High Voltage Earthing is one of the hot topics within the electrical system design sector. Sound advice and knowledge can really make a difference in controlling the build-budget. And the number of technical queries (TQ’s) generated. Particularly relevant on the more complicated projects. So selecting the right Electrical Earthing Consultant can make your life so much easier in the long run.[Read more…] about Serious Questions to Ask Before You Hire Your Next Electrical Earthing Consultant. Including Me!
Today is just another day at your local HV substation. Inside, the transformers gently hum and switchgear sit idle. Outside, a neighbour’s neglected tree loses a branch, which clashes with an overhead line. Ask yourself: What happens next? That depends on the substation design and their protection systems, which are the focus of this post.
So, what are protection systems? It’s a system that controls switchgear to detect and correct electrical faults. Generally, combining In a home, the switchgear and protection in a single unit, such as a fuse or MCB. The high voltage world is surprisingly similar, only the switchgear is much larger, and the protection systems are separated.[Read more…] about Making the grade: How well designed is your substation and its protection systems
I thought I’d continue from my last blog piece talking about heavy current injection earth testing. By talking about a key application where it can potentially deliver much better results than the modern CDEGS approach on your earthing arrangements.
Many industrial sites were built in the 1950s and 60s as industrialisation grew. This, in line with the expansion of the electrical grid, led to a huge program of electrical substation construction around the world. What this means is that some of us own the responsibility of managing sites with ageing transformers, assets and equipment. Which were designed to obsolete standards? Therefore knowing what hazard this presents today, is simply not known.[Read more…] about How do I know my 1950’s earthing arrangements are still keeping my workforce safe?
I recently attended a training session with Omicron in Germany, looking at their primary injection test set for earth electrode and line impedance testing. We looked at how to set up a current injection, potentially up to 100 A, down an Overhead line or Feeder cable to achieve good separation between the electrode under test and the auxiliary electrode.
Previously, test methods have relied on dedicated cables for the measurement, which has limited the available area to deploy the auxiliary electrode, owing to land usage constraints and roads. So, being able to use something in a built-up environment on electrically large HV systems avoiding road closures, etc. comes as a breath of fresh air to a lot of engineers facing this problem.[Read more…] about Test large electrode systems using heavy current – for more accurate earth electrode resistance measurements
Firstly I’d like to take this opportunity to wish our Clients, friends, students and Blog subscribers SEASONAL GREETINGS and a very prosperous New Year.
I’m actually in Gibraltar writing this post completing a personal goal of mine. That’s topping up my sailing qualifications in preparation for my exciting challenge later next year to the Southern Ocean competing in the Clipper Round the World Race (more on that next year).[Read more…] about Seasonal Greeting and a Round Up of 2018