A good power quality is a condition that ensures safe and stable operation of equipment connected to a power source. To minimize the risk of lost production and damage to electrical equipment, power quality analysis is used to monitor a system for problems, find the cause, and initiate corrective action.

Issues that affect Power Quality

  • Voltage Sags and Surges
  • Harmonic Distortion
  • Transients
  • Electrical Noise
  • Power Interruptions
  • Unbalance, etc


Power System Harmonics are sinusoidal voltage and currents at frequencies that are integer multiples of the main generated (or fundamental) frequency.

Harmonics are generated by non - linear loads in the power system. Harmonic currents can interact adversely with a wide range of power system equipment such as transformers, capacitors, motors, transmission system, communication devices, etc causing overheating, overloading, additional losses, errors in power metering, malfunction of equipment.

By conducting harmonic analysis, parameters such as voltage and current harmonics (1st to 50th Order) can be analysed and mitigated by implementing a proper solution.

Sources of Harmonics

  • Uninterruptible Power Supply (UPS).
  • VFDs, VSDs, DC Drives and other electronic drives
  • Equipment using SMPS like computers, TV, etc.
  • Battery Chargers
  • Programmable Controllers.
  • Frequency Converters, Rectifiers, etc
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