Manufacturing of type-tested low- and medium-voltage switchgear up to 36 kV, transformer substations, excitation systems and copper busbars for industry and power plants.
SKS Elektroanlagenbau GmbH
Fohnsdorf (Viktor-Kaplan-Straße 2)New on Amplifa
Switchgear manufacturing for industry, power plants and infrastructure
SKS Elektroanlagenbau GmbH manufactures in Fohnsdorf type-tested low- and medium-voltage switchgear up to 36 kV, walk-in and compact transformer substations, static excitation systems (THYRIPOL/SES) as well as metering panels and cable assemblies for low and medium voltage. In its own metalworking shop, panels and cells are fabricated from sheet steel; in the in-house copper workshop, copper busbars and contact systems are produced in all standard cross-sections. Every switchgear assembly passes through the in-house testing field with high-voltage tests up to 100 kV, high-current tests, impulse voltage tests up to 170 kV and partial discharge measurements according to IEC 60270. The company works in licensed partnership with Siemens AG and Siemens Energy, among other things on furnace switchgear for steel and aluminium plants. Customers come from power plants, the steel and aluminium industry, chemicals and paper, semiconductor manufacturing, infrastructure as well as plant engineering and EPC. With around 4,000 m² of production space including assembly, commissioning and Europe-wide service, SKS covers projects from new build to retrofit.
- Site
- Fohnsdorf
- Processes
- Manufacturing of type-tested low-voltage switchgear (new build), Low-voltage switchgear retrofit, Medium-voltage switchgear new build/retrofit up to 36 kV (licensed Siemens partnership), Furnace switchgear (OSA) up to 36 kV, Siemens designs GH23, 8BJ20, 8BK20, Mechanical fabrication of panels and cells in own metalworking shop, Copper busbar processing: cutting, sawing, punching, bending, drilling, pressing-in of nuts, Electrical testing in the testing field: high-voltage tests up to 100 kV, cable and continuity tests, Impulse voltage tests up to 170 kV, AC withstand voltage tests up to 70 kV, partial discharge
- Materials
- Flat copper 40x10 mm (busbars), Copper (copper busbars, contact systems, all standard cross-sections), Sheet steel (switchgear cabinet/cell construction), Reinforced concrete C40/50/B3 (transformer substations), Aluminium (entrance doors, raised floor frames), Medium-voltage cable NA2XS2Y, Copper, Sheet steel
- Certificates
- ISO 9001, SIVACON Technology Partner, KTA 1401
- Industries
- Switchgear manufacturing, Steel and aluminium plants, Power plants, Paper industry, Chemicals/petrochemicals, Semiconductors
- 01
Engineering and project planning (EPLAN, AutoCAD, load flow/short-circuit
- 02
Mechanical fabrication of panels/cells (metalworking shop)
- 03
Copper busbar processing (copper workshop)
- 04
Electrical fabrication and wiring
- 05
Testing field incl. FAT
- 06
Assembly and commissioning
- 07
Service, overhauls and retrofit
Materials and processes
Copper
Copper busbars, contact systems and busbar insulation in all standard cross-sections, including flat copper 40x10 mm.
Sheet steel
Construction of switchgear cabinets, panels and cells in modular design in the own metalworking shop.
Aluminium
Entrance doors and raised floor frames of walk-in transformer substations.
Reinforced concrete
Tub and building of factory-manufactured walk-in transformer substations (REI 90).
Locations
Fohnsdorf
ATManufacturing, metalworking shop, copper workshop, testing field, engineering
- Lot size
- Prototype, small series, medium series
- Materials
- Copper, sheet steel, aluminium, reinforced concrete
- Overhead crane 40 t
- High-voltage test equipment up to 100 kV
- Impulse voltage test system up to 170 kV
- AC withstand voltage test system up to 70 kV
- Partial discharge measuring device (IEC 60270)
- Machines for copper busbar processing (saws, punching, bending, drilling)
- Photovoltaic system
- Hydrogen storage
Components and products
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Manufacturing of type-tested low-voltage switchgear (new build)Assembly | – | – | – | – | Sheet steel, Copper, Cable/wires |
| Low-voltage switchgear retrofitAssembly | – | – | – | – | – |
| Medium-voltage switchgear new build/retrofit up to 36 kV (licensed Siemens partnership)Assembly | – | – | – | – | Sheet steel, Copper |
| Furnace switchgear (OSA) up to 36 kV, Siemens designs GH23, 8BJ20, 8BK20Assembly | – | – | – | – | Sheet steel |
| Mechanical fabrication of panels and cells in own metalworking shopJoining | – | – | – | – | Sheet steel |
| Copper busbar processing: cutting, sawing, punching, bending, drilling, pressing-in of nutsMachining | – | – | – | – | Copper |
| Electrical testing in the testing field: high-voltage tests up to 100 kV, cable and continuity testsTesting | – | – | – | – | – |
| Impulse voltage tests up to 170 kV, AC withstand voltage tests up to 70 kV, partial dischargeTesting | – | – | – | – | – |
| Circuit breaker overhauls: inspection, maintenance, contact resistance measurement, trip testingTesting | – | – | – | – | – |
| Engineering, product development and certification (EPLAN, AutoCAD, prototyping, function tests)Engineering | – | – | – | – | – |
| Assembly and commissioning of switchgear and transformer substations, Europe-wideAssembly | – | – | – | – | – |
| Static excitation systems THYRIPOL (SES) 1,300–7,700 A generator field current (Siemens EnergyAssembly | – | – | – | – | – |
| Manufacturing of walk-in transformer substations ENERGYLINE BB FLEX (10/20/30 kV, LV up to 7,000 A)Assembly | – | – | – | – | Reinforced concrete C40/50/B3, Aluminium, Steel |
| Manufacturing of compact transformer substations up to 36 kV (concrete and steel design)Assembly | – | – | – | – | Concrete, Steel |
| Manufacturing of metering panel SKS EnergyLine MU 20 (type-tested DIN EN 62271-200)Assembly | – | – | – | – | Sheet steel, Flat copper 40x10 mm |
| Medium-voltage cable assembly (10–36 kV): terminations, joints, plug-in connectors,Joining | – | – | – | – | NA2XS2Y (medium-voltage cable) |
| Low-voltage cable assembly: conductor end sleeves, connectors, cable lugs, testing andJoining | – | – | – | – | – |
| Charging infrastructure: DC charging systems EVMS (240–960 kW), dynamic load managementAssembly | – | – | – | – | – |
| Storage systems and energy systemsAssembly | – | – | – | – | – |
7 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Overhead crane | – | 1 | – | – | Fohnsdorf |
| Testing field with high-voltage test equipment (up to 100 kV) and high-current tests | – | – | – | – | Fohnsdorf |
| Impulse voltage test system (Impulse Voltage Test up to 170 kV) | – | – | – | – | Fohnsdorf |
| AC withstand voltage test system (AC Withstand Test up to 70 kV) | – | – | – | – | Fohnsdorf |
| Partial discharge measuring device (IEC 60270) | – | – | – | – | Fohnsdorf |
| Machines for copper busbar processing (saws, punching, bending, drilling, nut pressing) | – | – | – | – | Fohnsdorf |
| Photovoltaic system (site energy supply) | – | – | – | – | Fohnsdorf |
Additional services
Quality and testing field
Every manufactured switchgear installation is tested in the own testing field in Fohnsdelt according to current standards: insulation resistance, voltage withstand according to IEC 61439, high-voltage tests up to 100 kV, cable and continuity tests as well as customer acceptances (FAT) with test reports. Calibrated test equipment is used on a regular basis.
| Evidence | Fohnsdorf |
|---|---|
| ISO 9001 | |
| SIVACON Technology Partner | |
| KTA 1401 |
History
- 1998
Founded in January 1998 as a spin-off of the engineering and production facility Fohnsdorf of Siemens AG Österreich; initial location in the AIZ technology center Zeltweg.
- 2010
Acquisition by Barbara Isack-Heller as managing director in June; relocation to the new production site Fohnsdorf with 3,000 m² in October.
- 2023
SKS Elektroanlagenbau GmbH becomes part of the Conversio Group.
- 2025
Expansion of the site by 1,000 m² of production space (including 40-t overhead crane, photovoltaic system, hydrogen storage); certifications obtained for walk-in and compact transformer substations 200–5,000 kVA.