• Active Harmonic Filter
  • active power filter
  • harmonic control
Active Harmonic Filter (APF)

Active Harmonic Filter (AHF)

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

Description

Advantages

Parameters

Selection

Download

Overview

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.

Working Principle



Compensation Effect


Application


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.




Advantages

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.

Technical Parameters

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 RTURS485 Ethernet communication function is optional; upper computer monitoring software is optional



Active Harmonic Filter Specification

Current

(A)

Model

Installation Dimensionsmm

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



Installation Dimensions

Installation dimensions

400V 300A Active Harmonic Filter 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


back

Need Any Help

Leave your contacts and our engineers will help you to find the solution you are looking for.

Contact us for further information

The content with * is required

Related Products

0

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.

Copyright © 2022 Jiangsu Lafaelt Electric Co., Ltd.            Privacy Policy Powered by Bontop