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Flexible hardware configurations
Customize binary inputs and outputs within the 1/3 base module. Choose between large or small displays for optimal viewing. The modular design adapts to your operational requirements.
Why SIPROTEC 7SJ81?
The SIPROTEC 7SJ81 provides cost-effective and compact overcurrent protection of feeders and lines in medium-voltage systems. Deliver reliable operation and safeguard your infrastructure.
Protect your electrical equipment from short circuits and ground faults with SIPROTEC 7SJ81. Detect and selectively trip 3-pole short circuits in various network configurations. Identify ground faults in isolated or arc-suppression-coil ground power systems to minimize downtime.
Achieve higher availability, even in harsh conditions, with conformal coating on electronic boards. The cybersecurity features are compliant with NERC CIP and BDEW Whitepaper requirements.
SIPROTEC 7SJ81
Reduce costs on overcurrent protection
Enjoy low-cost overcurrent protection for feeders and lines in medium-voltage systems. The compact design provides essential protection without unnecessary complexity.
Enhance operational safety
Rely on powerful protection functions for safety in your electrical equipment. Conformal coating of electronic boards provide high availability even in extreme environmental conditions.
Simplify device management
Handle devices and software easily with a user-friendly design. Rely on cybersecurity measures like logging security-related events to protect your systems.
Featured capabilities
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Overcurrent protection functions
Utilize directional and non-directional overcurrent protection with additional functions. Detect ground faults of any type in compensated or isolated systems, including transient and intermittent ground faults.
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Advanced communication and cybersecurity
Support redundant communication protocols like IEC 61850-8-1, Modbus TCP and PROFINET IO for reliable data transmission. Role-based access control strengthens your cybersecurity.