COMSYS ADF – modular active filters
Active filters that adapt – flexible, innovative, efficient

ADF P25

ADF P100

ADF P200

ADF P300

Effective active filters for a stable power supply
PQ ENGINEERING offers a wide range of active filters – from compact 30 A harmonic filters in wall-mounted enclosures to modular cabinet systems with rated voltages up to 690 V. We specialize in the latest generation of voltage-controlled filters.
Protect your power grid and operational processes from critical grid disturbances with an active filter from PQ ENGINEERING:
✔ Harmonics
✔ Inductive and capacitive reactive power
✔ Grid asymmetries
✔ Resonance effects
✔ Flicker interference
Active harmonic filters are divided into current-controlled filters, which can selectively and dynamically compensate multiple harmonics simultaneously, and voltage-controlled filters. The latter also enable broadband filtering of harmonics and supraharmonics. The challenge of reducing rapid voltage fluctuations (flicker) is easily overcome.
Advantages of voltage-controlled filters

Why only measure current harmonics when voltage distortions need to be compensated?
Voltage-controlled active filters are able to To specifically reduce harmonics and interharmonics of the voltageDue to their mode of action, they can work impedance-controlled and so active Dampen resonances.
PQ ENGINEERING offers active mains filters in all power ranges from well-known manufacturers In addition to the current-controlled active filters that are widely used on the market, active filters with voltage regulation our specialty.

Comsys active filter ADF P25
Compact filter for wall mounting (3-wire)

The ADF P25 active filter offers you everything you need in a compact format. Although compact and affordable, the ADF P25 offers the same outstanding performance as the larger ADF P300 or ADF P100 filters. It is extremely efficient and easy to use.
The ADF P25 has a compensation current of 30 A RMS (208…415 V). Its compact design allows the ADF P25 to be used in applications where space is limited.
Characteristics
- Filter harmonics
- Compensate reactive power
- Compensate for asymmetry
- Expandable
Technical data
- Rated voltage 208…415 V
- Filter current 25 A
- Touch display
- Web server
Areas of application
- Decentralized filtering
- Space-saving installation
- marine
- Business
- office building
Comsys active filter
ADF P100 / ADF P100N
Filter for wall mounting (3-wire P100 / 4-wire P100N)
The modular concept is also continued in the wall-mounted filters. This compact filter offers full redundancy in multi-master operation. The ADF P100 and ADF P100N are available with a touch display.

Small compensation systems can be installed decentrally and close to consumers.
Designed in a compact housing for wall mounting and control cabinet installation, with a compensation current of 50…150 A (up to 480 V) and 90 A (up to 690 V).
Characteristics
- Filter harmonics
- Compensate reactive power
- Compensate for asymmetry
- N-conductor compensation (ADF P100N only)
- Expandable
Technical data
- Rated voltage up to 690 V
- Filter current 50…150 A
- Touch display
- Web server
Areas of application
- Space-saving installations
- marine
- Business
- office building
- industry
Comsys active filter ADF P200
Active voltage-controlled broadband filter

Our special PQE hMF-ABM+UBM design allows for the reduction of interference up to 15 kHz. Ideal for clock frequency interference and high-frequency resonance points.
Characteristics
- Filter harmonics
- Dampen resonances
- Supraharmonics down to 5 kHz
- Expandable with additional modules
- Low-loss compensation
Technical data
- Rated voltage up to 440 V
- Filter current 120 A
- Web server
- Voltage-controlled control
Areas of application
- Space-saving installations
- marine
- Business
- industry
- Power plants
- Local network stations
Comsys Active Filter ADF P300
Current/voltage controlled active filter

The modular filters can be easily expanded later. Their high protection rating also makes them suitable for harsh industrial environments.
Characteristics
- Filter harmonics
- Compensate reactive power
- Compensate for asymmetry
- Compensate for flicker
- Expandable
Technical data
- Rated voltage up to 690 V
- Filter current 120…450 A
- Touch display
- Web server
- Protection class up to IP54
Areas of application
- Business
- industry
- Power plants
- Applications with high filter requirements