Stable operation of critical DC systems
Power and grid installations require reliable DC systems for communication, switchgear, and control functions. Variable grid quality, high requirements for continuous operation, and the need for redundancy make correct system selection critical. Modular solutions provide flexibility during expansions, operation during service, and security in the event of faults. A stable DC supply ensures that critical components in substations, nodes, and control facilities operate independently of the condition of the power grid.
Typical setup for power and grid
A typical setup in the power and grid sector includes DC solutions that support continuous operation and high power quality. This includes:
- Customized DCPro systems
- Rectifiers and control modules from Eltek/Delta
- Modular architecture with flexible capacity expansion
- N+1 redundancy for increased availability
- Battery packs for energy storage
- Solutions for communication, control, and switchgear at substations
The solutions provide stable power supply in transformer substations, grid substations, control centers, and critical nodes.
Rectifier solutions from Eltek/Delta
Anda-Olsen integrates systems from Eltek/Delta and delivers complete DC systems at multiple voltage levels:
- 24 V
- 48 V
- 110 V
- 220 V
These solutions are used in facilities where communication systems, control equipment, and switchgear require stable DC supply to operate during both normal operation and fault conditions. The combination of rectifier modules, control units, and the right battery technology provides predictable and stable operation in demanding power environments.
Products and components
The DC solutions are built as modular systems tailored to the needs of the installation.
DCPro 24 V and 48 V
Floor-mounted rectifier system with integrated batteries and circuit breakers. Typically used in applications with lower voltage and a need for modular capacity.
DCPro Compact 24 V, 48 V, 110 V and 220 V
A compact wall-mounted solution for installations that require multiple voltage levels and flexible design. Used together with external battery banks or as a power supply for dedicated sub-distributions.
Eltek/Delta components
- Flatpack – rectifier module with high efficiency that converts AC to DC
- Rectiverter – charger rectifier that combines AC and DC outputs in one module
- Smartpack – control module that monitors load, charging, temperature, and system status
This combination provides flexibility, precise control, and predictable operation.
Modular and redundant architecture
Modular DC systems enable operation during service and easy capacity expansion. N+1 configuration is often used to achieve high availability. This ensures:
- Stable maintenance charging of batteries
- Operation for low-voltage DC applications
- Robust power supply for communication systems and automation
- Supply to switchgear and critical control functions
The architecture makes it possible to replace modules without interruption, increasing operational reliability in installations where downtime is not acceptable.
Applications in the power and grid sector
DCPro and Eltek/Delta solutions are used for:
- Securing communication systems
- Supplying switchgear and switchgear equipment
- Backup in transformer substations and grid substations
- DC supply in control centers and control rooms
The systems provide stable operation during grid disturbances and ensure that critical functions continue to operate even in the event of failures in the high-voltage grid.
Stationary batteries
Stationary batteries provide energy storage for DC installations with high requirements for lifetime and stability. Two technologies are most commonly used:
OPzV
- Gel batteries that are maintenance-free
- Withstand deep discharge well
- Shorter design lifetime than OPzS, but easy operation and installation
OPzS
- Flooded lead-acid batteries with vents
- Require ventilation and periodic refilling
- With proper operation can last longer than OPzV
- Robust construction that withstands heavy load over time
Both technologies are developed for high capacity, long lifetime, and demanding environments in power and grid installations.
Industrial operational reliability in power systems
The combination of DCPro, Eltek/Delta solutions, and stationary batteries provides a complete DC supply with high operational reliability. Modular design, redundancy, and flexibility make the systems well suited for substations where interruptions are not acceptable. The solutions handle both stable and variable loads and provide safe operation even during major grid disturbances.
Takeaway
Power and grid installations require stable and modular DC systems for communication, switchgear, and control functions. DCPro and Eltek/Delta solutions provide flexible capacity, high availability, and support for multiple voltage levels. OPzV and OPzS provide robust energy storage. This ensures safe operation in critical power and grid environments.
