
Manufacture of E-houses and switchgear systems as well as electrical installation, crane service and automation technology for industry.

Elektrotechnik Janssen GmbH
Nordenham · Port/terminal projects Rotterdam (Maasvlakte 2), Hamburg (Burchardkai), Ghent (Belgium), WilhelmshavenNew on Amplifa
About us
Elektrotechnik Janssen GmbH is a medium-sized electrical engineering company founded in Nordenham in 1967. Its core service is the construction of E-houses with complete switchgear systems, which are fully prefabricated at the Nordenham site. The range of services includes the engineering and design of switchgear systems with Eplan P8 and cablecalculations, manufacturing as one-off production or series, assembly, testing and commissioning. This is complemented by crane service (electrical installation, modernisation, commissioning, maintenance) on container cranes in ports, industrial service (maintenance, plant upkeep, building installation), automation technology with PLC programming (S5, S7) and process control technology, as well as fibre-optic network technology with thermal splicing and OTDR measurement. Customers include port and terminal logistics, the steel and metal industry, offshore wind, the cable industry and the aviation industry. In a consortium with ABB and crane manufacturer Hans Künz, the company realises, among other things, terminal projects such as Maasvlakte 2 in Rotterdam and the Burchardkai container terminal in Hamburg.
- Site
- Nordenham
- Processes
- Switchgear construction (design, manufacturing, assembly, commissioning, testing), Switchgear design with Eplan P8, cable calculations, Sistema (functional safety), Crane service: electrical installation, modernisation/retrofit, energy chain and cable drum assembly, Industrial service: maintenance & repair of production machinery, building installation, Network technology: copper cabling (twisted pair), fibre-optic installation, thermal splicing, Automation technology/process control technology: PLC programming (S5, S7), software development, Medium-voltage configuration, Switchgear construction (design, manufacturing, assembly, commissioning)
- Materials
- Copper (copper cabling), Optical fibre (glass fibre, single-/multimode), Copper (twisted-pair cabling), Optical fibre (single-/multimode glass fibre)
- Certificates
- DIN EN ISO 9001:2015, SCC** VAZ 2021 (Sicherheits Certifikat Contraktoren), SCC** VAZ 2021
- Founded
- 1967
- Industries
- Port and terminal logistics, Steel and metal industry, Offshore wind, Cable/specialty cable industry, Aviation industry, Chemicals/metal refining
- 01
Engineering and design (Eplan P8, cable calculations)
- 02
Manufacture of switchgear systems/E-houses in Nordenham
- 03
Assembly and electrical installation at the customer's site
- 04
Testing and OTDR/attenuation measurement
- 05
Commissioning, maintenance and construction site supervision
- 06
Software development and documentation
Materials and technologies
Copper (twisted-pair cabling)
Installation and assembly of copper data cables including attenuation and length measurement.
Optical fibre (single-/multimode glass fibre)
Thermal splicing, connector terminations, pigtails and qualified OTDR measurement for data and communication networks.
Locations

Nordenham
DEHeadquarters, manufacture of E-houses and switchgear systems, administration
- Lot size
- One-off production and series production
- Materials
- Copper (cabling), fibre-optic glass fibre
- Switchgear manufacturing
- Fibre-optic splicing and measurement technology
- Eplan P8
- PLC/control system development (S5, S7, WinCC)
Products and systems




Inside the production




Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Switchgear construction (design, manufacturing, assembly, commissioning, testing)Assembly | – | – | – | – | – |
| Switchgear design with Eplan P8, cable calculations, Sistema (functional safety)Engineering | – | – | – | – | – |
| Crane service: electrical installation, modernisation/retrofit, energy chain and cable drum assemblyAssembly | – | – | – | – | – |
| Industrial service: maintenance & repair of production machinery, building installationAssembly | – | – | – | – | – |
| Network technology: copper cabling (twisted pair), fibre-optic installation, thermal splicingAssembly | – | – | – | – | Copper, Optical fibre (glass fibre) |
| Automation technology/process control technology: PLC programming (S5, S7), software developmentEngineering | – | – | – | – | – |
| Medium-voltage configurationAssembly | – | – | – | – | – |
Additional services
Reference customers
Quality and certification
The implementation of a quality management system in accordance with DIN EN ISO 9001:2015 and an occupational safety management system according to SCC** VAZ 2021 are certified by TÜV NORD; fibre-optic connections are tested and documented using OTDR and attenuation measurements.
| Evidence | Nordenham |
|---|---|
| DIN EN ISO 9001:2015 | |
| SCC** VAZ 2021 |
Company history
- 1967
Founded on 01.07.1967 by master electrician Heinrich Janßen; activities in Nordenham's local industry (industrial service).
- 2008
Participation in the Maasvlakte 2 terminal construction in Rotterdam with ABB; assembly work until 2017 on 54 stacking cranes, 2 rail-mounted cranes and 10 container gantry cranes.
- 2010
Initial certification of the SCC** occupational safety management system.
- 2017
Initial certification according to DIN EN ISO 9001:2015 by TÜV NORD.
- 2023
Recertification DIN EN ISO 9001:2015 by TÜV NORD CERT GmbH (valid until 2026-09-03).