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121 series

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121 series
A pair of 121 series sets on the Yosan Line in May 2009
In serviceMarch 1987–
ManufacturerHitachi, Kawasaki Heavy Industries, Kinki Sharyo, Tokyu Car Corporation
Constructed1986-1987
Refurbished2016–
Number built38 vehicles (19 sets)
Number in service38 vehicles (19 sets)
Formation2 cars per trainset
OperatorsJNR (1987)
JR Shikoku (1987–)
DepotsTakamatsu
Lines servedDosan Line, Yosan Line
Specifications
Car body constructionStainless steel
Car length20,000 mm (65 ft 7 in)
Width2,800 mm (9 ft 2 in)
Height3,670 mm (12 ft 0 in)
Floor height1,180 mm (3 ft 10 in)
Doors3 pairs per side
Maximum speed100 km/h (60 mph)*
Traction systemMT55A traction motors
Power output110 kW x 4
Acceleration2 km/h/s
Electric system(s)1,500 V DC overhead
Current collector(s)Overhead catenary
BogiesDT33A (motored)
DT12T (trailer)
Track gauge1,067 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

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the same DT33A bogies as used on the JNR-era 103 series EMUs, and the trailer cars used DT21T bogies recovered from withdrawn 101 series EMUs.[4] The pantographs were also recovered from withdrawn 101 series EMUs.[4]

  • A DT21T trailer bogie
    A DT21T trailer bogie

Operations

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

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

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]

  • KuMoHa 121-14 in December 2007
    KuMoHa 121-14 in December 2007
  • KuHa 120-14 in December 2007
    KuHa 120-14 in December 2007

7200 series

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

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

  • An interior view in September 2007
    An interior view in September 2007

History

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]

  • 121 series sets in original JNR livery, circa 1987
    121 series sets in original JNR livery, circa 1987
  • Set 009 with a front-end red warning stripe added for a short period during the 1990s
    Set 009 with a front-end red warning stripe added for a short period during the 1990s
  • A pair of 121 series sets in May 2009
    A pair of 121 series sets in May 2009
  • Modified driver-only set 001 in April 2012
    Modified driver-only set 001 in April 2012

Refurbishment and conversion

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]

  • An S-DT67ef motor bogie on car KuMoHa 7203
    An S-DT67ef motor bogie on car KuMoHa 7203
  • An S-TR67ef trailer bogie on car KuHa 7303
    An S-TR67ef trailer bogie on car KuHa 7303
  • 7200 series sets R04+R03 in October 2016
    7200 series sets R04+R03 in October 2016

Fleet history

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

Wikimedia Commons has media related to 121 series.
  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. Japan: Neko Publishing. 2009. p. 256. ISBN 978-4-7770-0836-0. {{cite book}}: Unknown parameter |trans_title= ignored (|trans-title= suggested) (help)
  3. ^ Fukuhara, Shunichi (August 2016). 121系近郊形直流電車のあゆみ　part1. Japan Railfan Magazine (in Japanese). Vol. 56, no. 664. Japan: Koyusha Co., Ltd. p. 84-87. {{cite magazine}}: Unknown parameter |trans_title= ignored (|trans-title= suggested) (help)
  4. ^ a b c d e Fukuhara, Shunichi (September 2016). 121系近郊形直流電車のあゆみ　part2. Japan Railfan Magazine (in Japanese). Vol. 56, no. 665. Japan: Koyusha Co., Ltd. p. 94-99. {{cite magazine}}: Unknown parameter |trans_title= ignored (|trans-title= suggested) (help)
  5. ^ a b c d e JR電車編成表 2016夏 (in Japanese). Japan: Kotsu Shimbunsha. 20 May 2016. p. 205. ISBN 978-4-330-68216-7. {{cite book}}: Unknown parameter |trans_title= ignored (|trans-title= suggested) (help)
  6. ^ a b c Yoshimoto, Eizaburo (August 2016). 7200系近郊形直流電車. Japan Railfan Magazine (in Japanese). Vol. 56, no. 664. Japan: Koyusha Co., Ltd. p. 84-87. {{cite magazine}}: Unknown parameter |trans_title= ignored (|trans-title= suggested) (help)
  7. ^ JR四国121系第3編成が7200系となり出場. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 3 February 2016. Retrieved 12 May 2016. {{cite web}}: Unknown parameter |trans_title= ignored (|trans-title= suggested) (help)
  8. ^ JR四国7200系が営業運転を開始. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 14 June 2016. Retrieved 14 June 2016. {{cite web}}: Unknown parameter |trans_title= ignored (|trans-title= suggested) (help)
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