220kV triple-winding on-load voltage regulation autotransformer

Rated capacity (kVA)

Voltage combination and tap range (kV)

Bonding group

No-load loss (kW)

Load loss (kW)

Short circuit impedance (%)

No-load current (%)

High pressure

Medium pressure

Low pressure

31500

220±8 ×1.25%

115

121

6.3

6.610.5

11

35

37

38.5

YNyn0d11

25

108

High-Low

H-L

28-34

High-Medium

H-M

8 to 10

Medium-Low

M-L

18 to 24

0.56

40000

30

132

0.56

50000

36

157

0.49

63000

42

189

0.49

90000

51

247

0.42

120000

10.5

11

35

37

38.5

64

308

0.42

150000

76

365

0.35

180000

85

419

0.35

240000

104

540

0.30