Active filter for harmonic reduction
The core control parts IGBT and DSP are selected from the world's top brands, and the response time is less than 50us
Highly efficient modular design, with sufficient margin, strong overload capacity and high compensation accuracy
Strict mechanism layered design with high dustproof grade performance
With the wide application and development of power electric technologies, there are more and more nonlinear loads in the power system, such as rectifiers, frequency converter, UPS, household applications, LED lights, computer and other equipment. The nonlinear loads will generate harmonics currents and inject them into the power grid, causing distortion of the voltage waveform, thereby causing harmonic “pollution” of the power grid.
Lafaelt active harmonic power (AHF) is a good way to solve the harmonic problem with IGBT. Our active power filter offters a selectable priority function of harmonic filtering, reactive power compensation, and load balancing.



Electrical Power system: used to improve the quality of the power grid, reduce harmonic distortion, and enhance power supply reliability.
In the industrial field, it is widely used in electrolysis, electroplating, water treatment equipment, petrochemical enterprises and other scenarios to help reduce equipment wear and extend service life.
Commercial buildings, such as large shopping malls and office buildings, ensure the normal operation of equipment by reducing power interference.
Medical institutions: In the hospital power supply system, reduce the impact of harmonics on precision medical equipment and ensure equipment stability.
Telecommunication industry: used for base stations and data centers to optimize power quality and reduce signal interference.
Semiconductor manufacturing: Reducing the impact of harmonics on the production process in high-precision production equipment.
Airports and ports: Ensure the stability of the power supply system and reduce the risk of critical equipment failures.
Theater and Stadium: Used for sound and lighting systems to enhance equipment performance and reduce noise interference.
1. Relying on the advanced intelligent monitoring technology, Active Harmonic Filter has the features of faster, smaller, higher performance, simper and faster improvement of power quality.
2. Quick response: the response time of AHF is less than 300us, making the harmonic eliminated before causing harm
3. Highly integrated: The 50A filter has a compact design and is easy to install. In addition, the 600A filter also minimizes the size while ensuring excellent performance.
4. Easy to maintenance: The Active Harmonic Filter benefits from its excellent design, the control unit modularization greatly shortens the repair and maintenance time.
5. Multiple choises: Lafaelt APF have products with various specifications and capacities ranging from 50A-900A.
6. Adaptability: Lafaelt Active Power Filter can compensate for self-interference and automatically change network topology.
Power supply voltage | 380x (1±15%) V or 690x (1±10%) V |
Power supply frequency | 50/60x (1 ±2%) Hz |
Harmonic feature | 2nd ~ 50th orders (Eliminate all or selected) |
Filter degree settings | Each harmonic can be individually set |
Harmonic compensation rate | ≧97% |
Response time | ≦300 us (Full response time ≦10ms) |
Compensation method | Full harmonic compensation, full reactive power compensation, harmonic reactive power co-compensation, or three-phase unbalanced compensation |
Switching frequency | Equivalent 20KHz |
Parallel operation capacity | Up to 5 units |
Compensation capacity | Full compensation within the equipment capacity, if exceeded, compensate with the maximum output capacity |
Protection | Device overcurrent, device over-heat, grid under-voltage, grid phase mismatch, DC busbar under-voltage, overload automatic current limiting protection |
Cooling | forced air cooling |
Power consumption | <3% of the rated output capacity |
Protection clas | IP30 (higher can be customized) |
Operating environment temerature | -10°C~ +45°C |
Color | RAL7021 Black sand pattern (other color can be supplied if required) |
Relative humidity | <90%(25°C) |
Noise | <65dB |
Communication | MODBUS RTU(RS485) Ethernet communication function is optional; upper computer monitoring software is optional |
Current (A) | Model | Installation Dimensions(mm) | Installation Method |
W×D×H | |||
50 | LAF400-50-4 | 500x560x220 | Modular |
75 | LAF400-75-4 | 500x560x220 | Modular |
100 | LAF400-100-4 | 500x560x220 | Modular |
150 | LAF400-150-4 | 500x560x220 | Modular |
200 | LAF400-200-4 | 800 x 800 x 2200 | Cabinet |
250 | LAF400-250-4 | 800x800x2200 | Cabinet |
300 | LAF400-300-4 | 800x800x2200 | Cabinet |
400 | LAF400-400-4 | 1000x1000x2200 | Cabinet |
500 | LAF400-500-4 | 1000x1000x2200 | Cabinet |
600 | LAF400-600-4 | 1000x1000x2200 | Cabinet |
750 | LAF400-750-4 | 1000x1000x2200 | Cabinet |

Model | LAF400-300-4 |
Main Components | LAF400-150-4 acitve filter module *2 (at most 5 modules in a cabinet) |
HMI *1 | |
High accurate sampling current transformers *3 | |
Accessories | cabinet shell, MCCB, surge protector, terminal strip, data line |
| Classify | Title | Download |
|---|---|---|
| AcFee APF Operation Manual V2.1 | ||
| AcFee APF Operation Manual V3.0 |
Leave your contacts and our engineers will help you to find the solution you are looking for.
Hi! Welcome back.
How are you doing?
Let s talk! We’ll provide the perfect solution for you!
Lafaelt Electric is focusing on complete solutions for power quality and energy management. We have excellent quality in designing, researching, producing and manufacturing on Active harmonic filter, Static VAR generator(SVG), Power capacitor, Reactor, Thyristor switch, Dynamic voltage restorer and Active voltage conditioner.
Sales Center Add: No. 1, Xinyan Road, Xinwu District, Wuxi, Jiangsu Province, China
Factory Add:No.1, Xinyan Road, Xinwu District, Wuxi City, Jiangsu Province, China