GE 745 - 5.2.6 Transformer Types

CHAPTER 5: SETPOINTS AUTO-CONFIGURATION
745 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–13
5.2.6 Transformer Types
A complete table of transformer types is shown below.
Table 5–1: Transformer types (Sheet 1 of 11)
Transformer
type
Wdg. Connection Voltage
phasors
Phase
shift
Transformer
type
Wdg. Connection Voltage
phasors
Phase
shift
2W External
Correction
1WYE
(gnd 1/2)
0° Y/y0° 1 WYE
(gnd 1/2)
0°
2WYE
(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
2WYE
(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
2DELTA
(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°
2DELTA
(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
2DELTA
(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
2DELTA
(gnd 2/3)
180° lag
0° 2 DELTA
(gnd 2/3)
240° lag
0°
D/d300° 1 DELTA
(gnd 1/2)
300°
lag
D/y30° 1 DELTA
(gnd 1/2)
0°
2DELTA
(gnd 2/3)
300° lag
0° 2 WYE
(gnd 2/3)
30° lag
330°
lag