711 series

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to be operated in Japan by the former Japanese National Railways (JNR).^[1] The last remaining trains in service were withdrawn on 13 March 2015.^[2]

711 series
711 series set S-113 in service in January 2009
In service	1968 – March 2015
Manufacturer	Hitachi Kawasaki Heavy Industries Kisha Seizo Tokyu Car
Constructed	1967–1980
Number built	114 vehicles (38 sets)
Number in service	None
Number preserved	3 vehicles
Formation	3 cars per trainset
Operators	JR Hokkaido
Depots	Sapporo
Lines served	Hakodate Main Line, Chitose Line, Muroran Main Line
Specifications
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 (68 mph)
Traction system	Thyristor drive
Traction motors	MT54A MT54E
Electric system(s)	20 kV AC (50 Hz)
Current collector(s)	Overhead line
Bogies	DT38 (motored), TR208 (trailer)
Safety system(s)	ATS-SN, ATS-DN
Track gauge	1,067 mm (3 ft 6 in)

Fleet

By 1 October 2014, 36 vehicles (12 sets) were still in service, all based at Sapporo Depot.^[3]

Formations

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.^[4]

Car No.	1	2	3
Designation	Tc'	M	Tc
Numbering	KuHa 711-200	MoHa 711-100	KuHa 711-100

Car 2 was fitted with one N-PS785 single-arm pantograph.^[4]

Former prototype sets S901/902

The former prototype sets, S901 and S902 were formed as shown below.^[5]

Designation	Tc	Mc	Tc'
Numbering	KuHa 711-100	KuMoHa 711-900	KuHa 711-900

Interior

Seating consisted of a mixture of transverse seating bays and longitudinal bench seating.^[1]

• 
  Interior of KuHa 711-210 (set S-110) in October 2011
• 
  A four-person seating bay in KuHa 711-210 (set S-110) in October 2011

History

Prototype sets

Former prototype set S901 leading a 6-car formation at Sapporo, 1994

Two prototype two-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 four-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.^[6]

Full-production sets

The first full-production three-car sets were delivered from August 1968.^[1] A third, centre, door was added to some of the KuHa 711 cars from 1987.^[1] All cars became no-smoking from 1 July 1992.^[4] Priority seating was added from 1 October 1997.^[4] Air conditioning was added to the two-door sets between 2001 and 2002.^[4] The original scissors-type pantographs were replaced with N-PS785 single-arm pantographs between 2004 and 2005.^[4]

• 
  Set S107 in original livery in 1982
• 
  Set S-111 with three-door end cars, November 2009

Repainted sets

Repainted set S-114 in June 2012

In 2011, set S-110 was repainted into its original JNR all-over crimson livery, and this was followed in May 2012 by a second similarly repainted set, S-114.^[7]

Withdrawal

Withdrawn 711 series sets awaiting cutting up at Jinyamachi Rinkai Yard in Muroran, Hokkaido, in July 2015

The last remaining sets in service were withdrawn on 13 March 2015.^[2]

Preserved examples

As of July 2017^[update], three 711 series vehicles have been preserved, as follows.^[8]

• KuHa 711 29: Preserved in Chitose, Hokkaido, and used as the "Cafe Garden Station" restaurant
• KuHa 711 103 + KuHa 711 203: Preserved outside in Iwamizawa, Hokkaido

• 
  Preserved cars KuHa 711 103 + KuHa 711 203 in October 2015