25kVA CSP Pole Mounted Transformer 2400/4160GrdY to 120/240V for Overhead Distribution

• UL and cUL Listed Product Range

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.

Engineered for modern overhead distribution, this 25kVA transformer efficiently steps down 2400/4160GrdY to 120/240V. Built with premium copper windings, a grain-oriented steel core, and eco-friendly FR3 fluid (KNAN), it delivers superior reliability and compliance with ANSI C57.12.20 standards (75kV/30kV BIL).

Its key edge is the all-in-one CSP system: transformer-mounted 5kV surge arresters (3kV MCOV) and an internal magnetic secondary breaker provide full overload, short-circuit, and lightning protection with a visual warning light. This integrated design simplifies installation, cuts maintenance costs, and maximizes grid uptime.

   

• 2 × ANSI-15/50 HV Bushings — Provide the two high-voltage connection points shown on the transformer drawing.
• 3 × ANSI-1/315 LV Bushings — Provide X1, X2 and X3 secondary connection points.
• 2 × Surge Arresters, 3kV MCOV, with Caps — Provide transformer-mounted surge protection.
• LV Breaker with Light — Provides secondary circuit protection with visible warning indication.
• ±2×2.5% Tap Changer — Provides five primary voltage adjustment positions.
• Pressure Relief Device — Releases abnormal internal tank pressure.
• Drain Valve — Provides a service point for insulating liquid.
• Sealing Gasket — Maintains the seal between the tank and cover.
• Ground Pad for X2 — Provides the grounding point identified for the X2 connection.
• 2 × Lifting Lugs — Provide lifting points for handling and installation.
• Nameplate — Carries transformer identification and rating information.

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.