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
Product Parameters
Transformer Normal Service Conditions
The height above sea level should be below 1000m for optimal performance.
Maximize efficiency with a highest air temperature of up to +40ºC.
Experience consistent performance with a highest daily average air temperature of +30ºC.
Achieve reliable operation with a highest annual average air temperature of +20ºC.
Capable of withstanding outdoor temperatures as low as -25ºC effortlessly.
Note: Detailed specifications for special service conditions are defined.
Technical ParametersUtilizing a three-phase oil-immersed 3D core, this distribution transformer is engineered for excellence.
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(%) |
Sound power level(dB) |
Exterior size(L*W*H)
Install4-Φ18 |
Total weight(kg) |
| 30 |
6
6.3
6.6
10
10.5
11 |
±2*2.5
±5 |
0.4 |
Dyn11
Yyn0
Yzn11 |
100 |
630/600 |
0.3 |
4 |
48 |
800*500*800 |
300 |
| 50 |
130 |
910/870 |
0.24 |
48 |
820*550*800 |
350 |
| 63 |
150 |
1090/1040 |
0.23 |
48 |
835*580*800 |
380 |
| 80 |
180 |
1310/1250 |
0.22 |
49 |
840*600*830 |
400 |
| 100 |
200 |
1580/1500 |
0.21 |
49 |
860*600*860 |
440 |
| 125 |
240 |
1890/1800 |
0.2 |
50 |
1020*660*900 |
560 |
| 160 |
280 |
2310/2200 |
0.19 |
50 |
1035*660*900 |
620 |
| 200 |
340 |
2730/2600 |
0.18 |
52 |
1040*680*930 |
680 |
| 250 |
400 |
3200/3050 |
0.17 |
52 |
1140*740*960 |
800 |
| 315 |
480 |
3830/3650 |
0.16 |
54 |
1160*760*1100 |
920 |
| 400 |
570 |
4520/4300 |
0.16 |
54 |
1230*800*1150 |
1080 |
| 500 |
680 |
5410/5150 |
0.16 |
56 |
1320*900*1150 |
1285 |
| 630 |
Dyn11
Yyn0 |
810 |
6200 |
0.15 |
4.5 |
56 |
1420*920*1180 |
1580 |
| 800 |
980 |
7500 |
0.15 |
58 |
1480*1000*1235 |
1900 |
| 1000 |
1150 |
10300 |
0.14 |
58 |
1600*1100*1280 |
2155 |
| 1250 |
1360 |
12000 |
0.13 |
60 |
1655*1135*1325 |
2515 |
| 1600 |
1640 |
14500 |
0.12 |
60 |
1815*1260*1400 |
3050 |
| 2000 |
1940 |
18300 |
0.11 |
5 |
62 |
1920*1305*1460 |
3735 |
| 2500 |
2290 |
21200 |
0.11 |
62 |
2120*1430*1525 |
4520 |
NOTICE!
Important: Prior to ordering, please provide the following essential information.
1. Specify the type of prefabricated substation.
2. Indicate the transformer model and required capacity.
3. Outline the high and low voltage circuit main wiring scheme.
4. Detail the types and parameters of any electrical components with special requirements.
5. Choose your desired shell color for customization.
6. Specify names, quantities, and additional requirements of spare parts needed.
Two-year warranty
More than three certifications
15 years of accumulated experience
Packaging & Shipping
Product Recommendation
Company Profile
ABOUT OUR COMPANY
Established in November 2009, Golden Triangle Electric Power Technology Co., Ltd. (stock name: Golden Triangle, stock code: 837424) stands as a beacon of innovation in the power industry. Specializing in the meticulous research, advanced development, and comprehensive production of power products, our portfolio includes cutting-edge three-dimensional coil core transformers, state-of-the-art amorphous alloy core transformers, innovative amorphous three-dimensional coil core transformers, efficient photovoltaic substations, robust energy storage equipment, versatile high and low voltage switchgear, and globally adaptable outdoor box substations, including European, American, and Chinese varieties. As a production service-oriented enterprise, we excel in construction EPC integration. Our products power a diverse array of sectors, including the State Grid, Southern Power Grid, railways, mining, infrastructure, metallurgy, roads, bridges, and real estate management systems, showcasing our pivotal role in powering progress and enhancing infrastructure across these key industries.
Golden Triangle Electric Power Technology Co., Ltd. is a paragon of excellence, having achieved an array of prestigious certifications. We are proud holders of the ISO9001:2015 quality management system certification, ISO14001:2015 environmental management system certification, and ISO45001:2008 occupational health and safety management system certification. Our commitment to energy efficiency is recognized by the PCCC energy-saving product certification and the national mandatory product 'CCC' certification. Additionally, we boast the esteemed CQC China quality certification and have attained an AAA credit rating certification. Recognized as a national high-tech enterprise, a provincial 'specialized, special, and new' SME, and among the top 100 scientific and technological enterprises with remarkable growth prospects in our province, we also stand as a municipal green factory. Our innovation prowess is further highlighted by our provincial high-tech enterprise R&D center, academician workstation, doctor innovation workstation, 3 invention patents, and an impressive portfolio of 51 utility model patents.
Our products have earned esteemed positions in the promotion catalogs of the 'Energy Saving and People Benefiting Project' and the 'Recommended Catalog of Energy Saving Electromechanical Equipment' by the Ministry of Industry and Information Technology, the Ministry of Finance, and the National Development and Reform Commission. Distinguished as the first power industry enterprise in Wenzhou to receive direct subsidies from the Ministry of Finance, our products shine with honorary titles such as national industrial energy-saving technical equipment products and the first set of products in key fields of provincial equipment manufacturing. Notably, our main products, 'SCB13-RL solid triangle ironcore dry-type transformer' and 'SBH16-RL solid triangle rolled iron core amorphous transformer,' are crafted to the esteemed 'Zhejiang manufacturing quality standard.' Leading the drafting of 10 significant standards, including 'GB/T32825-2016 National Standard for Three phase Dry type Three dimensional Wound Core Distribution Transformer' and 'NB/T 10483-2020 Standard for Three phase Dry type Amorphous Alloy Three dimensional Wound Core Distribution Transformer,' we make substantial contributions to energy conservation and the promotion of green energy technology in China's power industry.
THE HONOR OF COMPANY
In today's fiercely competitive and rapidly evolving market, Golden Triangle Electric Power Technology Co., Ltd. remains steadfast in its commitment to quality. Embracing the philosophy that 'quality is the enterprise life,' we have fully implemented the ISO9001:2000 international quality management system. Our quality policy, centered around 'quality excellence, service perfection, product reliability, and continuous quality improvement,' ensures customer satisfaction and trust. Our dedication has been recognized in our inclusion 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 in its inaugural enterprise promotion.
The exhibition we attended
Display area
SEVERAL PICTURES ABOUT COMPANY AND PRODUCTION
FAQ
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.
The company adheres to the quality policy of "quality first, honestservice, strict management, and striving for perfection", and gives back tothe majority of users with first-class technology, first-class quality, and first-class service. We warmly welcome people from all walks of life to visit us forguidance and negotiation, to seek common development, to jointly build a'win-win" and to create a better future with you !
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