It is time to evaluate the energy and cost saving potential of VFD! We all read and hear it in the news daily now: The electricity and gas prices are going up sharply. Some people even talk about “energy crisis”. This phenomenon affects the households as well as industrial customers. Read more…
TGV high-speed train celebrates 40 years European high-speed champion Need for speed was a popular computer game when I was a young boy. When talking about high-speed champions in railway world TGV is the train that surely comes to our mind. In the period of booming individual transport by cars Read more…
Arc resistant design:Introduction Personal safety stands on the top of agenda of many companies. When talking about medium voltage electric compartments then arc fault is one of the main concerns. Uncontrolled electric arc may have devastating impact on the personnel around and of course on the hardware itself. In this Read more…
DC component in VFD transformers Certain VFD topologies may generate direct current (DC) component on the grid side. There is a general concern about how such DC component affects the performance of the VFD transformer. In this post we discuss some basics of DC generation and its impact on transformers. Read more…
Hydro power plant Slapy (CZ) In this article we invite you to discover hydro power plant Slapy in Czech Republic – the first large construction of Vltava cascade after world war II. Slapy is situated in Central Bohemia, approx. 25 km south of the capital Prague. Type of hydro power Read more…
Skoda 9Tr: Impressions from a ride In this post we would like to share some expressions from the ride with historical trolleybus Skoda 9Tr (spelled ŠKODA 9Tr in Czech with a special character above “S” pronounced “sh”). It took place on September 11, 2021 in Pilsen, Czech Republic. The municipality Read more…
How strong is a strong grid? When evaluating the impact of a VFD on the electric grid, particularly the harmonic distortion, we often talk about “strong grid” or “weak grid”. These terms may be a bit vague or at least relative. In this post we try to put the grid Read more…