AFP Transformers, LLC, designs and manufactures Harmonic Filter Inductors for the power factor correcting and harmonic suppression industry. Our broad product line of harmonic filter inductors ranges from small single or three phase, low voltage units to large single-phase devices typically used in medium voltage applications. Harmonic Filter Inductors are also referred to as Harmonic Filter Reactors or Tuning Reactors. These products differ from other types of inductors, reactors or chokes in their design and construction characteristics.

A Harmonic Filter Inductor is often wrongly referred to as a line reactor. These are two vastly different products. A Harmonic Filter Inductor is designed and manufactured to be installed and packaged with Power Factor Correcting capacitors. As a result, the Harmonic Filter Inductor has amongst its design characteristics a large consideration for harmonic currents. It is most common to have harmonic current ratings greater than the fundamental 60 Hz current rating. "Harmonic compensated" line reactors are typically designed for a maximum of 20% harmonic current flow (or less) continuously.

Features for AFP’s Harmonic Filter Inductors are:

• Copper windings;
• Balanced core and coil heating;
• Less than 20% of watts loss as a result of fringing (also referred to as "Gap Losses");
• Inductances tuned to specifically match capacitor KVAR ratings;
• 200 C insulation system rating as a minimum. Most designs utilize 220 C insulation system;
• 115 C maximum temperature rise. 80 C and 100 C rises also available;
• 20 year operating life expectancies when used at the rated current values.

AFP has Harmonic Filter Inductors available in a few "standard" sizes and models; but most applications require a product specifically designed for your application. For further information regarding AFP’s Harmonic Filter Inductors, please click on the pdf downloads or contact AFP Transformers via phone: (732) 248-0305, fax (732) 248-0542 or email: info@afp-transformers.com.

Under construction