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Filter Reactor

The Filter Reactor is a vital component in power systems, designed to provide superior harmonic mitigation and voltage stabilization across both high and low voltage networks. Its innovative, oil-free design and durable construction ensure outstanding power quality and reliability with minimal maintenance requirements. By working alongside other filtering devices like capacitor banks, the Filter Reactor helps absorb and limit harmful harmonic currents, significantly improving the overall efficiency and stability of the electrical system. This advanced reactor plays a crucial role in protecting sensitive equipment from harmonic distortion, ensuring smooth and stable operation, making it an ideal choice for demanding industrial applications and critical power environments.

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Product Components

Winding (Coil)
Material and Winding Method
Made of copper or aluminum conductors, typically designed with multi-layer segmented winding or air-core structure to reduce distributed capacitance and high-frequency losses.
Insulation Treatment
Wrapped with Nomex paper, mica tape, or impregnated epoxy resin, with typical thermal ratings of Class F (155°C) or Class H (180°C).

Magnetic Core (Iron Core or Air-Core)
Iron-Core Type
Constructed from laminated silicon steel sheets with air-gap design to prevent magnetic saturation.
Suitable for power-frequency or low-order harmonic filtering (e.g., 5th, 7th harmonics).
Air-Core Type
Coreless, relying on self-inductance of the winding.
Offers excellent linearity and strong saturation resistance, making it suitable for high-frequency harmonics filtering (e.g., 11th harmonic and above).

Insulation Support and Cooling Structure
Framework / Support
Made of fiberglass-reinforced plastic (FRP) or ceramic material, securing the winding and isolating it from the core (if present).
Cooling Channels
Natural air cooling for open-winding designs or forced air cooling for high-power models.
Some designs incorporate cooling fins or ventilation holes to enhance heat dissipation.

Tuning Devices (Optional)
Inductance Taps
Adjustable winding taps allow tuning of the inductance to match various filtering frequency requirements.
Adjustable Air Gap
Iron-core filter reactors may include a mechanically adjustable air gap for fine-tuning the inductance value.

Protection and Shielding
Metal Enclosure
Made of aluminum alloy or galvanized steel plates, providing both mechanical protection and electromagnetic shielding to suppress high-frequency radiation interference.
Moisture Protection
Outdoor models may include anti-pollution flashover coatings or a fully sealed epoxy-cast structure.

Connection Terminals
Low-Inductance Design
Copper busbars or bolt terminals, minimizing parasitic inductance effects on filtering performance.
High-Voltage Bushings
Porcelain or silicone rubber bushings for high-voltage grid filter reactors.

Monitoring and Protection
Temperature Sensors
Real-time temperature monitoring of the winding to prevent overload damage.
Overvoltage Protection
Parallel surge arresters or RC snubber circuits to suppress resonant overvoltage.

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Key Differences

Feature	Filter Reactor	Air Core Reactor
Design Objective	Precisely Tune Specific Harmonic Frequencies (e.g., 5th, 7th Harmonics)	Wideband Harmonic Suppression/Reactive Power Compensation/Current Limiting (No Core Saturation)
Inductance Linearity	High (Constant across Full Current Range)	Extremely High (No Core Saturation, Inductance Remains Almost Constant with Current)
Loss Requirements	Very Low (Reduce Losses in Filtering Circuit)	Relatively Low (No Core Loss, but Copper Loss Increases with Current, Requires Heat Dissipation Optimization)
Frequency Response	Narrowband (Targeting Single Harmonic)	Wideband (Inductance Remains Stable, Adapts to Multi-Frequency Harmonic Environment)
Typical Applications	Reactive Power Compensation Cabinets, HVDC Converter Stations, Active Power Filters (APF)	Wind Power Converters, Static Var Generators (SVG), Railway Traction Power Supply

Product Applications

Economy is more affordable

Enhances power quality and reduces harmonics in heavy machinery operations.

Industrial Motor Drives
Supports solar and wind installations by mitigating voltage fluctuations and reactive power issues.

Renewable Energy Integration
Stabilizes voltage in urban and rural grids for reliable energy delivery.

Utility Distribution Networks
Provides clean, stable power for sensitive production lines and high-precision equipment.

Critical Process Industries

Product Advantages

Optimized Harmonic Mitigation

Effectively reduces electrical distortions, ensuring high-quality power delivery.

Maintenance-Efficient Operation

Oil-free, robust design minimizes upkeep and operational downtime.

High System Reliability

Engineered to perform consistently under demanding conditions, enhancing overall system stability.

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.