333kVA Single Phase Pole Mounted Distribution Transformer 14.4kV/7.2kV to 480V

Product Specification

333kVA Overhead Distribution Single Phase Pole Mounted Transformer 14.4-7.2kV to 480V for Rural Commercial Facilities

Product Photo

Why Choose Us

• UL and cUL Listed

Our pole-mounted distribution transformer range from 10kVA to 500kVA is UL and cUL Listed under File No. E543292. Products are designed to meet or exceed applicable ANSI/IEEE, CSA, DOE 2016, and IEC 60076 requirements.

• Flexible Project Customization

Each transformer can be configured around project-specific voltage, capacity, protection, connection, and installation requirements. Customer-specified accessory brands, including Eaton Cooper Power series and Qualitrol, are also available upon request.

• Global Supply and Technical Support

With products supplied across North America, South America, and Southeast Asia, Winley Electric combines decades of transformer experience with responsive technical support. From specification review to final delivery, we provide safe, reliable, and efficient transformer solutions for utility and industrial projects.

Main Data

Technical drawings

Standard Features

• Porcelain High-Voltage Bushing — Provides a reliable insulated connection for the primary overhead distribution circuit.
• Low-Voltage Eyebolt Terminals — Provide secure secondary connections for common 120/240V or other low-voltage distribution systems.
• Off-Circuit Tap Changer — Allows primary voltage adjustment to match actual feeder conditions.
• Grain-Oriented Silicon Steel Core — Provides an efficient magnetic path for distribution transformer operation.
• Mineral Oil or FR3 Insulating Fluid — Provides electrical insulation and natural cooling inside the transformer tank.
• Pressure Relief Device — Releases excessive internal tank pressure under abnormal operating conditions.
• Drain Valve with Sampling Provision — Supports oil draining, maintenance, and insulating-liquid sampling.
• Tank Grounding Provision — Provides a dedicated connection for transformer tank grounding.
• Lifting Lugs — Provide secure lifting points for handling and installation.
• Pole-Mounting Hanger Brackets — Support installation directly on utility distribution poles.
• Permanent Nameplate — Displays transformer ratings, connection information, and identification data.
• Cooling Fins / Radiator Fins — Increase the tank heat-dissipation area to support natural cooling of the insulating liquid during continuous operation.

Applications

• Industrial 480V Power Distribution
  Suitable for industrial facilities requiring a dedicated 333kVA single-phase 480V supply from a 7.2kV or 14.4kV primary feeder.
• Utility Distribution Points
  Provides 480V secondary service from 7200V or 14400V single-phase distribution circuits with platform-mounted installation.
• Private Distribution Networks
  Ideal for plants and large facilities operating their own medium-voltage distribution network and requiring a dedicated 480V transformer.
• Replacement and Retrofit Projects
  Supports replacement programs where either 7.2kV or 14.4kV primary service may be encountered, using one dual-voltage transformer configuration.

Specifications

Production Process

A: Winley delivers standard pole-mounted distribution transformers within 30 days 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, we ensure highly cost-effective and reliable solutions.

A: Yes. We accept OEM and ODM. Winley pole-mounted distribution transformers are available in standard ratings from 15-333 kVA (and maximum capability up to 500kVA), with HV systems up to 34.5 kV. According to customer drawings, we can customize secondary voltage, conventional or CSP design, copper or aluminum windings, low-carbon steel or stainless-steel tanks, tap changers, surge arresters, secondary circuit breakers, meter sockets and custom colors. We also integrate components from brands such as Qualitrol and Eaton Cooper.

A: Yes. Our full range of products are UL/cUL-certified under UL File No. E543292, designed strictly in compliance with ANSI/IEEE, CSA, DOE, NEMA and IEC 60076 to meet grid connection and regulatory standards.

A: We deliver a complete compliance package: approval drawings, datasheets, nameplate drawings, routine test reports, UL/cUL certs, DOE 2016 docs and accessory 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.

A: Yes. Winley matches existing nameplates, utility specifications, mounting dimensions and protection configurations for replacement projects.