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

Main features

NH Fuse Switch with Integrated Electrical Monitoring.
Bottom-mounted design for a compact switchboard architecture.
Current transformers integrated into the fuse switch base.
Native integration of the SAL – Advanced Line Supervisor and the TSA – Advanced Supervision Board.
Direct acquisition of electrical signals at the protection point.
Safe replacement of electronic boards while energised, without interrupting the power supply.
Reduced wiring for a cleaner and more organised installation.
Compatible with new and existing low-voltage switchboards.

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.

Main use case

Advanced electrical monitoring in low-voltage distribution boards requiring a compact, integrated and native solution combining NH fuse protection and electrical monitoring directly at the feeder level. The lower-mounted SFS is particularly suitable for new distribution boards or retrofit projects where a clean, scalable architecture ready for grid digitalisation is required. In this configuration, the lower-mounted smart fuse switch integrates protection and advanced electrical monitoring directly at the feeder level.

Line and phase currents measured through integrated current transformers.

Voltage measurements captured at the protection point.

Three-phase electrical parameters processed by the TSA.

Key information to support network operation, diagnostics and maintenance.