Siemens Smart Infrastructure has used semiconductor technology and smart protection algorithms in its new portfolio of direct current (DC) protection and switching solutions, enabling up to 1,000 times faster interruption of short circuits than conventional systems.
The new offering, including the innovative SENTRON 3QD2 semiconductor circuit breaker and the SIRIUS 3RF5 solid-state switching device, is designed to meet the growing demand for sustainable, efficient and reliable low-voltage power distribution and industrial switching technology. The solutions are particularly important in high-performance applications such as data centres, especially AI-enabled factories, production facilities and battery storage systems, as well as for the integration of renewable energies.
The shift from widely used AC (Alternating Current) systems towards DC technology is a critical step in the global energy transition. Renewable energy sources like photovoltaics (PV) and battery storage systems generate or store electricity as direct current. By reducing conversion (DC to AC) losses and enabling the direct integration of renewable energy sources, DC systems offer a more efficient and sustainable alternative to traditional AC grids.
The advantages of DC solutions extend beyond individual products. By implementing DC grids, customers can achieve significant cost and material savings. For example, in a manufacturing setting with the use of robots, applying DC technology combined with energy recuperation and storage can reduce peak power demand by up to 80 percent, leading to substantial cost reductions. Furthermore, DC systems eliminate the need for reactive power compensation and require less copper in cabling, resulting in up to 50 percent material savings and a smaller environmental footprint.
The parametrisable SENTRON 3QD2 combines protection, switching, monitoring, and energy management in a single compact and multifunctional unit, replacing multiple components and saving significant space. Being maintenance-free with no mechanical wear parts, the SENTRON 3QD2 ensures a long service life and maximum plant availability, making it ideal for critical infrastructure.
SIRIUS 3RF5is a solid-state switching device, the first of its kind for DC applications. It is designed for high-frequency switching of resistive loads, offering a low wear and durable solution that enhances the efficiency and availability of industrial plants. The SIRIUS 3RF5 also carries the Siemens EcoTech Label, highlighting its sustainable and transparent product design.
