Line Surge Arresters, Lightning Arrester, Surge Protective Devices, Power system Insulation Coordination, Consulting

Effective Consulting Beyond Standards

Lightning Performance Solutions, Surge Arrester Technology, & Insulation Coordination

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Lightning Risk in the Digital Era, From Advanced Lightning Data to Automated IEC Compliance

Florent Giraudet (Metarresters) | Kelly Buza + Jim Grasty ( Skytree Scientific ) March 2026 Introduction: Why Lightning Data Quality Matters Today Lightning is one of the most frequent and disruptive natural hazards affecting power systems and critical infrastructure worldwide. Globally, an estimated 1.4 billion lightning flashes occur every year, the majority over land, where transmission lines, substations, renewable assets, and industrial facilities are exposed. For uti

Apr 1714 min read

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Independent Consultancy | Specialized in Lightning Performance, Surge Arrester Technology, and Insulation Coordination for the Energy Supply Industry

Who We Are

Trusted by RTE (France), Powerlink (Australia), ENGIE Laborelec (Global), and PLN (Indonesia) — along with several power utilities, engineering firms and manufacturers across four continents. Since 2022, we have delivered independent expertise on surge arresters, insulation coordination, and lightning performance for the power industry.

We are vertical specialists: narrow scope, deep expertise. Surge arrester technology, insulation coordination studies, and lightning performance optimization on overhead lines — the full overvoltage-protection chain, under one roof.

Within lightning specifically, we are the only consultancy that owns the entire lightning-performance problem end-to-end — from raw lightning data, to simulation and system studies, to the application of optimized mitigation methods such as Line Surge Arresters, backed by our specialized tools Sigma SLP and I3CM LLS.

We combine technical precision with practical experience from international projects across diverse power systems and standards.

What We Offer

Expert guidance on surge arrester selection, specification, and IEC/IEEE compliance
Structured lightning performance improvement projects — from due diligence to implementation
Insulation coordination studies tailored to your project (EMTP, PSCAD)
Dedicated software solutions: SIGMA SLP (lightning studies) and I3CM LLS (lightning data)
Proactive QA/QC on surge arrester projects (testing and manufacturing expertise)
CAPEX optimization through rigorous stress-strength analysis — right-sized specifications and application strategies, neither over- nor under-engineered
Training and seminars on technology, standards, and best practices

Why Choose Us?

Independent — free from manufacturer alignment and the bias of large engineering firms; our recommendations serve your project, not a product line or a billable-hours target.
Vertically specialized — deeper than generalist engineering firms in our scope, more agile than large consultancies built for full-system projects.
Client-centric — engineering decisions guided by your project's requirements and outcomes.
Dedicated tooling where it matters — Sigma SLP and I3CM LLS combined with proven expertise deliver unmatched capabilities in lightning performance on overhead lines.
Flexible engagement — long-term cooperation or project-based work.

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Testimonials from the Energy Supply Industry

"I have been involved in the surge arrester and surge protection industry for over 40 years. During that time, I have worked in all aspects of arresters as a consultant on the protection of power system. Also, during this time, I have been an active member of both IEEE and IEC standards. These activities have presented me the opportunity to work and associate with Florent on numerous occasions. Over the years I have encounter and worked with most of the world experts in this field. I can say with certainty that Florent has become one of them. Should you need a hardworking, enthusiastic, and trustworthy person to assist you in surge protection, you should not hesitate to call on Florent."