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Oil Immersed Transformer

Your Professional Oil Immersed Transformer Supplier

 

Gnee Steel (Tianjin) Co., Ltd. was established in Anyang, Henan, in 2008. Our main products include galvanized steel plates, cold-rolled steel plates, pre-coated steel plates, steel pipes, PPGI, PPGL, PPAL, color-coated steel plates, pre-processed steel plates, coil steel, galvanized processing parts, and other related products.

 

Certifications
We have successfully passed ISO, CE, and other system certifications. Additionally, our products have been tested and approved by SGS, TUV, BV, and other leading testing organizations.

 

Our Strengths
To date, Gnee Steel has made a total investment of over 60 million yuan. The company’s factory covers nearly 40,000 square meters, with a storage capacity of 250,000 tons. We are equipped with 5 advanced slitting units and 3 horizontal shearing units, all of which feature intelligent operation, automation, and high precision in processing.

 

Sales Market
We primarily export our products to four key regions: South America (35% of exports), Africa (25%), the Middle East (20%), and Southeast Asia (20%).

 

 
 

Oil Immersed Transformer

 

 

Oil immersed transformer ,use Japanese Toshiba analysis soft ware and our company special calculation and validation procedures to make sure the performance of products. Superior process equipment ,elaborate material selecting and efficient manufacturing make the transformer have small volume,light weight,low loss,low partial discharge,low noise characteristics.
The product is stable,reliable,economic, environmental protection.It can be applied to many places such as power plants,transformer substation ,large industrial mining and petrochemical enterprise and so on.

 

Rated Capacity
KVA

Voltage Combination

Connection Symbol

Off-load Loss(W)

On-load Loss(W)
(75ºC)

Short Circuit Impendance(%)

Impendance
(%)

Weight(KG)

Dimensions(mm)

High Voltage
(KV)

Tapping Range
(%)

Low
Voltage
(KV)

Oil

Total

Length

Width

Height

30

6
6.3
10
10.5
11

±5

±2×2.5

0.38
0.4
0.415
0.433

Dyn11
Yyn0

90

600

2.1

4

60

285

715

595

800

50

120

870

2

65

360

760

610

830

63

140

1040

1.9

100

500

1080

620

1090

80

170

1250

1.8

80

455

975

640

880

100

200

1500

1.6

90

525

970

640

910

125

235

1800

1.5

95

580

1050

700

940

160

280

2200

1.4

110

680

1160

785

960

200

335

2600

1.3

125

765

1125

770

1000

250

390

3050

1.2

140

860

1200

835

1020

315

465

3650

1.1

155

1005

1305

910

1050

400

560

4300

1.0

175

1170

1305

900

1090

500

670

5100

1.0

210

1370

1410

1015

1140

630

840

6200

0.9

4.5

260

1700

1545

1095

1160

800

980

7500

0.8

305

2025

1590

1130

1200

1000

1190

10300

0.7

375

2290

1680

1230

1300

1250

1360

12000

0.6

445

2680

1715

1245

1400

1600

1640

14500

0.6

520

3160

1785

1290

1500

2000

1980

18500

0.5

5

785

4020

1850

1315

1530

 

Three Phase Oil Immersed Transformers
 
 

Transformer Adavantage

1 - Low loss, low noise, low partial discharge, low temperature rise and energy-saving
2 - Adopt the latest insulatoin structure
3 - Excellent anti-short-circuit ability.
4 - As to the heat dissipating element adopts corrugated sheet or sheet radiator and other components.
5 - The iron core adopts high quality cold rolled graind oriented silicon steel sheet ,it is low loss and small magnetostriction.The whole iron core adopts the structure of 45-degree full oblique joint and round cross-section, which will not be loosened due to vibration during transportation and operation.

 

Core Advantages

Energy-Efficient Design

Premium Silicon Steel Core

Constructed with brand-new, high-quality silicon steel sheets, our transformers significantly reduce operational losses, minimize energy waste, and operate with low noise levels—providing a quiet and efficient working environment.

High-Quality Winding Materials

Heat-resistant enameled wire ensures excellent conductivity and stability, even under high-load conditions. This reduces line losses and extends the transformer's service life.

Three Phase Oil Immersed Transformers

 

Flexible Customization

Diverse Voltage Configurations

Available in a wide range of high-voltage options (6kV, 6.3kV, 10kV, 10.5kV, 11kV, 20kV, 35kV, etc.) and low-voltage options (0.4kV, 400V, 415V, etc.), our transformers can be tailored to meet specific local requirements.

Multiple Connection Options

Supports various connection types such as Dyn11 and Yyn0, accommodating different electrical system requirements in diverse applications.

 

 

High Reliability and Safety
Oil Immersed Transformer

Wavy Oil Tank Design

The unique corrugated-wall oil tank structure automatically compensates for changes in transformer oil volume due to temperature fluctuations. This eliminates the need for an additional oil conservator, reduces equipment costs, and lowers the overall height of the transformer—saving installation space.

Advanced Safety Devices

Equipped with highly sensitive pressure relief valves and precision thermometer sockets. Optional alarm terminals and gas relays further enhance operational safety.

 

Environmental and Economic Benefits

Eco-Friendly Oil-Immersed Cooling

The oil-immersed cooling system offers excellent heat dissipation and stable performance while minimizing environmental impact.

High Cost-Performance Ratio

Through advanced manufacturing and strict quality control, our transformers deliver high performance at competitive prices—offering a cost-effective solution for power distribution needs.

 

Service condition
 

a) Suitable for indoor or outdoor application
b) Air temperature: Maximum temperature: +40ºC; Minimum temperature:-30ºC
c) Humidity: Monthly average humidity 95%; Daily average humidity 90% .
d) Altitude above sea level: Maximum installation altitude: 2000m.
e) Max wind speed:35M/s
f) Ambient air not apparently polluted by corrosive and flammable gas, vapor etc.
g) No frequent violent shake

Oil Immersed Transformer

 

Oil Immersed Transformer

 

Tests

1, Voltage ratio. Polarity and phase relationship test on each tapping
2, Resistance of all windings
3, No-load current and no-load losses measurement
4, Load losses measurement at rated current and frequency
5, Impedance voltage measurement
6, Induced over-voltage and separate source voltage withstand tests
7, Impulse voltage withstand test.
8, Noise level test
9, Oil leakage test
10, Overload test at 150% rated current for one hour after temperature rise test and hot resistance measurement of (HV - LV)

 

Certificates

 

 

productcate-1-1

 

FAQ

 

Q: Are you a manufacture or a trading company?

A: We are professional transformer and bus-duct manufacture. Support OEM&ODM.

Q: What Certificates or standards do you have?

A: iSO9001-2008, OHSAS18001:2000, ISO4001:2004L, CQC, CNAS

Q: Do you have a MOQ requirement?

A: NO, 1 pc order is welcome

Q: What's the delivery time/Leadtime?

A: Leadtime is 20 workdays after order confirmed by advanced payment.

Q: What's your payment terms?

A: T/T 30% deposit and 70% balance before shipping.

Q: What's the standard of package?

A: Normally we use strong plywood case, Also it can be customized.

Q: How to order?

A: Send us an inquiry with product details. Message and email will be replied in 24 hours.

We're professional oil immersed transformer manufacturers and suppliers in China, specialized in providing high quality customized service. We warmly welcome you to buy cheap oil immersed transformer for sale here and get free sample from our factory. For price consultation, contact us.

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