Dynamic Harmonic Filter DHF

Complete Technical Specifications

The DHF is a new technology introducing a Voltage Controlled Active Filter which can not only correct harmonics generated within an industrial facility but also harmonics generated elsewhere and transmitted into the facility via the electrical utility supply.

When THD is high and outside correction capability of AHF units or when harmonics are generated by neighbouring industrial plants and are transmitted via the utility network.

Typically used in Automotive factories or other industries with large numbers of VFD’s, robots or automation.

Uses voltage control only and does not need any CT’s.

Corrects the system bus not just the facility loads

Available for 60Hz at 208V, 480V and 600V and at MV to 15kV.

Available at 50Hz at 200V,400V,690V and MV to 11kV

Standard NEMA 1 enclosure, NEMA 3R available

DHF 5 for correction 5th harmonic

DHF 7 for correction 7th harmonic

DHF 11 for correction 11th harmonic

Filters maybe combined into one unit

No detailed power quality study required

Very Low losses compared to traditional harmonic filters

Rugged Industrial design floor mounting

Compact space

No CT’s

Simple installation and maintenance


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"The results were dramatic. Productivity losses from sags with the protected saws were reduced to zero. I can say with absolute confidence the payback was well under a year. Now my only problem is that production managers want to know why we didn’t protect the rest of the wire saws with the AVC. Every time a thunderstorm appears in our area, we have to shut down the unprotected saws until the storm passes.”

Silicon Wafer Production - Plant Engineer

Power Quality 101

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