SERVICE & SUPPORT


Harmonic Analysis

Harmonics in an electrical current are one indication of poor power quality. They cause overheating in electrical components and can damage sensitive equipment, impacting your manufacturing process and assets. Poor power quality can result in:

  • Premature equipment failure
  • Equipment turning on or off unexpectedly
  • Erratic equipment performance
  • Unexpected energized metal—panels or components carrying a charge that shouldn’t be, resulting in a safety issue
  • Overheating of motors or other conducting equipment

If you're experiencing such problems, Emerson technicians can help identify the cause by monitoring your system for harmonics, voltage dips and other disturbances.

Benefits

 

  • Identify power quality problems
  • Reduce nuisance trips
  • Extend equipment life
  • Improve system reliability
Scope


Harmonic analysis is typically conducted as part of a power quality study to identify the source of harmonics and develop a plan for corrective action.

A harmonic analysis study can:

  • Identify harmonic problems
  • Reduce nuisance trips
  • Calculate load flow
  • Identify harmonic distortion problems
  • Identify & analyze telephone interference problems
  • Identify parallel resonance conditions

Once a study is complete, a report will be issued including:

  • Voltage & current harmonic distortions
  • RMS, ASUM, TIF, & I*T values
  • Bus impedances (magnitude & angle) tabulation
  • Violation flags
  • Graphical one-line display of harmonic results
  • Voltage & current harmonic spectrum plots
  • Bus driving point impedance scan curves
  • Updated one-line diagram (optional)
  • Fundamental load flow results
  • Recommendations for corrective action
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