Conductor temperature vs. load (IEC 60287)
Steady conductor temperature at the live soil ambient for the buried stretch and for the road crossing (the rating-limiting stretch), cross-bonded; dashed: crossing if the screens were solidly bonded. Dot: conductor estimated from the DTS hottest point and the present load. Red line: 90 °C.
DTS temperature along the route
Screen temperature from the fibre, hottest point of each 300 m segment (bars), against the twin's IEC 60287 expectation at the equivalent current (line). Joints J1-J5 and the road crossing are marked; grey = no fibre signal.
Cable route
Substation A to substation B: sealing ends, joints J1-J5 with their link boxes (cross-bonding, earthing at J3), the road crossing, the DTS interrogator and the sensors, with live values. Red = beyond the twin's alarm limit.
Condition sensors
Bars against the alarm limits in the twin file (red line).