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Configure flexible protection functions
Create up to 20 additional protection functions such as rate‑of‑change‑of‑frequency or reverse power so the relay adapts to evolving system needs without hardware changes.
Why SIPROTEC 7SJ80?
Built for dependable feeder protection across grounded, low‑resistance grounded, isolated or compensated networks, SIPROTEC 7SJ80 delivers proven selectivity and adaptability in a compact form factor. It also serves as a robust backup to transformer differential protection.
- Streamline protection, control and automation with integrated logic and modern communications
- Scale from basic overcurrent to advanced, user‑defined functions without changing hardware
Key benefits
Increase uptime with selective protection
Definite and inverse time overcurrent for phase and ground, directional stages and sensitive ground fault work together to clear faults quickly and limit service disruption, with backup for transformer differential protection.
Simplify automation and control
Use integrated circuit‑breaker control and programmable logic to implement interlocking and switching schemes directly in the relay, reducing external PLC complexity and engineering effort.
Modernize communications effortlessly
Leverage IEC 61850 with GOOSE messaging and redundant Ethernet options including RSTP, PRP and HSR to integrate reliably into digital substations and keep data flowing during network events.
Featured capabilities
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Control switchgear with built‑in logic
Implement interlocking, transfer and load shedding schemes using integrated CFC logic, enabling local automation that is fast, transparent and easy to maintain.
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Record faults for fast analysis
Capture oscillographic records and use the fault locator to speed post‑event diagnostics and restoration while improving protection settings over time.