30KVA 20KV Oil-immersed transformer Pure aluminum

30 kVA, 20 kV oil-immersed transformer in the 20KV Distribution Transformer series. Aluminium-winding option listed. Confirm capacity, voltage ratio, winding and insulation materials, tap arrangement, losses, impedance, frequency, environmental conditions, testing and applicable standards against the project specification before ordering.

Manufacturer-supplied product information: Jiangsu Huayu Electric Co., Ltd.

Product Details

30KVA 20KV All-Aluminum Winding Oil Immersed Transformer Outdoor Power Distribution Equipment

 

Currently, small and medium-sized outdoor power distribution projects generally face the industry pain points of high equipment purchase costs and large long-term operation and maintenance investments. Many purchasers who choose traditional winding transformers encounter problems such as excessive weight and additional transportation and installation costs. Our company offers a targeted solution: a 30KVA 20KV Pure aluminum Oil Immersed Transformer. The entire winding is made of pure aluminum with an optimized structure, reducing the weight of the unit while ensuring the stability of 20kV high-voltage insulation. This reduces transportation and foundation construction costs, resulting in lower no-load losses during long-term operation and providing a stable power output for rural power grids and small factories.

 

This equipment relies on circulating insulating oil for heat dissipation, offering superior efficiency compared to similarly sized dry-type transformers. Suitable for outdoor installations, it’s commonly used as the core transformer unit within box-type substations, paired with a matching high-and-low voltage switchgear to complete the entire power distribution circuit. In distributed photovoltaic projects, it can be used with an Electric Power Converter to adjust power parameters, meeting the voltage boosting and distribution needs of small Combined Photovoltaic Substations. The product is suitable for rural power grid upgrades, small processing plants, livestock farms, and temporary outdoor construction power distribution. The pure aluminum winding material significantly reduces upfront procurement costs. The equipment boasts excellent overload tolerance, with voltage output fluctuations controlled within standard ranges, providing stable protection for downstream motors, lighting, and photovoltaic equipment from voltage surges. Compared to traditional copper-winding oil-immersed equipment, its lightweight design reduces foundation load requirements, eliminating the need for additional civil engineering reinforcement. The fully sealed oil tank structure minimizes leakage, making it suitable for complex outdoor conditions such as rain and dust. Its overall service life can exceed thirty years.

 

Product Features

All-Pure Aluminum Integrated Winding: Both high and low voltage windings are made of pure aluminum, balancing cost-effectiveness and conductivity. The lightweight body reduces overall transportation and installation costs.

20kV Compatible Fully Sealed Oil-Immersed Structure: Standard 20kV high voltage level, Oil Immersed Transformer corrugated tank sealing technology delays insulating oil oxidation and reduces the frequency of routine leakage maintenance.

 

Usage Tips

1.Insulation resistance testing must be completed before commissioning. Grounding wiring should be completed using the matching High And Low Voltage Switchgear. Grounding resistance must comply with local power regulations.

2.Outdoor placement requires adequate ventilation clearance. Insulating oil withstand voltage should be tested annually. Filter and replace the oil promptly if it fails to meet standards to extend the overall lifespan of the unit.

 

FAQ

Q: Can this Oil Immersed Transformer be used with Combined Photovoltaic Substations?

A: Yes. This 30KVA capacity is suitable for small-scale photovoltaic pre-installed stations. With an Electric Power Converter to regulate the photovoltaic output voltage, it can be integrated into a Box Type Substation for outdoor use.

 

Q: Compared to the Dry Type Transformer, why is this product the preferred choice for outdoor projects?

A: The Dry Type Transformer has superior fire resistance but lower heat dissipation limits and higher cost. This oil-immersed model has stronger heat dissipation capabilities, better stability during long-term full-load outdoor operation, and lower procurement costs, requiring only a simple oil collection and protection structure.

 

Q: What are the routine maintenance procedures for the equipment?

A: Monthly inspection of oil level and for any leaks or abnormal noises; annual testing of insulating oil withstand voltage and tightening of terminals; comprehensive testing of the core and winding insulation condition every three years.

 

Q: What is the scope of the after-sales warranty, and how is an oil leak handled?

A: The core winding and oil tank seals are covered by a three-year warranty. Free replacement parts will be sent for non-human-caused damage. In case of leakage, immediately disconnect the power and stop the machine, replace the aged sealing gaskets, and replenish the same specification of insulating oil. We provide remote technical guidance.