Protection of electrical grids

We provide digital protection for power systems: busbar, differential, distance, overcurrent, voltage, frequency, and combined protection, transient and fault recording, monitoring, and diagnostics.

The SI(emens) PROTEC(tion) devices lead the way in integrating protection, control, measurement, and automation functions in one unit.

Thanks to the homogeneous system platform and extensive experience of more than a million successfully operating devices in the field worldwide, SIPROTEC enjoys top recognition among users. SIPROTEC is the industry standard for digital protection technology today.

SIPROTEC family members:


SIPROTEC 4 protection and bay controller devices have proven their value for many years, being efficient, reliable, and future-proof. The low life cycle cost makes sustainable and profitable management possible.


SIPROTEC 5 is part of the new generation of incomparable modular, flexible, and intelligent digital field devices. With modularly designed hardware and software, the SIPROTEC 5 field devices are perfect for protection, control, monitoring, and measuring applications in electrical energy systems.


Perfectly suited for protection in distribution systems and industry, with minimal space requirement, SIPROTEC Compact devices provide a comprehensive range of functions in surprisingly compact housings.