Components for high-current systems made of copper and aluminium – expansion connectors, busbars, special components since 1922
Gebr. Kunz GmbH
Maxdorf/Palatinate · GermanyNew on Amplifa
About Gebr. Kunz GmbH
Gebr. Kunz GmbH develops and manufactures components for high-current systems made of copper and aluminium. Since the late 1960s, the development and production of high-current components has been the core business. The portfolio includes expansion connectors (GKKP, GKKS, GKAS, GKKH, GKKN), busbars, laminated busbars, grounding straps as well as turned parts, milled parts, welded parts and special components. Production takes place exclusively in Germany in multi-shift operation and ranges from prototypes and small series to high-volume series production with just-in-time delivery. In addition, the company offers engineering of high-current systems, creation of production drawings, overhaul as well as on-site assembly. Customers come from rail technology, wind and solar energy, energy infrastructure, the chemical industry, switchgear construction, automotive/e-mobility and battery storage. The mid-sized company with more than 50 employees is run by the third generation and supplies customers in Germany and worldwide.
- Site
- Maxdorf/Palatinate
- Processes
- Pressure-welded copper expansion connectors (GKKP), Inert-gas-welded copper expansion connectors (GKKS), Inert-gas-welded aluminum expansion connectors (GKAS), Pressure-riveted copper expansion connectors (GKKN), Highly-flexible copper expansion connectors (GKKH), Busbars (manufacturing), Laminated busbars (manufacturing), Grounding straps (manufacturing)
- Materials
- Cu-HCP, Copper (highly conductive copper), Aluminium, Copper
- Certificates
- DIN EN ISO 9001:2015, DIN EN ISO 3834-3, EN 15085-2 CL2, ISO 9001, Other (DIN EN ISO 3834-3), Other (EN 15085-2 CL2)
- Founded
- 1922
- Employees
- 50+
- Industries
- Welding technology, Rail & transport technology, Wind & solar energy, Grid expansion & energy infrastructure, Primary & chemical industry, Switchgear & switching devices
- 01
Consulting
- 02
Engineering & creation of production drawings
- 03
Manufacturing (machining, welding, riveting)
- 04
Just-in-time delivery
- 05
On-site assembly / overhaul
Materials & Processes
Cu-HCP
High-conductivity copper, as foils 0.05–0.5 mm for pressure-welded expansion connectors according to DIN 46 276
Copper
High-conductivity copper for expansion connectors, busbars, laminated busbars and grounding straps
Aluminium
Material for weldable expansion connectors (GKAS), busbars and welded components
Locations
Maxdorf
DEHeadquarters / Production
- Lot size
- Prototypes, small and high-volume series
- Materials
- Copper, aluminium
Components
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Pressure-welded copper expansion connectors (GKKP)Joining | – | – | – | – | Cu-HCP (foil 0.05–0.5 mm) |
| Inert-gas-welded copper expansion connectors (GKKS)Joining | – | – | – | – | Copper |
| Inert-gas-welded aluminum expansion connectors (GKAS)Joining | – | – | – | – | Aluminium |
| Pressure-riveted copper expansion connectors (GKKN)Joining | – | – | – | – | Copper |
| Highly-flexible copper expansion connectors (GKKH)Joining | – | – | – | – | Copper |
| Busbars (manufacturing)Engineering | – | – | – | – | Copper, Aluminium |
| Laminated busbars (manufacturing)Engineering | – | – | – | – | Copper |
| Grounding straps (manufacturing)Engineering | – | – | – | – | Copper |
| Turned partsMachining | – | – | – | – | Copper, Aluminium |
| Milled partsMachining | – | – | – | – | Copper, Aluminium |
| Welded parts and special componentsJoining | – | – | – | – | Copper, Aluminium |
| Engineering of High Current InstallationsEngineering | – | – | – | – | – |
| Overhaul of high-current systemsAssembly | – | – | – | – | – |
| Mounting / on-site assemblyAssembly | – | – | – | – | – |
| Welding of rolling stock (EN 15085-2 CL2)Joining | – | – | – | – | – |
| Welding specialists (DIN EN ISO 3834-3)Joining | – | – | – | – | – |
Additional services
Quality
Quality assurance follows a QM system according to DIN EN ISO 9001:2015 along the entire process from order acceptance through manufacturing to delivery. Welding work is carried out according to DIN EN ISO 3834-3 as well as EN 15085-2 CL2 (welding of rail vehicles).
| Evidence | Maxdorf |
|---|---|
| ISO 9001 | |
| Other (DIN EN ISO 3834-3) | |
| Other (EN 15085-2 CL2) |
History
- 1922
Founding of Gebr. Kunz GmbH, initially a craft business
- 1960er
Start of the development and production of components for high-current systems
Company managed by the 3rd generation