Protection relays for digital substations

SIPROTEC and Reyrolle protection relays

SIPROTEC 5: Advance Energy Solution for Electrical Energy Systems

Protection relays are essential for network operators, electricity suppliers, and industrial enterprises in every sector. For over 100 years, Siemens has been offering successful and always innovative SIPROTEC and Reyrolle protection relays and technologies. This means long-term user satisfaction with the products and solutions, with services, and with a partnership with a genuine global player. Siemens is the ideal partner for overcoming the challenges of the digital future.

Highlights, technical applications and product updates for substation automation and protection engineers.

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Easy protection relay selector

Easy protection relay selector

This tool gives a quick guidance to find a protection relay of SIPROTEC 5, SIPROTEC 4, SIPROTEC Compact, Reyrolle which would fit your needs.

Industry Mall

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Highest availability even in harsh environment

SIPROTEC 5 and SIPROTEC Compact – Conformal Coating as standard

The new coating feature provides an additional level of protection for SIPROTEC devices used in extremely harsh environmental conditions.

Topics and applications

Solutions with SIPROTEC and Reyrolle protection relays

For over a century, innovative protection relay and control technology from Siemens has ensured a reliable power supply as well as secure and efficient grid operations. The comprehensive range of products and solutions meets all conceivable requirements.


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Application notes


Modular, flexible, intelligent

With SIPROTEC 5, Siemens is offering the most comprehensive protection portfolio in the industry.

SIPROTEC 5 sets the benchmark for protecting, automating, and monitoring your network. As an incomparably modular, flexible generation of intelligent digital field devices, SIPROTEC 5 offers a comprehensive product family with modular elements for every application and requirement that can be precisely configured to your application.

SIPROTEC 5 delivers maximum protection and flexibility throughout the entire lifecycle. Take advantage of the leading provider in the field of protection, a global partner that supports you every step of the way.

Learn more about SIPROTEC 5

Online configurator

Design your perfect solution with SIPROTEC 5 using our online configurator. You’ll have your solution of choice, in just a few mouse clicks.

Online configurator

Reyrolle Protection Relays

Protection Relay and Control technology

Protecting Grids with Confidence

The protection, control, monitoring and measuring of our power networks is a vital element in managing our electrical assets, increasing reliability, sustainability and the safety of operating personnel. Our goal is to provide protection devices which provide flexible solutions and easy integration into an energy market which is becoming increasingly decentralized and digitalized. With the new Reyrolle5 we have listened to the changing needs of our customers.

Innovation highlights

Performance that moves you forward

A new flexible generation of innovative and intelligent field devices. Learn more about how SIPROTEC 5 can support you in your work.

Protection technology – proven worldwide


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