Harmonic analysis is a process of trapping time domain events in frequency domain. In industrial power distribution systems, control compulsions have necessitated increased usage of electronics. This has resulted in distortion of currents & voltages. These distortions can cause a variety of operational difficulties to often loads connected to the system. This analysis helps splitting the distortions into a set of sinusoidal waveforms. The resulting spectrum enables identifying content & severity of harmonics in the system. Advanced data processing algorithms are used for interpreting results to identify the root cause of the difficulties faced by the user.