Retrofit low voltage systems
Retrofitting low voltage systems in industrial settings
Outdated low-voltage systems increase risks to operational safety and supply reliability. SKS Elektroanlagenbau modernizes existing low-voltage systems in industrial facilities—from condition assessment and targeted component replacement through to commissioning in accordance with current standards, with minimal disruption to ongoing operations.
What is included in the retrofit
Typical measures for modernizing low-voltage systems:
Switching and protection devices
Replacement of obsolete circuit breakers, motor protection switches, and switch-fuse units with state-of-the-art devices offering improved selectivity.
Control and monitoring systems
Integration of modern PLC control systems, energy monitoring, and remote monitoring systems. Connection to higher-level control systems where required.
Standards compliance upgrade
Upgrade of the system to comply with current standards: DIN VDE, ISO, ÖNORM, and IEC 61439. Preparation of the required test documentation and updated circuit diagrams.
Cable and wiring work
Replacement of damaged cables or cables that no longer comply with current standards, wiring work for new components, and labelling in accordance with current requirements.
Technical specifications
| Parameter | Specification |
|---|---|
| Voltage level | Low voltage up to 1,000 V AC |
| Standards | DIN VDE 0660, IEC 61439, ÖNORM E 8001, ISO 9001 |
| Test documentation | Test report and updated circuit diagrams upon completion |
| Technology partners | Eaton, Schneider Electric, Siemens |
| Execution | SKS’s own technicians, with work coordinated in agreed stages |
| Installation and service | Austria and throughout Europe |
FAQ
What is a low-voltage system?
A low-voltage system is an electrical switchgear system designed for voltages of up to 1,000 V AC. It distributes electrical energy throughout a building or industrial facility—from the incoming power supply through the main and sub-distribution boards to the individual loads. A complete low-voltage system includes circuit breakers, motor protection switches, busbars, cable infrastructure, and measurement technology.
When is a retrofit more worthwhile than a new installation?
A retrofit is more cost-effective when the overall system structure and switchgear enclosure are still in good condition and only individual components need to be upgraded. Key factors include the condition of the main components, the availability of spare parts for the existing system, and the requirements regarding the maximum permissible operational downtime. SKS carries out a technical condition assessment before every project.
How are downtimes minimized during a retrofit?
The modernization is carried out in carefully planned stages aligned with the customer’s production or operating schedules. Work is typically performed during scheduled maintenance windows or outside peak operating hours. SKS coordinates the exact process with the operator in advance and prepares a detailed phased implementation plan.
Which standards apply to low-voltage systems in Austria?
In Austria, low-voltage systems are governed by ÖNORM E 8001 (the Austrian electrical engineering standard), with DIN VDE 0660 and IEC 61439 serving as the technical basis. Following a retrofit, SKS provides complete documentation, including the test report and updated circuit diagrams, as proof of compliance with the applicable standards.