Wednesday, November 23, 2005

Refresh course - harmonics

LPQI is pleased to offer a webcourse on harmonics in 3 sessions.

Session 1 - basics

Harmonic currents arise from the use of non-linear loads, comprising in the first place electronic devices which did not exist until some 20 years ago. These load the power systems of buildings in a  different way than the traditional ohmic, inductive and capacitive loads do. This has 10 effects altogether, 6 of which may occur on any system and  another 4 which are typical of TN-C and TN-C-S wiring systems only. This
first presentation describes these 10 detrimental effects and gives some suggestions for remedial measures.

Session 2 - standards

The second presentation of this series will describe that the present attempts at solving these new impacts with  standards have largely failed. You will learn why the majority of those  standards are not really
adequate.

Session 3 - case studies

The final presentation will give some practical examples, highlight some special and uncommon power quality impacts and a  few uncommon niche applications to solve PQ problems.

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