Copper Winding Cast Resin Auto Dry Type transformer

The Copper Winding Cast Resin Auto Dry Type Transformer is a high-performance power distribution solution engineered for applications requiring reliable voltage transformation with inherent safety and minimal maintenance. This advanced transformer utilizes 100% copper windings fully encapsulated in premium epoxy resin under vacuum conditions, creating a solid, void-free insulation system that provides exceptional dielectric strength and environmental protection.

Unlike conventional oil-filled transformers, this dry-type unit contains no flammable liquids, eliminating fire hazards and environmental risks associated with oil leakage. The auto-transformer design enables highly efficient voltage adjustment with reduced size and weight compared to equivalent isolation transformers, making it ideal for voltage correction, motor starting applications, and HVAC systems where galvanic isolation is not required .

The Copper Winding Cast Resin Auto Dry Type Transformer excels in indoor installations, commercial buildings, industrial facilities, and renewable energy systems where safety, space efficiency, and operational reliability are paramount. With superior short-circuit strength and excellent overload tolerance, this Copper Winding Cast Resin Auto Dry Type Transformer delivers consistent power quality even under demanding load conditions.

Product Parameter (Specification)

Product advantages

1. Superior Conductivity & Energy Efficiency

Our transformers utilize 100% high-purity electrolytic copper windings, delivering measurable performance gains over aluminum alternatives.

Lower Energy Losses: Copper's superior conductivity (IACS 100%) reduces load losses by approximately 25-30% compared to equivalent aluminum designs, lowering lifetime operating costs.

Higher Thermal Stability: Superior thermal conductivity ensures faster, more uniform heat dissipation from winding hot spots to the epoxy encapsulation.

Compact Footprint: Higher current density capability enables a smaller, lighter transformer for the same power rating, saving valuable installation space.

2. Exceptional Short-Circuit Withstand Capability

High Mechanical Strength: Copper conductors maintain structural integrity under fault currents reaching 25x rated current, preventing winding deformation or insulation failure.

Robust Encapsulation: Windings are vacuum-cast in glass-fiber-reinforced epoxy resin, creating a solid, void-free block with outstanding mechanical rigidity against electromagnetic fault forces.

3. Advanced Cast Resin Technology for Harsh Environments

Moisture & Pollution Resistance: Hermetically sealed windings resist moisture absorption, dust, salt spray, and industrial vapors--ideal for 100% humidity and coastal installations without pre-energization drying.

Flame Retardant & Self-Extinguishing: The epoxy resin formulation does not support combustion and emits minimal toxic smoke, ensuring safety for indoor, high-rise, and underground applications.

4. Low Partial Discharge & Extended Insulation Life

Void-Free Vacuum Casting: High-vacuum processing eliminates internal air bubbles, achieving <10 pc partial discharge levels for long-term medium-voltage reliability.

Thermal Compatibility: Copper and epoxy resin exhibit compatible thermal expansion coefficients, minimizing internal stress during load cycling and preventing micro-crack formation.

5. Optimized Cooling & Overload Performance

Integrated Cooling Ducts: Precision-engineered axial ducts create a natural convection "chimney effect" for efficient air cooling.

Forced Air (AF) Capability: Optional intelligent fan systems enable 50% emergency overload capacity without exceeding insulation temperature limits.

Copper Foil LV Windings: For units ≥500 kVA, foil winding technology enhances short-circuit strength and heat dissipation.

6. Maintenance-Free Lifecycle Value

No Oil Handling: Zero liquid dielectric eliminates costs and environmental risks of oil testing, filtration, and disposal.

Self-Cleaning Design: Smooth, non-porous epoxy surfaces resist dust accumulation and allow easy maintenance.

Corrosion-Resistant Construction: All structural hardware features anti-corrosion treatment or stainless steel for long-term durability.

Applications

Industrial Facilities: Power distribution for motors, pumps, and process equipment in manufacturing plants

Commercial Buildings: Safe, quiet power for lighting, HVAC, and office loads in high-rise structures

Renewable Energy Systems: Voltage conditioning for solar inverter stations and wind farm auxiliary power

Infrastructure Projects: Reliable power for tunnels, railways, airports, and underground substations

Motor Starting & Voltage Correction: Efficient voltage adjustment for heavy equipment start-up

Data Centers: Clean power with low harmonic distortion for sensitive IT equipment

Autotransformer vs. Isolation Transformer

Although both transformers can be used for voltage conversion, an autotransformer and an isolation transformer have different electrical structures and applications.

Frequently Asked Questions – Procurement & Service

Q1: Can this Copper Winding Cast Resin Auto Dry Type Transformer be customized for specific voltage and frequency requirements?

A: Yes. Lugao Power specializes in customized transformer solutions. We can accommodate various primary/secondary voltage ratings, 50/60Hz frequency requirements, and specific tapping configurations to match your local grid standards and application needs.

Q2: What is the typical lifespan of this transformer?

A: Under normal operating conditions following IEC loading guidelines, the insulation system is rated for 20+ years of continuous service. The absence of liquid dielectric eliminates thermal aging concerns associated with oil degradation, and the sealed construction prevents environmental contamination of insulation materials.

Q3: What certifications and documentation are provided?

A: Each Copper Winding Cast Resin Auto Dry Type Transformer is supplied with routine test reports, material certifications, and compliance documentation. Type test reports from accredited laboratories are available upon request. Units are manufactured in accordance with IEC 60076-11, IEEE C57.12.01, and applicable national standards

After-Sales Service & Warranty

Lugao Power Co., Ltd. is committed to customer satisfaction and product reliability.

Warranty Period: 12 months (1 year) from the date of commissioning or 18 months from shipment, whichever occurs first .

Warranty Coverage: Defects in materials and workmanship under normal use and specified operating conditions.

Technical Support: Remote troubleshooting, installation consultation, and commissioning guidance available from our engineering team.

Spare Parts: Critical component inventory maintained to support customer requirements and minimize downtime.