Products

Passive Harmonic Filter

Category:
Passive Harmonic Filter
Nominal operating voltage:

1-Phase : 110 ~ 250 VAC   

 

3-Phase : 380 ~ 500 VAC
Nominal input power rating:

1-Phase : 2.5 ~ 50 kW   

 

3-Phase : 4 ~ 130 kW
Overload capability:

1.5 times the rated current for 60 seconds.
Operating frequency:

50/60 Hz
Total harmonic current distortion:

THDi : <10%  or  <5%
Operating conditions:

Operating Temperature: -10°C to +50°C (14°F to +122°F)

 

Storage Temperature: -40°C to +65°C (-40°F to +149°F)

 

Relative Humidity: Up to 95%, non-condensing

 

Altitude: Up to 1000m (approx. 3300 ft) without derating

 

Mounting: Floor-standing, system integration, or custom configurations

 

Clearance Note: A minimum of 10cm (approx. 4 in) of clearance must be maintained on all sides for proper ventilation.
Standards compliance:

Enables your equipment to achieve compliance with IEC 61000.

 

Helps your facility to comply with the IEEE 519 standard.
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Description
 
Harmonic Filter - Introduction

 

      In modern industrial power systems, the proliferation of non-linear loads has become standard. Devices such as large industrial fans, precision furnaces, Uninterruptible Power Supplies (UPS), industrial-grade inverter air conditioners, and various Switching-Mode Power Supplies (SMPS) are indispensable to production lines. However, their non-linear characteristics cause severe current waveform distortion, generating a significant amount of harmonic currents. These harmonics deviate from the ideal sinusoidal waveform, posing a serious challenge to the stability, efficiency, and reliability of the entire power grid.

 

      Our Passive Harmonic Filter is a high-performance solution engineered to address the issue of harmonic pollution in industrial environments. At its core is a passive circuit composed of inductors (L) and capacitors (C), which we can customize based on your specific data. This circuit creates a low-impedance parallel path within your electrical system, precisely tuned to target specific harmonic frequencies (e.g., 5th, 7th). This design effectively shunts and absorbs distorted harmonic currents from the main circuit, preventing them from flowing back into the grid. Available for both single-phase and three-phase systems, our solutions significantly reduce the system's Total Harmonic Distortion (THD), helping to restore the purity of voltage and current waveforms and ensuring the stable operation and optimized performance of critical industrial equipment.

 

 

Harmonic Filter - Advantages & Value

Improves Power Quality: Significantly reduces harmonic currents generated by non-linear loads, effectively purifying voltage and current waveforms to enhance power supply stability from the source.

 

Extends Equipment Lifespan: Mitigates issues caused by harmonics such as overheating, insulation aging, and abnormal vibrations, reducing losses in critical assets like transformers, motors, cables, and switchgear.

 

Enhances Energy Efficiency: Lowers additional energy losses and line losses caused by harmonics, substantially reducing operational costs and improving the overall efficiency of the system.

 

Prevents Equipment Malfunctions: Suppresses high-frequency electromagnetic interference (EMI), protecting precision instruments, PLCs, and control systems from data errors or nuisance tripping.

 

Mitigates Resonance Risk: A carefully engineered filter avoids parallel resonance with system capacitance, preventing the dangerous amplification of specific harmonics.

 

Ensures Compliance with Standards: Helps your electrical system meet stringent international harmonic standards (e.g., IEEE 519, IEC 61000-3-12), avoiding potential penalties.

 

High Cost-Effectiveness: Compared to active power filters (APF), our passive solutions offer a superior return on investment with a lower initial cost for many industrial applications.

 

Simple and Reliable Design: Composed of durable, passive components (inductors, capacitors) without complex electronics, ensuring stable operation and low maintenance, ideal for harsh industrial environments.

 

 

Harmonic Filter - Application Areas

 

Industrial Automation & Heavy Equipment

• Three-Phase Inverters (VFDs): For large motor-driven equipment in various factory settings, such as fans, pumps, air compressors, and conveyors.

 

• Industrial Robotics & Servo Drive Systems: For high-stability applications in precision manufacturing and automotive production lines.

 

• Welding Machines, Induction Heating & Industrial Furnaces: Power conversion equipment that generates significant harmonic distortion.

 

• Single/Three-Phase Motor Drives: Power sources for various small-scale production lines and automated control equipment.

 

High-Tech & Commercial Facilities

 

• Data Centers & Telecommunication Rooms: For large three-phase Uninterruptible Power Supplies (UPS) and Switching-Mode Power Supplies (SMPS) in server racks.

 

• Large-Scale Commercial HVAC Systems: Inverter-driven central air conditioning and chillers in commercial buildings and factories.

 

• LED Lighting Systems & Electronic Ballasts: Large-scale commercial lighting deployments where the cumulative effect of harmonics is significant.

 

Renewable Energy & Emerging Applications

 

• Solar PV Inverters: From small-scale single-phase residential units to large-scale three-phase grid-tied inverters, ensuring the quality of power fed to the grid.

 

• EV Charging Infrastructure: For AC charging stations (Level 2, single/three-phase) and DC fast-charging stations (Level 3, three-phase).

 

• Energy Storage Systems (ESS): To address harmonics generated by the Power Conversion System (PCS) during charging and discharging cycles.

 

 

For further information or to discuss your specific needs, please feel free to contact us.