The future of GIS Insulation: moving beyond SF6 | Marcel Heckel, PFISTERER

Item: The future of GIS Insulation: moving beyond SF6 | Marcel Heckel, PFISTERER
Rating: 3
Author: PostSingularity Institute

by Marcel Heckel (PFISTERER), interviewed by Chris Gerber · View the channel on PSI

Applied Sciences & Engineering Energy THEnergy technology and engineering THRElectrical engineering

🎙 Marcel Heckel (PFISTERER), interviewed by Chris Gerber 👥 594 📅 September 25, 2026 ⏱ 12 min 👁 32 📄 expert opinion 🧭 2026-10-04

Available in: English (current) Français

Keywords

SF6Gas-insulated switchgearsynthetic aircable terminationCIGRE

Summary

At CIGRE 2026 in Paris, Marcel Heckel, Head of R&D at PFISTERER, discusses the impending phase-out of sulfur hexafluoride (SF6) in gas-insulated switchgear (GIS). SF6, with a global warming potential over 20,000 times that of CO2, is being regulated in the EU under the F-gas regulation. PFISTERER, which manufactures cable terminations for GIS, must adapt its products to alternative gases such as synthetic air (O2/N2) and C4-FN mixtures. The main challenges include reduced dielectric strength, requiring higher pressure or design changes; increased leakage risks due to smaller gas molecules like CO2 permeating epoxy; and material compatibility issues. Qualification is testing-driven, involving AC stress, partial discharge, lightning and switching impulses, and permeation tests. CIGRE Working Group B1.88 and revision of IEC standards for GIS cable terminations guide this process. The outlook is positive, with growing demand from renewables, offshore and subsea projects. The interview provides an industry perspective but lacks detailed technical data.

152 words

Critical Evaluation

Value of the Information & Strength of the Argument

The video offers valuable insights into the practical engineering and regulatory challenges posed by SF6 replacement in high-voltage switchgear. The argumentation is coherent: it identifies three key technical issues—dielectric performance, leakage, and material compatibility—and explains the need for re-testing and standards revision. However, it remains at a high-level, without quantitative examples or experimental data. The expertise of the speaker is evident, but the lack of specific references or case studies limits the depth of the argumentation.

Scientific Rigor, Source Quality, Title Accuracy

The video does not cite specific scientific publications or data, relying instead on the speaker’s expertise and general knowledge of industry standards. The description provides links to the company and LinkedIn pages, but no direct references to the regulatory documents or standards discussed (e.g., EU F-gas regulation, IEC norms). The title is accurate and aligns with the content. Without external verification, the rigor of the presented information is moderate.

160 words

Title / Content Match

The title accurately reflects the content: the discussion centers on the future of GIS insulation and alternatives to SF6.

Quality & Reliability

6/10

The video is an expert interview with a company R&D head discussing technical challenges of replacing SF6 in GIS systems. Claims align with known facts (SF6 GWP, EU regulation), but no independent sources or data are provided, limiting verifiability.

Chapters

Cited Sources

Power Systems Technology — Company website linked in description; provides context on the platform hosting the interview.
Newsletter subscription — Link to subscribe for exclusive content, mentioned in description.
Power Systems Technology LinkedIn — LinkedIn page for the channel, mentioned for updates.
Transformer Technology LinkedIn — Sister LinkedIn page, mentioned for related content.
Women in Power Systems LinkedIn — LinkedIn page mentioned for community engagement.

Concurring Sources

Sulfur hexafluoride - Wikipedia — Confirms the high GWP of SF6 and its use in electrical equipment.
EU F-gas regulation — Outlines the EU regulatory framework phasing down F-gases, relevant to SF6 ban in new GIS.

Contribution & Novelties

The video contributes by highlighting the often-overlooked impact of alternative insulation gases on auxiliary components like cable terminations, an area not widely discussed in public forums. It bridges the gap between GIS manufacturers and component suppliers, emphasizing the need for systemic qualification.

Pour aller plus loin :

Sulfur hexafluoride — Provides background on SF6 properties and environmental impact.
EU F-gas regulation — Official EU page on the regulation phasing down F-gases, including SF6.
CIGRE — International council on large electric systems, where working groups like B1.88 develop technical recommendations.

89 words

Radar Profile

The scores indicate a balanced profile with moderate information quantity and reliability but higher technical level. This is characteristic of a focused industry interview that assumes some prior knowledge, with limited breadth but reasonable depth.

Reliability 6/10