315kVA Distribution Transformer – Compact Three-Phase Oil-Immersed Solution

The 315kVA Distribution Transformer from Retrolex Transformers is a compact, three-phase, oil-immersed transformer engineered for commercial and light industrial power distribution. Designed for efficiency, safety, and long-term reliability, this transformer features an O.N.A.N. (Oil Natural Air Natural) cooling system, which dissipates heat naturally without mechanical assistance. This energy-efficient cooling system reduces maintenance, minimizes operational costs, and ensures stable performance across varying load conditions, even under continuous heavy load operation or fluctuating environmental temperatures, providing consistent, reliable power for sensitive equipment and preventing costly downtime, while optimizing overall energy efficiency throughout its operational life.

Supporting high-voltage inputs of 6.6kV or 11kV and providing a 420V low-voltage output, the 315kVA Distribution Transformer incorporates essential safety and monitoring components. These include a Conservator Tank, Buchholz Relay, Temperature and Oil Level Indicators, Pressure Relief Valve, Drain Valve, Cable Boxes, and an Off-Circuit Tap Changer. Together, these features make the transformer safe, reliable, and easy to maintain, even in demanding industrial or commercial environments, while also supporting long-term operational efficiency, consistent energy delivery across multiple connected loads, and compliance with international electrical standards.

Benefits of the 315kVA Distribution Transformer

• Compact & Efficient: Ideal for commercial and light industrial facilities with limited space.

• Low Maintenance: Natural O.N.A.N. cooling reduces operational complexity and energy consumption.

• Advanced Safety Features: Buchholz Relay, Pressure Relief Valve, and other indicators provide early fault detection and protection.

• High Reliability: Premium materials and robust design ensure long-lasting performance.

• Easy Integration: Compatible with indoor and outdoor installations, with flexible mounting options.

• Operational Efficiency: Supports stable voltage supply and reduces downtime for sensitive equipment.

• Eco-Friendly Operation: Energy-efficient design lowers electricity use and overall environmental impact.

Applications

• Commercial buildings and office complexes

• Light industrial and manufacturing facilities

• Small utility distribution networks

• Renewable energy integration points

• Backup or emergency power systems