HARMONIC STUDY

What is a Harmonic Study?

A Harmonic Study analyzes the presence and impact of harmonic distortions in electrical power systems, typically caused by non-linear loads such as variable frequency drives (VFDs), UPS systems, LED lighting, and arc furnaces. These harmonics are voltage or current waveforms at frequencies that are multiples of the fundamental frequency (50/60 Hz).

 
Objective of Harmonic Study:

To evaluate the Total Harmonic Distortion (THD) and ensure that the harmonic levels remain within permissible limits, thus:

  • Protecting equipment from overheating and malfunction.
  • Enhancing power quality and system efficiency.
  • Ensuring compliance with IEEE 519-2014 or IEC 61000-4-7 standards.
Purpose of Harmonic Study (per IEEE 519-2014)
  • Maintain voltage and current THD within defined limits.
  • Avoid equipment overheating, misoperation, and premature failure.
  • Prevent harmonic resonance conditions.
  • Optimize energy efficiency and system power factor.
  • Comply with utility and regulatory harmonic guidelines.
Scope of Harmonic Study

Site Measurement

  • On-site harmonic data logging using Class-A Power Quality Analyzer.
  • Real-time waveform capture, THD logging, and event analysis.
  • Determine harmonic injection from:
    • 6-pulse and 12-pulse VFDs
    • UPS systems
    • Arc furnaces and lighting loads
Deliverables from SPTPL:
  • Comprehensive Harmonic Study Report
  • IEEE 519-2014 compliance summary
  • THD plots with bus-wise distribution
  • Detailed filter design & mitigation plan
  • Implementation recommendations
Why Choose SPTPL?

“We ensure that your electrical network is harmonics-free, standard-compliant, and future-ready.”

Our studies are trusted by industries including steel, cement, pharma, oil & gas, and data centers.