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.
THE STRUCTURE AND ADVANTAGES
Discover the outstanding D11 series - a high-efficiency, low-loss single-phase transformer, meticulously engineered to serve the essential needs of agricultural production, lighting, and power consumption across rural power grids and remote mountainous areas. This versatile transformer also excels in urban power grid transformations, delivering unparalleled energy savings. Its design allows for seamless installation directly on platforms or wire poles. The single-phase oil-immersed distribution transformer has proudly passed rigorous type tests conducted by the national quality supervision and inspection center of transformers. This remarkable transformer boasts a unique low voltage combination of 2 * 0.23kV, setting it apart from conventional single-phase two-wire transformers. Featuring a low voltage current that is merely half of the standard single-phase transformer's rated current, and a la1-a2 voltage that doubles the usual 230V, it ingeniously halves the current, leading to a dramatic reduction in line loss - only 1/4 (P=I2R) compared to traditional models. This striking decrease in line loss is a key factor in the global acclaim and adoption of our single-phase transformer by international consumers.
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. [2]
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.
Advantage
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
Technical Specification
D14-M-(10/160)/ 10 Single Phase Oil-Immersed Distribution 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(%) |
| 10 |
6
6.3
6.6
10
10.5
11 |
±2*2.5
±5 |
2*(0.22-20.24) or 0.22-0.24 |
li0
li6 |
36 |
212 |
1.1 |
| 16 |
44 |
297 |
1.0 |
| 20 |
52 |
346 |
0.9 |
| 30 |
64 |
504 |
0.8 |
| 40 |
80 |
630 |
0.8 |
| 50 |
96 |
769 |
0.7 |
| 63 |
116 |
918 |
0.6 |
| 80 |
128 |
1130 |
0.6 |
| 100 |
152 |
1340 |
0.6 |
| 125 |
184 |
1580 |
0.5 |
| 160 |
232 |
1920 |
0.5 |
NOTICE!
Before placing your order, kindly ensure you provide the following essential details:
1. The specific type of prefabricated substation required;
2. Desired transformer model and its capacity;
3. Main wiring scheme for both high and low voltage circuits;
4. Types and precise parameters of electrical components with any special requirements;
5. Your preferred shell color;
6. Detailed list of names, quantities, and any additional requirements for spare parts.
Insulation Function
(1) Make the conductive body insulated from other parts.
(2) Can separate different charged parts.
(3) Through reasonable insulation arrangement, it can improve the uniformity of the electric field distribution.
(4) Enable electrical devices to obtain a certain capacitance.
(5) Serve as mechanical support, fixation and oil circulation heat dissipation functions, etc.
Two-year warranty
More than three certifications
15 years of accumulated experience
Packaging & Shipping
product recommendation
ABOUT OUR COMPANY
Golden Triangle Power Technology Co., Ltd. (stock name: Golden Triangle, stock code: 837424), founded in November 2009, is a beacon of innovation and excellence in the power industry. We are dedicated to the research and development, production, sales, and technical services of an extensive range of power products. Our portfolio includes
cutting-edge three-dimensional coil core transformers, amorphous alloy core transformers, photovoltaic substations, revolutionary energy storage equipment, high and low voltage switchgear, and sophisticated European, American, and Chinese outdoor box substations. Our expertly crafted products are crucial in sectors such as State Grid, Southern Power Grid, railways, mining, infrastructure, and real estate management. As a progressive production service-oriented enterprise, we integrate construction EPC with outstanding results.
With a commitment to excellence, our company is proud to hold multiple prestigious certifications, including ISO9001:2015 for quality management, ISO14001:2015 for environmental management, and ISO45001:2008 for occupational health and safety management. We also possess the PCCC energy-saving product certification, national mandatory 'CCC' certification, CQC China quality certification, and AAA credit rating certification. Celebrated as a national high-tech enterprise, we are also recognized as a provincial 'specialized, special, and new' SME, and among the top 100 scientific and technological enterprises with growth potential in the province. Our accolades include being acknowledged as a provincial SME with advanced scientific standing and a municipal green factory. We proudly operate a provincial high-tech enterprise R&D center, an academician workstation, a doctor innovation workstation, and hold 3 invention patents alongside 51 utility model patents.
Golden Triangle Electric Power Technology Co., Ltd. takes great pride in showcasing its exceptional offerings within the 'Energy Saving and People Benefiting Project' and the 'Recommended Catalog of Energy Saving Electromechanical Equipment,' which have been enthusiastically endorsed by prestigious entities such as the Ministry of Industry and Information Technology, the Ministry of Finance, and the National Development and Reform Commission. As a pioneering leader in Wenzhou's dynamic power industry, we possess the esteemed honor of receiving direct financial subsidies from the Ministry of Finance, recognizing our outstanding contributions to product sales. Our innovative products are lauded with coveted titles including the esteemed National Industrial Energy Saving Technical Equipment Products, the pioneering First Set of Products in Key Fields of Provincial Equipment Manufacturing, and the distinguished Provincial Excellent New Industrial Products. Our flagship creations, the 'SCB13-RL Solid Triangle Ironcore Dry-Type Transformer' and the 'SBH16-RL Solid Triangle Rolled Iron Core Amorphous Transformer,' are crafted in adherence to the rigorous 'Zhejiang Manufacturing Quality Standard.' As industry forerunners, we have had the privilege of leading the formulation of 10 vital standards, notably including the 'GB/T32825-2016 National Standard for Three Phase Dry Type Three-Dimensional Wound Core Distribution Transformer,' the 'NB/T 10483-2020 Standard for Three Phase Dry Type Amorphous Alloy Three-Dimensional Wound Core Distribution Transformer,' and the 'T/CEElA 251-2016 Standard for Composite Transformers for Photovoltaic Power Generation.' These pioneering contributions significantly propel the forefront of energy conservation, emission reduction, and the advancement of green energy technology within China's power industry.
THE HONORS OF OUR COMPANY
In an era marked by intense competition and the fast-paced evolution of technology, Golden Triangle Electric Power Technology Co., Ltd. steadfastly adheres to its core philosophy that 'quality is the enterprise's life.' By rigorously implementing the ISO9001:2000 international quality management system, we have firmly anchored our unwavering commitment to quality: 'quality excellence, service perfection, continuous quality improvement.' This dedication guarantees the highest levels of customer satisfaction. Our company was proudly recognized in the 'Energy Saving and Huimin Engineering Energy-Efficient Distribution Transformer' initiative by the National Development and Reform Commission, Ministry of Finance, and Ministry of Industry and Information Technology during its prestigious initial enterprise promotion.
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Golden Triangle Electric Power Technology Co., Ltd. is wholeheartedly committed to the quality policy of 'quality first, honest service, strict management, and striving for perfection.' In reciprocation of our users' trust, we proudly offer first-class technology, exceptional quality, and unparalleled service. We extend a warm welcome to individuals from all walks of life to visit us for insightful guidance and fruitful negotiation. Together, let us pursue mutual growth, build a prosperous win-win partnership, and craft a brighter, more radiant future together.
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