480V 60Hz Cast Resin Transformers 1250kVA Aluminum Cast Coil Transformer

Leilang Electric proudly presents our premium 1250kVA three-phase isolation cast resin dry-type transformer, engineered to meet strict IEEE ANSI C57.12.00 standards for North American and global industrial applications. This 480V-to-480Y/277V isolation unit provides complete electrical separation between primary and secondary circuits, enhancing safety and reducing electrical noise. Featuring a rugged NEMA 3R enclosure and industry-leading moisture-proof, corrosion-resistant epoxy resin construction, it delivers reliable performance even in high-humidity and harsh outdoor environments. Backed by CE and ISO certifications, every transformer undergoes rigorous quality testing to ensure long-term durability and compliance with international safety norms.

Our 1250kVA cast resin transformers are fully certified to IEEE ANSI C57.12.00 standards, ensuring seamless compatibility with North American power systems. The Dyn1 vector group configuration provides balanced three-phase power with a neutral connection, supporting both single-phase and three-phase loads simultaneously. The isolation design eliminates common-mode noise and ground loops, making it ideal for sensitive electronic equipment in data centers, manufacturing facilities, and commercial buildings.

Constructed with vacuum-cast epoxy resin windings reinforced with glass fiber grids, these transformers offer exceptional moisture-proof and corrosion-resistant properties. They can operate reliably at 100% humidity without performance degradation. Housed in a durable coated steel NEMA 3R enclosure, they provide protection against rain, snow, and airborne contaminants, making them suitable for both indoor and outdoor installations. The epoxy resin encapsulation also delivers excellent mechanical strength, protecting windings from physical damage and extending service life.

Equipped with AN/AF dual cooling systems (natural air cooling for standard loads and forced air cooling for overloads), this transformer can handle up to 150% of its rated load for short periods. The low-loss silicon steel core minimizes no-load energy consumption, while 100% copper windings ensure high conductivity and low heat generation. Built-in temperature controllers with cooling fans provide real-time temperature monitoring and automatic fan activation, preventing overheating and optimizing operational efficiency.

The cast coil design delivers exceptional short-circuit resistance, with windings engineered to withstand sudden power surges without structural damage. The self-extinguishing epoxy resin material significantly reduces fire risk, eliminating the need for dedicated fire suppression systems and allowing direct installation in load centers. The compact, low-maintenance design requires only routine inspections and cleaning, reducing total operating costs over the transformer's 30+ year lifespan.