Three-phase line Kita-Iwaki
The three-phase line Kita-Iwaki is a two-circuit power line for three-phase alternating current in Japan . It was built in 1999 and extends from the rear derailleur South Iwaki ( 南いわき開閉所 , Minami-Iwaki kaiheisho ; 37 ° 22 '53 " N , 140 ° 48' 16" O ) at Tamura for substation East Yamanashi ( 東山梨変電所 , Higashi-Yamanashi handensho ; 35 ° 35 '26 " N , 138 ° 47' 59" O ) at Otsuki . The high voltage lineis currently operated with an electrical voltage of 500 kV , but can be converted to 1.1 MV in the future without major modifications.
Bundled conductors each with eight individual conductors and 31.5 millimeters in diameter are used as conductors . The cable is designed for a maximum current of 4 kA . It is laid on masts 108 meters high, each with three trusses ; the spans of these trusses are 33, 32 and 31 meters (lower, middle and upper).
There are two such routes: the first 190 km route begins at the Kashiwazaki-Kariwa nuclear power plant and runs via the West-Gunma main line ( 西 群 馬 幹線 , Nishi-Gunma kansen ) from the West-Gunma switchgear ( 西 群 馬 開 閉 所 , Nishi-Gunma) kaiheisho ; 36 ° 37 '22 " N , 138 ° 48' 6" O ) at Nakanojō the substation East Yamanashi. It was built in 1993. The second route, built in 1999 with a length of 240 kilometers, consists of the main line East-Gunma ( 東 群 馬 幹線 , Higashi-Gunma kansen ) from the West-Gunma substation to the East-Gunma substation ( 東 群 馬 変 電 所 , Higashi-Gunma hendensho ; 36 ° 34 ′ 46 ″ N , 139 ° 13 ′ 26 ″ E ) near Kiryū and the main line south Iwaki ( 南 い わ き 幹線 , Minami-Iwaki kansen ) from west Gunma to the switchgear south Iwaki. They also passes through the rear derailleur Shin-Imaichi ( 新今市開閉所 , Shin-Imaichi kaiheisho ; 36 ° 42 '46 " N , 139 ° 49' 57" O ) at Nikko , but that has no connection to this line.
Map with all coordinates: