Harmonic Detuning Reactors

(Where fitted, Tunes Capacitor Bank below Harmonics)

Harmonic detuning reactors are placed in circuit prior to capacitors to “detune” the capacitor bank to below harmonic frequencies e.g. 5th (250Hz) 7th (350Hz) 11th (550Hz) etc. which are usually caused by power switching devices e.g. Variable speed drives, UPS Systems, Arc Furnaces etc.

  • Type – Dry Type, Air Cooled
  • Tuned Frequency – 189 Hz (7%) detuning
  • Current Rating (Min) – 70 Amps I1, 51 Amps I5, 86 Amps I total, 100A
  • Flux Density – < 0.80Tesla
  • Winding Temp rise – Not more than 40°C
  • Q factor – 38
  • Insulation Class – Class H – 180°C
  • Dielectric Strength – 3kV for 1 Minute to IEC 76/3
  • Core Type – High Permeability silicon Grain Oriented Laminated Core
  • Losses – 86Watts/50kVAr Step
  • Conductor and Termination – Copper and busbar connection.

Mounting

Wiring to reactors is via single flexible lugged cables. Reactors are mounted on non-magnetic brackets (Aluminium) to Eliminate eddy currents and reduce noise and heat loss.