Your Professional Oil Transformer Supplier
Zhejiang GangHeng Electric Co., Ltd., founded in 2004, is a manufacturer of high- and low-voltage switchgear and transformers. Our team covers R&D, production, and quality control, with stable technical staff and experienced engineers. The factory is located in Jiangshan City, Zhejiang, in a major transport hub that supports fast delivery. We operate modern production lines with CNC punching, CNC bending, and laser cutting machines, along with dedicated copper busbar and testing equipment.
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Our S13 series three-phase oil immersed transformers feature a three-dimensional triangular core structure and new insulation design. With their high efficiency, energy-saving, -
Utilizing high-magnetic, low-loss silicon steel, this product boasts significant advantages in high efficiency, high reliability, and low loss, with an operational lifespan of
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The 35kV Double Winding Load Regulating Oil-Immersed Power Transformer. Manufactured in strict compliance with international and national standards, it features high efficiency,
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Utilizing a new insulation structure and high-permeability silicon steel, it not only ensures excellent short-circuit withstand capability but also achieves superior performance
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Rated voltage: 6kV- 11kV. Rated capacity: 100kva-6300kVA. Application scenarios: Power distribution places such as industrial and mining enterprises, agriculture, and civil
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This transformer serves as an economical, reliable, and highly efficient power core for industrial, commercial, and residential distribution systems.
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Our company’s S20 series Oil-Immersed Distribution Transformer features a new insulation structure and high-quality materials, delivering excellent short-circuit resistance and
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• Attributes: S(B)H15-M series, three-phase, 50Hz, 10kV, sealed oil-immersed amorphous alloy distribution transformer.. • Role: Performs voltage conversion in the distribution
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The 35KV oil immersed transformer is a cutting-edge product that has undergone significant improvements in design, materials, structure, and process. Its structure is sturdy and
Why choose us
Certifications
We are ISO9001、 ISO14001 、OHSAS18001、CQC product certification, high-voltage cabinet type test report and various patent certificates, etc.
Production Market
Our The products are sold to various provinces across the country as well as to countries such as Iran, Kyrgyzstan, Zimbabwe, and Tanzania
Custom Solutions
We offer tailored solutions for OEM/ODM projects. Whether adapting our switchgear or transformers for specific needs, our CNC production equipment ensures precise customization.
After-Sales Support & Warranty
We stand behind our products with a 1-year free warranty and 5-year latent defect coverage, ensuring long-term reliability. In case of technical issues, we provide on-site support and take full responsibility for any technical guidance errors, giving customers peace of mind throughout the product's lifecycle.
S11-M Oil Immersed Power Transformer
S11-M Oil Immersed Power Transformer adopts a new insulation structure to improve the short-circuit resistance, the core is made of high-quality cold-rolledsilicon steel sheet, the high-voltage and low-voltage windings are made of oxygen free copper wires and adopt multi-layer cylindrica structure; all fasteners adopt special anti-loosening treatment.The product has the characteristics of high efficiency and low loss, can save a lot of power consumption and operating costs, andhas significant social benefits, it has been widely used in power plants, substations, industrial and mining enterprises, ports, airportsand other places.
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Main Technical Data For 10kV Level, S13-, S20-, S22-M Series Three-Phase Oil-Immersed Distribution Transformers |
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Rated Power (kVA) |
HV Voltage (kV) |
H.V.Tap (kVA) |
LV Voltage (kV) |
Connection Symbol |
Short-Circuit Impedance (%) |
No-Load Loss (W) |
Load Loss (W) |
No-Load Current (%) |
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|
The S13 type |
The S20 type |
The S22 type |
The S13 type |
The S20 type |
The S22 type |
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|
30 |
6 |
±5% |
0.4~1.0 |
Dyn11 |
4 |
80 |
70 |
65 |
630 |
505 |
455 |
1.2 |
|
50 |
100 |
90 |
80 |
910 |
730 |
655 |
1.04 |
|||||
|
63 |
110 |
100 |
90 |
1090 |
870 |
785 |
0.96 |
|||||
|
80 |
130 |
115 |
105 |
1310 |
1060 |
945 |
0.96 |
|||||
|
100 |
150 |
135 |
120 |
1580 |
1265 |
1140 |
0.88 |
|||||
|
125 |
170 |
150 |
135 |
1890 |
1510 |
1360 |
0.88 |
|||||
|
160 |
200 |
180 |
160 |
2310 |
1850 |
1665 |
0.80 |
|||||
|
200 |
240 |
215 |
190 |
2730 |
2185 |
1970 |
0.80 |
|||||
|
250 |
290 |
260 |
230 |
3200 |
2560 |
2300 |
0.72 |
|||||
|
315 |
340 |
305 |
270 |
3830 |
3065 |
2760 |
0.72 |
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|
400 |
410 |
370 |
330 |
4520 |
3615 |
3250 |
0.64 |
|||||
|
500 |
480 |
430 |
385 |
5410 |
4330 |
3900 |
0.64 |
|||||
|
630 |
4.5 |
570 |
510 |
460 |
6200 |
4960 |
4460 |
0.48 |
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|
800 |
700 |
630 |
560 |
7500 |
6000 |
5400 |
0.48 |
|||||
|
1000 |
830 |
745 |
665 |
10300 |
8240 |
7415 |
0.48 |
|||||
|
1250 |
970 |
870 |
780 |
12000 |
9600 |
8640 |
0.40 |
|||||
|
1600 |
1170 |
1050 |
940 |
14500 |
11600 |
10440 |
0.40 |
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|
2000 |
5 |
1360 |
1225 |
1085 |
18300 |
14640 |
13180 |
0.32 |
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|
2500 |
1600 |
1440 |
1280 |
21200 |
16960 |
15270 |
0.32 |
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Corrosion-Resistant Material Technology: With a corrosion-resistant steel body and oil-immersed cooling system, ensure long-term durability and efficient heat dissipation in harsh industrial environments.
Modular Interactive Design: With a quick-access front panel and modular components, streamline maintenance and reduce downtime by up to 30% compared to traditional designs.
High-Efficiency Performance: With S11-M energy efficiency technology, achieve up to 98% efficiency, reducing energy losses by ~15% versus older S10 models.
Heavy-Duty Scenario Solutions: Designed for continuous operation at 5MW capacity, support uninterrupted power demands in commercial facilities compared to lower-rated alternatives.
Complies with IEC 60076 safety and performance standards, ensuring reliable operation under rigorous industrial conditions.
Advantages of S11-M Oil Immersed Power Transformer
Energy Saving: The S11 model has lower no-load losses, load losses, and operating costs.
High Operational Reliability: Improvements have been made to the sealing components of the fuel tank to increase reliability and improve the level of craftsmanship to ensure the reliability of the seal.
Long Service Life: The transformer oil tank adopts a fully sealed structure, and the oil tank can be connected to the tank edge with bolts. The transformer oil does not come into contact with air, which extends its service life.
Small Footprint: The S9-M and S11-M series transformer oil tanks use corrugated plate radiators. When the oil temperature changes, the corrugated plate expands and contracts, which can replace the role of the oil storage tank. The corrugated plate oil tank has a beautiful appearance and a small footprint.
Application of S11-M Oil Immersed Power Transformer
Urban & Rural Power Networks
6kV/10kV models for rural grid upgrades and city distribution; 20kV/22kV units for new urban power grids, supporting voltage transformation from medium to low voltage.
Industrial Power Systems
Suitable for metallurgy, petrochemical, and manufacturing plants. Handles large motor loads and fluctuating currents without overheating or insulation breakdown.
Renewable Energy Plants
10–22kV units are widely used in solar PV and wind power substations, supporting both collection and step-up circuits to maximize energy conversion efficiency.
Infrastructure & Engineering Projects
Supports hydropower, mining, and railway traction applications, ensuring stable performance in high-humidity or shock-prone environments.
Structure of S11-M Oil Immersed Power Transformer
Core
Uses high-quality cold-rolled grain-oriented silicon steel sheets, with 45° four-level fully oblique joints, no punching, and the core column is cured with polyurethane varnish. The seamless core significantly reduces no-load loss and no-load current, lowering the no-load current by 60%~80%.
Windings
High and low voltage coils are continuously wound on the core column, resulting in compact windings with good concentricity. The coils use oxygen-free copper wire, and the low-voltage coil has a foil winding structure, improving its resistance to sudden short circuits. Increased effective support at the winding end faces further enhances the winding's short-circuit resistance.
Tank
Utilizes a corrugated tank design. The corrugated sheets have a breathing function, expanding and contracting with the transformer oil volume, replacing the traditional oil conservator structure. The corrugated tank isolates the transformer oil from the external environment, preventing and slowing oil deterioration and insulation moisture absorption, enhancing operational reliability, and achieving maintenance-free operation.
Safety Precautions and Emergency Measures
Personnel Operation Safety
During inspections or operations, insulated shoes and safety helmets must be worn. A safe distance (≥0.7 meters for 10kV) must be maintained when approaching live parts (such as conduit wiring). Climbing oil tanks or oil conservatories is prohibited. When taking oil samples, a dedicated sampling bottle must be used. Static electricity must be discharged before operation to avoid sparks generated by metal tool collisions.
Electric Shock Treatment
If someone comes into contact with a live conductor, immediately disconnect the power supply. Use an insulated rod to pry the wire away. Do not attempt rescue with bare hands. After the injured person is removed from the power source, follow the emergency medical procedures for electric shock.
Certificates
FAQ
As one of the most reliable oil transformer manufacturers and suppliers in China, we cover all costs, risks, and your direct expenses. Please feel free to buy high quality oil transformer at competitive price from our factory. Customized orders are welcome.
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