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