
Development and manufacturing of built-in switches, built-in sockets and control technology for furniture, vehicle construction and building automation.

inprojal elektrosysteme gmbh
Lüdenscheid · GernrodeNew on Amplifa
Electrical special products since 1904
inprojal elektrosysteme gmbh is a specialized company for electrical special products headquartered in Lüdenscheid, with the registered company seat in Gernrode. Originating from the company Presto-Vedder founded in 1904, the company focuses on two business areas: special switch programs for furniture installation as well as control technology for home and building automation. The portfolio includes built-in switches, push-buttons, dimmers, Schuko and touch-protected sockets, snap-in sockets, media outlets, assemblies as well as time switches, relays, sensors and powerline and radio solutions for controlling roller shutters, venetian blinds and sun protection. As an OEM supplier, inprojal works with companies from the furniture, leisure and vehicle industries; the products are used in kitchen and bathroom furniture, caravan and boat building, trade fair and shop fitting, laboratory equipment and office design. Custom printing of surface rockers and assembly of socket combinations complement the manufacturing. Sales are handled in a three-tier structure via wholesalers and the processing trades in Germany and across Europe.
- Site
- Lüdenscheid
- Processes
- Development and manufacturing of special switch programs for furniture installation, Control technology for home and building automation (powerline, radio, time switches), Custom printing of surface rockers, Special solutions / OEM manufacturing, Assembly of sockets and combinations, Development of products with screwless spring-clamp technology, Technical customer consulting, Three-tier sales via wholesalers and the processing trades
- Materials
- Screwless spring-clamp technology, Powerline technology (NERO II), Radio technology (INTRO II), PWM DC dimmer, Splash-water-protected versions
- Certificates
- VDE 0632 / DIN EN 60669-1, EN 50065 / EN 60730 (Powerline), ISO 9001
- Founded
- 1904
- Industries
- Furniture industry (kitchen and bathroom furniture), Caravan and vehicle construction, Boat and shipbuilding, Trade fair and shop fitting, Laboratory equipment and devices, Office and workplace design
- 01
Development
- 02
Manufacturing
- 03
Custom printing
- 04
Assembly
- 05
Three-tier sales via wholesale and the trades
Products and technologies
Screwless spring-clamp technology
Connection technology of the Schuko product family introduced in 2007 for faster installation.
Powerline technology (NERO II)
Home automation via the 230V mains without additional wiring, patent applied for in 2006.
Radio technology (INTRO II)
Wireless control for roller shutters, venetian blinds and lighting.
PWM DC dimmer
LED dimmer 12V DC with 30 and 70 W power (since 2017).
Splash-water-protected versions
IP44 sockets and IP54 key switches for demanding environments.
Locations

Lüdenscheid
DESales, contact and manufacturing (company seat since 2017, Kerkhagener Weg 4)
- Materials
- Plastics, electronic components
- Modernized machine park (2019)
Gernrode
DECompany seat according to imprint (Auf den Steinen 8)
Products








Inside the production




Industries
Additional services
Quality and standards
The switches comply with DIN EN 60669-1 (VDE 0632) with 10/16 A rated current; powerline products are compliant with EN 50065 and EN 60730. No information is available on documented certificates such as ISO 9001.
| Evidence | Lüdenscheid |
|---|---|
| VDE 0632 / DIN EN 60669-1 | |
| EN 50065 / EN 60730 (Powerline) | |
| ISO 9001 |
Company history
- 1904
Foundation of the company Presto-Vedder in Schalksmühle as a classic switch manufacturer.
- 1980
Specialization in switch programs for furniture installation; development of time switches for roller shutters and sun protection.
- 1999
Spin-off into Vedder inpro (furniture-installation switch programs) and RoJal GmbH (control technology).
- 2000
RoJal GmbH develops a novel IP-54 key switch.
- 2004
Merger of RoJal GmbH and Vedder inpro to form inprojal elektrosysteme GmbH in January.
- 2006
Presentation of the powerline and radio product families; patent application for the NERO II technology.
- 2007
Installation of several NERO II reference projects; presentation of the Schuko product family with screwless spring-clamp technology.
- 2008
Participation in the pilot project 'Moderne Wohntechnologie Wohn Telematik' (Modern home technology – home telematics).
- 2009
Introduction of the 50x50-mm rocker switch and implementation of SAP.
- 2010
Expansion of the range with new relays and sensors for wind, sun and twilight.
- 2011
inprojal acquired by the qtec group.
- 2012
Introduction of the Rojal family, starting with the ROJAL M.
- 2013
Market launch of the design line system 20.000 and the ROJAL S.
- 2015
Portfolio expanded with the flush-mounted switch program LENORA.
- 2016
Market launch of USB charging units (12-24V DC and 110-240V AC) and the ROJAL SAT.
- 2017
Move to the new company seat at Kerkhagener Weg in Lüdenscheid; market launch of the design line system 30.000 and new LED dimmers (30/70 W, 12V DC).
- 2018
Development and sale of PCB push-buttons for controlling bus systems in motorhomes and caravans.
- 2019
Comprehensive modernization of the machine park; expansion of the possible color combinations.