Dry-type iron-core series reactor connected ahead of capacitor steps to detune the LC circuit below the lowest harmonic frequency (typically 189 Hz or 210 Hz), preventing resonance and limiting harmonic current amplification. Rated for continuous operation with harmonic and fundamental current loading, with thermal class H insulation and optional thermal switch. Applied in power factor correction banks serving non-linear loads such as VFDs, rectifiers and welding plant.
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Power Quality Solutions
Harmonic Filter Reactors
| Voltage class | LV up to 690 V |
|---|---|
| Rating | 5.67% / 7% / 14% detuning factor; matched to 50–500 kVAr capacitor steps; 400–690 V; linearity to ~1.8× rated current |
| Insulation / medium | Dry |
| Standards | IEC 60076-6, IEC 61558-2-20 |
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