Harmonics Filters

It is widely believed that active harmonics filters (AHF) are very costly and, therefore, are the last choice for power quality solutions. The answer is it depends. Every harmonics mitigation and power factor correction device has its place in the market.

Harmonic distortion has become an increasing concern for facility managers, users of automation equipment and specifying engineers alike. Harmonics not only waste energy, but they reduce equipment life, electrical system reliability, system efficiency and equipment productivity.

• Mission critical facilities
• AC variable frequency drives
• DC adjustable speed drives
• Electronic welders
• Battery chargers
• Fans and Pumps
• Water Treatment Facilities
• Induction heating equipment
• Elevator drives
• 3-phase power supplies
• Any 6-pulse rectifier

• Detail:

  Active harmonics filters provide controlled current injection to remove harmonic current from the source side of electrical system s and reactive current to correct for poor displacement power factor (PF). Active harmonics filters can be applied to a single nonlinear load or many. The nonlinear loads can be mixed types or devices, such as variable frequency drives (VFD), DC motor speed controls (aka DC drives), uninterruptible power supplies (UPS), or thyristor (DC) power supplies, to name a few.