Harmonic Filter
Harmonic Filter
Harmonic suppression, Power quality, EMI suppression, Passive filter
Technical Data:
- Protection level: IP20
- Rated working voltage: AC380V~480V 50Hz
- Insulation level: Overvoltage category III (in accordance with EN61800-5-1)
- Full load efficiency: greater than 98%
Product Description
A harmonic filter is a device designed to suppress harmonic currents and voltages in power systems. By filtering out higher-order harmonics generated by nonlinear loads—such as variable frequency drives (VFDs), UPS systems, and other power electronics—it helps to improve power quality, reduce system losses, extend equipment lifespan, and enhance overall operational efficiency.
Harmonics can lead to overheating of transformers, misoperation of protection devices, increased energy consumption, and even system downtime. The harmonic filter mitigates these risks by maintaining a clean sinusoidal waveform, ensuring that sensitive equipment operates within its design specifications and that power distribution systems remain stable and efficient.
Compared to basic passive filtering solutions, our harmonic filters are engineered with optimized impedance characteristics, high-performance components, and custom tuning to target specific harmonic orders. This results in more effective attenuation, lower total harmonic distortion (THD), and greater reliability—particularly in industrial, commercial, and mission-critical power environments.
Learn more in our latest blog:
“How Harmonic Filters Improve Power Quality in Modern Electrical Systems“
Typical Applications
In industrial automation systems, a harmonic filter helps stabilize power supply to sensitive equipment, reducing disruptions caused by nonlinear loads like VFDs and servo drives.
For solar and wind inverter systems, the harmonic filter ensures smooth grid integration by eliminating high-frequency harmonics generated during DC to AC conversion.
In data centers and server rooms, harmonic filters reduce total harmonic distortion (THD), protecting servers, UPS systems, and switchgear from overheating and performance issues.
Elevator and rail transit systems benefit from harmonic filters by minimizing electromagnetic interference and improving the efficiency and reliability of traction and control units.
For medical devices and laboratories, harmonic filters ensure clean and stable power, safeguarding precise instrumentation from distortion and interference.
In aerospace and defense electronics, the harmonic filter is essential for maintaining electromagnetic compatibility and operational integrity in highly sensitive, mission-critical environments.
Product Features
- Compared with traditional passive filters, ND series products have a smaller volume and stronger harmonic suppression ability
- When connected to the front end of the frequency converter and filtered by a harmonic filter, the total harmonic current is less than 10% of the fundamental current at full load
- The efficiency is greater than 98%, and the passive harmonic filter provides a harmonic solution with high cost-effectiveness and stable reliability
- As an independent option, it is easy to install into existing cabinets
- This series of filters has been carefully matched with branded frequency converters, suitable for various motor control methods, ensuring stable system operation withoutany adverse effects on the power grid
- It can be used directly with previously installed DC reactances, EMC/EMI filters, etc
- The entire series comes standard with a filtering branch bypass control function, which can be controlled through an external contactor according to actual usage.
Technical Data
- Protection level: IP20 (all series have protective shells)
- Rated working voltage: AC380V~480V 50Hz
- Insulation level: Overvoltage category III (in accordance with EN61800-5-1)
- Full load efficiency: greater than 98%
- Cooling method: AN
- Harmonic filtering effect: Under full load conditions, the total harmonic current distortion rate THDI at the input end of the -10 series product is ≤ 10% (background voltage THDU<2%, grid short-circuit power to installed load ratio>66)
- Environmental temperature (working): Under full load conditions, -25 ℃ to+50 ℃
- Storage temperature: -25 ℃~65 ℃
- Working altitude: 0-2000 meters above sea level
- Relative humidity: 0-95% without condensation
- No load current: less than 25% of rated current
- Applicable standard: IEEE519; GB/T 14549-1993
Circuit Diagrams
Outline Drawing (mm)
Insertion Loss
Insertion loss data for Harmonic Filter is currently unavailable.
If you have specific performance requirements or would like to learn more, please don’t hesitate to get in touch — we’d be happy to help.
Factory and Production Line
Why choose us?
10+ years experience
With 10+ years experience in manufacturing power line filters, we bring deep industry knowledge to every product we create.
Wide Client Base
We are trusted by 1,000+ long-term customers, showcasing our ability to consistently meet and exceed client expectations.
Proven Quality
10,000+ positive feedbacks from satisfied clients attest to the quality and reliability of our products.
Customized Solutions
We offer tailored services to meet the specific needs of our customers, ensuring that every solution is perfect for your requirements.
Competitive Advantage
We prioritize innovation, offering products with excellent performance at a competitive price, ensuring the best value for your investment.
FAQs
Yes, we can provide customization services according to your requirements.
Yes, we offer sample services for testing. （What is the minimum order quantity for the product? Usually, we support a minimum order quantity of one. ）
Typically, our products are made of stainless steel, nickel-plated carbon steel, aluminum, or other specified materials. Additionally, we can accommodate special material requests.
Generally, we provide specific product dimension information on the product page. However, if you require custom dimensions, please contact us.
Yes, we provide global shipping. With convenient international freight services, we can deliver goods to wherever you need.
Typically, for small batch orders, we ship within 1-3 weeks upon receiving the prepayment.
Feel free to reach out to us by submitting an inquiry form or visiting our “Contact Us” page,and we will respond to you within 24 hours.
We accept various payment methods including T/T, letter of credit, and PayPal.
We offer tiered pricing, with more favorable prices for bulk orders.
Shipping times vary depending on the method chosen, but generally, goods are delivered within 7-30 days after dispatch.
We offer various shipping methods including by sea, air, truck, and railway.
For any product quality issues, we will respond within 24 hours and provide effective solutions.
Yes, we offer a comprehensive after-sales service, including a 2-year warranty on our products. You can rest assured after purchasing from us.
Yes, we have a professional technical team and our own EMC laboratory.
Yes, but we will review your qualifications to determine if you can become our distributor.
Yes, we accept OEM or ODM orders.
Contact us to get your quote!
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- Own factory processing
Related Products
Single/Three-phase, 10-30A, 250/480VAC, 50/60Hz
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