HGA 5% Active Harmonic Filter

Maximized Power Factor Correction in a Minimized Space

Variable frequency drives and other types of non-linear loads take the incoming power from the utility and modify it for more efficient use within a wide range of applications. This conversion process creates current and voltage distortion, which can cause major problems throughout the electrical system, such as transformer and distribution equipment overheating, random breaker tripping, and sensitive equipment failure.

The HarmonicGuard Active harmonic filter monitors the load current and reacts to changes in load almost instantaneously. A counter current is injected by the unit to cancel out harmonics and synchronize the current and voltage waveforms. With power factor correction enabled on the filter, true power factor will be returned to near unity automatically.

For ease of use, a large, built-in 65k color touchscreen HMI display with LED backlight is included, along with communication options including Modbus RTU over RS485, EtherNet/IP, Modbus TCP/IP, and DeviceNet.

Fits in Narrow Spots

In a tight spot? The HGA configuration minimizes the space required for harmonics mitigation in the electrical equipment line up, maximizing building space for more productive uses. For example, our 200 A HarmonicGuard Active filter has been re-engineered to have the same form factor as our popular HGA 250 A  and suitable for single door MCC integration.

Additional New Features

  • The 500 Amp rating for larger systems
  • 600 VAC System Compatibility
  • UL Type 3R Enclosure for outdoor environments
  • 208 V and 240 V System Compatibility 
Unfiltered Waveform with Injection Current from the HGA
By actively monitoring the line or load current, the HGA harmonic filter determines the nature and quantity of harmonic currents in the system. It then cancels them by injecting equal amounts of harmonic currents opposite in phase. A state-of-the-art high speed DSP controller and a pulse width modulated (PWM) IGBT based power converter help to provide virtual real time compensation of non-linear load demanded by VFDs and other applications.
Resulting Line Current Waveform
with HGA
HGA also inherently tries to synchronize the line current with its voltage resulting in near unity displacement power factor. Thus, HGA provides solutions for both reactive current and harmonic current compensation.

Technical Specifications

  • TDD Reduction to 5% or better at Full Load
  • Power Factor Improved to near Unity
  • Response time of less than 8 ms to step load changes
  • Units can be paralleled without any calibration
  • Self-Commissioning Installation
  • Meets IEEE-519 2014
  • System-applied – MCC & Switchboard
  • Touchscreen display
  • UL 508 Certified. No SCCR required by UL Standards for the filter.

Typical Applications

  • Wastewater Treatment Plants
  • HVAC Systems
  • Oil & Gas
  • Data Centers
  • Renewable Energy
  • Mining
  • Commercial Buildings
  • Hospitals

Current distortion limits for systems rated 120 V through 69 kV

Maximum harmonic current distortion in percent of IL
Individual harmonic order (odds harmonics) a,b

ISC/IL3≤h<1111≤h<1717≤h<2323≤h<3535≤h≤5050 TDD
<20c4.02.01.50.60.35.0
20<507.06.52.51.00.58.0
50<10010.04.54.01.50.712.0
100<100012.05.55.02.01.015.0
>100015.07.06.02.51.420.0
a. Even harmonics are limited to 25% of the odd harmonic limits above.
b. Current distortions that result in a dc offset, e.g., half-wave converters, are not allowed.
c. All power generation equipment is limited to these values of current distortion, regardless of actual ISC/IL.
where ISC = maximum short-circuit current at PCC.
and IL = maximum demand load current (fundamental frequency component) at the PCC under normal load operating conditions.

Legacy Manuals

The table below includes links to current and legacy active filter manuals. 
The software version of the filter is noted on the About screen, on the HMI display.

IOM EnglishHMI Version on About Screen
Version KHMI Rev K
Version JHMI Rev K
Version HHMI Rev K
Version FHMI Rev J
Version EHMI Rev I
Version BHMI Rev D – H

Quick Start

EnglishEspañolFrançaisHMI version on About screen
Version C
HMI Rev K
Version B
Version B
Version B
HMI Rev I
Version A
Version A
Version A
HMI Rev D – H