Zillion SFS
Smart fuse switch | lower solution

The SFS – Bottom-Mounted Smart Fuse Switch is an integrated solution that combines protection, sensing and advanced electrical monitoring directly at the feeder level within the low-voltage switchboard. This enables accurate electrical measurement without the need for additional external devices, simplifying the system architecture from the outset.

The solution natively integrates the SAL – Advanced Line Supervisor together with the TSA – Advanced Supervision Board, incorporating current transformers directly into the fuse switch base. As a result, the SFS transforms conventional protection into an intelligent asset capable of generating reliable and comparable electrical data.

In addition, its bottom-mounted design supports a compact and organised switchboard layout. It also allows the safe replacement of electronic boards while energised, without interrupting the power supply, improving operational continuity.

As part of the Zillion ecosystem, the SFS provides a solid foundation for advanced network monitoring, diagnostics and operation. The data collected can therefore be used consistently alongside the rest of the ecosystem’s solutions.

SFS – Bottom-Mounted Smart Fuse Switch-0

SFS – Bottom-Mounted Smart Fuse Switch-1

Value proposition

Protection and monitoring in a single device. The SFS integrates NH fuses, current transformers and advanced monitoring into a single fuse switch, eliminating the need for additional metering equipment.
Integrated and accurate electrical measurement. Electrical signals are captured at the protection point, ensuring data consistency, accuracy and reliability from the source.
Compact and streamlined architecture. The lower-position design and reduced cabling simplify the low-voltage distribution panel, improving layout, safety and ease of installation.
Operational continuity. Electronic cards can be replaced under voltage, avoiding power interruptions during maintenance or upgrade operations.

Primary use case

Advanced electrical monitoring for low-voltage distribution boards that require a compact, integrated, and native solution, combining NH fuse-based protection with electrical monitoring at the line-side connection point. The SFS is particularly well-suited for new switchboards or retrofit projects where an organized, scalable architecture—ready for grid digitalization—is required. In this setup, the intelligent, bottom-mounted fuse base allows for the integration of both protection and advanced electrical monitoring directly at the line-side connection point.

What the SFS oversees

Line and phase currents via integrated transformers.

Electrical voltages captured at the protection point.

Three-phase electrical parameters processed by the TSA.

Key information for network operation, diagnostics, and maintenance.

Integration into the Zillion ecosystem

The bottom-mounted SFS acts as an integrated monitoring element from the outset, allowing electrical protection and monitoring to coexist on a single base. In this way, the data obtained is seamlessly integrated with other Zillion solutions, providing a coherent and unified view of the low-voltage network.