Reyrolle Siemens protection relays are designed for reliable and efficient safeguarding of electrical distribution systems. Known for their precision, durability, and advanced technology, these relays ensure the highest standards of safety and protection in industrial and commercial applications.

Key Features and Specifications:

Fast and Stable Protection:

• The relay utilizes an advanced phase comparison algorithm that provides rapid and stable line protection for both industrial and distribution grids. This ensures timely and accurate fault detection, essential for maintaining system reliability.

Flexible Communication Options:

• Protection interface communication is conducted directly without the need for external equipment. This can be achieved over copper wires, optical fibers, or a combination of both in a redundant manner. This flexibility enhances system resilience against communication failures.

Comprehensive Protection Functions:

• The SIPROTEC-7SD80 encompasses a wide range of non-directional and directional functions, which can serve as both emergency and backup protection. This allows for simplified and cost-effective protection concepts, particularly in meshed grids and busbar protection scenarios through reverse interlocking.

Guaranteed Selectivity:

• The relay ensures fast and selective tripping even if communication fails between relays, thus maintaining system stability and reducing the risk of cascading failures.

Control and Monitoring Capabilities:

• In addition to protection functions, the SIPROTEC-7SD80 provides comprehensive functionalities for control and monitoring. Its interoperability with substation control systems is facilitated through standard protocols like IEC 61850, ensuring seamless integration with existing infrastructure.

Redundancy for Increased Availability:

• The relay supports various Ethernet redundancy protocols such as PRP (Parallel Redundancy Protocol), HSR (High-availability Seamless Redundancy), and RSTP (Rapid Spanning Tree Protocol), enhancing overall system availability and reliability.

Simplified Commissioning:

• Integrated commissioning functions and user-friendly settings help to streamline the setup process, leading to short commissioning times and efficient operation.

Hardware Specifications:

Inputs:

• Supports 4 current transformers and 0/3 voltage transformers.
• Configurable 3/5/7 binary inputs that can be adjusted through software.

Outputs:

• Equipped with 5/8 binary outputs, including 2 changeover contacts, providing flexibility for various control applications.
• 1 life contact for monitoring the device status.

Terminal Flexibility:

• Features pluggable current and voltage terminals, simplifying installation and maintenance.

Line Protection Applications:

The SIPROTEC-7SD80 is ideal for selective line protection in high-voltage and medium-voltage systems, accommodating various neutral designs, including:

• Solidly grounded
• Low-resistance grounded
• High-resistance grounded
• Isolated or compensated systems
• It is particularly effective as a replacement for analog differential protection applications, providing enhanced functionality and flexibility.

In addition to its main protection function, the SIPROTEC-7SD80 offers numerous additional protection functions that can operate in parallel as backup or emergency functions if the main protection fails. This ensures comprehensive protection for transmission lines and contributes to the overall resilience of the power system.

Conclusion

The SIPROTEC-7SD80 line differential protection relay is a highly capable solution for ensuring the safety and reliability of power systems. Its advanced protection features, flexible communication options, and robust hardware make it an excellent choice for modern electrical networks, ensuring that they can operate safely and efficiently under a variety of conditions.