Siemens SIPROTEC 5 line differential and distance protection relays combine both main protection principles in one device. Distance protection stays active as a back-up if the differential communication link is lost.
SIPROTEC 5 models
- 7SL82 – compact, non-modular device for distribution and sub-transmission lines
- 7SL86 – modular device for transmission lines with three-pole tripping
- 7SL87 – modular device with single- and three-pole tripping for transmission networks
Key functions
- Line differential protection (87L) and distance protection (21/21N) in one device
- Directional earth-fault protection (67N)
- Auto-reclosing (79) and synchrocheck (25)
- Breaker failure protection (50BF) and fault locator
- IEC 61850 communication and fault recording
Typical applications
Critical transmission and sub-transmission lines where two independent protection principles are required, and lines where the communication channel may be interrupted.
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.