121 series

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121 series
JNR 121 series 04.jpg
A pair of 121 series sets on the Yosan Line in May 2009
In service March 1987–
Manufacturer Hitachi, Kawasaki Heavy Industries, Kinki Sharyo, Tokyu Car Corporation
Constructed 1986-1987
Refurbishment 2016–
Number built 38 vehicles (19 sets)
Number in service 38 vehicles (19 sets)
Formation 2 cars per trainset
Operator(s) JNR (1987)
JR Shikoku (1987–)
Depot(s) Takamatsu
Line(s) served Dosan Line, Yosan Line
Specifications
Car body construction Stainless steel
Car length 20,000 mm (65 ft 7 in)
Width 2,800 mm (9 ft 2 in)
Height 3,670 mm (12 ft 0 in)
Floor height 1,180 mm (3 ft 10 in)
Doors 3 pairs per side
Maximum speed 100 km/h (60 mph)
Traction system MT55A traction motors
Power output 110 kW x 4
Acceleration 2 km/h/s
Electric system(s) 1,500 V DC overhead
Current collection method Overhead catenary
Bogies DT33A (motored)
DT12T (trailer)
Track gauge 1,067 mm (3 ft 6 in)

The 121 series (121系?) is an electric multiple unit (EMU) train type introduced in March 1987 by Japanese National Railways (JNR), and currently operated by Shikoku Railway Company (JR Shikoku) on local services in Shikoku, Japan.[1][2]

Design[edit]

The 121 series design is based on the earlier 105 series, with lightweight stainless steel bodies.[3]

The motor bogies were the same DT33A bogies as used on the JNR-era 103 series EMUs, and the trailer cars used DT21T bogies recovered from withdrawn 101 series EMUs.[4] The pantographs were also recovered from withdrawn 101 series EMUs.[4]

Operations[edit]

The sets are based at Takamatsu Depot and operate on the Yosan Line and Dosan Line in 2-, 4-, or 6-car formations.[2][5]

Formations[edit]

As of 1 April 2016, the fleet consists of 18 two-car 121 series sets and one 7200 series formed of one motored "Mc" car and one non-powered "Tc" trailer car as shown below with the motored "Mc" cars at the Takamatsu end.[5]

121 series[edit]

Designation Mc Tc
Numbering KuMoHa 121 KuHa 120
Weight (t) 42.0 28.0
Capacity (total/seated) 118/62 118/62

The "Mc" cars are each fitted with one S-PS58 lozenge-type pantograph.[5]

7200 series[edit]

Designation Mc Tc
Numbering KuMoHa 7200 KuHa 7300
Weight (t) 37.6 28.5
Capacity (total/seated) 132/52 132/52

The "Mc" cars are each fitted with one S-PS58 lozenge-type pantograph.[6]

Interiors[edit]

Seating is arranged as a mix of transverse seating bays and longitudinal bench seats.[2] The sets are not equipped with toilets.[5]

History[edit]

The 121 series sets were introduced on 23 March 1987, just nine days before JNR was privatized on 1 April, following which the 121 series fleet came under control of JR Shikoku.[4] The sets were originally delivered with magenta "Red No. 20" bodyside stripes, but were repainted with JR Shikoku corporate light blue ("Blue No. 26") bodyside stripes during September and October 1987.[2]

In 1992, the original pantographs were replaced with the same S-PS58 type pantographs also used on the JR Shikoku 7000 series EMUs to ensure adequate clearance through tunnels on newly electrified sections of the Yosan Line.[4]

In 2011, two sets (numbers 001 and 002) were modified for wanman driver only operation. These sets were repainted with their original JNR-style magenta bodyside stripes.[5]

Refurbishment and conversion[edit]

7200 series set R03 in June 2016

From 2016, the entire fleet of 19 two-car trainsets is scheduled to undergo refurbishment, and at the same time reclassified "7200 series". Refurbishment includes replacement of the DC motors with 140 kW AC motors and VVVF control, new side windows, new "efWing" CFRP bogies (S-DT67ef motor bogies and S-TR67ef trailer bogies), and a new livery based on the original style with a thin green line added to the magenta bodyside stripe.[6] Internally, the refurbished trains have fixed four-person seating bays on one side with longitudinal bench seating on the other.[6]

The first trainset to be treated, set 3, was outshopped from JR Shikoku's Tadotsu Works in February 2016,[7] and entered service from 13 June 2016.[8]

Fleet history[edit]

The individual build histories for the fleet are as follows.[4]


Set No. Manufacturer Date delivered 7200 series conversion date
001 Hitachi 17 November 1986
002 Kinki Sharyo 20 November 1986
003 Kawasaki Heavy Industries 13 December 1986 March 2016
004 Kawasaki Heavy Industries 13 December 1986
005 Kinki Sharyo 27 December 1986
006 Kinki Sharyo 27 December 1986
007 Kinki Sharyo 27 December 1986
008 Tokyu Car 27 January 1987
009 Tokyu Car 27 January 1987
010 Tokyu Car 27 January 1987
011 Tokyu Car 27 January 1987
012 Hitachi 13 January 1987
013 Hitachi 27 January 1987
014 Hitachi 27 January 1987
015 Kawasaki Heavy Industries 16 January 1987
016 Kawasaki Heavy Industries 16 January 1987
017 Kawasaki Heavy Industries 16 January 1987
018 Kinki Sharyo 20 January 1987
019 Kinki Sharyo 20 January 1987

References[edit]

  1. ^ Haraguchi, Takayuki (2009). Encyclopedia of JR's Railway Cars: JR全車輌. Japan: Sekai Bunka. p. 75. ISBN 978-4-418-09905-4. 
  2. ^ a b c d JR全車輌ハンドブック2009 [JR Rolling Stock Handbook 2009]. Japan: Neko Publishing. 2009. p. 256. ISBN 978-4-7770-0836-0. 
  3. ^ Fukuhara, Shunichi (August 2016). 121系近郊形直流電車のあゆみ part1 [The history of the 121 series suburban DC EMU trains (part 1)]. Japan Railfan Magazine (in Japanese). Vol. 56 no. 664 (Japan: Koyusha Co., Ltd.). p. 84-87. 
  4. ^ a b c d e Fukuhara, Shunichi (September 2016). 121系近郊形直流電車のあゆみ part2 [The history of the 121 series suburban DC EMU trains (part 2)]. Japan Railfan Magazine (in Japanese). Vol. 56 no. 665 (Japan: Koyusha Co., Ltd.). p. 94-99. 
  5. ^ a b c d e JR電車編成表 2016夏 [JR EMU Formations - Summer 2016] (in Japanese). Japan: Kotsu Shimbunsha. 20 May 2016. p. 205. ISBN 978-4-330-68216-7. 
  6. ^ a b c Yoshimoto, Eizaburo (August 2016). 7200系近郊形直流電車 [7200 series suburban DC EMU trains]. Japan Railfan Magazine (in Japanese). Vol. 56 no. 664 (Japan: Koyusha Co., Ltd.). p. 84-87. 
  7. ^ JR四国121系第3編成が7200系となり出場 [JR Shikoku 121 series set 3 outshopped as 7200 series]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 3 February 2016. Retrieved 12 May 2016. 
  8. ^ JR四国7200系が営業運転を開始 [JR Shikoku 7200 series enters revenue service]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 14 June 2016. Retrieved 14 June 2016.