Company lists · Data refreshed September 2026

Top 25 High voltage transformer manufacturers based in France

Name: High voltage transformer manufacturers based in France
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 70 companies tracked

RevenueBase identified 70 high voltage transformer manufacturers headquartered in France as of September 2026 and tracks 3,495 professional contacts across them, including 602 with verified work emails. Lyon is the largest hub.

This list covers high voltage transformer manufacturers headquartered in France, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 30, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 30, 2026 86% judged on-target in blind review

70Companies

3,495Contacts tracked

602Verified emails

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The 25 largest high voltage transformer manufacturers based in France

Ranked by team size

Top 25 of 70 high voltage transformer manufacturers based in France, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to high voltage transformer manufacturers: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Areva T&d	Indirect evidence	92084 Paris - La Défense, FranceHQ checked Sep 30, 2026	10001+	2,012 contacts →
	Indirect evidence “One of the top three global players in the transmission and distribution of energy, AREVA T&D offers solutions to bring electricity from the source onto the power network.” Source: RevenueBase Database · checked Sep 30, 2026
2	SCLE	Strong evidence	Toulouse, FranceHQ checked Sep 30, 2026	201-500	212 contacts →
	Strong evidence “Devices and systems for high-voltage substations and rail signaling” Source: RevenueBase Database · checked Sep 30, 2026
3	Aventech	Indirect evidence	Valence, FranceHQ checked Sep 30, 2026	201-500	204 contacts →
	Indirect evidence “Expert en conception, industrialisation, production d'équipements électriques critiques HT/BT en environnements sévères : ↳ Oïl & Gaz, Centrale nucléaire & process, Centrale…” Source: RevenueBase Database · checked Sep 30, 2026
4	Green Transfo SAS	Indirect evidence	Cahors, FranceHQ checked Sep 30, 2026	1,001-5,000	164 contacts →
	Indirect evidence “At Green Transfo SAS, we are dedicated to providing our customers with the highest level of satisfaction through our commitment to quality products and exceptional service.” Source: RevenueBase Database · checked Sep 30, 2026
5	Spie Thépault	Indirect evidence	Cergy, FranceHQ checked Sep 30, 2026	201-500	98 contacts →
	Indirect evidence “SPIE Thépault est le spécialiste historique des réseaux électriques haute tension.” Source: RevenueBase Database · checked Sep 30, 2026
6	Transformateurs Solutions Vénissieux	Partial evidence	Vénissieux, FranceHQ checked Sep 30, 2026	51-200	74 contacts →
	Partial evidence “Transformateurs Solutions Vénissieux is the French specialised company of electric power transformers reparation.” Source: RevenueBase Database · checked Sep 30, 2026
7	Sadtem	Indirect evidence	Douai, FranceHQ checked Sep 30, 2026	51-200	33 contacts →
	Indirect evidence “SADTEM est un acteur industriel GLOBAL reconnu de l’APPAREILLAGE ELECTRIQUE DE PUISSANCE en Moyenne et Haute Tension dans les domaines de la traction électrique, de la production…” Source: RevenueBase Database · checked Sep 30, 2026
8	Bernard Bonnefond	Strong evidence	St Etienne, FranceHQ checked Sep 30, 2026	11-50	25 contacts →
	Strong evidence “VARIVOLT is an on-load stepless variable voltage transformer (0–20 MVA), used in the glass, steel, chemical industries, and test platforms.” Source: RevenueBase Database · checked Sep 30, 2026
9	MYRRA	Strong evidence	Bussy-saint-georges, FranceHQ checked Sep 30, 2026	201-500	24 contacts →
	Strong evidence “Myrra design and manufacture high-quality transformers and inductors for industrial use.” Source: RevenueBase Database · checked Sep 30, 2026
10	SNT Duriez	Partial evidence	Le Grand-quevilly, FranceHQ checked Sep 30, 2026	11-50	24 contacts →
	Partial evidence “SNT DURIEZ votre constructeur et réparateur de transformateurs électrique” Source: RevenueBase Database · checked Sep 30, 2026
11	Securelec Socem	Partial evidence	Courrières, FranceHQ checked Sep 30, 2026	11-50	22 contacts →
	Partial evidence “Depuis 1954, Securelec Socem conçoit et fabrique des transformateurs et équipements électriques, du standard au sur-mesure.” Source: RevenueBase Database · checked Sep 30, 2026
12	Technix	Strong evidence	Créteil, FranceHQ checked Sep 30, 2026	11-50	18 contacts →
	Strong evidence “TECHNIX High Voltage is one of the European leader manufacturer of regulated High Voltage DC power supplies, High Voltage capacitor chargers and High Voltage Electron Beam power…” Source: RevenueBase Database · checked Sep 30, 2026
13	Kiloamps	Strong evidence	Le-chambon-feugerolles, FranceHQ checked Sep 30, 2026	11-50	18 contacts →
	Strong evidence “KiloAmps is a medium-sized international company founded in KiloAmps specializes in the study, design and supply of high-current, low- and high-voltage power transmission.” Source: RevenueBase Database · checked Sep 30, 2026
14	AEC Energy Services	Indirect evidence	Alès, FranceHQ checked Sep 30, 2026	11-50	17 contacts →
	Indirect evidence “Industrial Electrical Solutions HV / LV Expert We provide technical and logistical solutions to meet our customers' strategic challenges and conditions of use, wherever they are…” Source: RevenueBase Database · checked Sep 30, 2026
15	Sotrelec	Indirect evidence	Plescop, FranceHQ checked Sep 30, 2026	11-50	17 contacts →
	Indirect evidence “Sotrelec est une entreprise reconnue dans le milieu des postes haute tension, de l’électricité industrielle, des parcs éoliens et du photovoltaïque- Intégration de composants HT…” Source: RevenueBase Database · checked Sep 30, 2026
16	LE Cosinus Transformateurs Électriques ET Bobinages	Partial evidence	77330, FranceHQ checked Sep 30, 2026	11-50	17 contacts →
	Partial evidence “Située en Ile de France, proche de Marne La Vallée, la société Le Cosinus se veut LE spécialiste de la conception et de la fabrication de transformateurs (Mono ou Triphasé) et…” Source: RevenueBase Database · checked Sep 30, 2026
17	RS Isolsec France	Partial evidence	Cepoy, FranceHQ checked Sep 30, 2026	51-200	14 contacts →
	Partial evidence “Spécialiste des transformateurs de mesure depuis 1954, RS ISOLSEC offre une large gamme de transformateurs de courant, transformateurs de tension, transformateurs de protection…” Source: RevenueBase Database · checked Sep 30, 2026
18	AGCEI	Partial evidence	Claix, FranceHQ checked Sep 30, 2026	11-50	13 contacts →
	Partial evidence “Nous vous proposons une offre complémentaire en transformateurs et inductances basse et moyenne tension.” Source: RevenueBase Database · checked Sep 30, 2026
19	Soudax Equipements	Strong evidence	Epone, FranceHQ checked Sep 30, 2026	11-50	13 contacts →
	Strong evidence “Building on French know-how in the end-to-end manufacture of transformers, Soudax has been carving out a place in the precision industry since 1973 to meet the requirements of…” Source: RevenueBase Database · checked Sep 30, 2026
20	Gounot	Indirect evidence	Boissy St Leger Cedex, FranceHQ checked Sep 30, 2026	11-50	13 contacts →
	Indirect evidence “Electricité industrielle courant fort HT / BT - Installation provisoire de chantier et événementiel - Activité tableautier - Conception et installation de postes HT/BT et…” Source: RevenueBase Database · checked Sep 30, 2026
21	SHB Electric	Indirect evidence	Brignancourt, FranceHQ checked Sep 30, 2026	11-50	12 contacts →
	Indirect evidence “Shb Electric est une société spécialisée dans la maintenance de niveaux 1 à 5, l'installation et la réparation d’équipements électriques.” Source: RevenueBase Database · checked Sep 30, 2026
22	CIRCÉ	Indirect evidence	Parigné-l’évêque, FranceHQ checked Sep 30, 2026	11-50	11 contacts →
	Indirect evidence “Recognised specialist in the design and manufacturing of winding products and customised systems, Circé offers you a wide range of single-phase, three-phase, three-to-single-phase…” Source: RevenueBase Database · checked Sep 30, 2026
23	Commet Group	Indirect evidence	Ennery, FranceHQ checked Sep 30, 2026	11-50	11 contacts →
	Indirect evidence “COMMET GROUP vous apporte des solutions globales dans le domaine de la haute tension.” Source: RevenueBase Database · checked Sep 30, 2026
24	SEL Groupe SAS	Indirect evidence	Merville, FranceHQ checked Sep 30, 2026	11-50	10 contacts →
	Indirect evidence “Implanté dans le nord de la France, depuis sa création en SEL Groupe est un acteur incontournable dans les secteurs de l’électricité.” Source: RevenueBase Database · checked Sep 30, 2026
25	Groupe Sanergrid	Strong evidence	Lyon, FranceHQ checked Sep 30, 2026	11-50	9 contacts →
	Strong evidence “THE SANERGRID® GROUP IS SPECIALIZED IN ELECTRICAL ENERGY FIELDS, PARTICULARLY HIGH-VOLTAGE TRANSFORMERS.” Source: RevenueBase Database · checked Sep 30, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: high voltage transformer manufacturers. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names high voltage transformer manufacturers.
Partial evidence: Its own public description names part of high voltage transformer manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name high voltage transformer manufacturers. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 70 high voltage transformer manufacturers based in France

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High voltage transformer manufacturers based in France at a glance

As of Sep 30, 2026

17.2%Verified-email coverage

49.9Average contacts per company

11-50Median size (employees)

5.7%Largest-city concentration · Lyon

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

10001+

Email recency for this list is measured worldwide rather than for France, so it is reported there. Company counts and contact totals on this page are exact for France, over 70 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among high voltage transformer manufacturers, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in France whose own description of what they do matches “high voltage transformer manufacturers”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names high voltage transformer manufacturers), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among high voltage transformer manufacturers, and records with no verified work email. Companies headquartered outside France are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 602 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 30, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names high voltage transformer manufacturers, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many high voltage transformer manufacturers are there based in France?

RevenueBase identified 70 high voltage transformer manufacturers headquartered in France as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Areva T&d, headquartered in La Defense, tops this list with the largest team on record.

Which city has the most high voltage transformer manufacturers?

Lyon leads with 4 headquartered companies, followed by Paris (3) and Rivesaltes (2).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 602 verified decision-maker contacts tracked across these 70 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 30, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.