Renowned professors and representatives from business/industry will speak at the Swiss T&D Days 2023.

Speakers Day 1

Dr.-Ing. Jürgen Bernauer 

CEO, PFIFFNER Group, Program Lead 

Dr. Jürgen Bernauer is an expert in electrical engineering and high-voltage technologies within the global power industry. With over 22 years of experience at ABB, he has held numerous positions in turnkey substations and has been serving as the CEO of PFIFFNER Group since 2019. Jürgen Bernauer boasts an impressive portfolio of over 20 technical papers on Electromagnetic Compatibility. He is an esteemed member of IEEE Power & Energy Society and the EMC Society. He actively supports business start-ups as a member of the Business Angels in Switzerland. As a graduate of the renowned Karlsruhe Institute of Technology in Germany, he holds a special place in the institute’s community.

Prof. Dr. Martin Geidl 

FHNW University of Applied Sciences and Arts Northwestern Switzerland, School of Engineering, Switzerland 

Prof. Dr. Martin Geidl studied electrical engineering at the Graz University of Technology and earned his doctorate in the same subject at ETH Zurich. He gained practical experience at Swissgrid and Tiko Energy Solutions. Since 2018, he is Head of the Institute of Electrical Power Engineering at the University of Applied Sciences Northwestern Switzerland.

Challenges to the electrical grids of the future from a system perspective

In the 150-year history of electrical energy supply we have developed large interconnected systems that supply our countries with electricity in a reliable and cost-effective way. The great challenge of our time is to transform existing systems in a way that infrastructure, power generation and energy use become more sustainable. We can only meet these challenges if we find new solutions for the storage of energy, for making consumption more flexible, and for digitalization and automation at all levels.

Prof. Dr.-Ing. Stephanie Uhrig

University of Applied Sciences, Munich, Germany

Prof. Dr.-Ing. Stephanie Uhrig, née Rätzke, received her doctorate in 2009 on the topic of “On the mode of action of nanoscale filler particles in polymer insulating materials for high-voltage technology” at the Chair of High-Voltage and Plant Engineering (Prof. Dr.-Ing. Josef Kindersberger) at the Technical University of Munich (TUM). From 2010, she worked as a product manager for OMICRON Electronics, a manufacturer of measurement and diagnostic devices for power engineering equipment. Her focus was the diagnosis of ageing phenomena in insulations of various equipment and targeted fault detection in power transformers. Since 2017 she is Professor at Munich University of Applied Sciences and a founding member of the In-Institute ISES, the Research Institute for Sustainable Energy Systems. Her research focuses on fault diagnostics of/on ageing operating equipment in the power supply chain and control of flexible loads in the distribution grid. She is a member of VDE ETG Q2 and Convener of CIRED WG 2020-1.

Options for extending the service life of primary equipment

This paper reports about the results of the CIRED workgroup 2020-1. Electrical plants are of high economic value and therefore should have an operational lifespan of more than/at least four decades. Yet within the necessary grid expansion it will not be possible to permanently renew the primary equipment. Therefore we need to know about possibilities concerning of expanding the operational lifespan. For this purpose, efficient strategies such as maintenance measures, diagnostics or targeted partial renewal are considered, but limits are also considered and practical examples are presented.

Prof. Dr.-Ing. Andreas Küchler

Technical University of Applied Sciences Würzburg-Schweinfurt (THWS), Germany

Dr.-Ing. Andreas Küchler is professor, scientist and book author on the topic of high voltage technology, with international activities in CIGRÉ, IEEE and ETG. He received his PhD in Karlsruhe, was Head of R&D at HSP Hochspannungsgeräte in Cologne and founder of high-voltage engineering research at THWS Schweinfurt.

Challenges to insulation systems for DC voltage

High DC voltage applications are becoming increasingly important, but they present completely new challenges for electrical insulation systems that are not known for AC voltage. The formation of DC electric fields, their influence by temperature gradients, the instability of material properties, critical loading scenarios and testing strategies require a fundamental rethinking. Approaches for a safe and economical design of insulation systems for converter transformers, bushings, cables and accessories, among others, are presented.

Prof. Markus H. Zink

Technical University of Applied Sciences Würzburg-Schweinfurt (THWS), Germany

Professor Markus H. Zink is Head of the Institute for Energy and High Voltage Technology and the High Voltage Laboratory at the Technical University of Schweinfurt. His focus of research are the condition assessment of electrical insulation systems and dielectric properties of insulation materials for HVDC applications.

Transient Behaviour of HVDC Insulation Systems

A fundamental understanding of the conductivity, polarization and space charge processes is necessary to safely design HVDC insulation systems for future applications with ever-increasing requirements. In particular, the transient behavior of the insulating systems in the transition from the displacement field to the flow field and, thus, the behavior of the insulating materials need to be investigated more carefully. In this respect, research is being carried out at IEHT using, among other things, a system that can simultaneously measure the electric field strength using the Kerr effect and that can measure the current through the insulating system.

Dipl. Ing. FH Stefan Kuehnel

Zittau/Görlitz University of Applied ­Sciences, Germany

Dipl. Ing. FH Stefan studied energy engineering at the University of Applied Sciences Zittau/Görlitz where he has been working as a research associate in the field of high voltage technology since 2012. His focus of research is surface behaviourof polymer insulating materials under DC and AC load and under foreign layer load. Since 2016 he is PhD student in a cooperative doctoral program with the TU Dresden.

Materials in insulation technology, in particular, their erosion and tracking resistance

The presentation will first give a brief overview of the require­ments for insulating materials for high-voltage engineering, especially for outdoor applications in the medium- and high-voltage grid. The material property of erosion and tracking resistance of polymeric insulating materials will be discussed in detail, and future challenges due to the increased use in HVDC applications will be pointed out. A central point is a current research into developing a test method for determining erosion and tracking resistance for DC voltage applications.

Dipl. Ing. ETH/HTL Antoine Pochon

Head of Grid Strategy, Swissgrid AG, ­Switzerland

Antoine Pochon is a graduate engineer at ETH/HTL in electrical engineering. He started his career in 1993 at ABB in the area of protection systems and power electronics. He then held various positions at Groupe E, Alpiq and Romande Energie. Since 2020, he has been Head of Grid Strategy at Swissgrid.

Role and development of Swissgrid’s Swiss transmission network 

The electricity grid and secure grid operation are essential prerequisites for Switzerland’s high quality of life and prosperity. The demands on the power grid have changed significantly in recent years. This development will intensify with the energy transition in the coming decades. A grid that is expanded to meet demand is essential for Switzerland’s long-term security of supply. It is, therefore, important that efficient approval and authorization procedures accelerate the modernization of the transmission grid.

Dipl. Ing. Christian Lindner

Head of Engineering, Axpo Grid AG, Switzerland

Dipl. Ing. Christian Lindner graduated in electrical power engineering from the Vienna University of Technology in 1990 and received his MBA from the University of Zurich in 2020. From 1991 he was project manager for the development of high-voltage circuit breakers at ABB, and from 1996 to 1999 he was head of the R&D department for HV-AIS circuit breakers there. He then joined ABB Management AG in Oerlikon, where he was assistant vice president for worldwide R&D and marketing for high-voltage switchgear. From 2002, he was Vice President R&D at Areva T&D in France. Since 2007, he has been BU head for grid engineering at Axpo. He is President of FKH and member of the CIGRE National Committee of Switzerland and representative of the SC A3.

A way towards a CO2 free substation

HV substations have a CO2 footprint due to the different HV products, due to civil works and electric losses. In his presentation he describes the various sources of direct and indirect CO2 emissions from a grid operator’s perspective. The focus is to reduce the CO2 footprint in the operational phase and with the right choice of technology. Therefore, environmental parameters are becoming key in the selection of the product. SF6-free solutions are available, but this technology represents a minor fraction of the CO2 footprint of a substation. Therefore, different ways to finally become CO2 free must be found.

Dr. Florian Martin

Head of Asset Management / Asset Technology, TenneT TSO GmbH, Germany

Dr. Florian Martin studied electrical engineering, electrical systems engineering and high-voltage engineering. He obtained his engineering diploma at the University of Karlsruhe (TH) 2003. By 2008, he had completed his doctorate on the topic of “High Voltage Test System based on Power Electronic Frequency Converter” as part of a cooperation between HighVolt and the Karlsruhe Institute of Technology (KIT). Since then, Florian Martin has worked for TenneT TSO GmbH (formerly E.ON Netz). Initially, as a specialist in electrical power factor correction in substations. In 2013 Mr. Martin moved to management and has since been responsible for various technical areas. Currently, Dr Martin is Head of Corporate Asset Technology in Asset Management and, together with the department, is responsible for all guidelines for technical energy transmission systems that TenneT TSO uses in the Dutch and German onshore and offshore grids regarding primary and secondary technology.

Challenges and Innovations in the Context of the Energy Transition from the Perspective of a German Transmission System Operator

The German transmission grid for climate neutrality was presented for the first time in 2023 as the target grid for 2037/2045. In addition to grid expansion on- & offshore AC and DC, innovative resources are required to ensure grid stability. The challenges in planning, realization and operation of the current and the target grid will be shown in the presentation. A focus will be put on the prerequisites and the anticipated developments in the power sector. Innovations on the resource and supply chains will be discussed while maintaining the concrete project reference.

Dr. Andreas Kühner

Head of Grid Development Projects, Netze BW GmbH, Germany

Dr. Andreas Kühner is Head of Network Development Projects, Netze BW GmbH, Germany. He has 25 years of professional experience in the energy industry in various management positions with both transmission and distribution systems operators. Currently he is responsible for constructing high-voltage and high-pressure gas plants of Netze BW, a subsidiary of EnBW. He received his PhD at the Karlsruhe Institute of Technology (KIT).

Energy transition 2045 – How can an accelerated expansion of the 110 kV grid of Netze BW succeed?

The decarbonization of the energy supply until 2045 and the associated grid construction will be exemplified using the 110 kV grid of Netze BW. The speaker will discuss the challenges of a fast and secure grid conversion, as a “business as usual” approach is insufficient. Technical and procedural acceleration measures that will secure success will be presented.

Dipl. Ing. Fredi Belavić

Asset Manager, Austrian Power Grid AG, Austria

Dipl. Ing. Fredi Belavić is Asset Manager at Austrian Power Grid since 2018. His main responsibilities include asset management of high-voltage switchgear, specifically the development of maintenance, strategy and retrofits in power transformers and instrument transformers. He focuses on technology developments related to digitalization, monitoring and insulation technology in these areas. He is involved in developing and implementing the digital substation at APG. Before that, he worked 11 years as a Sales and Application Engineer in the protection and control technology area.

Digital substation using the example of the transformer

Transformers are the heart of the power system. They are expensive resources with long delivery times. Their failure poses problems in the energy supply and causes very high costs. The goal is to keep the transformers in operation as long as possible in an economical way. Thermal, electrical and mechanical stress factors can reduce the transformer’s life. The power transformers are “digitalized” and equipped with sensors to monitor the aging factors more carefully. With the help of the implemented software solutions, the operation of the transformers can be optimized, all faults can be detected and diagnosed early, and malfunctions and unplanned shutdowns can be avoided.

Prof. Dr.-Ing. Marc Klemm

University of Applied Sciences in Saar­brücken (HTW), Germany

Prof. Dr.-Ing. Marc Klemm is Professor in the field of High Voltage Engineering and Electrical Engineering at the Hochschule für Technik und Wirtschaft at the Universität des Saarlandes. He studied electrical engeineering with focus on high voltage engineering, circuit feedback, measurement and sensor engineering (especially climate sensor technology) and worked in various positions at Alstrom Power Generation AG Mannheim (ehemals ABB Kraftwerke) from 2001 to 2006.

Dieter Egli

Member of the Cantonal Government of Aargau

Dieter Egli has been a member of the Aargau government council since January 1, 2021. Previously, he was a member of the Grand Council from 2002 to 2020. He was a member of various commissions and chaired the Public Safety Commission, the Economic Affairs and Taxes Commission and the Aargau Museum Commission of the Government Council. From 2008 to 2020, he served as co-president of the SP Grand Council parliamentary group.
A sociologist by training, he worked as a communications manager, most recently at the Syna trade union.

Speakers Day 2

Dr.-Ing. Jürgen Bernauer 

CEO, PFIFFNER Group, Program Lead 

Dr. Jürgen Bernauer is an expert in electrical engineering and high-voltage technologies within the global power industry. With over 22 years of experience at ABB, he has held numerous positions in turnkey substations and has been serving as the CEO of PFIFFNER Group since 2019. Jürgen Bernauer boasts an impressive portfolio of over 20 technical papers on Electromagnetic Compatibility. He is an esteemed member of IEEE Power & Energy Society and the EMC Society. He actively supports business start-ups as a member of the Business Angels in Switzerland. As a graduate of the renowned Karlsruhe Institute of Technology in Germany, he holds a special place in the institute’s community.

Dr. Mladen Banovic

Director / Chief Editor, Transformers Magazine

Dr. Mladen Banovic is the Director and Editor-in-Chief of the Transformers Magazine. During the last 15 years, he has worked on global education and collaboration with a broad community through Transformers Magazine, Transformers Academy and Transformers Forum. Before that, he managed the development of products and systems for worldwide use in electric power grids up to 1200 kV (currently the highest level in the world), developing and deploying systems for smart grids and automated design, testing, diagnostic and monitoring systems. He received a PhD, MSc and BSc in electrical engineering at the University of Zagreb and is a senior member of IEEE, CIGRE, and the European Association of Scientific Editors (EASE).

Sustainability – outlook for the transformer industry

The sustainability of the energy sector is crucial to ensuring an attractive living environment for current and future generations. Billions are being invested in sustainability initiatives. Such investments should be prepared with an understanding of the relevant trends, including requirements and priorities – not only today but also in the future. Transformers Magazine conducted research on sustainability trends and, by using sound methodologies, analysing relevant data, and considering expert insights, has produced a set of information published in the Sustainability 2023 report. These findings provide valuable insights for anyone interested in this area. They will aid the decision-making of business leaders, sustainability managers, innovation managers and other senior staff responsible for strategic initiatives. This presentation will cover key sustainability trends in the transformer industry.

Ralf Riel


Ralf Riel studied mechanical engineering at the Technical University of Kaiserslautern. From 1995 to 2019 he was at ABB AG High Voltage Technology, Hanau where he engaged in the development of air-insulated circuit breakers and hydro-mechanical mechanisms, as Head of Quality Management and Head of the Drives Business Unit. From 2020 to 2022 Vishay BCcomponents GmbH, Heide as Head of Quality Management. Since September 2022 he is CEO of PFIFFNER Deutschland GmbH.

Martin Boss

Head of Technology, PFIFFNER Switzerland

Martin Boss has been with PFIFFNER since 1999. He currently oversees the technology division and effectively leads the engineering, design, industrialization, and development teams. In the past, he managed the business unit of oil-insulated AIS instrument transformers. Martin Boss holds a degree in energy and control engineering from the University of Applied Sciences in Burgdorf, Switzerland. Prior to working at PFIFFNER, he gained experience in different roles as an operations and commissioning engineer.

Francesco Pisu

Head of Circuit Breakers, PFIFFNER Switzerland

Francesco Pisu has been working around 15 years in the de­ve­lopment of high voltage circuit breakers (interrupters with different technologies and gases) at ABB and Hyundai Electric Switzerland. Since over a year he has been responsible for the general development and industrialization of an eco-friendly live tank circuit breaker at the Pfiffner Group.

Development of an Eco-Friendly Circuit Breaker

Pfiffner Group, a Switzerland-based T&D component specialist, announced in May 2022 the development of a new high-voltage air-insulated circuit breaker which uses F-gas-free insulation and extinguishing medium. The new circuit breaker development represents a significant step for the company, which, thus, completes its growing portfolio of high voltage solutions: the decision to develop a completely environmentally friendly circuit-breaker demonstrates the Pfiffner Group’s commitment to support its customers in reducing their carbon footprint.

Lorenz Grimm BSc

Development Engineer, ALPHA Elektrotechnik

Lorenz Grimm made an apprenticeship as polymechanic and studied mechanical engineering at BFH Burgdorf. He subsequently worked as Development Engineer Paver at AMMANN Schweiz AG and Calculation Engineer (structural mechanics) at Schmied Engineering GmbH. Since 2016 he is Development Engineer DISCONNECTORS at ALPHA Elektrotechnik AG.

Challenges During the Development  of a Center Break Disconnector

The presentation will focus on the experiences and challenges in the development and type tests of the new center break disconnector (incl. earthing switch, type CBDE). The most spectacular type tests and successes and failures will be reported.

Mattias Wimmer

Head of Disconnectors, ALPHA Elektrotechnik

Mattias Wimmer is Head of Business Unit Disconnectors, ALPHA Elektrotechnik and he is working for ALPHA since 2017. Previously he had worked for ten years in various functions within the Swatch Group, notably the domains of quality assurance, product management and service management.

First pilot project realized with the new disconnector type CBD 170 kV

What does it take to develop devices that do justice to people and systems? And what role does project management still play when the specifications actually dictate everything? A case study shows the problems.

Oleg Kuzmin

Product & Project Manager, PFIFFNER Switzerland

Oleg Kuzmin is an expert in high voltage technology and transformers with over 24 years of experience in research and industry, including over 12 years at ABB, Power Transformers Division. He joined PFIFFNER in 2023, where he is responsible for RC High Voltage Dividers as Product and Project Manager.

RC- High Voltage Dividers for HVDC applications

Ohmic capacitive voltage dividers are used in high-voltage switchgear. They divide the primary voltage into a standardized, equivalent secondary voltage and do this with high precision in a frequency range from DC to the high kHz. The “power quality” aspect is becoming increasingly important, and knowledge of the current network condition can help reduce premature aging of the installed system components. This contribution presents the advantages of RC dividers, and some application examples are discussed.

Dr.-Ing. Manfred Winkelnkemper

Head of R&D, PFIFFNER Switzerland

Manfred Winkelnkemper received his MSc and PhD in electrical engineering at the University of Technology Berlin /Germany in 1998 and 2005. From 2004 to 2016, he joined ABB Switzerland for research and development of medium voltage converter products. From 2016 to 2020, he was Head of R&D for active filter products at Schaffner Ltd. In 2020 he joined PFIFFNER Instrument Transformer Ltd. as head of the new sensor product development team. His expertise is in electronics, signal processing & control theory in energy transmission and drives applications. He has published 15 papers and worked on more than 15 patents.

Application examples for the new HV-DC current transformer for up to 20 kA

The DC current transformer is a new PFIFFNER Instrument Transformers Ltd product for low, medium and high-voltage applications. It combines 95 years of experience in insulation technology and innovative digital signal processing. The device’s measurement and digitization occur regardless of the specific application and customer interface. A large number of configurable interfaces allows maximum flexibility in integration into the secondary technology. The presentation gives an overview of these possibilities in industrial and academic applications.

Marc Brunner

Product Engineer, HAEFELY

Marc Brunner completed an apprenticeship as an electronics technician and subsequently studied electrical engineering (embedded systems) at FHNW until 2007. Afterwards, he worked at Thomson Laboratories Ltd (patent infringement) until 2009 and at Accenture AG (programmer) until 2010. Since 2010 he works as a product engineer (PM / HW / SW) at HAEFELY.

High-precision transformer measurement with the new digital measuring bridges CITAS & VITAS

For the start there will be an overview of the IEC standards for CT and VT instrument transformers with the resulting requirements for a transformer measuring bridge. What follows is an introduction to HAEFELY’s modular sensor platform (HW & SW) and a presentation of the new high-precision digital measuring bridges CITAS & VITAS with insight into the product development and the “Design by Virtual Model” approach. There will be a presentation of the requirements, evaluation, and adjustments of the HW regarding high precision and stability and a demonstration of the SW at an expert level.Finally the importance of a remote interface in the industrial environment to enable efficient integration into existing SW infrastructures and process flows will be explained.

Stefan Häni


Stefan Häni joined HAVECO AG in 2019 and became Managing Director in 2020. He has many years of experience in management positions at energy suppliers (EVU), service companies as well as in the management of Elektras in the field of electrical energy distribution networks and plant engineering. From February 2021, HAVECO AG will have, in addition to the site in Gwatt b. Thun, HAVECO AG will have a further location in Zofingen. Stefan Häni’s goal is to further expand customer proximity in the northern region so that HAVECO’s experienced network and plant specialists can offer faster and more favorable availability.

Presentation of HAVECO based on the Project “Renewal of 170 kV AIS Switchgear”

In order for HAVECO to be able to accurately estimate the installation costs and execute the offer, it had to rely on the help of the responsible project managers from ALPHA Elektrotechnik, Pfiffner Messwandler and Pfiffner Systems. At the beginning of this project, the technicians had no experience in installing such components and  had to get used to the new situation. The decisive factor was that  the team could always  rely on the support of the more experienced project managers from  the respective sister companies during the entire conversion work. This enabled the team to complete the first two stages on time, on budget and in the required quality. This project has shown impressively what knowledge is bundled in the Pfiffner Group and how crucial constant exchange and communication are in the project implementation.

Dipl. Ing. Walter Stetter


Dipl. Ing. Walter Stetter studied electrical engineering at the TU Darmstadt. As CEO, he manages PFIFFNER Systems AG, which he built up from its new foundation within the Pfiffner Group. He is responsible for the acquisition and handling of projects across PFIFFNER companies in the systems business for electrical plants in the industrial and energy sectors. Walter Stetter counts on over 30 years of experience in various management positions, including at GE Grid Solutions, Alstom T&D, AREVA T&D and as a design and commissioning engineer at ABB.

Felix Behringer

Head of Sales Switzerland, PFIFFNER Switzerland

Felix Behringer is an expert in high and medium-voltage technology with over 20 years of experience at ABB and Hitachi Energy. He has been with PFIFFNER for almost 4 years, where he is responsible for sales in the MV and GIS areas.

Sustainable Swiss project – Retrofit of an ewz switchgear for Zurich

The Pfiffner Group is setting the course for the future, both strategically and in terms of solutions, to contribute to a sustainable energy supply with innovative solutions. Sustainability in the operation of electrical systems for Zurich is essential to ewz Netze. Therefore, together with the Pfiffner Group, ewz is planning a retrofit of an MV switchgear in an ewz substation. Various components in the switchgear panel will be replaced and implemented in the existing infrastructure. This retrofit will ensure the substation’s smooth and more efficient operation in the long term. Pfiffner and ewz are now starting with a pilot field to verify the technical feasibility in practice.

Torsten Berth

Business Development Manager, HAEFELY

Torsten Berth received a classical skilled worker training for operating/measuring/control/regulation technology and Electrical engineering/Information processing and additionally Business Administration and Engineering. He has been working as Development Engineer, Project Manager, Head of R&D, CTO in companies in Germany, Austria, Switzerland.

Sustainable Project Electric Bus “Citywide”

In times of rising energy costs and global warming, sustainable projects become ever more important. The presentation is about a public transport mobility project which combines renewable energy generation and mobility. The “Citywide” electric bus is charged by a photovoltaic system with battery storage, controlled by a central energy management system (EMS). The EMS considers the grid load, weather data, and the current timetable. Local solar energy is available to local consumers, the grid is stabilized, and network costs are reduced.

Dr. Petr Mráz

Product Manager, HAEFELY

Petr Mráz received his PhD in Diagnosis of Electrical Devices from the University of West Bohemia in Pilsen, Czech Republic in 2014. He works at HAEFELY AG as Product Manager and is primarily responsible for the Partial Discharge product line. In addition, he is a member of several CIGRE working groups and in an IEC 60270 maintenance team.

PD detector DDX 9160/61 as a Tool for Partial Discharge Measurement

Over the past decades, partial discharge (PD) measurement has become one of the most popular diagnostic and quality assurance techniques for high voltage (HV) apparatus such as power, distribution, and instrument transformers, rotating machines, switchgear, surge arresters, bushings, cables, power capacitors, etc. In contrast to other diagnosic tools, PD offers a broader view of the test object condition and provides a hint of interpretation of the fault type. The new PD detector DDX 9160/61 perfectly provides all the necessary tools to perform comparable, repeatable and plausible measurements.

Michael Gamlin

Manager System Engineering & Projects, HAEFELY

Michael Gamlin is head of HV Engineering & Projects at Haefely AG in Basel. He studied electrical engineering at the Technical University of Karlsruhe (now KIT) from 1984 to 1989, specialising in high-voltage engineering. From 1990 to 1994 he worked at Messwandlerbau AG in Bamberg (today Siemens Bamberg) as an electrical design engineer for HV test transformers. Since July 1994 he has been working for Haefely AG. Michael Gamlin has been working internationally for more than 20 years as a consultant for the design of high voltage test laboratories (shielding, earthing, acoustics). Furthermore, he is a member of Cigre, IEC and national TC working groups for high-voltage test and measurement technology as well as transformers and high-voltage cables.

Preliminary experience with a mobile test system for 525 kV DC Cables

The presentation “Preliminary experience with a mobile test system for 525 kV DC cables” will introduce the DC test system and its components, specifically as DC source, protection resistor divider, discharge resistor and container storage. The design parameter for the components and specific requirements, such as wind load or optimized test voltage time, will be discussed. Finally, some examples of DC cable systems with their technical data will be given.

Dr. Lorenz Bort

Design Engineer, HAEFELY

Dr. Lorenz Bort is a design engineer at Haefely, responsible for power transformer test systems and the mobile AC cable test system. Before joining Haefely, he studied physics at ETH Zurich and did his PhD in the ETH high voltage group, researching switching arcs in HVDC grids.

AC on-site cable tests with the mobile system up to 520kV test voltage (RSKF)

The “RSKF” is Haefely’s mobile test system for AC Cables, with up to 260 kV / 520 kV test voltage. In 2020 / 2021, version 2.0 was developed based on a reactor with fixed inductance, fed by a static frequency converter, already in use in our transformer test systems. The main technical improvements are the filtered sinewave output that allows PD-Measurement without “gating” of switching noise and a fully automated frequency and voltage control into the resonant point. In December 2022, the first cable was successfully tested in Italy.

Laurent Vlesik

Head of Sales Bushings, MOSER GLASER

Laurent Vlesik heads the sales of MGC’s bushings product range. He has more than 20 years of experience in the electrical industry. The last 14 years he specialized in the field of high voltage bushings. Thanks to the commitment of his team and of him, the bushings family is today an essential activity for MGC.

Expansion of the transformer bushing family including the 420 kV and 550 kV range

Thanks to the ongoing investments made in the MGC factory, the bushing family can now effectively meet the key demands of the customers. MGC offers a wide range of bushings with both standard and customized dimensions, ensuring interchangeable solutions. With the 420 kV and 550 kV the circle of manufacturing performance is closed.

Roger Hausy

Sales Engineer Busbars, MOSER GLASER

Roger Hausy has been with Moser Glaser for 20 years. Initially, he has lead the development of the transformer bushings product line. Since 2006 he has been successfully involved in the sales of DURESCA busbar systems as Area Sales Manager for various world regions.

DURESCA busbars for hydroelectric power plants and offshore wind farms

The presentation is about the application of DURESCA busbars for hydroelectric power plants and offshore wind farms. In case of hydroelectric power plants the installation within new construction as well as within the renovation and expansion of existing power plants will be considered. Advantages therein lie in low space requirement, high current-carrying capacity, and short-circuit withstand ability with minimal maintenance requirements. In case of the offshore wind farms a look at the history of usage since 2007 will be taken, as well as on future usage that lies ahead.