Power System 15000kVA, 50Hz/60Hz, Three Phase
Certifications IEC 62271-200, IEC 694, GB3906, DIN VDE 0670
The Huajidian 15000 kVA oil immersed self cooled transformer is a core substation equipment for medium- and high-voltage power systems, specifically designed for large substations, industrial and mining enterprises, and regional power grids. It complies with national standards and IEC international standards, and has passed ISO9001 quality system certification, ensuring compliant and reliable quality.
The product adopts a classic integrated structure of an oil conservator and a corrugated self-cooling oil tank, eliminating the need for additional cooling fans. It relies on the natural circulation of transformer oil for passive self-cooling, resulting in a simple structure, fewer potential failure points, and convenient operation and maintenance. As a professional transformer manufacturer, Huaji Electric can provide customized solutions based on the actual needs of users' power distribution systems, including dedicated voltage matching, no-load/on-load tap changer switching, and customized accessories, adapting to the diverse power needs of all industries.
The 15000 kVA oil immersed self cooled transformer uses a high-permeability cold-rolled silicon steel core and 100% oxygen-free copper windings. The high-voltage winding has a multi-layer cylindrical structure, while the low-voltage winding has a continuous structure, resulting in uniform magnetic leakage distribution and high mechanical strength. It effectively resists the enormous mechanical stress generated by sudden short circuits in the power grid, preventing equipment deformation and damage, and exhibiting excellent short-circuit impact resistance.
The high-voltage side is equipped with multi-layer shed-skirt porcelain bushings with sufficient creepage distance, fully meeting the insulation requirements of 35kV and above high-voltage levels. This effectively prevents flashover faults caused by voltage breakdown, ensuring safe and stable operation of the equipment under complex high-voltage conditions.
The equipment is equipped with standard protective accessories such as a pressure relief valve, gas relay, and oil level indicator on the top, enabling real-time monitoring of internal oil pressure, gas, and oil level. In case of overpressure or gas accumulation, it provides rapid early warning and automatic pressure relief, effectively preventing equipment burnout and significantly improving the safety of the power system.
The equipment can be equipped with an on-load tap changer, enabling uninterrupted voltage regulation under load. For industrial scenarios with large grid voltage fluctuations, it can stabilize the output voltage in real time, avoiding equipment downtime and malfunctions caused by abnormal voltage, ensuring continuous and stable production operation.
The optimized core and winding structure significantly reduces no-load and load losses, resulting in energy-efficient operation. The dedicated oil conservator design can adapt to changes in oil volume during the operation of large-capacity equipment, delaying oil aging and deterioration, and extending equipment lifespan. Simultaneously, the fanless self-cooling structure simplifies equipment components, reduces potential failure points, and effectively lowers subsequent maintenance costs.
As core equipment for urban and rural power distribution and substation expansion and upgrades, it stabilizes regional power transmission and ensures stable power supply to urban areas and industrial zones.
Suitable for high-load production scenarios in industries such as metallurgy, chemicals, and mining, providing large-capacity, continuous, and stable power to large production equipment to ensure uninterrupted production.
Provides stable power supply to high-load public facilities such as airports, ports, large commercial complexes, and data centers, mitigating voltage fluctuation risks and supporting the smooth operation of public services and digital infrastructure.
In 2025, a regional power grid in East China undertook a project to expand the capacity of a key substation and upgrade aging equipment. The existing aging transformers had high energy consumption, poor stability, and frequent voltage fluctuations, failing to meet the increased power demand of surrounding industrial parks and urban commercial facilities. A batch of low-maintenance, highly stable 15000KVA oil-immersed self-cooled transformers was urgently needed to replace the aging equipment.
Local professional manufacturer Huaji Electric provided a customized 15000 kVA oil immersed self cooled transformer for this project. Considering the local power grid fluctuation characteristics, it was equipped with an on-load tap changer and optimized internal insulation and winding structure. Utilizing a fanless self-cooling design, it eliminates the potential for fan failures in traditional air-cooled equipment. Combined with a complete set of intelligent monitoring accessories, it achieves real-time monitoring of the equipment's operating status.
After commissioning, the substation's power supply capacity was significantly improved, grid voltage fluctuations were controlled within 1%, and no-load losses were reduced by more than 15%. The equipment operated continuously and stably for over 12 months without failure. Its low-maintenance design significantly reduced the substation's maintenance burden, completely resolving the power supply bottleneck for regional industrial and urban areas, and providing solid support for the stable operation of the local power grid.
Q1: What voltage regulation methods does the 15000 kVA oil immersed self cooled transformer support?
This product supports two mainstream voltage regulation modes, which can be selected as needed. Excitationless voltage regulation is suitable for scenarios with stable grid voltage and low voltage regulation frequency, offering lower cost and more stable operation. On-load voltage regulation enables uninterrupted voltage regulation under load, adapting to industrial and grid scenarios with large voltage fluctuations, stabilizing system voltage in real time, and ensuring the safe operation of electrical equipment.
Q2: Can this transformer adapt to complex outdoor working conditions and long-term high-load operation?
Yes. The equipment adopts a reinforced insulation design and high-strength oxygen-free copper windings, providing excellent resistance to voltage fluctuations and short-circuit impacts. Multi-layer shed porcelain bushings are suitable for complex outdoor environments such as humidity and dust, ensuring stable insulation performance. The self-cooling circulation system is suitable for 24-hour uninterrupted high-load operation, and the oil conservator structure delays oil aging, resulting in strong environmental adaptability and high operational stability.
Q3: What customized services can Huajidian provide for this transformer?
As a professional supplier specializing in customized transformers, Huajidian provides full-dimensional OEM/ODM customization services for the 15000KVA model. We can customize exclusive voltage combination solutions based on the power grid standards and actual power consumption needs of our clients' regions, offering flexible options for voltage regulation methods, monitoring accessories, and protection devices. All customized products comply with Chinese national standards and IEC international standards, meeting the power grid access requirements of different industries and regions.
Huajidian is a professional power transmission and transformation equipment factory integrating R&D, production, customization, and sales. With years of experience in the medium and high voltage transformer field, we possess mature production processes and a rigorous quality control system. All our products are ISO9001 quality system certified, ensuring stable performance and reliable quality. The brand always prioritizes customer needs, providing one-stop customized solutions from product design and manufacturing to after-sales maintenance, earning the long-term trust of customers in the power grid, industrial manufacturing, and infrastructure sectors both domestically and internationally.
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Room 2106, West End, Guangfeng Building, Ouhai District, Wenzhou City, Zhejiang Province, China
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