Siemens SIPROTEC 5 line differential protection relays compare current at both ends of a line or cable and trip only for faults inside the protected section. They give fast, selective protection that does not depend on line length or source strength.
SIPROTEC 5 models
- 7SD82 – compact, non-modular device for distribution lines and cables
- 7SD86 – modular device for transmission lines and multi-ended lines
- 7SD87 – modular device with single- and three-pole tripping for transmission networks
Key functions
- Phase-segregated line differential protection (87L)
- Protection data exchange over fibre optic or communication networks
- Back-up overcurrent and earth-fault protection (50/51, 67N)
- Auto-reclosing (79) and breaker failure (50BF)
- Fault recording and IEC 61850 communication
Typical applications
Short lines and cables, lines with series compensation or tapped loads, industrial and oil & gas plant interconnections, and utility transmission networks.
Why buy through Cynomatic
- Local Calgary support for selection, configuration (DIGSI 5) and ordering
- Help matching the right I/O, CT/VT and communication options to your project specification
- Supply for utilities, oil & gas, water and industrial projects across Western Canada
Need a quote or help choosing a configuration? Contact our team or email info@cynomatic.com. See the full SIPROTEC 5 protection relay range.