1250Kva Cast Resin Dry Type Transformers Isolation 480V IEEE ANSI Standard

1250Kva Cast Resin Dry Type Transformers Isolation 480V IEEE ANSI Standard


Cast-resin transformers are units with windings completely vacuum cast in epoxy resin. The epoxy provides both mechanical strength and protection from the environment.

Product Photos

Main data

Dry transformer features

1)Moisture-proof and corrosion-resistant ability , and it can run normally at 100%humidity,especially for work in extreme environmental conditions.
2)Lost loss, small local discharge, small noise, and strong heat dissipation capacity, can run 150%of the rated load operation.
3)High the whole mechanical strength of the cast coil withstand sudden short -circuit capability.
4)Safe, fire prevention, no pollution, can be installed directly in the load center.
5)Simple maintenance and installation, low comprehensive operating costs.

Technical drawings

Production process

High-voltage winding appliesvacuumpouring of padding epoxyresin which, at highlevel,reduces partial discharge capacity andelevates the electric strength of coils. The insideand outside of the winding is buildup with glassfiber grid overlaywhich strengthens thethemechanicalrobustnessandimprovesresistance of short-circuits and ensures the coilswill never crack.

Low-voltage winding applies the structure that windedby copper foil which solves the problem that the axle wouldpoint to the helix angle when winds and make the ampereturn of winding distribute evenly. Meanwhile, the coilsapplies axial fan which improves the heat dispersion.Between the layers of winding, it applies DMD epoxy resinpreliminary dip cloth and makes it whole solidificationfor

Performance & Advantages — WINLEY Cast Coil Transformer

Our cast coil transformers are engineered for durability and high performance across power-system applications. Key advantages:

• Short-time overload capability: Resin-encapsulated windings provide better resistance to sudden power surges than oil-filled designs.
• Visible temperature monitoring: Built-in winding temperature probes display readings on a digital screen for real‑time status.
• Low maintenance: Compact design generally requires only routine inspections and simple cleaning.
• Low noise: Quiet operation suits noise-sensitive environments.
• Low fire risk: Self‑extinguishing materials significantly reduce fire hazard compared with conventional types.
• Environmentally friendly: Constructed with materials that meet modern environmental and safety standards.
• Low installation cost: Easy to install and can be placed closer to the load, reducing time and expense.
• Moisture resistant: Resistant to humidity and atmospheric contaminants; suitable for outdoor or high‑humidity locations.
• High-impact loading: Robust construction withstands heavy impact loads in industrial settings.
• Vibration tolerant: Select models operate reliably under heavy vibration conditions.

WINLEY is located in Xiamen, China. We are specialized in manufacturing all kinds of transformers, voltage stabilizers, voltage regulators, etc. The products are widely used in industrial machinery, new energy, power generation, power supply, coal, metallurgy, petroleum, chemical, construction, port, airport, railway transportation, urban infrastructure, and other areas.

With more than 17 years experience, WINLEY always adhere to the route of "Integrity makes brand,quality wins the market"! We have a professional R&D team, a quality control team, scientific production management system and comprehensive customer service system.

WINLEY holds ISO 9001:2015 quality management system certification, All products have approved by CE certification, we can also apply for UL(Authorized by partner), SASO, SONCAP, etc. according to customer requirements.

WINLEY products are sold to Europe, North & South America, Oceania, Asia and Africa, more than 100 countries and regions in the world are using WINLEY products. Products’ quality and technical service are recognized by all customers around the world, and we have cooperative distributors in some countries.

And we will continue to carry forward the integrity of compliance, scientific and technological innovation, win-win cooperation spirit, provide quality products and comprehensive service to all partners, and work hard for the development of the world’s green electrical power.