The SIPROTEC 7SS85 busbar protection delivers selective, safe and fast protection against busbar short circuits in medium, high, and very high voltage systems. Built on the flexible, scalable and user-friendly SIPROTEC 5 platform, it sets a new standard for busbar protection.
This solution integrates centralized, decentralized or hybrid busbar protection architectures while remaining fully IEC 61850 compatible and interoperable. The same device can collect process information directly and from distributed bay units, offering versatile and cost-efficient protection for distribution, industrial or infrastructure grids.
The SIPROTEC 7SS85 applies phase-selective measurement, disconnector-independent check zones and rapid tripping to minimize system damage and maintain network stability.
Configure all functions with DIGSI 5 and select bay units that match your hardware and protection requirements. Optional redundant communication improves system reliability.
Full IEC 61850 interoperability and process bus support allow seamless integration with existing SIPROTEC 5 devices, merging units and multivendor systems.
Supports a broad range of system layouts, including single to five-way busbars, breaker-and-a-half schemes, dual circuit-breaker systems, truck-type switchgear, combined busbar arrangements, H configurations and ring busbars.
Embedded role-based access control, event logging, signed firmware and IEEE 802.1X authentication protect critical substation operations and maintain compliance with industry standards.
Profile: 7SS85
Brochure: SIPROTEC 5
Catalog: SIPROTEC 5
Technical documentation | SIOS