Thyristor Switched Automatic Harmonic Filter Panel works on a power supply rate varying from 440 V to 525 V or 850 V. The Harmonic Filter Panel is suitable for fast variable loads, where contactor controlling systems fail to give desired results. The Automatic Harmonic Filter Panel works on automatic mode of operation and the capacitors are switched at zero current cross over threshold. Automatic Harmonic Filter Panel is available in a power range varying from 50 to 2500 KVAR. Thyristor Switched Automatic Harmonic Filter Panel is ideal for all power factor problems.