3000kVA Three Phase Pad Mounted Isolation Transformer 480V to 416Y/240V FR3 KNAN ANSI/IEEE Standards

1. Winley Electric three-phase transformers are UL/cUL Listed under File No. E536138, with ratings from 45 kVA through 10 MVA. 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, Winley Electric support fast delivery with a 4–6 weeks production time after technical approval to help keep your project on schedule.

Engineered to bridge standard 480V delta supplies with 416Y/240V grounded-wye systems, this 3000kVA three-phase pad-mounted isolation transformer provides reliable outdoor power distribution for industrial plants, data centers and critical infrastructure. Built in accordance with ANSI C57.12.34, it uses FR3 natural ester fluid and KNAN natural cooling for efficient operation without forced-air cooling equipment. The transformer provides a practical localized voltage-matching solution for manufacturing facilities and commercial campuses integrating imported or specialized 416/240V equipment into existing 480V systems.

The Dyn1 connection provides electrical isolation and establishes a grounded neutral point on the secondary side. By supplying both 416V three-phase power and 240V line-to-neutral service from a single pad-mounted unit, it can reduce the need for separate auxiliary transformers, helping simplify downstream distribution, save installation space and control overall system costs.

     

• HV and LV Bushings — Three primary and four secondary bushings are fitted with 8-hole spade terminals and 30kV BIL for high-current cable connections.
• Oil Level Gauge with Contacts — Provides local oil-level indication and electrical contacts for remote status signaling.
• Vacuum Pressure Gauge — Displays the internal pressure or vacuum condition of the sealed transformer tank.
• Pressure Relief Valve — Relieves abnormal internal tank pressure to help protect the transformer tank and seals.
• Oil Temperature Gauge with Contacts — Monitors insulating-fluid temperature and provides contacts for alarm or control signals.
• Gas Sampler Valve — Allows gas sampling for inspection and insulation-condition assessment.
• Oil Fill Plug and Drain Valve — Supports oil filling, filtering, sampling and complete oil drainage during maintenance.
• Grounding Pads and Lugs — Provides grounding points for the tank, neutral conductor and protective grounding system.

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 10MVA), 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. During the warranty period, 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.