For large industrial or photovoltaic projects, using a 35KV transformer often presents challenging issues - single-winding power supply fails to meet the demands of multiple loads, and uneven current distribution can lead to equipment overload; when paired with Photovoltaic Prefabricated Cabin, a common Oil Immersed Transformer is too large for installation and a Dry Type Transformer is unable to handle high loads; traditional oil transformers have a high risk of oil leakage, and during maintenance, refilling oil and conducting repairs are costly and time-consuming. Hualai Electric's 35KV Oil Immersed Transformer Double Split specifically addresses these problems. With its dual-split windings for precise power supply, flexible adaptation, and hassle-free operation, it can reliably support large loads for both industrial power distribution and photovoltaic grid connection.
Product Description
The Hualai Electric 35KV double-split oil-immersed transformer is a high-reliability Oil Immersed Transformer. It adopts a double-split low-voltage winding design, which can divide the electrical energy into two independent outputs, providing power to different loads separately. The core is made of high-magnetic-conductivity cold-rolled silicon steel sheets, with an optimized laminating method to reduce no-load losses; the windings are tightly wound with oxygen-free copper wire, with an insulation grade of A, and are paired with high-quality transformer oil, featuring excellent heat dissipation and insulation performance. The overall structure of the equipment is compact, being 15% smaller in volume than ordinary oil transformers of the same capacity, and can be adapted to the installation space of Photovoltaic Prefabricated Cabin, without the need for significant modification of the cabin. It is equipped with an intelligent oil level monitoring and temperature control system, which automatically alarms when the oil level is too low or the temperature is too high, reducing the frequency of manual inspection and making operation and maintenance more convenient.
Technical Specifications
This dual-split transformer has a rated capacity ranging from 500kVA to 2500kVA. The high-voltage side voltage is 35KV, and the voltage of the low-voltage side dual-split winding is 0.4KV. The deviation of the two output currents is ≤2%. The power supply distribution is precise. The no-load loss is ≤800W, and the load loss is ≤5500W (at rated capacity), which is 12% more energy-efficient than the ordinary 35KV Oil Immersed Transformer, and can save thousands of kilowatt-hours of electricity annually. The temperature rise limit is: the top oil temperature ≤55K, the average winding temperature rise ≤65K. It can maintain stability even under long-term full-load operation; the transformer oil breakdown voltage is ≥40kV, with strong insulation performance, reducing the risks of oil leakage and short circuits. The cooling method is ONAN (natural oil circulation natural cooling), suitable for the enclosed environment of Photovoltaic Prefabricated Cabin, and no additional cooling equipment is required.
Product features and advantages
The Hualai Electric 35KV dual-split oil transformer precisely meets the requirements of large-load scenarios. Firstly, it provides precise power supply. The dual-split windings output independently, and when multiple loads operate simultaneously, the current distribution is uniform, avoiding equipment overload and having higher safety than single-winding transformers. Secondly, it is flexible in adaptation. It has a compact volume and can be installed in Photovoltaic Prefabricated Cabin. Its high-load tolerance is better than Dry Type Transformer, and it can be used in both industrial and photovoltaic scenarios. Thirdly, it is convenient for operation and maintenance. The intelligent monitoring system reduces manual inspections, and the high-quality transformer oil and sealing design reduce the risk of oil leakage. The operation and maintenance cost is 30% lower than that of ordinary oil transformers. Fourthly, it is energy-saving and durable. The low-loss design reduces electricity expenses, and the A-class insulation and high-quality materials extend the equipment life by 5-8 years compared to ordinary oil transformers. Fifthly, it is safe and reliable. It has complete temperature control and oil level protection to avoid faults caused by overheating or abnormal oil levels, ensuring continuous operation of the project. Application scenario
For large-scale photovoltaic power stations, it is connected to the Photovoltaic Prefabricated Cabin. The double-split windings supply power to the inverter and the energy storage system respectively, ensuring uniform current distribution and avoiding the impact of single overload on grid connection. For heavy industrial enterprises such as steel and chemical industries, it is used as the core of power distribution, providing two output paths to supply production equipment and auxiliary systems, ensuring the continuous operation of the production line. In industrial parks, it supplies power to multiple factory buildings. The double-split design reduces the need for repeated purchase of transformers and lowers the initial investment. For large off-grid photovoltaic systems in remote areas, it splits the high-voltage electricity into low-voltage electricity to supply residential electricity and agricultural irrigation equipment, meeting the diverse load requirements. For data center backup power systems, it stabilizes the distribution of electrical energy to ensure the reliable operation of servers and cooling equipment.
Customer Benefits
Choosing this double-split oil transformer can significantly reduce costs and risks for the project. Precise power supply reduces equipment overload damage and lowers maintenance and replacement costs; it saves the cost of cabin modification by adapting to the Photovoltaic Prefabricated Cabin, saving 50% of investment compared to buying two single-winding transformers; intelligent monitoring and low oil leakage risk reduce labor and material expenditures for operation and maintenance, making it more cost-effective in the long term. Energy-saving design reduces electricity expenses, and the equipment price difference can be recovered in a short period; high reliability reduces the number of power outages and avoids production losses or reduction in grid connection benefits due to power outages. For large-scale projects, the double-split design can also simplify circuit layout and reduce cable procurement and laying costs.
Customer Reviews and Recommendations
Mr. Liu from the photovoltaic power station project said: "Previously, we used single-winding oil transformers, and the power supply for the inverter and energy storage system was not uniform. After replacing with Hualai Electric's double-split oil transformer, the deviation of the two currents was extremely small. It fits perfectly in the Photovoltaic Prefabricated Cabin. The intelligent alarm is also convenient, and there is no need to check the oil level every day." Mr. Wang, the manager of the chemical enterprise, commented: "The production and auxiliary system loads in the factory are different. This oil transformer with double-split output is just suitable for this, and it saves a lot of money compared to buying two transformers. It has not leaked oil for two years, and the load loss is lower than expected. Monthly electricity expenses have saved over 3000 yuan." Mr. Zhang, the power equipment purchaser, recommended: "After comparing with multiple brands, this 35KV double-split oil transformer has the strongest adaptability and can be compatible with the Photovoltaic Prefabricated Cabin. Its reliability is higher than Dry Type Transformer, and customer feedback shows that the operation and maintenance cost is low. It has been recommended to three large industrial projects."
