What Vrielmann does

Vrielmann GmbH is a family-owned German Mittelstand electrical engineering company founded in 1976 and headquartered in Nordhorn-Klausheide, Lower Saxony. It designs, manufactures, installs, commissions, and maintains medium- and low-voltage electrical infrastructure — principally custom transformer stations (Trafostationen) and switchgear systems (Schaltanlagen) — for industrial customers, trade/craft businesses, renewable energy operators (photovoltaic and biogas), and EV charging infrastructure operators. Its technical offering is built on licensed platforms from Siemens (SIVACON S8, up to 7,000 A) and SEDOTEC (VAMOCON, up to 5,000 A), combined with proprietary products such as the SINUREG single-phase speed controller, Aquafuchs heating control, and Lockswitch repair switch, all manufactured in-house at its ~4,500 m² facility.

The business generates revenue through project-based one-time sales of transformer stations and switchgear, recurring manufacturer-independent maintenance and inspection contracts with 24/7/365 emergency service, professional services for network planning and electrical/legal safety consulting, and an in-house training academy (Vrielmann Akademie) that trains 600+ electrical professionals annually. Distribution is exclusively direct via an enterprise field sales motion led by a dedicated Vertrieb department, with project managers assigned from consultation through commissioning. The customer base spans distribution network operators, industry, renewable energy, trade, and e-mobility segments — with no publicly disclosed customer logos.

Strategically, Vrielmann is investing in a 2026 EU/State-funded expansion building at its Nordhorn site, completed a 2025 corporate rebrand in conjunction with its 50-year anniversary, and has expanded its product lines around EV charging and decentralized renewable energy integration. The company operates within a dense German/European regulatory framework (VDE-AR-N 4110, IEC 61439, DGUV, BetrSichV) and holds ISO 9001 and ISO 45001 certifications through 2026, with regulatory expertise and a publicly sworn electrical engineering expert serving as a key competitive barrier.

Name

Vrielmann

Legal name

Vrielmann GmbH

Website

https://vrielmann.com

Company type

Private

Founded year

1976

Operating status

Operating

Headcount range

51–100 employees

Short description

Vrielmann GmbH is a family-owned German Mittelstand electrical engineering firm that designs, manufactures, installs, and maintains medium-voltage transformer stations and switchgear systems for industrial, renewable energy, EV charging, and distribution network operator customers in Lower Saxony.

Ownership category

akta.pro rank

Product category

Electrical Engineering Services and Power Distribution Infrastructure

NAICS

Power, Distribution, and Specialty Transformer Manufacturing (335311), Switchgear and Switchboard Apparatus Manufacturing (335313)

SIC

Power, Distribution & Specialty Transformers (3612), Switchgear & Switchboard Apparatus (3613)

akta.pro primary industry

Transformers (Power, Distribution, Instrument, Specialty) (IMAGAAAA)

akta.pro secondary industries

Switchgear & Switchboards (HV/MV/LV, GIS/AIS) (IMAGAAAB), Transformer & Reactor Refurbishment / Replacement Programs (EUAEALAE), High-Voltage Electrical Systems (Switchgear, Transformers, Protection & Control) (EUAEAFAA)

Keywords

• Transformer station manufacturing
• Medium voltage switchgear
• Electrical engineering services
• Power distribution infrastructure
• Network planning and protection

Headquarters

HQ city

Nordhorn

HQ country

Germany

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Technology or R&D, Marketing or Sales, Supply Chain

Revenue model

1. Transformer Stations (Trafostationen): Design, manufacturing, delivery, installation, and commissioning of custom transformer stations for industry, crafts, photovoltaics, biogas, and charging infrastructure. Includes rental of transformer stations for short-term and long-term use (events, construction sites, emergency/havari).
2. Switchgear Systems (Schaltanlagen): Design and manufacturing of low-voltage and medium-voltage switchgear, energy switching device combinations (VAMOCON, SIVACON S8), installation distributors, cable distribution cabinets, meter distributors, and control systems. Delivered as project-based orders.
3. Maintenance and Service Contracts: Recurring maintenance contracts for medium-voltage switchgear, transformers, low-voltage switchgear, reactive power compensation systems, protection and control technology, and thermographic inspections. Includes 24-hour emergency hotline service 365 days/year.
4. Academy and Training Services: Annual training sessions (VEFK, EFK, EUP, switching authorization), seminars, and workshops for electricians. Also legal safety consulting services. More than 600 professionals trained annually.
5. Power Electronics Products: Sale of proprietary and manufactured electronic devices including SINUREG speed controllers, Aquafuchs heating controls, capacitive sensor switches, and Lockswitch repair switches. Both single-unit and series production of PCBs and complete devices.
6. Network Planning and Optimization: Network analysis, network calculations (load flow, short-circuit, selectivity, cable sizing, arc flash, motor startup), energy efficiency analysis, reactive power compensation systems, network filters, and busbar systems. Project-based consulting and engineering.

Pricing tiers

Go-to-market motion2 records

Distribution channels2 records

Marketing channels6 records

Core offering

Vrielmann designs, manufactures, installs, and maintains custom transformer stations (Trafostationen) and switchgear systems (Schaltanlagen) for industrial, trade, photovoltaic, biogas, and charging infrastructure applications. The company delivers a full-service package from consulting and network planning through manufacturing, installation, commissioning, and ongoing maintenance, complemented by an in-house electronics division producing proprietary devices and a professional training academy.

Product overview

Vrielmann is a medium-voltage electrical engineering company offering a comprehensive portfolio of products and services centered on electrical energy infrastructure. The core products are transformer stations (Trafostationen) and switchgear systems (Schaltanlagen), which Vrielmann designs, manufactures, installs, and maintains. These are complemented by maintenance and service contracts, network planning and optimization, protection and control technology, and an in-house electronics development and manufacturing division producing the SINUREG speed controller product line and Aquafuchs heating control systems. The Vrielmann Akademie provides professional training and continuing education, and a dedicated consulting service addresses electrical and legal safety compliance. Services are delivered as a single-source package from consulting and planning through manufacturing, installation, and ongoing maintenance.

Differentiator

Problem solved

Functional benefit

Brands

• Vrielmann Akademie: The company's own educational institution offering training programs, seminars, and workshops for electricians and electro-technical personnel, founded in October 2011.

Products and services

• Trafostationen (Transformer Stations) Prefabricated and custom-built transformer stations for converting medium voltage to low voltage, serving industry, trade, photovoltaic, biogas, and charging infrastructure applications. Offered in compact, walkable, and building-integrated configurations, with rental options available for short-term and long-term use (events, construction sites, emergency/havari situations).
• Schaltanlagen (Switchgear Systems) Energy switchgear combinations and power distribution systems designed and manufactured to high quality standards for reliable and safe energy supply in industry and trade. Includes VAMOCON systems up to 5,000 A and SIVACON S8 systems up to 7,000 A, as well as installation distributors, cable distribution cabinets, meter cabinets, and control systems.
• Wartung und Service (Maintenance and Service) Manufacturer-independent maintenance, inspection, and hazard assessment services for electrical energy systems, including medium-voltage switchgear, transformers, low-voltage switchgear, reactive power compensation systems, protection and control technology, and thermography. Available via maintenance contracts with a 24-hour emergency service.
• Netzplanung und Optimierung (Network Planning and Optimization) Services ranging from cable sizing and power data determination to comprehensive network calculations for new construction, expansion, and modification of medium- and low-voltage supply. Includes network analysis, load flow calculation, short-circuit current calculation, network protection/selectivity analysis, cable dimensioning, arc fault calculation, motor startup simulation, energy efficiency analysis, reactive power compensation systems, network filters, and busbar systems.
• Schutz- und Leittechnik (Protection and Control Technology) Remote control and station automation solutions enabling grid operator access to transformer stations. Covers protection technology for generation plants, industry, and supply networks (overcurrent time protection, distance protection, differential protection, NA protection per VDE-AR-N 4110), as well as EZA/park controllers for integrating generation plants into the German medium- or high-voltage grid, using IEC 61850, IEC 60870, and Modbus protocols.
• SINUREG Drehzahlregler (SINUREG Speed Controller) Proprietary single-phase motor speed controller that uses linear current draw from the grid to minimize electromagnetic interference. Switches network voltage directly at approximately 20 kHz without prior rectification, acting as an adjustable resistance with minimal heat generation. Suitable for applications up to IP65 and motor currents up to 4.5 A.
• Aquafuchs Heating Controller Temperature- and water level-dependent heating controller for safety catching basins of refrigeration and air conditioning systems. Regulates heating mats or heating cables based on ambient temperature and water level, with optional use as a pump controller.
• Elektronik-Entwicklung und -Fertigung (Electronics Development and Manufacturing) Custom electronics development including circuit boards, electronic modules, and complete devices. Services include schematic and layout development, microcontroller programming, housing design, 3D drawings, prototype construction, EMC testing, and series production with 100% inspection. Includes speed regulators for AC and three-phase motors, capacitive sensor switches, and the Lockswitch padlockable repair switch.
• Vrielmann Akademie (Vrielmann Academy) Professional training and continuing education provider for electricians and electrical professionals. Offers annual instruction sessions (VEFK, EFK, EUP, switching authorization up to 36 kV, EFKffT), seminars on explosion protection, hazard assessments, EV charging stations, selective network protection, and electrical testing, as well as workshops on energy efficiency and cable sizing. Trains over 600 professionals annually.
• Beratung zur Elektro- und Rechtssicherheit (Electrical and Legal Safety Consulting) Advisory services for establishing legally compliant organization of electrical operations, including expert opinions on organization, personnel appointment, hazard assessment, third-party company regulations, work and operating instructions, arc flash energy evaluation, PPE selection, testing organization, and task assignment for electrical personnel up to and including responsible electrical specialist (VEFK).

Quantifiable outcome

• Amortization of reactive power compensation plants typically within two to three years
• +2 more outcomes

Named customers5 records

Segments6 records

Ideal customer profiles6 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration3 records

Feature7 records

Partnerships

Five partnerships are on record, tiered core.

• WAGOcoreStrategic or Co-development PartnerVrielmann and WAGO collaborate on digitalizing electrician training. WAGO's automation training systems are used in Vrielmann Academy's practical training rooms. A joint tour of Vrielmann Academy's automated training facility gave WAGO colleagues insight into how WAGO terminals are integrated into training systems. This partnership exemplifies how digitalization is transforming electrical training.
• SEDOTECcoreTechnology or IntegrationLong-standing SEDOTEC system partner for VAMOCON energy switching device combinations. VAMOCON 1250 systems handle medium energy demands (up to 800 kVA transformers); VAMOCON 5000 systems handle high energy demands (up to 3,150 kVA transformers). Vrielmann handles technical implementation and on-site assembly.
• Siemens (SIVACON Technology Partner)coreTechnology or IntegrationLicensed Siemens SIVACON Technology Partner. Vrielmann manufactures SIVACON S8 low-voltage energy distributors with SENTRON protection, switching, measurement, and monitoring devices. Tested to IEC 61439 with arc-fault safety per IEC 61641 and VDE 0660 Teil 500-2. Also showcased SF6-free 8DJH24 blue GIS switchgear via Siemens Showtruck.
• Deutsche Gesetzliche Unfallversicherung (DGUV)coreOthersConsultants cooperate with DGUV, regulatory authorities (Aufsichtsbehörden), courts (Gerichte), and certifiers (Zertifizierer) to ensure comprehensive and legally compliant consulting. DGUV V1, DGUV V3, and DGUV Information 203-077 form part of the regulatory framework for Vrielmann's services.
• Verteilnetzbetreiber (Distribution Network Operators)coreChannel Partner/ Reseller/ DistributorVrielmann coordinates technical planning and approvals with responsible distribution network operators (Verteilnetzbetreiber) for every transformer station project and grid connection. Also coordinates maintenance scheduling with energy suppliers. Digital remote control technology enables secure data exchange between customer installations and grid operator control systems via IEC60870, IEC61850, and Modbus protocols.

Scale indicators6 records

Recent moves10 records

Expansion highlights5 records

Broad incumbents

• Eaton: Global power management incumbent with strong medium-voltage and low-voltage switchgear offerings. Targets similar industrial and utility customers in Germany and competes for the same project-based transformer and switchgear deals.
• Siemens: Global electrical equipment incumbent. Vrielmann is a licensed Siemens SIVACON Technology Partner for SIVACON S8 low-voltage energy distributors, while Siemens competes broadly across transformers, switchgear, and grid automation with Vrielmann's customer base.
• Rittal: German Mittelstand incumbent in electrical enclosures and power distribution infrastructure. Sells into the same industrial and infrastructure customer base as Vrielmann, with broader product scope including enclosures, climate control, and IT infrastructure.
• ABB: Global incumbent in power transformers, distribution transformers, and switchgear. Directly competes with Vrielmann in industrial and utility transformer station projects across Germany and broader Europe.
• Schneider Electric: Global electrical equipment and industrial automation incumbent. Competes in low-voltage switchgear, power distribution, and grid equipment categories overlapping Vrielmann's portfolio, with broader product and service scope.

Direct peers

• Maschinenfabrik Reinhausen: German family-owned Mittelstand specialist in power transformer tap changers and regulation equipment. Closely comparable in scale, ownership structure, and regional Mittelstand positioning to Vrielmann, serving overlapping utility and industrial transformer customers.
• SEDOTEC: German manufacturer of low-voltage switchgear systems and VAMOCON energy switching device combinations. Vrielmann is a long-standing SEDOTEC system partner, and both companies compete and collaborate in the same German Mittelstand switchgear segment.
• Wöhner: German Mittelstand manufacturer of busbar systems and power distribution components. Operates in the same German low-voltage power distribution market with a similar Mittelstand profile and customer overlap with Vrielmann.
• Driescher (Driescher Wegberg): German specialist manufacturer of medium-voltage switchgear for utilities and industry. Closely comparable as a German Mittelstand manufacturer serving the same DNO and industrial transformer station customer base as Vrielmann.
• Hensel: German Mittelstand manufacturer specializing in electrical installation distributors, cable distribution cabinets, and low-voltage power distribution systems. Closely comparable product portfolio and customer segments to Vrielmann's installation distributor business.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/vrielmanngruppe
• Instagraminstagram.com/vrielmann.gmbh
• Xx.com/Vrielmann
• LinkedInlinkedin.com/company/vrielmann-gmbh

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles10 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Vrielmann