What factors shall be considered when designing a harmonic filter? Most modern variable frequency drives (VFD) have so high power quality that they comply with the corresponding standards without the need for additional harmonic filtering. Nevertheless, there are cases where Read more
How does a grid harmonic filter work? Recently we got a question in our chat group: How does a grid harmonic filter work? It sounds like a very basic question. However, since many people struggle to imagine the flow of Read more
More than 200 blog posts: Get an overview Since our start in November 2018 more than 200 blog posts in almost 40 different categories have been published. We are thankful for all our readers – regular and random – for Read more
What do the protection function numbers mean? In single line diagrams and other documents depicting protection details you can see various numbers. These numbers are also called ‘ANSI codes’ as they are defined in the ANSI/IEEE standard. What do the Read more
Why do larger drives achieve better efficiency? How does the efficiency of a drive system scale with the power? And why do larger drives achieve better efficiency? That is the subject of this blog post. What is efficiency Efficiency is Read more
What types of VFD grid connection exist? How is the VFD connected to the supplying grid? There are several ways. In this post we look at the conventional ones as well as more specific solutions regarding variants of VFD grid Read more
Cable or busbar? Which one is better? In this article we will have a closer look at the two common power connections in drive systems. Is cable or busbar more suitable? The answer depends on several factors. Power connections 1. Read more
Special offer for our premium subscription, webinars and trainings No Black Friday this year. We have something much better: Our special offer on premium plans, training courses and webinars combined with humanitarian aid. Purchase one of our premium subscription plans, Read more
309 days on site! 309 days…that is exactly how long our rental transformer was on site. This example illustrates the importance of a backup solution when you experience fault of a VFD transformer. It was the beginning of December 2021 Read more
SFC for Power from Shore application In this post we will describe a specific type of SFC grid intertie: Power from Shore (PfS) application. First we explain the background and motivation for the electrification of offshore platforms. Following the introduction Read more