Load and Harmonic Analysis

What is a Load and Harmonic Analysis?

Carrying out Load and harmonic analysis, is a way of measuring and reviewing the characteristics of an electrical system to predict, identify and ultimately prevent possible issues associated with high level harmonics.

This involves connecting a power analyser to the supply, and monitoring it for a minimum period of one week, to review the sites load and collect data on the day to day running of the building.

This collected data includes but is not limited to:

  • Harmonic Distortion levels (THD)
  • Individual Harmonic frequencies levels
  • General Power Quality levels
  • Transient Voltages
  • Voltage Dips

What are Harmonics and how are they produced?

Harmonics in an electrical system mean that current and voltage are distorted and deviate from sinusoidal waveforms.

Harmonics are produced by an electrical load that draws current not directly proportional to the voltage referred to as Non-linear loads. An example of this type of load include:

  • Inverter drives
  • DC Drives
  • Uninterruptable power supplies (UPSs)
  • IT Equipment

What can I do to reduce Harmonics?

Following on from an harmonics analysis of the sites supply, Active Harmonic Filtration (AHFs) can be implemented to help minimise the distortion.

They work by putting harmonics back into the electrical system in an equal and opposite measure to the existing harmonics. AHFs can be designed to target all harmonics or just the harmonics that are causing a specific issue to site.

As part of the load and harmonic analysis report we can provide a complete, no-obligation quotation for installing Active Harmonic Filtration as required.

If you wish to arrange a week long load and harmonic analysis please feel free to contact us.