711 series set S-113 in January 2009
|In service||1968 – March 2015|
|Number built||114 vehicles (38 sets)|
|Number in service||None|
|Formation||3 cars per trainset|
|Line(s) served||Hakodate Main Line, Chitose Line, Muroran Main Line|
|Car body construction||Steel|
|Car length||20,000 mm (65 ft 7 in)|
|Width||2,950 mm (9 ft 8 in)|
|Doors||2 per side|
|Maximum speed||110 km/h (70 mph)|
|Traction system||Thyristor drive|
|Electric system(s)||20 kV AC (50 Hz)|
|Current collection method||Overhead line|
|Bogies||DT38 (motored), TR208 (trailer)|
|Safety system(s)||ATS-SN, ATS-DN|
|Track gauge||1,067 mm (3 ft 6 in)|
The 711 series (711系 711-kei)was an AC electric multiple unit (EMU) train type operated by Hokkaido Railway Company (JR Hokkaido) on Sapporo area suburban services in Hokkaido, Japan, from 1968 until March 2015. It was the first AC EMU train to be operated in Japan by the former Japanese National Railways (JNR). The last remaining trains in service were withdrawn on 13 March 2015.
By 1 October 2014, 36 vehicles (12 sets) were still in service, all based at Sapporo Depot.
The 711 series trains were formed as three-car sets with one motored intermediate car and two non-powered driving trailer cars, as shown below.
|Numbering||KuHa 711-200||MoHa 711-100||KuHa 711-100|
Car 2 was fitted with one N-PS785 single-arm pantograph.
Former prototype sets S901/902
The former prototype sets, S901 and S902 were formed as shown below.
|Numbering||KuHa 711-100||KuMoHa 711-900||KuHa 711-900|
Seating consisted of a mixture of transverse seating bays and longitudinal bench seating.
Two prototype 2-car sets, numbered KuMoHa 711-901 + KuHa 711-901 and KuMoHa 711-902 + KuHa 711-902, were delivered in February 1967 for test running ahead of the start of electric suburban services between Otaru and Takikawa from 1968. Both sets were based on the KiHa 22 diesel multiple unit design, but set 901 had opening two-pane windows and featured two sets of 4-leaf folding doors per side, whereas set 902 had sealed double-glazed windows, as used on the subsequent full-production sets. The two sets were modified to full-production standards in 1968 and 1970, but set 901 retained its opening windows.
The first full-production 3-car sets were delivered from August 1968. A third, centre, door was added to some of the KuHa 711 cars from 1987. All cars became no-smoking from 1 July 1992. Priority seating was added from 1 October 1997. Air conditioning was added to the 2-door sets between 2001 and 2002. The original scissors-type pantographs were replaced with N-PS785 single-arm pantographs between 2004 and 2005.
The last remaining sets in service were withdrawn on 13 March 2015.
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