TEPCO Illustrated

Electricity Supply Facilities
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1MV Designed Power Transmission Lines (UHV: Ultra High Voltage Lines)

As of the end of FY2016

  Nishi-Gunma Trunk Line Minami-Niigata Trunk Line Higashi-Gunma Trunk Line Nishi-Iwaki Trunk Line
Section Nishi-Gunma Switching Station - Higashi-Yamanashi Substation Kashiwazaki-Kariwa Nuclear Power Station - Nishi-Gunma Switching Station Nishi-Gunma Switching Station - Higashi-Gunma Substation Minami-Iwaki Switching Station - Higashi-Gunma Substation
Length 137.7km 110.8km<61.2km> 44.4km 195.4km
Voltage and Number of Circuits 1MVdesign 2 circuits 1MV design 2 circuits <a portion is 500 kV> 1MV design 2 circuits 1 MVdesign 2 circuits
Power Lines ACSR
610mm2, 810mm2×8 conductors
ACSR
610mm2, 810mm2×8 conductors
<810mm2×4 conductors>
ACSR
610mm2, 810mm2×8 conductors
Low-noise ACSR
960mm2×8 conductors
ACSR
610mm2, 810mm2×8 conductors
Low-noise ACSR
940mm2, 960mm2×8 conductors
Pylons Number: 217
Height: 111m average
Number: 201 <114>
Height: 97m <89m> average
Number: 70
Height: 115m average
Number: 335
Height: 119m average
Start of Construction September 1988 March 1989 September 1992 November 1995
Start of Operation April 1992 October 1993 Line 2: April 1999 Line 2: July 1999
Line 1: June 1999 Line 1: October 1999

(Note)

  1. Contents in brackets apply to sections designed for 500kV.