 6: SETPOINTS
Voltage Phase
Phasors Shift
(Φ )
comp
0°
0°
30° lag
0°
210° lag
0°
0°
0°
120° lag
0°
240° lag
0°