Harmonic Mitigation Solutions

At AFP Transformers, we produce a wide variety of transformers and associated power accessories including high quality harmonic mitigation solutions. Our harmonic filter inductors are used in conjunction with power factor correcting capacitors in harmonic suppression applications. Harmonic filter inductors come in a variety of sizes, from 600 V to 34.5 kV voltage classes, and are available for single or three phase power systems. Filter inductances are tuned to specifically match their capacitors’ power correction factor (kVAR) rating and have extremely long life cycles when used at their rated current.

Due to the nature of their application, most harmonic inductor filters are custom designed to meet a customer’s specific harmonic mitigation requirements. Engineers can assist customers in the development of a custom solution that will solve harmonic issues caused by power factor correction systems. Inductors are available in iron, ferrite, or air core configurations with aluminum or copper windings and insulation systems in all UL standard ratings up to 220°C.

For additional information about our harmonic mitigation solutions, see the table below, or Contact Us directly.

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Harmonic Mitigation Solutions Capabilities

Product: Harmonic Filter Inductor

Power Type

Single Phase
Three Phase

Voltage Class

600 V
5 kV
15 kV
34.5 kV

Core Type

Air Core
Iron
Ferrite

Winding Material

Copper
Aluminum
Magnet Wire
Foil

UL Insulation System Rating: Up to 220°C

Thermal System Rating: All standard rises up to 115 °C

Inspection

100% Product Testing
IEEE C57.12.91 Special, Standard, or Custom
Testing Parameters Stored

Voltage
Current
Watts
Vars
VA
Power Factor
Efficiency

Applied Potential (HiPot) Testing to 100 kV AC RMS
BIL capability up to 300 kV
Partial Discharge Testing

Up to 100 kV applied potential
In excess of 70 kV induced potential

Customer Specified Testing as Requested

Stocking Programs

Kanban
JIT Shipping
Min-Max
Custom

Production Volume

Prototype
Low Volume
High Volume

Lead Time

3 to 6 Weeks Typical
Expedited Turnaround in as little as 1 Week

Additional Information

Industry Focus & Applications

Switchgear Manufacturers
Motor Control Center Manufacturers
Utilities
Power Factor Correcting Equipment Manufacturers
Power Conditioning Equipment Manufacturers

PDU manufacturers
UPS manufacturers
Voltage Regulator Manufacturers
Data Center CPUs

Industrial Heating Equipment Manufacturers

Furnaces
Induction Heating Power Supplies
RF and Microwave Heating Machines

Mining Machine Manufacturers
Waste Water Treatment
OEM Machine Manufacturers

Machine Toolmakers
Packaging Machines
Semiconductor Machine Manufacturers
Web Processing Machine Manufacturers

Industry Standards

IEEE C57.12.01
General Requirements for Dry-Type Distribution & Power Transformers, Including Solid Cast
IEEE C57.12.91
Standard Test Code for Dry-Type Distribution & Power Transformers
UL 508
UL Standard for Industrial Control Equipment
UL 506
UL Standard for Specialty Transformers
UL 1561
Industry Standard for Dry Type General Purpose & Power Transformers, 600 Volt Class
UL 1562
Industry Standard for Dry Type General Purpose & Power Transformers, Medium Voltage, Up to 34.5 KV
NEMA ST 20
Standard for Dry Type Transformers for General Applications
NEMA TR1
Test Code for Transformers, Regulators & Reactors
NEMA ICS 2
Industrial Standard for Controllers, Contactors, Overload Relays & Related Equipment. (Motor Starting Autotransformers & Reactors)

International Standards
IEC 60076
Power Transformer & Reactors – Medium Voltage
IEC 61558
Power Transformers & Reactors – 600 Volt Class
CE Certification to IEC Standards

Marine Standards
ABS
American Bureau of Ships
DNV
Det Norske Veritas