Harmonic Distortion

  Known as or related to:
Current Distortion
Line Distortion

Nonlinear loads, such as Variable Frequency Drives and UPS systems, reduce energy costs and provide system efficiencies. However, they also create harmonic distortion.

 

Causes of Harmonic Distortion
Non-linear loads are products that draw non-sinusoidal current from the distribution line. This non-sinusoidal current is derived from waveforms that combine the fundamental frequency with integral multiples of that frequency. The resulting harmonic distortion is a basic result of the operation of nonlinear loads. When these types of loads are a significant portion of an electrical system, harmonic distortion may begin to cause problems throughout the entire system.

Indicators of Harmonic Distortion

  • Poor Power Factor
  • Transformer and distribution equipment overheating
  • Random breaker tripping
  • Sensitive equipment failure
  • Voltage unbalance

 

Harmonic Solutions 

After KDR  
After KDR The addition of a KDR Optimized Drive Reactor will limit the inrush current to the rectifier, rounding the waveform, reducing the peak currents and lowering the harmonic current distortion.
Learn more about the KDR
   
After HGP  
HGP The HarmonicGuard Passive not only limits current distortion to less than 5% TDD, it also improves true power factor. Multiple package options result in the right filter configuration for the application.
Learn more about the HGP
   
After HGA  
After HGA By actively monitoring the load current, the HarmonicGuard Active determines the proper current waveform for injection into the system to maintain an acceptable level of harmonic distortion (TDD Reduction to 5% or better at Full Load).
Learn more about the HGA

 

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