220kV level capacity: 31500kV·A~240000kV·A three-phase three-winding on-load voltage regulating power transformer

Rated capacity kV · A

Voltage combination level grading range

Bonding Group Label

No-load loss kW

Load loss kW

No-load current %

Short circuit impedance %

High pressure classification range kV

Medium Voltage kV

Low voltage kV

31500

220±8×1.25%

230±8×1.25%

69

115

121

6.3

6.6

10.5

21

36

37

38.5

Ynyn0d11

19

138

0.63

High-Medium12 to 14

High-Low22-24

Medium-low7-9

40000

23

165

0.6

50000

26

194

0.6

63000

31

231

0.55

90000

40

300

0.44

120000

10.5

21

36

37

38.5

51

369

0.44

150000

59

438

0.39

180000

68

538

0.39

240000

85

667

0.35

Note 1: The data listed in the table are applicable to step-down structure products, and step-up structure products can also be provided as required.

Note 2: Low voltage 35kV transformers are also available upon request.

Note 3: When the annual average load rate of the transformer is between 45% and 50%, the highest operating efficiency can be obtained by using the loss values in the table.