380 kV Underground Power Line Monitoring

Brugg Kabel & Swissgrid selected AP Sensing to monitor a new project at the Gaebihuebel in Switzerland. Throughout the duration of this project, a route of overhead lines will be replaced by underground power lines. Therefore, the operator needed a reliable and robust power cable monitoring system.


AP Sensing's 12-channel Distributed Temperature Sensing (DTS) system for power cable monitoring provides accurate temperature profiling for all power cable phases, plus indicates maximum temperatures and where these are located along the entire circuit. The system uses passive fiber optic cables which are non-intrusive and immune to electromagnetic interference (EMI). In addition to temperature monitoring, all 12 phases are monitored for fiber breaks which signal over integrated relays.

Read more here in the case study.