500kVA Three Phase Pad Mounted Transformer 24940V to 480V Oil Immersed Distribution Utility Transformer UL Certified

1. Winley Electric three-phase transformers are UL/cUL Listed under File No. E536138, with ratings from 45 kVA through 7000 kVA. They are designed and manufactured to meet applicable ANSI/IEEE, CSA, NEMA, and DOE 2016 requirements.
2. With extensive experience in North American utility, industrial, and commercial projects, Winley Electric can deliver cost-effective customized solutions based on your specific project requirements.
3. With a strong supply chain and experienced production team, standard three-phase pad-mounted transformers can be completed in 4–6 weeks after technical approval to help keep your project on schedule.

Engineered to meet the rigorous demands of modern electrical grids, this 500kVA Three-Phase Pad-Mounted Transformer delivers premium voltage conversion from 24940V down to 480V. Built with high-grade components compliant with the ANSI C57.12.34 standard, it represents a highly efficient, space-saving outdoor distribution solution.

Utilizing eco-friendly, biodegradable FR3 non-PCB insulating oil paired with KNAN natural cooling, it ensures reliable and safe continuous operation. This compartmentalized design seamlessly integrates high-voltage switching, robust fusing protection, and low-voltage terminations into a single secure, tamper-resistant enclosure, making it a strong fit for utility networks, commercial complexes, and light industrial facilities.

     

• Oil Level Indicator — Displays the transformer oil level inside the tank.
• Bayonet Fuse — Protects the transformer from overcurrent or short circuit.
• Tap Changer — Adjusts voltage tap position.
• Load Break Switch — Switches the HV circuit on or off.
• HV Bushings — Connection points for HV cables.
• Grounding Terminal — Provides protective grounding.
• Oil Filling Valve — Used for oil filling, filtering or maintenance.
• Pressure Relief Valve — Releases excess tank pressure.
• Pressure Indicator — Indicates internal tank pressure.
• Nameplate — Displays key ratings and identification information.
• LV Bushings — Connects LV output cables.
• Oil Drain Valve — Bottom-mounted valve for complete oil evacuation and sampling.

• Utility Distribution Nodes

  The ANSI C57.12.34 architecture makes it ready for modern suburban grid layouts, regional step-down stations, and decentralized utility infrastructure across North America.

• Commercial Complexes & Office Parks

  Delivers a powerful 480V commercial supply while maintaining an elegant, fully enclosed outward appearance that easily blends into urban landscaping.

• Industrial Power Supply & Logistics Facilities

  Handles demanding process machinery, heavy auxiliary equipment, and outdoor feeder bays with robust short-circuit ride-through performance.

A: Winley delivers standard three-phase pad-mounted transformers with a 4–6 weeks production time after technical approval. We provide a detailed production schedule and real-time manufacturing photos to help track progress.

A: We offer a flexible MOQ of just 1 unit. Complete inquiries are quoted within 1–2 days with 24/7 support. Leveraging our extensive North American project experience, we ensure highly cost-effective and reliable solutions.

A: Yes, We accept OEM and ODM. Winley three-phase pad-mounted transformers are available in standard ratings from 45–5000kVA (and maximum capability up to 7000 kVA), with HV systems up to 36 kV. We can customize electrical parameters, structure, fluid, protection, switches, gauges, tank and paint according to customer drawings, with the capability to integrate components from brands like Qualitrol, Eaton Cooper, and MR.

A: Yes. Our full range of products are UL/cUL-certified under UL File No. E536138, designed strictly in compliance with ANSI/IEEE, CSA, DOE, and NEMA requirements to meet grid connection and regulatory standards.

A: We deliver a complete compliance package: approval drawings, datasheets, routine test reports, UL/cUL certs, DOE 2016 docs, and operation manuals. We also back your project with lifetime documentation support.

A: Winley ensures quality through 4 annual unannounced UL audits and strict ISO 9001 process management with dedicated QC oversight. Prior to delivery, every unit undergoes comprehensive routine testing, including Winding Resistance, Turns Ratio, Polarity and Phase Relation, and No-Load Loss and Excitation Current tests. We also fully support Factory Acceptance Testing (FAT) and third-party inspections (SGS).

A: 24 months from B/L. If there are any accessory problems, just provide photos of damaged accessory, then we will provide free service. According to the number of products, we will provide easily damaged accessories for free. We can also provide technical support if you need.