220kV Class 31500kVA ~ 300000kVA Three-phase Triple-winding Off-circuit Tap Changer Power Transformer

Rated capacity (kVA)

Voltage combination and tap range

Bonding Group Label

Level 1 Energy Efficiency

Level 2 Energy Efficiency

Level 3 Energy Efficiency

Short circuit impedance (%)

High voltage and tap range (kV)

Medium voltage (kV)

Low voltage (kV)

No-load loss (kW)

Load loss (kW)

No-load loss (kW)

Load loss (kW)

No-load loss (kW)

Load loss (kW)

Step-up

Step-down

31500

220±2 × 2.5%

230±2 × 2.5%

242±2 × 2.5%

69

115

121

6.3

6.6

10.521

36

37

38.5

YNyn0d11

18

138

21

138

26

145

High-Medium 22~24

High-Low 12~14

Medium-Low 7~9

High-Medium 12~14

High-Low 22-24

Medium-Low

7 to 9

40000

21

165

25

165

30

174

50000

24

194

29

194

35

205

63000

29

231

34

231

42

244

90000

10.513.821

36

37

38.5

37

300

44

300

54

316

120000

46

369

55

369

67

390

150000

10.5

13.8

15.75

21

36

37

38.5

55

438

65

438

80

463

180000

62

500

73

500

90

527

240000

72

616

91

616

112

650

300000

91

726

108

726

133

767

Note: 1. The capacity allocation of load loss in the table is (100/100/100%, and the capacity allocation of boost structure is (100/50/100)%; The capacity allocation of buck structure can be (100/100/50% or (100/100)%;

2. Transformers with various special parameters and performance can be manufactured according to user requirements.