AIM Europe: Manufactures active harmonic filters and electronic power factor correction equipment.
Beluk Power Factor Control from Illimite & the BLR series of PF control relays: Beluk.com is the home of information on Beluk Power Factor Controllers. Details on individual models and power factor correction theory are included.
Commonwealth Sprague Capacitor, Inc.: Manufacturer of low and medium voltage power factor correction capacitors, harmonic filters and motor run capacitors.
Cos Phi Inc.: Designers and manufacturers of power factor and power quality correction equipment for industry.
Electenergy Technologies Inc.: Energy saving and power conditioning system.
Enspec Power Ltd: Manufacturers of power factor correction equipment and harmonic filters. Specialists in power quality and high voltage engineering.
Hale Instruments Ltd.: Specialists in power factor capacitors, motor capacitors and obsolete electronic components. Based in Altrincham UK.
Mesta Electronics, Inc.: Digital power factor and harmonic managers.
MTE Corporation: Designer and manufacturer of line and load reactors, broad band harmonic filters and DC link chokes with information on products and technical articles.
Myron Zucker, Inc.: Manufacturers of power factor correction capacitors and harmonic filters.
Northeast Power Systems, Inc. (NEPSI): Manufactures custom-engineered power factor correction equipment and harmonic filters.
Phaseco, Inc.: Provides design, engineering, equipment and installation services for power factor correction capacitor and harmonic filter systems to the large industrial, commercial and manufacturing industries.
Phasetech Ltd: Power factor correction equipment. From UK.
Power Capacitors Ltd: Power factor correction equipment and single to three phase convertors. From UK.
Power Correction Systems, Inc.: Manufactures harmonic power correction filters.
RCCS: Distribution power factor correction and VAr/voltage control.
Steelman Industries: Electric power capacitors, capacitor cabinets and boxes also power factor correction capacitors.
Syscon: Manufacture of equipment that maintains the quality of power with information on products, client list and company profile. From India.
Yuhchang Electric Co., Ltd.: Manufacturer of power capacitor, automatic power factor regulator, series reactor and rechargeable lead calcium battery. From Taiwan.