Pearl Electric is an experienced dry type transformer manufacturer and supplier specializing in cast resin, VPI and medium voltage dry type transformers for industrial, commercial and renewable energy applications. Our three phase dry type transformers are available with customized voltage, capacity, winding and enclosure configurations, supporting applications including substations, data centers, solar power, wind power, mining, rail transit and other critical infrastructure projects.
Our dry type transformer solutions are designed for reliable operation, low maintenance and high fire safety, with customized designs available for different installation environments and electrical requirements.
High Performance Three Phase Dry Type Transformer
As a high performance dry type transformer, epoxy resin vacuum impregnation ensures robust insulation. Polyester film delivers excellent electrical insulation and mechanical strength, while mica tape offers superior thermal resistance — ideal for three phase and medium voltage dry type transformer applications.
Fire-Safe Dry Type Distribution Transformer
Non-flammable and self-extinguishing properties make our dry type distribution transformer and dry type isolation transformer ideal for installations with stringent fire safety requirements — from data centers to underground mining sites.
Low Maintenance Resin Cast Transformer
Designed for durability and minimal upkeep, our cast resin dry type transformer and epoxy resin transformer ensure long-term reliability with virtually zero maintenance — even in harsh industrial environments.
Transformer standards and energy efficiency requirements
IEC 60076 | ANSI/IEEE C57 | BS | NEMA Standard EU Regulation 548-2014 Eco-design Tier 2 | DOE 2016 Standard
Dry Type Transformer Product Range
Cast Resin Dry Type Transformer | Medium Voltage Isolation Transformer
As a medium voltage dry type transformer and dry type isolation transformer, it features IP21 rating, anti-corrosion coating, and dust-proof mesh, withstanding sandstorms, salt mist, and humidity. Class H insulation (180°C) ensures reliability in extreme climates with zero maintenance. Applications: This 3 phase dry type transformer is critical for desert power plants, coastal industries, subway tunnels, and offshore oil platforms—delivering stable power even in sandstorms or humid conditions.
Product Intro: As a traction transformer and dry type step down transformer, it's engineered for variable-frequency drives and DC traction, handling harmonic currents and voltage swings. Reinforced windings resist vibration. Applications: Essential for metro/railway traction power, mining equipment, and electroplating lines—guaranteeing stable power for heavy-duty cycling loads.
Marine Transformer | Epoxy Resin Dry Type Transformer for Ships
Marine dry-type transformers feature superior protection and robust environmental adaptability. Engineered with cast-resin insulation rated for marine conditions (moisture, salt spray, and mold) alongside an oil-free, flame-retardant design, they eliminate fire hazards and dielectric fluid leakage. Featuring a compact footprint and high IP-rated enclosure, their reinforced structural design ensures resistance to shock, continuous vibration, and pitch/roll motion, making them ideally suited for space-constrained and demanding shipboard environments. Applications: Widely deployed across vessel and offshore platform power systems, these transformers serve electric propulsion drives, auxiliary distribution boards, and voltage stepping for heavy-duty machinery, ensuring uninterrupted power distribution and load management shipwide.
Mining Transformer | 3 Phase Dry Type Transformer for Underground Use
Mining dry-type transformers deliver exceptional operational safety and environmental adaptability. Featuring oil-free, flame-retardant Class H/C insulation alongside moisture and corrosion-resistant treatment, they eliminate underground fire hazards. Engineered with a robust, vibration-resistant, low-profile frame equipped with rail wheels, these units absorb mechanical shock and easily navigate frequent relocations across tight mine roadways and under severe operating conditions. Applications:Mining dry-type transformers serve primarily in underground working faces and substations. As the core component of mobile unit substations advancing alongside mining equipment, they deliver stepped-down drive voltage for heavy-duty extraction and haulage machinery, facilitate medium-to-low voltage power distribution, lighting, and ventilation across the mine, and withstand harsh high-dust, high-humidity environments.
Excitation Transformer | Auxiliary Transformer for Generator Systems
Engineered for generator static excitation systems, excitation dry-type transformers deliver superior harmonic mitigation, transient overvoltage withstand capability, and short-circuit strength. Featuring an oil-free, flame-retardant design with Class H/C insulation, they enable close-coupled installation adjacent to the generator to supply stable, step-down excitation power to the rotor windings. Applications: Serving as step-down and isolation power sources for excitation systems in hydro, thermal, and nuclear turbine-generators, synchronous condensers, and heavy-duty synchronous motor drives, excitation dry-type transformers supply regulated voltage and power to rectifier bridges and rotor field windings—ensuring reliable generator terminal voltage regulation, grid reactive power compensation, and industrial drive stability.
VPI Transformer | Vacuum Pressure Impregnated Dry Type Transformer
Using Vacuum Pressure Impregnation (VPI) technology, the windings are fully saturated with solvent-free resin under vacuum and pressure, eliminating air voids and moisture inside the insulation. This lightweight, open-wound design reduces material cost and weight compared to cast resin construction, while still delivering excellent partial discharge performance and long-term dielectric stability. Applications: Applications: Ideal for indoor switchgear, industrial plants, and medium voltage distribution networks where cost efficiency and compact installation matter more than outdoor sealing—commonly deployed in manufacturing facilities, commercial buildings, and utility substations.
Eco Transformer | Amorphous Core Dry Type Power Transformer
Featuring amorphous alloy core technology, this transformer reduces no-load loss by 70% compared to conventional models. Its fully encapsulated epoxy resin design resists moisture and dust, while the oil-free construction eliminates fire risks. Perfect for efficiency-critical applications. Applications: Ideal for commercial centers, data centers, hospitals, and schools requiring 24/7 power with maximum energy savings —especially in Middle Eastern cities with high electricity costs and grid fluctuations.
What is the difference between a cast resin dry type transformer and a VPI dry type transformer?
A cast resin dry type transformer uses epoxy resin vacuum-cast around the windings, offering higher mechanical strength and IP54-level protection—ideal for harsh outdoor or coastal environments. A VPI (Vacuum Pressure Impregnated) dry type transformer instead impregnates the windings with resin under vacuum without a solid cast shell, making it lighter and more cost-effective for indoor medium voltage applications. Pearl Electric manufactures both types depending on your installation environment.
Can a dry type transformer be used for three phase step up or step down applications?
Yes. Our dry type transformer types cover both three phase step up and dry type step down transformer configurations, commonly used in industrial plants, rail traction systems, and renewable energy substations. The step-up or step-down ratio is customized based on your input/output voltage requirements—contact our team for a specification tailored to your project.
Are dry type transformers suitable for mining, marine, or traction applications?
Yes. Unlike oil-filled transformers, dry type transformers have no risk of oil leakage or fire, making them well suited for demanding environments such as mining transformer installations, marine transformer applications on ships and offshore platforms, and traction transformer use in metro and railway systems. Reinforced windings and IP54-rated enclosures ensure reliable performance under vibration, humidity, and salt mist.
How much energy can an eco transformer save compared to a conventional dry type power transformer?
An eco transformer built with amorphous alloy core technology can reduce no-load loss by up to 70% compared to a conventional dry type power transformer using silicon steel cores. This makes it especially cost-effective for 24/7 facilities such as data centers, hospitals, and commercial buildings where electricity costs and grid stability are major concerns.
More Dry Type Transformer Solutions
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