Product Description

A power transformer is a core piece of equipment in a power system, responsible for voltage transformation and power transmission. It is typically installed in power plant step-up substations, hub substations, and large user base main step-down substations, transforming the generator output voltage or the voltage of the upstream power grid to a voltage level suitable for downstream transmission or distribution. TSTY provides 66kV, 110kV, and 220kV power transformers.

66kV Power Transformer

 

66kV transformers belong to the category of high-voltage power transformers and are mainly used in power transmission and distribution networks at the 66kV voltage level. Their rated frequency is 50Hz, and their capacity ranges from 2000kVA to 100MVA.

In terms of capacity level, 66kV transformers mainly serve the following roles:

Below 30MVA: Main transformers for small and medium-sized substations, main step-down transformers for industrial users;

30MVA~63MVA: Main transformers for urban substations, main step-down transformers for large industrial users;

63MVA~75MVA: Main transformers for large substations, main transformers for new energy step-up substations;

 

Rated capacity        
(kVA)

high Voltage        
(kV)

Tap range

low voltage        
(kV)

Connection Group

No-load loss        
(kW)

Load loss        
(kW)

No-load current        
(%)

Impedance voltage(%)

2000

60        
63        
66

±8×1.25%

6.3        
6.6        
10.5        
11

YNd11

1.8

14.7

0.3

8.0

2500

2.1

17.4

0.3

3150

2.4

20.7

0.3

4000

3.1

24.6

0.3

5000

3.7

27.6

0.3

6300

4.4

30.8

0.3

9.0

8000

5.3

36.5

0.3

10000

6.2

43.0

0.3

12500

7.4

51.1

0.3

16000

8.9

62.8

0.3

20000

10.6

76.1

0.3

25000

12.5

90.0

0.3

31500

14.8

108.0

0.3

40000

17.7

126.9

0.3

50000

20.9

150.3

0.3

63000

24.7

178.2

0.3

75000

28.2

203.1

0.3

90000

32.3

232.9

0.3

100000

34.9

252.0

0.3

110kV Main Transformer

 

The 110kV main transformer is the most common voltage level in urban power grids and industrial user substations, and it also serves as a watershed in the power system's transmission and distribution network. Common 110kV power transformer capacities include: 6300kVA, 8000kVA, 10000kVA, 12500kVA, 16000kVA, 20000kVA, 25000kVA, 31500kVA, 40000kVA, 50000kVA, and 63000kVA.

S18-6300~180000/110kV Oil-Immersed Transformer

Rated Capacity(kVA)

Voltage Combination

Vector Group

No-Load Loss (kW)

Load Loss     
(kW) (75℃)

No-Load Current (%)

Impedance (%)

High Voltage (kV)

Tapping Range

Low Voltage (kV)

6300

110     
115     
121

±2x2.5%

6.3     
6.6     
10.5

YNd11

5.90

33

0.62

10.5

8000

7.10

40

0.62

10000

8.40

48

0.58

12500

9.90

56

0.58

16000

12.00

69

0.54

20000

14.10

84

0.54

25000

16.60

99

0.50

31500

19.70

117

0.48

40000

23.50

141

0.45

50000

28.20

166

0.42

63000

33.30

198

0.38

75000

13.8     
15.75     
18     
21

37.80

224

0.33

12~14

90000

43.50

258

0.30

120000

54.20

320

0.27

150000

64.10

379

0.24

180000

72.00

434

0.20

 

S20-6300~180000/110kV Oil-Immersed Transformer

Rated Capacity(kVA)

Voltage Combination

Vector Group

No-Load Loss (kW)

Load Loss     
(kW) (75℃)

No-Load Current (%)

Impedance (%)

High Voltage (kV)

Tapping Range

Low Voltage (kV)

6300

110     
115     
121

±2x2.5%

6.3     
6.6     
10.5

YNd11

4.80

32

0.62

10.5

8000

5.80

38

0.62

10000

6.80

45

0.58

12500

8.10

53

0.58

16000

9.80

65.7

0.54

20000

11.40

79

0.54

25000

13.50

94

0.50

31500

16.00

111

0.48

40000

19.10

133

0.45

50000

22.90

158

0.42

63000

27.00

187

0.38

75000

13.8     
15.75     
18     
21

30.70

212

0.33

12~14

90000

35.40

245

0.30

120000

44.10

303

0.27

150000

52.10

359

0.24

180000

58.50

411

0.20

220kV Main Transformer

 

The 220kV main transformer is the core equipment of a regional power grid, widely used in urban hub substations, large industrial users, and new energy booster stations. Common single-unit main transformer capacities in power systems are 120MVA, 150MVA, 180MVA, and 240MVA.

S18-220KV 31500KVA-240000KVA Power Transformer

Rated Capacity (KVA)

Voltage Combination and Tapping Range

Vector Group

No Load Loss (KW)

Load Loss (KW)

No Load Current (%)

Capacity Allocation (%)

Impedance (%)

HV (KV)

MV (KV)

LV(KV)

31500

220±8x1.25%  230±8x1.25%

69     115     121

6.3    
6.6    
10.5    
21    
36    
37    
38.5

YNyn0d11

28

145

0.77

100/100/100    
100/50/100    
100/100/50

HV-MV    
12-14    
HV-LV    
22-24    
MV-LV    
7-9

40000

33

174

0.73

50000

38

205

0.74

63000

45

244

0.69

90000

10.5    
21    
36    
37    
38.5

58

315

0.54

120000

74

390

0.54

150000

86

463

0.48

180000

99

568

0.48

240000

120

704

0.43

S22-220KV 31500KVA-240000KVA Power Transformer

Rated Capacity (KVA)

Voltage Combination and Tapping Range

Vector Group

No Load Loss (KW)

Load Loss (KW)

No Load Current (%)

Impedance (%)

HV (KV)

LV (KV)

31500

220±8x1.25%    
230±8x1.25%

6.3    
6.6    
10.5    
21    
36    
37    
38.5

YNd11

20

115

0.48

12-14

40000

23

134

0.5

50000

28

161

0.45

63000

33

188

0.45

90000

42

246

0.38

120000

10.5    
21    
36    
37    
38.5

51

304

0.38

150000

60

360

0.35

180000

70

413

0.32

120000

66    

69

53

303

0.38

150000

62

355

0.37

180000

73

406

0.32

240000

91

504

0.25

TSTY's Advantages

 

TSTY Electric Co., Ltd is a national high-tech enterprise with a history of more than 30 years, focusing on the intelligent manufacturing of power transmission and distribution equipment. It mainly deals in oil-immersed, dry-type transformers, box-type substations, high and low voltage switchgear and have obtained ISO 9001, CCC, CE, IEC, UL,GOST and other certifications, 158 patents, and are exported to more than 100 countries.  

Factory scale: 250,000 square meters of park, 15 production lines (including 3 intelligent lines), equipped with 220+ intelligent equipment.  

Production capacity efficiency: annual production capacity:25000 units transformer+ 10000 HV LV switchgear, product qualification rate> 99.8%.

Project Case

 

TSTY products are exported to more than 100 countries and regions, serving power projects in various regions.

TSTY VS Others

 

Process

TSTY Approach

Conventional Practice

Bolt Material

Stainless-steel bolts · Prevent corrosion-related seizure

Standard galvanized bolts · May seize after years of exposure

Corner Treatment

Rounded corners · Improved coating adhesion

Sharp corners retained · Greater risk of coating peeling

Surface Pretreatment

Shot blasting + pickling + phosphating

Basic grinding or direct painting

Coating System

C5-class electrostatic powder coating · 150 μm · >1,000 h salt-spray resistance

Conventional paint · 90–100 μm

Lifting Protection

Rubber protective sleeves · Damage-free handling and delivery

Wire ropes in direct contact · Risk of impact and coating damage

 

Certificates

 

All TSTY transformer products have passed CE, UL,IEC, SGS, GOST and other certifications.