Power System 315kVA, 11kV/433V, 50Hz/60Hz
Certifications IEC 62271-200, IEC 694, GB3906, DIN VDE 0670
The 11kV 433V 315kVA distribution transformer is a core power distribution device developed by Huajidian for medium- and low-voltage power conversion scenarios. Through long-term technological iteration and process optimization, the company has mastered the efficient assembly and manufacturing process of this model of oil-immersed and resin-cast distribution transformers. Unlike ordinary civilian transformers, this product is specifically designed for high-load and complex industrial conditions, with standardized production processes and a stringent quality control system. The equipment conforms to IEC international standards and supports customized parameters, ensuring both quality and cost-effectiveness. Leveraging large-scale production capabilities, it can reliably supply high-quality equipment for large-scale power projects.
- Rated Capacity: 315kVA
- Rated Voltage: 11kV (High Voltage), 433V (Low Voltage)
- Applicable Systems: 50Hz AC operating conditions, suitable for 10kV and below power distribution systems, compatible with 35kV medium and high voltage power systems
- Cooling Method: Oil-immersed self-cooling (ONAN)
The 11kV 433V 315kVA distribution transformer uses a high-permeability cold-rolled silicon steel core and oxygen-free copper windings, significantly reducing no-load losses and operating noise. Combined with an integrated oil conservator and air-cooled heat dissipation structure, it solves the heat dissipation problem of industrial transformers operating under long-term high loads. The unit features low overall power loss, low noise, excellent short-circuit withstand performance, and stable temperature rise control. Its temperature rise during full-load operation meets the manufacturer's standards, ensuring long-term stable operation under high industrial loads and complex conditions.
- Urban and rural power grid upgrades and residential power supply projects, serving as core equipment for voltage conversion and control in regional power systems;
- Industrial and mining enterprises, industrial parks, and medium-load production lines, ensuring stable power supply for continuous industrial production;
- Supporting power distribution systems for national key projects, new energy power plants, and regional substations;
- Flammable and explosive hazardous conditions and outdoor open-air power distribution scenarios with reliable explosion-proof measures.
- Ambient Temperature: The operating ambient temperature must not be lower than -40℃ to avoid damage to the precision components inside the equipment due to low temperatures;
- Cooling Medium: The transformer cooling oil must be clean, non-corrosive, and non-flammable/explosive. Oil quality must be tested regularly;
- Harsh Environment Maintenance: In rainy, snowy, or humid environments, blind disassembly and repair are prohibited to prevent electrical faults caused by insulation damage;
- Special Environment Testing: In high-temperature, flammable, and explosive hazardous environments, a comprehensive insulation performance test must be completed before the equipment is put into operation.
In 2025, Huajidian supplied a batch of 11kV 433V 315kVA distribution transformers for the rural power grid upgrade project in Lintong District, Xi'an, solving the problems of unstable voltage and insufficient power supply capacity for local rural residents and small processing enterprises during peak summer electricity consumption periods. Before the upgrade, the local rural power grid had weak carrying capacity, and frequent overload outages occurred during peak electricity consumption periods such as summer cooling and agricultural production. After the equipment was installed and put into operation, the voltage qualification rate and power supply stability of the regional power grid were significantly improved. The equipment has been operating stably for over a year, exhibiting low operating noise, no overload faults, and minimal line loss. It perfectly adapts to complex outdoor working conditions in rural areas and the demands of seasonal high loads, successfully completing the local power grid expansion and upgrade, and effectively guaranteeing power supply for residential use and rural industrial development.
Question 1: What is the core difference between this 11kV transformer and a conventional 10kV transformer?
The core differences lie in the insulation class, withstand voltage performance, and application scenarios. This 11kV transformer adopts a reinforced insulation design, resulting in stronger withstand voltage and short-circuit impact resistance. It is suitable for 11kV distribution systems and 35kV medium-high voltage supporting systems, and is mainly used in regional substations, large and medium-sized industrial and mining enterprises, and other scenarios with high requirements for power supply stability.
Question 2: Does this transformer require regular maintenance? What is the maintenance cycle?
The equipment requires standardized regular maintenance. Compared to smaller transformers, its maintenance cycle is longer and its operation and maintenance costs are lower. The oil level, oil quality, desiccant in the desiccant absorber, and the condition of protective accessories should be checked regularly according to the actual operating load and conditions. For standard urban and rural power distribution scenarios, quarterly inspections and annual comprehensive maintenance are sufficient; for industrial high-load and harsh operating conditions, the frequency of inspections can be appropriately increased.
Question 3: Does the 11kV 433V 315kVA distribution transformer support customization of parameters such as voltage and voltage regulation methods?
Full OEM/ODM customization services are supported. Huajidian can customize exclusive voltage ratios, no-load/on-load voltage regulation methods, and matching accessory configurations according to the actual needs of customers' power distribution systems. Whether it's parameter adjustments for special operating conditions or configuration upgrades for special environments such as high temperatures and explosion-proof environments, the company's mature customization and large-scale production capabilities can meet various overseas and engineering personalized needs.
Huajidian is a high-tech professional manufacturer integrating transformer R&D, production, and sales, possessing mature production lines and a stringent quality control system. Its 11kV 433V 315kVA distribution transformers are stable in performance, cost-effective, and highly recognized in the industry. We sincerely welcome franchisees and engineering partners worldwide to consult and discuss our services. We can provide one-stop equipment supply and customized support services for all types of power engineering projects.
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Room 2106, West End, Guangfeng Building, Ouhai District, Wenzhou City, Zhejiang Province, China
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