Siemens Numerical Protection Relay 7SJ5311-4EA02-1AA0/FF

Description

The Siemens 7SJ5311-4EA02-1AA0/FF is a high-performance numerical protection relay from the SIPROTEC 7SJ531 series, engineered to safeguard motors and power lines in industrial power networks. It offers fast fault detection, advanced monitoring, and flexible communication, ensuring operational safety and system stability in demanding environments. This relay supports multiple protection functions, including overcurrent, short-circuit, and earth fault protection. Moreover, it integrates seamlessly with SCADA systems using IEC 870-5-103 and IEC 61850 protocols, enabling real-time data exchange and remote control. Its modular hardware and software design allow for easy expansion and customization, while the built-in graphic display provides intuitive local operation and diagnostics. In addition, the relay is configured using Siemens’ DIGSI software, which simplifies parameter setting, event analysis, and firmware updates. Its rugged construction and CE/RoHS certifications make it suitable for long-term deployment in harsh industrial environments.