Optical Fault Location and Temperature Monitoring of a 220 kV Power Cable Denmark The project: Horns Rev 3 is Den m a rk’ s 3 rd offshore wind farm (OWF). The project consists of: • An offshore transformer platform • A 220 kV offshore power cable from the platform to the transition joint located onshore and then to the substation (36 km) • A 220 kV underground land cable from the substation to the 2 nd substation (45 km). The sensor cables: • Loose tube fiber optical cable with 4x12 G.652D single mode fibers and 1x6 OM3 multimode fibers. • At the subsea section, the sensor cable is located inside the three phase subsea cable, which is buried 1 m below the seabed. • At the land section, the sensor cable is located in a Ø40 tube close to the center single phase cable, which is buried 1.4 m

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