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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
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.
Introducing the S9-M(30-2500)/10 3-phase oil-immersed distribution transformer. This state-of-the-art equipment is designed for optimal energy efficiency and minimal loss, ensuring top-tier performance for all your electrical distribution needs. Experience unparalleled reliability and long-lasting durability, making it the perfect solution for modern electrical grids.
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 |
80 | 630/600 | 1.5 |
50 | 100 | 910/870 | 1.3 | ||||
63 | 110 | 1090/1040 | 1.2 | ||||
80 | 130 | 1310/1250 | 1.2 | ||||
100 | 150 | 1580/1500 | 1.1 | ||||
125 | 170 | 1890/1800 | 1.1 | ||||
160 | 200 | 2310/2200 | 1.0 | ||||
200 | 240 | 2730/2600 | 1.0 | ||||
250 | 290 | 3200/3050 | 0.9 | ||||
315 | 340 | 3830/3650 | 0.9 | ||||
400 | 410 | 4520/4300 | 0.8 | ||||
500 | 480 | 5410/5150 | 0.8 | ||||
630 | Dyn11 Yyn0 |
570 | 6200 | 0.6 | |||
800 | 700 | 7500 | 0.6 | ||||
1000 | 830 | 10300 | 0.6 | ||||
1250 | 970 | 12000 | 0.5 | ||||
1600 | 1170 | 14500 | 0.5 | ||||
2000 | 1550 | 18300 | 0.4 | ||||
2500 | 1830 | 21200 | 0.4 |
ABOUT OUR COMPANY
Golden Triangle Power Technology Co., Ltd. (stock name: Golden Triangle; stock code: 837424) was established in November 2009. We are dedicated experts in the research, development, production, sales, and technical services of power products. Our offerings include a wide range of innovative solutions, such as three-dimensional coil core transformers, amorphous alloy core transformers, amorphous three-dimensional coil core transformers, photovoltaic substations, energy storage equipment, high and low voltage switchgear, and various intelligent substations. As a production service-oriented enterprise, integrating construction EPC, our products are extensively utilized in sectors including State Grid, Southern Power Grid, railways, mines, infrastructure, metallurgy, roads and bridges, and real estate management systems.
Golden Triangle proudly holds an array of prestigious certifications: ISO9001:2015 (quality management), ISO14001:2015 (environmental management), and ISO45001:2008 (occupational health and safety management). Our accolades also include the PCCC energy-saving product certification, the national mandatory product 'CCC' certification, the CQC China quality certification, and an AAA credit rating. Recognized as a national high-tech enterprise, we are a provincial 'specialized, special and new' small and medium-sized enterprise, and one of the top 100 most growth potential technological enterprises in our province. Our esteemed honors include being a provincial small and medium-sized scientific and technological enterprise and a municipal green factory. We operate provincial high-tech enterprise R&D centers, academician workstations, and a doctor innovation workstation, holding 3 invention patents and an impressive 51 utility model patents.
Our products are proudly featured in the 'Energy Saving and People Benefiting Project' promotion catalog 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. Golden Triangle is honored to be the first power industry enterprise in Wenzhou to receive direct subsidies from the Ministry of Finance for product sales. Our products have garnered prestigious titles such as national industrial energy-saving technical equipment products and first set of products in key fields of provincial equipment manufacturing. Noteworthy production standards, including 'SCB13-RL solid triangle iron-core dry-type transformer' and 'SBH16-RL solid triangle rolled iron core amorphous transformer,' are recognized as 'Zhejiang manufacturing quality standards.' Our contributions to drafting 10 standards, including 'GB/T32825-2016 National Standard for Three-phase Dry-type Three-dimensional Wound Core Distribution Transformer,' highlight our unwavering commitment to energy conservation, emission reduction, and the advancement of green energy technology in China's power industry.
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THE HONOR OF COMPANY
A: All the goods past the test, maintenance is very easy.