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Differential and distance protection
Integrate two full-scheme main protections in one unit: differential and non-switched distance protection. Protect lines with two up to six line ends.
Why SIPROTEC 7SD5?
The SIPROTEC 7SD52/53 relay provides full scheme differential protection for power lines. It protects lines with two to six ends across all power levels for high-speed fault clearance.
Complex electrical power systems can struggle with reliability and availability during fluctuating fault conditions. Our relay provides comprehensive protection for transformers and compensation coils within the differential zone. Use fiber-optic cables or digital communication networks for secure data exchange to improve system resilience.
Integrate two full-scheme main protections, differential and distance, into one unit for simplified design. Achieve high-speed tripping within 10 to 15 ms to minimize fault impact.
This product is currently being phased out. Contact your Siemens representative for details.
Key benefits
Improve availability
Deliver reliability for your electrical power system. Use our relay's leading protection and high-speed fault clearance to minimize downtime. Maintain stable power delivery for critical infrastructure.
Increase selectivity and speed
Enhance selectivity and high-speed tripping with advanced teleprotection schemes. Isolate faults to minimize network disruption.
Capture accurate readings
Obtain precise fault readings from both line terminals, even under challenging system conditions. Access readings immediately after fault clearance to quickly clear lines and restore service.
Featured capabilities
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Precise fault locator
Use the fault locator for precise fault location to enable quick line clearance and system restoration.
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Communication media
The relays provide optical ports for relay-to-relay (R2R). The adjustment to other communication media takes place via media converter and accepts all types of communication media: fibers, comms networks and pilot wires.