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11kV Oil Immersed Power Transformer for Outdoor Use
Oil-Immersed Transformer
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11kV Oil Immersed Power Transformer
11kV Oil Immersed Power Transformer
11kV Oil Immersed Power Transformer

11kV Oil Immersed Power Transformer for Outdoor Use

S13-M Series Three-Phase Oil-Immersed Transformers, Product Overview, The S13-M series of three-phase oil-immersed transformers offer exceptional efficiency and energy savings, expertly designed with a fully sealed corrugated tank structure. This innovative design accommodates changes in temperature and volume of transformer oil due to load fluctuations and environmental temperature variations. The result is not only a visually appealing product with a compact footprint but also significant economic advantages, Compared to GB/T 6451 standards, S13-M transformers deliver impressive performance improvements, featuring an average reduction of 45% in no-load losses and 35% in load losses. These enhancements translate to a 30% decrease in operating costs, reinforcing the S13-M series as a sustainable choice for critical infrastructure projects that demand high efficiency and long-lasting durability

  • S13 Series 11Kv Guoxiang Electric Power
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product details

Model Definition

product-description1-4-2

Features

● Voltage level: 10～35/0.4kV.
● Capacity: 30～3150kVA.
● Extended Lifespan & Maintenance-Free Operation:
Fully sealed design with bolted or welded tank cover-to-frame connections eliminates oil-air contact, preventing moisture ingress and significantly reducing insulation aging. This extends service life while enabling maintenance-free operation.
● Compact Design & Low Noise:
Utilizes advanced materials and manufacturing techniques to minimize operational noise. The oil conservator-free structure reduces overall height compared to conventional units. Lifetime oil retention eliminates the need for mid-life oil changes, enhancing in-service safety and reliability.
● Space-Efficient Corrugated Tank:
The S11 series features corrugated tank walls that provide natural cooling through thermal expansion and contraction. This design optimizes footprint while maintaining aesthetic appeal.
● Coreless Maintenance & Oil Purity:
Vacuum-filtered oil injection during assembly removes all moisture, ensuring long-term dielectric integrity. Hermetic sealing prevents oxygen ingress, eliminating oxidation risks and preserving insulation performance throughout the transformer’s lifecycle.
  • product-description2
  • product-description3
  • product-description4

Range of application

Widely applicable to high-rise buildings, commercial centers, subways, airports, railway stations, industrial and mining enterprises, drilling platforms, and oil production platforms. Specifically suitable for locations with strict fire-prevention requirements (such as flammable/explosive zones) and harsh environments. Also ideal for power supply and lighting in residential areas, commercial streets, industrial sites, and rural communities.

Technical specifications

Rated capacity (kVA)

Rated voltage

Vector group

No-load loss (W)

Load loss (W)

No-load current (%)

Impedance voltage (%)

HV (kV)

Tapping range (%)

LV (kV)

11#

13#

20#

22#

11/13#

20#

22#

11#

13#

20#

22#

30

6 6.3 6.6 10 10.5 11

±5 or ±2×2.5

0.4

Dyn11 or Yyn0

100

80

70

65

630/600

505/480

455/430

0.3

0.3

0.24

0.23

4

50

130

100

90

80

910/870

730/695

655/625

0.24

0.23

0.24

0.23

80

180

130

115

105

1310/1250

1050/1000

945/900

0.22

0.18

0.21

0.20

100

200

150

135

120

1580/1500

1265/1200

1140/1080

0.21

0.16

0.21

0.20

125

240

170

150

135

1890/1800

1510/1440

1360/1295

0.2

0.15

0.19

0.18

160

280

200

180

160

2310/2200

1850/1760

1665/1585

0.19

0.14

0.18

0.17

200

340

240

215

190

2730/2600

2185/2080

1970/1870

0.18

0.12

017

0.16

250

400

290

260

230

3200/3050

2560/2440

2300/2195

0.16

0.12

0.14

0.13

315

480

340

305

270

3830/3650

3065/2920

2760/2630

0.16

0.11

0.13

0.12

400

570

410

370

330

4520/4300

3615/3440

3250/3095

0.16

0.11

0.13

0.12

500

680

480

430

385

5410/5150

4330/4120

3900/3710

0.16

0.1

0.12

0.11

630

810

570

510

460

6200

4960

4460

0.15

0.09

0.12

0.11

4.5

800

980

700

630

560

7500

6000

5400

0.15

0.09

0.1

0.1

1000

1150

830

745

665

10300

8240

7415

0.14

0.09

0.1

0.09

1250

1360

970

870

780

12000

9600

8640

0.13

0.08

0.1

0.09

1600

1640

1170

1050

940

14500

11600

10440

0.12

0.07

0.09

0.08

2000

1940

1360

1225

1085

18300

14640

13180

0.11

0.09

0.09

0.08

5.5

2500

2290

1600

1440

1280

21200

14840

13360

0.11

0.08

0.09

0.08

3150

2750

2180

24100

0.11

0.08

6
Note: 
1. The load loss with two values in the table, the value on the left is applicable to the Dyn11 vector group, and the value on the right is applicable to the Yyn0 vector group.
2. The above data is subject to change due to technical improvement.

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