Busbar protection

Why SIPROTEC 7SS52?

The SIPROTEC 7SS52 numerical protection offers selective, reliable and fast protection for busbar faults and breaker failure in medium, high and extra-high voltage substations with various busbar configurations.

Busbar faults and breaker failures can compromise power system stability, especially in applications with high fault levels. The SIPROTEC 7SS52 provides a very short tripping time for rapid fault clearance. Its modular hardware adapts to your busbar configuration. A decentralized arrangement reduces cabling costs.

Enjoy precise fault isolation from busbar differential protection with selective zone tripping. Achieve stability against external faults with a short saturation-free time.

This product is currently being phased out. Contact your Siemens representative for details.

Key benefits

Maintain stability

Achieve rapid fault clearance with our protection system to maintain the stability of your power system. Minimize disruptions and deliver continuous, reliable operation of your electrical infrastructure.

Reduce costs

Lower your substation cabling costs through our decentralized protection arrangement. Simplify installation processes and reduce labor time for more efficient project execution.

Optimize protection

Adapt protection to various switchgear types and busbar configurations, including single, double or triple systems, across diverse substation layouts.

Featured capabilities

Take advantage of selective zone tripping, a very short tripping time (<15 ms), stability against external faults, short saturation-free time (≥2 ms), an integrated check zone and phase-segregated measuring systems.

Modular hardware and decentralized design

Deploy modular hardware to match your busbar configuration. Use a decentralized arrangement to reduce cabling costs within the substation and streamline installation and maintenance.

Breaker protection functions