Harmonic currents result in power that can't be used and which also takes up electrical system capacity. Large quantities of harmonics can lead to malfunctioning of the system that results in downtime and increase of the operating costs.

Harmonics are a problem for a wide number of business sectors and the costs are high and rising as the number of disturbances are increasing and modern production equipment is becoming more sensitive to these disturbances.


  • Fewer production disturbances
  • Lower energy costs
  • Increased equipment lifetime
  • No penalty charges for reactive power or harmonic distortion
  • Lower operating costs
  • Lowered CO2 emissions
  • Reduced energy consumption
  • Fast enough to follow today's dynamic loads (response time < 1 ms)
  • Automatically adapts to changes in load or installation
  • Improves overall power factor
  • Eliminates resonance problems
  • Load balancing
  • Reduces heat and wear on motors, drives and other equipment
  • Frees power supply capacity

Altro Transformers - Harmonics / Power Quality Solution Delta Active Power Filters