AC Line Chokes

Input reactors are used between variable speed drives and utility. They're used to dampen the harmonic content and rush of the current drawn by the motor drive.

Line Chokes are used to protect your drive from harmful line disturbances. Our reactors help prevent equipment failure and down time & can add years to the life of your Drive.

  • Reduce nuisance over voltage tripping of the Drive due to transient voltage spikes and power line notches
  • Improves input line current balance on the Drive input when the line voltage is unbalanced
  • Offer in-rush protection to input rectifiers caused by sudden power line surges or sudden changes in the motor load
  • Offer reduction of input line current harmonics by reducing the current form factor thereby improving power factor
  • Reduce ripple current in the DC bus capacitor bank thus extending their life
Line Choke Specifications
  • Rating Range : 0.15 kW - 1200 kW
  • Type : Single/Three Phase
  • Input Voltage : 110/230/415/440/480 V AC
  • Current Range : 1-2000 Amps
  • Imax : 150%
  • Impedance : 1.5/2/3/4/5 %
  • Frequency : 50/60Hz
  • Applications : VFD - ABB, Siemens, Fuji, Allen Bradlley, Mitsubishi, Yasakawa, Danfoss, LG
  • Protection Class : I
  • Insulation Class : F & H
  • Ambient Temp : 40°C
  • Construction : Single Winding/Safe-Touch Terminal/Vacuum Pressure Impregnation/Earthing Terminal
  • Testing : Full Current Injection/150% Linearity Test/Voltage Drop Test/Winding Resistance Test/Heat Run Test/H.V. Test/Megger Test
  • Power supply with high frequency transients such as voltage surges, line notching, pulsed distortion and harmonics
  • Drive supplied by a low impedance line. If the KVA rating of the Ac supply transformer is greater than ten times the input KVA rating of the drive, a 5% input line reactor should be added.
  • Power supply with phase unbalance greater than 2% of the voltage. An unbalance greater than 2% can shorten the life of drive and results in severe damage to drive power components.
  • Installation having more than two drives installed on the same power line. Multiple drives on a common power line require one reactor per drive to reduce cross talk.