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. [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.
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
Technical Specification
Introducing the SB-500/10.5, a state-of-the-art 3-phase Oil-immersed Distribution Transformer designed to offer unmatched performance and efficiency in power distribution.
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(%) |
Impedance voltage(%) |
| 30 |
6
6.3
6.6
10
10.5
11 |
±2*2.5
±5 |
0.4 |
Dyn11
Yyn0
Yzn11 |
33 |
535/510 |
1.5 |
4 |
| 50 |
43 |
780/745 |
1.2 |
| 63 |
50 |
930/890 |
1.1 |
| 80 |
60 |
1120/1070 |
1.0 |
| 100 |
75 |
1350/1285 |
0.9 |
| 125 |
85 |
1615/1540 |
0.8 |
| 160 |
100 |
1975/1880 |
0.6 |
| 200 |
120 |
2330/2225 |
0.6 |
| 250 |
140 |
2275/2120 |
0.6 |
| 315 |
170 |
3275/3120 |
0.5 |
| 400 |
200 |
3865/3675 |
0.5 |
| 500 |
240 |
4625/4400 |
0.5 |
| 630 |
Dyn11
Yyn0 |
320 |
5300 |
0.3 |
4.5 |
| 800 |
280 |
6415 |
0.3 |
| 1000 |
450 |
8800 |
0.3 |
| 1250 |
530 |
10260 |
0.2 |
| 1600 |
630 |
12400 |
0.2 |
| 2000 |
710 |
14800 |
0.2 |
5 |
| 2500 |
860 |
16300 |
0.2 |
Experience precision with an Impedance Voltage of 4.19%, ensuring optimal performance and minimal energy loss.
Our advanced Core No-load Loss stands at a mere 653W, making it a leader in efficiency for transformers in its class.
With a No-load Loss of only 670W, our transformers remain energy-efficient, contributing to lower operational costs.
Featuring a No-load Current of just 0.34%, our transformers are optimized for superior energy performance and reliability.
The Load Loss is efficiently controlled at 5213W, ensuring that our transformers deliver maximum power with minimal wastage.
NOTICE!
Kindly provide the essential details outlined below prior to placing your order for a seamless transaction experience:
1. Specify the type of Prefabricated Substation required;
2. Indicate the precise Transformer model and desired capacity;
3. Outline the High and Low Voltage Circuit Main Wiring Scheme for clarity;
4. Detail the Types and Parameters of Electrical Components with any special requirements;
5. Choose a Shell Color to match your aesthetic preference;
6. List the 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
Company Profile
ABOUT OUR COMPANY
Golden Triangle Power Technology Co., Ltd., trading as Golden Triangle (Stock Code: 837424), has been a beacon of innovation since its inception in November 2009. We specialize in cutting-edge power product R&D, production, sales, and technical services. Our diverse offerings include three-dimensional coil core transformers, amorphous alloy core transformers, photovoltaic substations, energy storage solutions, and sophisticated high and low voltage switchgear. Moreover, our portfolio extends to European, American, and Chinese outdoor box substations, as well as state-of-the-art intelligent substations. As a service-driven manufacturer, we provide comprehensive EPC construction solutions. Our products are pivotal to sectors like State Grid, Southern Power Grid, railways, and infrastructure, ensuring excellence in energy solutions across various industries.
Our excellence is underscored by our certification achievements: ISO9001:2015 for quality management, ISO14001:2015 for environmental stewardship, and ISO45001:2008 for occupational health and safety. We proudly hold the PCCC energy-saving product certification, national 'CCC' certification, and CQC China quality certification alongside an AAA credit rating. Our accolades include recognition as a national high-tech enterprise, a provincial 'specialized, special and new' SME, and a top 100 growth-potential scientific and technological enterprise in our province. We are backed by a provincial high-tech R&D center, academician and doctor innovation workstations, and possess 3 invention patents and 51 utility model patents, showcasing our commitment to innovation and excellence.
Our products are prominently featured in prestigious initiatives such as the 'Energy Saving and People Benefiting Project' and the 'Recommended Catalog of Energy Saving Electromechanical Equipment,' endorsed by the Ministry of Industry and Information Technology, Ministry of Finance, and National Development and Reform Commission. We are pioneers in Wenzhou's power industry, receiving direct subsidies from the Ministry of Finance for our product excellence. Our offerings are celebrated as national industrial energy-saving technical equipment products and have been lauded as the first set in key provincial equipment manufacturing fields. Notably, our manufacturing standards for 'SCB13-RL Solid Triangle Iron Core Dry-type Transformer' and 'SBH16-RL Solid Triangle Rolled Iron Core Amorphous Transformer' are enshrined in the 'Zhejiang Manufacturing Quality Standards.' We have led the creation of 10 standards, including 'GB/T32825-2016' and 'NB/T 10483-2020,' making significant strides in China's green energy technology landscape.
THE HONORS OF OUR COMPANY
In the ever-evolving landscape of today's fast-paced world, where market competition surges with intensity and technological advancements occur at a breathtaking pace, Golden Triangle Electric Power Technology Co., Ltd. remains a beacon of resilience. Guided by the unwavering philosophy that 'quality is the lifeblood of the enterprise,' we have meticulously implemented the ISO9001:2000 international quality management system. Our steadfast commitment to 'quality excellence, perfect service, and continuous quality improvement' ensures unparalleled customer satisfaction and distinguishes us in the industry. Recognized by the National Development and Reform Commission, Ministry of Finance, and Ministry of Industry and Information Technology, we proudly participate in the esteemed 'Energy-Saving and Huimin Engineering Energy-Efficient Distribution Transformer' initiative. This marks a significant milestone in our journey towards sustainable innovation and excellence, underscoring our dedication to a future of progressive advancements.
Company exhibition
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SEVERAL PICTURES ABOUT COMPANY AND PRODUCTION
FAQ
- Q: Are you manufacturer?
A: Yes, we are manufacturer. Our factory is in Wenzhou China
- Q: Can I get guarantee of products?
A: Yes, every product is 1 year quality warrantee under customer correct using the products.
- Q: Do you have any Certificate?
A: Yes. Each of our unit has CCC, ISO9001 certificate. All the electric parts with CE certificate, If you need any other Certificate, we can help you to get it.
- Q: How to buy it? What about the delivery?
A: Please contact me by email or online, let me know your situation, I will give you professional solution. We have shipping agent can choosing the cheapest and fastest delivery. FOB, CIF, C&F or EXW are no problem for us.
- Q: What's the payment terms?
A: For small testing orders, we can accept Waster union, T/T and Credit card.
For mass orders, we accept t/t and L/C.
- Q: What about the production?
A: Produce time is 4~6weeks.
- Q: Could you offer some spare parts?
A: Yes, no problem.
- Q: What about the maintenance?
A: All the goods past the test, maintenance is very easy.
At Golden Triangle Electric Power Technology Co., Ltd., we are steadfastly guided by our unwavering quality policy of 'quality first, honest service, strict management, and striving for perfection.' Our commitment to these principles enables us to deliver unmatched value to our cherished customers. Leveraging our superior technology, exceptional quality, and outstanding service, we warmly invite individuals from all walks of life to visit our state-of-the-art facilities. We welcome you to join us for insightful guidance, fruitful negotiations, and the exploration of mutual growth opportunities. Together, let us forge a 'win-win' future and illuminate a brighter tomorrow, filled with shared success and innovation.
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