Harmonics are products in power networks, when loads connected to them are non-linear, the sources being Static Converters, Variable Frequency Drivers and Rectifiers devices with Switch Mode Power Supplies such as computer monitors, telephone systems, printers, scanners and electronic lighting ballasts.

Impendence of the capacitors decreases drastically for higher harmonic currents, presenting the shortest path for them. The effect of the non-linear and time varying loads can be further amplified by resonance conditions, which will cause distortion of supply voltage in the network. These harmonic currents added to the fundamental current products dangerous overloads on the capacitors, leading to premature failure.

Harmonic currents cause data corruption in computer networks, contamination of audio & video signals, overheating and premature failure of motors. All these lead to poor utilization of power. It is mandatory to keep these harmonic disturbances to an acceptable level.

Harmonics Measurement
To find the best solution for Power factor compensation in such an installation, it is necessary to assess the Harmonic Distortion level. We are equipped to carry out onsite measurement of various parameters including voltage & current Harmonics, recorded over a reasonable period of time to make a fairly accurate analysis.

Standard Ratings
Dhandapani offer 5, 10, 15, 20, 25, 50 kVAr Reactors for Detuned Filters to Suit the Similar ratings of Capacitors enabling connection of a Reactor to each Capacitor in a Filter Bank. The Reactors for Detuned Filter are designed to take 35% overload that the normal current flowing through them.