Line Reactors

MSI Line ReactorLine Reactors

Line reactors are AC inductors used to filter out current spikes, protect sensitive equipment such as variable frequency drives, and provide some short circuit protection in a power system. They can also be used to filter out high frequency harmonic currents above the fundamental mains frequency of the power system.


  • Up to 25 kV class, 125 kV BIL
  • Customer specified impedance, 3% and 5% standard
  • Magnetic Specialties core leg construction results in quiet construction
  • Quiet operation under full load conditions means a long and reliable lifespan
  • Core legs built with multiple small gaps to reduce core loss
  • Aluminum or copper windings



  • UL Recognized insulation system (Primary must be 600V or less). MSI UL Insulation systems are available in 130°, 180° and 220°C ratings
  • CE marking with declaration of conformity ROHS and Low Voltage Directive where applicable
  • Private labeling with customer supplied nameplate artwork. Units that are private labeled cannot carry our UL label
  • Mechanical design can be tailored to fit an existing enclosure. NEMA 1 (indoor) or NEMA 3R (outdoor) enclosure with ANSI 61 gray powder coat finish
  • Final Test Reports with optional Certificate of Compliance



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