Our DC public lighting cabinet provides a solution to power public lighting rings with a bipolar +/-350V DC grid. It is equipped with solid-state circuit breakers that provide the following features:
- Fault clearance time of under 1 µs for enhanced safety and selectivity
- Residual Current Device (RCD) protection
- Solid-state protection for a bipolar DC grid operating at +/- 350V
- Remote control capabilities for efficient management
- Data monitoring and control over an astronomical clock
The cabinet depicted below is an example used in the DC Public Lighting Project in Delft. A tailored solution can be designed and implemented for each application. The cabinet has the following characteristics:
- 6A-16A 350/700V Bipolar DC Solid State Protection
- 12kW AC/DC Power Supply (in steps of 6kW)
- Connection option to external remote control
- Cabinet with separate compartment for grid connection
One major advantage of this DC setup is the ability to monitor the health of the cables in real-time, allowing for proactive maintenance planning. This not only increases system reliability but also reduces downtime and long-term operational costs. Through this project, Delft is setting a new standard in public lighting, leveraging modern DC technology to create a more sustainable and efficient urban environment.
Public lighting networks are more than just streetlights—they can play a crucial role in the energy transition. Research conducted by ROCC, TKI Urban Energy, and RVO explores how direct current (DC) technology and smart utilization of these networks can lead to significant benefits, such as:
- Energy savings of up to 24%
- Reduced material use (46% less copper)
- Enhanced control and monitoring
- Integration of additional services like EV charging and sensors
By leveraging existing infrastructure, municipalities can support sustainable innovations without major new investments.
Read the full study for insights into implementation and impact:
Download the report
Watch the video to see how DC public lighting grids can power the cities of the future: