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LCL Filters

Overview

LCL Type Harmonic Filter Modules are designed to eliminate input current harmonics generated by motor drives using six-pulse diode or thyristor rectifiers. They provide an effective solution for applications where harmonic current distortion exceeds the limits specified by power quality standards.

  • Complies with IEEE Std. 519-2014 harmonic limits
  • Eliminates low-order harmonics
  • Improves system efficiency and reliability
  • Increases overall system power factor
  • Extends equipment service life
  • Low-loss design
  • Easy installation
  • Resonance-free operation with the supply network
  • Suitable for multiple motor drive applications
  • Cost-effective solution
Hilkar LCL harmonic filter module in a ventilated metal enclosure
M3~GridLCL filterInput filterMotor driveMotor
  • Oil & Gas Industry
  • Water and Wastewater Treatment Plants
  • HVAC Systems
  • Textile Industry
  • Commercial Facilities
  • Data Centers
  • Pulp & Paper Industry
  • Metal Fabrication
  • Electroplating
  • Elevators and Escalators
  • Industrial Rectifiers
  • Induction Furnaces
Input current waveforms measured with and without LCL filter
Motor Drive Input Power

0.3–630 kW

Parallel operation available for higher ratings

Operating Voltage

≤690V

Standard voltages

Operating Frequencies

50 Hz – 60 Hz

Rated Current

1 A – 4250 A

Input Current Distortion

<8%

At full load

Voltage Regulation

<5%

From no-load to full-load

Efficiency

>99%

At rated load

Overload capability

1.6×

Rated current, 1 min/hour

Protection Degree

IP20

Higher protection degrees available on request

Ambient temperature

−30 °C … 50 °C

Maximum Altitude

<1000m*

Standards
IEC 60076 (Reactors)IEC 60871 (Capacitors)IEEE Std. 519-2014 (Harmonics)
Input current harmonic frequency spectrum with and without LCL filter