Welcome to the L&T Electrical & Automation blog. It is here that we bring to you updates on technology changes, trends and new applications on control and distribution of electricity in different arenas of human, machines, equipment and gadget interface. We start the series with technical articles on the need for Power Quality solutions.

Harmonics Mitigation in Newspaper Industry

25 January 2018

For harmonic rich environments, where harmonic distortions are very high as against the permissible limits, Active Harmonic Filter is the most appropriate choice for bringing harmonic levels down in accordance to IEEE-519.


Harmonic Amplification & Harmonic Resonance

13 December 2017

In the previous Harmonics article we discussed the basic concepts of harmonics, its causes, its effects and ways of mitigation. In continuation and delving deeper into the topic, let us understand some other important phenomena as well.



09 November 2017

Increasing the efficiency of electrical equipment and thus saving energy and money is of prime importance in today’s world. Most of the energy efficient equipment that we use involve semiconductor devices.


Capacitor Switching in APFC Panels

18 August 2017

Capacitor switching is a critical task in APFC panels because of the high inrush current taken and voltage transients initiated by capacitors at the time of switching. The switching device should be able to withstand both inrush current and voltage transients, along with the ability to carry rated capacitor constantly.


Thermal design of APFC Panels

12 May 2017

The life of the power capacitors and other equipments in APFC panels depend very much on the operating temperature. In panels with detuned harmonic filter reactors and thyristor switches, the chances of elevated temperature are high, as these equipments generate relatively more heat.


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