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Dry Type Reactor

The Dry Type Reactor (DTR) is an advanced solution designed for efficient reactive power compensation, voltage regulation, and harmonic filtering in both high and low voltage systems. With its innovative dry insulation technology, the DTR eliminates the need for oil-based cooling or insulation, making it an environmentally friendly and safe alternative for various industrial and commercial applications. Its robust, maintenance-free design ensures long-lasting reliability, providing consistent performance even in the most demanding power environments. Ideal for areas where space is limited, the Dry Type Reactor offers a compact, reliable, and safe option for optimizing power quality and enhancing system efficiency without the risks associated with oil-filled reactors.

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Product Components

Winding (Coil)
Core Functional Carrier
Made of copper or aluminum conductors, typically designed in multi-layer cylindrical, disk-type, or air-core structures.
Insulation Treatment
The surface is wrapped with solid insulating materials such as epoxy resin, Nomex paper, or silicone rubber to enhance thermal resistance and mechanical strength.

Support Structure
Framework or Insulating Support
Made of fiberglass-reinforced plastic (FRP) or ceramic, providing mechanical stability and securing the winding in place.
Air-Core Reactor
Lacks an iron core, with the winding forming a hollow structure supported by a frame to prevent magnetic saturation.

Cooling Channels
Natural Air Cooling Type
Heat dissipation occurs through ventilation gaps between winding layers or external airflow passages.
Forced Air Cooling Type
Equipped with fans to force air circulation, suitable for high-capacity reactors.

Enclosure and Protection
Protective Cover or Grille
A metal or non-metal enclosure prevents foreign object intrusion and protects the winding.
Moisture-Resistant Coating
Some outdoor reactors require special treatments to resist humidity and contamination.

Insulation Materials
Interlayer Insulation
Uses mica tape, polyester film, and similar materials to isolate turns and layers within the winding.
Surface Insulation
Epoxy resin casting or impregnation provides an integrated moisture-proof and dust-proof protective layer.

Connection Terminals and Bushings
Copper busbars or cables serve as output terminals.
High-voltage models may use silicone rubber or porcelain bushings to ensure insulation reliability.

Monitoring Devices (Optional)
Temperature sensors (e.g., PT100) and vibration monitors enable real-time condition monitoring.

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Key Differences

Feature	Dry-Type Reactor	Oil-Immersed Reactor
Insulation Medium	Air / Solid Insulation Materials	Insulating Oil
Cooling Method	Natural Air Cooling or Forced Air Cooling	Oil Circulation Cooling (Natural / Forced)
Fire Resistance	High (Oil-Free, Flame-Retardant Materials)	Low (Oil is Flammable)
Maintenance Requirements	Maintenance-Free (No Oil Degradation Issues)	Regular Inspection of Oil Quality & Sealing Required
Size & Weight	Lightweight (Air-Core Design)	Larger (Includes Oil Tank & Oil)
Application Scenarios	Indoor Power Distribution, Subways, Data Centers	Outdoor Substations, High-Voltage Transmission

Product Applications

Economy is more affordable

Product Advantages

Maintenance-Free Reliability

Oil-free, dry design minimizes upkeep and reduces operational downtime.

Superior Harmonic Mitigation

Effectively filters unwanted harmonics, ensuring high-quality power delivery.

Robust and Durable Construction

Engineered with premium materials to withstand harsh operating conditions for extended service life.

WellDone High And Low Voltage Reactor Design Drawing

FAQ

What range of High And Low Voltage Reactor products do you offer and which standards do they meet?

We deliver an extensive portfolio of High And Low Voltage Reactor solutions, including Series Reactors, Air Core Reactors, Filter Reactors, Line Reactors, Output Reactors, Dry Type Iron Core High Voltage Series Reactors, and Dry Type Iron Core Low Voltage Series Reactors. Backed by nearly two decades of industry expertise, our engineering team rigorously designs each reactor to conform with key international guidelines—encompassing ANSI, IEEE, DOE, CSA, AS, AZS, GOST, IEC, among others. Many of our products also carry UL, cUL, and CSA certifications, ensuring they meet stringent global safety and performance benchmarks.
How do you ensure the quality and reliability of your High And Low Voltage Reactors?

Our reactors are manufactured under an all-encompassing quality assurance system that scrutinizes every phase—from the selection of premium materials to exhaustive final testing. Each reactor is supported by a minimum 24-month warranty, reflecting our unwavering commitment to safety, consistency, and long-term performance. This meticulous quality control process has solidified our reputation among international clients and top industry players.
What are your production lead times, customization options, and global market reach?

For our standard reactor models, production typically spans 10 to 25 days. In addition, we provide flexible OEM/ODM services to create tailor-made solutions that precisely match project requirements. Our packaging strategies are adaptable to individual client needs, ensuring safe and efficient delivery. With an expansive global network, our reactors are successfully exported to markets across North America, Europe, South America, Australia, Asia, and Africa. For more detailed information or personalized support, please reach out via email or WhatsApp.