Harmonic Filter Reactors

Non-linear equipments generate harmonics as multiples of a fundamental frequency such as ac & dc motor speed controllers, arc furnaces, compact fluorescent lamps, uninterruptible power sources. As a result of this fact, besides the fundamental frequency,3rd, 5th, 7th, 9th ... harmonics are generated.

• Excessive heating effect on electrical distribution equipment and cables
• Increased electrical insulation stress
• Increased noise in electrical motors
• Electronic mis-timings: Computers, fax machines etc.
• Capacitor overloads - premature failure
• Increased maintenance requirements and downtime
• Fluorescent light flickering
• Tripping of thermal circuit breakers unexpectedly


The distortion limits determined by IEEE 519 standard are as follows:
Hospitals and Airports : % THD (V) = 3
Industrial Facilities : % THD (V) = 5
Speed Control Equipments : % THD (V) = 8