35kv oil immersed power transformer is a reliable and efficient electrical equipment designed for power transmission and distribution systems. It uses high-quality insulating oil to provide excellent cooling performance, insulation strength, and stable operation under high voltage conditions. This transformer is widely applied in industrial plants, substations, renewable energy projects, and commercial power networks.

As a professional oil transformer factory, we provide customized solutions with advanced manufacturing technology, strict quality control, and long service life. The 35kv oil immersed power transformer features low energy loss, strong overload capacity, and safe operation, making it an ideal choice for modern power infrastructure. It is designed to ensure reliable electricity supply while reducing maintenance costs and improving overall system efficiency.

Product Features

Tier 1 Efficiency

The 35kv oil immersed power transformer fully complies with GB 20052-2024 Tier 1 standards. Its full copper windings and optimized core design lower conductive loss by 30%~50% compared to traditional S11 models, making it an advanced oil immersed transformer in the market.

100% Full Copper

For this 35kv oil immersed power transformer, the high-voltage windings use premium oxygen-free copper wire, and the low-voltage windings use full copper foil. This design offers supreme conductivity, minimal heating, and extreme short-circuit resistance, ensuring stable and reliable operation.

IP54 Weatherproof

The fully sealed oil tank of this 35kv oil immersed power transformer features an IP54 outdoor rating, enduring temperatures from -25℃ to 45℃. It can completely resist dust, rain, and complex industrial environments, providing long-lasting protection for the internal components.

30+ Years Lifespan

Its hermetically sealed design eliminates oil oxidation, reducing the need for frequent maintenance. Additionally, it comes with a 5-year warranty covering all core components, offering ultimate peace of mind to users.

Key Specifications (35kv oil immersed power transformer S22 Series)

Detailed Description

Our core supply, the 35kv oil immersed power transformer Full Copper S22 Series, encompasses a complete product line from 160kVA to 3150kVA. These are ultra-low loss, highly efficient distribution transformers representing the premier choice for 35KV domestic grid power supply and primary distribution in medium-to-large industrial enterprises. Relying on mature manufacturing craftsmanship, we guarantee extremely low loss, stable operation, high short-circuit resistance, excellent environmental endurance, and a prolonged lifespan.

The high-voltage windings are precisely wound with oxygen-free copper wire, and the low-voltage windings use full copper foil. Compared to traditional aluminum or copper-clad aluminum windings, conductive loss is reduced by over 30% with much better thermal stability. The insulation system combines high-quality mineral oil with multi-layer insulating paper. Through strict vacuum drying and vacuum oil-filling processes, internal moisture and bubbles are completely eliminated. Furthermore, the core is stacked using imported premium cold-rolled grain-oriented silicon steel with a 45-degree full-mitre step-lap joint, ensuring low noise, low loss, and immense mechanical strength. The fully sealed tank effectively prevents oil leakage and air ingress, resulting in partial discharge ≤10pC and an impressive design life of over 30 years. It also features off-circuit tap changing (±5% or ±2×2.5%) for precise voltage regulation.

Oil Immersed TransformerManufacturer Core Advantages

S22 Series 35KV Oil Immersed Power Transformer Applications & Core Specs

Standard S22 Series Technical Reference

* The table above displays the standard S22 technology platform parameters based on the 10kV/20kV class. For the 35kV class, variables such as impedance (typically 6%-8%), dimensions, and weight will increase appropriately due to enhanced high-voltage insulation requirements. Precise specifications will be provided via the final technical drawing.

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