Product Description
The oil-immersed transformer is a new type of high-performance transformer with a more reasonable structure and better performance. It uses oil as the main insulation medium and relies on oil as the cooling medium, such as oil-cooled self-cooling, oil-cooled air-cooling, oil-cooled water-cooling, and forced oil circulation, etc. The main components of the transformer include the iron core, windings, oil tank, oil reservoir, respirator, explosion-proof tube (pressure release valve), heat sink, insulation bushing, tap changer, gas relay, thermometer, and oil purifier, etc.
Due to the long-term immersion of the silicon steel sheets in the transformer, oil can seep into the interlayers, and the transformer oil has elasticity to act as a buffer. Therefore, the oil-immersed transformer has low noise. However, the voltage regulating switch is inside the oil tank. When adjusting the voltage, the contact condition of the switch cannot be seen outside. If the contact is not good, it is equivalent to a break in that circuit. If the contact is poor, when the load is too large, the switch is prone to burn out.
Transformer normal service conditions
1.The height above the sea level is below 1000m;
2.Highest air temperature +40ºC;
3.Highest daily average air temperature+30ºC;
4.Highest annual average air temperature +20ºC;
5.Lowest outdoor air temperature -25ºC.
(defines in detail when transformer in special service conditions )
Type of cooling
(1) Oil-immersed transformers usually adopt three cooling methods: oil-immersed self-cooling, oil-immersed air-cooling, and forced oil circulation.
The oil-immersed self-cooling method relies on the natural convection of oil to dissipate heat.
(2). The oil-immersed air-cooling method is based on the oil-immersed self-cooling method, and additional fans are added to blow air into the oil tank and oil pipes to enhance the heat dissipation effect. Forced oil circulation uses an oil pump to extract the hot oil from the transformer, cool it outside the transformer, and then send it back into the transformer.
Structure Function
In the main substation of the urban rail transit power supply system, the main transformer usually adopts a three-phase oil-immersed transformer. The oil-immersed transformer mainly consists of the core, windings, oil tank, voltage regulating device, radiator, oil reservoir, gas relay, insulation bushing, explosion-proof tube, etc.
1. Core
The core is composed of silicon steel sheets stacked together with good magnetic conductivity. It forms a magnetic flux closed circuit, and the primary and secondary windings of the transformer are wound on the core.
The transformer core is divided into two structures: core type and shell type. Currently, the widely used transformers are of core type. The core of the core type transformer consists of the core column and the yoke. The core of the oil-immersed transformer has oil channels inside for cooling the core, which facilitates the circulation of transformer oil and also enhances the heat dissipation effect of the equipment.
2. Winding
The winding, also known as the coil, is the conductive circuit of the transformer. It is made by winding copper wire or aluminum wire into multiple layers of cylindrical shapes. The primary and secondary windings are concentrically arranged on the core column and are insulated from each other. The low-voltage winding is usually inside and the high-voltage winding is outside. The insulating material is wrapped around the wire to ensure insulation between the wires and between the wires and the ground.
3. Oil Tank
The oil tank is the outer shell of the oil-immersed transformer. Besides holding oil, it is also used to install other components.
4. Voltage Regulator
The voltage regulator is set up to ensure the stability of the secondary voltage of the transformer. When the power supply voltage fluctuates, the voltage regulator is used to adjust the tap switch of the transformer to ensure the stability of the secondary output voltage. The voltage regulator is divided into on-load voltage regulator and off-load voltage regulator.
5. Radiator
The radiator is installed on the oil tank wall. The upper and lower parts are connected to the oil tank through pipes. When there is a temperature difference between the upper and lower oil temperatures of the transformer, the radiator forms oil convection, and the cooled oil flows back to the oil tank to reduce the temperature of the transformer oil. To improve the cooling effect, measures such as self-cooling, forced air cooling, and forced water cooling can be adopted.
6. Oil Sump
The oil sump is also called the oil tank. Transformer oil will undergo thermal expansion and contraction due to temperature changes, and the oil level will rise or fall accordingly. The function of the oil sump is to provide a buffer for the thermal expansion and contraction of the oil, keeping the oil tank always filled with oil; at the same time, due to the presence of the oil sump, the contact area between the oil and air is reduced, which can slow down the oxidation of the oil.
7. Gas Relay
The gas relay, also known as the gas protection relay, is the main protection device for internal faults of the transformer. It is installed in the middle of the connecting pipe between the oil tank and the oil sump. When a serious fault occurs inside the transformer, the gas relay connects the circuit breaker trip path; when a less serious fault occurs inside the transformer, the gas relay connects the fault signal circuit.
8. Insulation Bushing
The high and low insulation bushings are located on the top cover of the transformer oil tank. For oil-immersed transformers, porcelain insulation bushings are generally used. The insulation bushing's function is to maintain good insulation between the high and low voltage windings leads and the oil tank, and to fix the leads.
9. Explosion-proof Tube
The explosion-proof tube, also known as the safety air passage, is installed on the transformer's oil tank. Its outlet is sealed with a glass explosion-proof membrane. When a serious fault occurs inside the transformer and the gas relay fails, the gas inside the oil tank will break through the glass explosion-proof membrane from the safety air passage and prevent the transformer from exploding.
Our Advantages
1.The insulation performance is excellent, which can reduce the insulation distance and lower the cost.
2.The transformer oil has a low viscosity and good heat transfer performance.
3.It can effectively protect the core and windings from the influence of moisture in the air.
4.It protects the insulating paper and insulating paperboard from the action of oxygen, reduces the aging of insulating materials, and extends the lifespan of the transformer.
5.Low maintenance cost and low noise level
THE STRUCTURE AND ADVANTAGES
The evaporative cooling transformer from Golden Triangle Electric Power Technology Co., Ltd. is a beacon of modern engineering, highlighted by its avant-garde use of a revolutionary liquid insulating medium. This material is nothing short of remarkable, showcasing attributes that are non-flammable, non-explosive, non-toxic, environmentally benign, and efficient. It promises exceptional electrical strength, premium insulation, and top-tier cooling efficiency, granting a plethora of technical benefits. The transformer shines with six distinctive features: Firstly, it offers unmatched fire safety and disaster resilience due to the pioneering wave-state insulation material, which is non-combustible, explosion-resistant, and self-extinguishing, effectively mitigating fire hazards. Secondly, it delivers reduced energy consumption and operates at lower temperatures, thus decreasing transformer load loss while optimizing copper wire usage. Thirdly, it has an impressive overload handling capability, with cutting-edge evaporative cooling technology that mitigates equipment risks from transformer heating, ensuring reliable performance under peak load conditions. Fourthly, it is environmentally considerate, utilizing a non-toxic liquid insulation material that is eco-friendly, operates with minimal noise, and is entirely recyclable at the end of its service life. Fifthly, it maximizes spatial efficiency, with a design that enables over a 30% reduction in substation floor space. Sixthly, it requires virtually no maintenance, with a stable liquid insulation that requires no monitoring or replacement throughout its operational life. Primarily, these transformers are deployed in power distribution within densely populated areas and critical infrastructure, such as residential zones, data centers, transit hubs, and airports. They also play a pivotal role in renewable energy sectors, including wind, ocean, and solar power applications.
Product Parameters
SX22-M-(30-2500)/10 three-phase evaporative cooling transformer
Rated
capacity(kVA) |
High voltage(kV) |
Tap range |
Low voltage(kV) |
connected group label |
No-load
loss(w) |
Load loss
(75ºC)(W) |
No-load current(%) |
| 30 |
6
6.3
6.6
10
10.5
11 |
±2*2.5
±5 |
0.4 |
Dyn11
Yyn0
Yzn11 |
65 |
455/430 |
0.3 |
| 50 |
80 |
655/625 |
0.24 |
| 63 |
90 |
785/745 |
0.23 |
| 80 |
105 |
945/900 |
0.22 |
| 100 |
120 |
1140/1080 |
0.21 |
| 125 |
135 |
1360/1295 |
0.2 |
| 160 |
160 |
1665/1580 |
0.19 |
| 200 |
190 |
1970/1870 |
0.18 |
| 250 |
230 |
2300/2195 |
0.17 |
| 315 |
270 |
2760/2630 |
0.16 |
| 400 |
330 |
3250/3095 |
0.16 |
| 500 |
385 |
3900/3710 |
0.16 |
| 630 |
Dyn11
Yyn0 |
460 |
4960 |
0.15 |
| 800 |
560 |
6000 |
0.15 |
| 1000 |
665 |
8240 |
0.14 |
| 1250 |
780 |
9600 |
0.13 |
| 1600 |
940 |
11600 |
0.12 |
| 2000 |
1085 |
14600 |
0.11 |
| 2500 |
1280 |
16900 |
0.11 |
NOTICE !
Please ensure the following details are provided before placing your order. These details encompass:
1. Prefabricated substation type;
2. Transformer model and capacity;
3. High and low voltage circuit main wiring scheme;
4. Types and parameters of electrical components with special requirements;
5. Shell Color;
6. Names, quantities, and additional requirements for spare parts and components;
Two-year warranty
More than three certifications
15 years of accumulated experience
Packaging & Shipping
Product Recommendation
Company Profile
ABOUT OUR COMPANY
Golden Triangle Power Technology Co., Ltd. (stock name: Golden Triangle, stock code: 837424) emerged in November 2009 as a trailblazer in the power product sector. Expertly navigating the realms of research, development, production, sales, and technical services, the company specializes in groundbreaking innovations such as three-dimensional coil core transformers, amorphous alloy core transformers, and photovoltaic substations, delivering comprehensive solutions. As a production-service-oriented powerhouse, Golden Triangle adeptly integrates construction EPC, catering to varied applications across sectors such as State Grid, Southern Power Grid, railways, mines, infrastructure, metallurgy, roadways, and real estate management.
A symbol of excellence and ingenuity, the company boasts certifications including ISO9001:2015 quality management, ISO14001:2015 environmental management, ISO45001:2008 occupational health and safety, PCCC energy-saving product, national 'CCC' mandatory product, CQC China quality, and an AAA credit rating. Hailed as a national high-tech enterprise and a provincial 'specialized, special, and new' SME, Golden Triangle ranks among the province's top 100 growth-potential tech enterprises and is recognized as a municipal green factory. It features a provincial high-tech research and development center, equipped with an academician workstation, a doctor innovation workstation, alongside 3 invention patents and 51 utility model patents.
Golden Triangle Electric Power Technology Co., Ltd. shines as a beacon of innovation and excellence in the energy sector. Celebrated for its contribution to the 'Energy Saving and People Benefiting Project' and featured in the 'Recommended Catalog of Energy Saving Electromechanical Equipment' by prestigious authorities such as the Ministry of Industry and Information Technology, Ministry of Finance, and the National Development and Reform Commission, our offerings stand as testaments to superior craftsmanship and avant-garde technology. As the trailblazing force in the power industry from Wenzhou, we are privileged to receive direct fiscal support from the Ministry of Finance, underscoring the quality and innovation embedded in our products. Our accolades include recognition as national industrial energy-saving technical equipment products and first-of-their-kind in key provincial equipment manufacturing fields, crowned as provincial excellent new industrial products. Leading the charge are our marquee products: the 'SCB13-RL solid triangle ironcore dry-type transformer' and the 'SBH16-RL solid triangle rolled iron core amorphous transformer,' both compliant with the prestigious 'Zhejiang manufacturing quality standard.' Moreover, we have been instrumental in drafting ten vital standards, including the significant 'GB/T32825-2016 National Standard for Three-phase Dry-type Three-dimensional Wound Core Distribution Transformer,' 'NB/T 10483-2020 Standard for Three-phase Dry-type Amorphous Alloy Three-dimensional Wound Core Distribution Transformer,' and 'T/CEElA 251-2016 Standard for Composite Transformers for Photovoltaic Power Generation.' Our unwavering dedication to energy conservation and emission reduction propels us at the forefront of green energy technology development in China.
THE HONOR OF COMPANY
In an age where market competition is fierce and technological growth is rapidly advancing, Golden Triangle Electric Power Technology Co., Ltd. remains resolute with the philosophy that 'quality is the lifeline of the enterprise.' Through the rigorous application of the ISO9001:2000 international quality management system, we have solidified our commitment to achieving 'quality excellence, service perfection, and continuous quality improvement' as our guiding policy, ensuring unmatched customer satisfaction. This unwavering dedication has earned us a place in the 'energy-saving and Huimin engineering energy-efficient distribution transformer' catalog, as acknowledged by the National Development and Reform Commission, Ministry of Finance, and Ministry of Industry and Information Technology during its inaugural enterprise promotion.
The exhibition we attended
Display area
SEVERAL PICTURES ABOUT COMPANY AND PRODUCTION
Guided by a steadfast commitment to 'quality first, honest service, strict management, and striving for perfection,' Golden Triangle Electric Power Technology Co., Ltd. is devoted to providing our esteemed clients with top-tier technology, premium quality, and outstanding service. We warmly welcome individuals from all industries to visit us for guidance and negotiation, fostering mutual growth, forging a 'win-win' partnership, and collaboratively creating a brighter future with us!
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