VLT® Advanced Harmonic Filter AHF 005 / AHF 010

Optimize harmonic performance

Advanced Harmonic Filter AHF 005/010 is a cost-effective total solution, the package  combines the reliability and performance of VLT® Series drives with the innovative technology of AHF Series Filters.

Compared to traditional harmonic trap filters AHF offers a smaller foot print and higher harmonic reduction.

The solution is available in two variants, AHF 005 and AHF 010. When connected in front of a Danfoss VLT® drive, the harmonic current distortion generated back to the mains is reduced to 5% and 10% Total Harmonic Current Distortion at full load.

With a >98% efficiency the passive Advanced Harmonic Filters offer cost effective and very robust harmonic solutions specifically for power up to 250 kW.

As stand-alone options the Advanced Harmonic Filters feature a compact housing that is easily integrated into existing panel space. This makes them well-suited for retrofit applications with limited adjustments of the frequency converter.


Line Voltage
380-415 VAC (50 Hz)
440-480 VAC (60 Hz)
500-525 VAC (50 Hz)
690 VAC (50 Hz)

Enclosure Rating
Chassis (IP00)

Overload Current
160% for 60 seconds


True Power Factor
0.85 @ 50% load
0.99 @ 100% load

Ambient Temperature
41º-104º F (5º-40ºC) without derating

Features and benefits

Designed for matched performance with Danfoss VLT® Series drives

User-friendly startup; no adjustment necessary

Requires no routine maintenance

Protects multiple drives with one filter

Designed to address the current distortion limit guidelines of IEEE 519-1992

AHF 10 has THiD < 10%; equal or superior performance and cost competitive compared to 12-pulse rectifiers

AHF 05 has THiD < 5%; equal or superior performance and cost competitive compared to 18-pulse rectifiers