E531 series

The E531 series (E531系) is an electric multiple unit (EMU) train type operated by East Japan Railway Company (JR East) in Japan.[1] It was introduced by JR East on 9 July 2005 to replace the aging 403 and 415 series EMUs running on the Jōban Line from Ueno Station in Tokyo. The stock is a dual-voltage (1,500 V DC & 20 kV AC) development of the DC-only E231 series suburban EMU design, and can run at speeds of up to 130 km/h (80 mph) in service.[2]

E531 series
An E531 series train on the Tōhoku Main Line in October 2017
In service2005–Present
ManufacturerTokyu Car Corporation, Kawasaki Heavy Industries, JR East, J-TREC
Replaced403 series, 415 series, some E501 series
Constructed2005–Present
Entered serviceJuly 2005
Number built410 vehicles
Number in service410 vehicles
Formation5/10 cars per trainset
Operator(s)JR East
Depot(s)Katsuta
Line(s) servedUeno-Tokyo Line, Jōban Line, Mito Line, Tohoku Main Line
Specifications
Car body constructionStainless steel
Car length20,000 mm (65 ft 7 in)
Width2,950 mm (9 ft 8 in)
Floor height1,130 mm (3 ft 8 in)
Doors4 pairs per side
Maximum speed130 km/h (80 mph)
Traction systemVariable frequency (IGBT-VVVF)
SiC-VVVF
Acceleration2.5 km/h/s
Deceleration4.2 km/h/s
Electric system(s)1,500 V DC & 20 kV AC (50 Hz)
Current collection methodPS37A single-arm pantograph
BogiesDT71 (motored)
TR255 (trailer)
Braking system(s)Regenerative brake
Safety system(s)ATS-SN, ATS-P, ATS-Ps
Track gauge1,067 mm (3 ft 6 in)

Operations

Trains are formed in 10-car (set numbers K-401 onward) and 5-car (set numbers K-451 onward) sets. 15-car formations are generally run between Ueno and Tsuchiura. 10- and 5-car sets operate singly north of Tsuchiura, and 5-car sets are used on the Mito Line.

Formations

The E531 series sets are formed as shown below with car 1 (11) at the Ueno end. All sets are based at Katsuta Depot.[3]

10-car sets

Sets K401–426 (26 sets):

Car No.12345678910
Designation Tc'M'MTsd'TsdT'M'MTTc
Numbering KuHa E530MoHa E530MoHa E531-1000SaRo E530SaRo E531SaHa E530-2000MoHa E530-2000MoHa E531-2000SaHa E531KuHa E531

Cars 3 and 8 have one single-arm pantograph each. Cars 1, 5, and 10 have toilets (universal access in cars 1 and 10). Car 9 is numbered in the SaHa E531-2000 series for sets K412 to 422 (cars originally used as cars 4 and 5 in sets K401 to 421).[3]

5-car sets

Sets K451–483 (33 sets):

Car No.1112131415
Designation Tc'M'MTTc
Numbering KuHa E530-2000MoHa E530-1000MoHa E531SaHa E531KuHa E531-1000

Car 13 has one single-arm pantograph. Car 11 has a toilet (universal access).[3]

Sets K551–557:[4]

Car No.1112131415
Designation Tc'M'MTTc
Numbering KuHa E530-5000MoHa E530-4000MoHa E531-3000SaHa E531-3000KuHa E531-4000

Original 10-car sets (July 2005 – March 2007)

The original 10-car sets delivered without bilevel Green cars were formed as follows.[5]

Sets K401–406
Car No.12345678910
Designation Tc'M'MTTT'M'MTTc
Numbering KuHa E530MoHa E530MoHa E531-1000SaHa E531-2000SaHa E531-2000SaHa E530-2000MoHa E530-2000MoHa E531-2000SaHa E531KuHa E531

Cars 3 and 8 had one single-arm pantograph each. Cars 1 and 10 had toilets (universal access).[5]

Sets K407–411
Car No.12345678910
Designation Tc'M'MT'T'T'M'MTTc
Numbering KuHa E530MoHa E530MoHa E531-1000SaHa E530-2000SaHa E530-2000SaHa E530-2000MoHa E530-2000MoHa E531-2000SaHa E531KuHa E531

Cars 3 and 8 had one single-arm pantograph each. Cars 1 and 10 had toilets (universal access).[5]

Interior
  • An ordinary-class car with longitudinal seating
  • An ordinary-class car with a mixture of longitudinal and transverse seating
  • The lower deck of bilevel Green car SaRo E531-15 in June 2017
  • The upper deck of bilevel Green car SaRo E531-15 in June 2017
  • A toilet

History

The first E531 series trains entered service on 9 July 2005.[6]

Pairs of double-deck "Green" (first class) cars were added to the 10-car sets from 6 January 2007, and all 10-car sets included Green cars by the start of the revised timetable on 18 March 2007.

In September 2014, an additional 10-car set, K423, was delivered from the J-TREC factory in Yokohama, four years after construction of the original fleet had ceased.[7] This was followed in December 2014 by a five-car set, K469, also delivered from J-TREC in Yokohama.[8]

Build details

The build details for the fleet as of 1 October 2014 are as shown below.[9]

10-car sets
Set No.ManufacturerDate deliveredGreen cars inserted
K401Tokyu Car16 March 200520 November 2006
K402Kawasaki Heavy Industries13 May 20054 December 2006
K403Tokyu Car19 May 200522 December 2006
K404Kawasaki Heavy Industries27 May 200519 January 2007
K405Kawasaki Heavy Industries17 June 200531 January 2007
K406Tokyu Car23 June 200515 February 2007
K407JR East, Niitsu8 March 200622 November 2006
K408JR East, Niitsu29 March 20066 December 2006
K409JR East, Niitsu21 April 200625 December 2006
K410JR East, Niitsu17 May 200626 March 2007
K411JR East, Niitsu9 June 20061 February 2007
K412JR East, Niitsu23 June 200623 November 2006
K413JR East, Niitsu4 July 200624 November 2006
K414JR East, Niitsu13 July 200613 December 2006
K415JR East, Niitsu22 July 200614 December 2006
K416JR East, Niitsu2 August 200627 December 2006
K417JR East, Niitsu12 August 200628 December 2006
K418JR East, Niitsu23 August 200624 January 2007
K419JR East, Niitsu1 September 200625 January 2007
K420JR East, Niitsu9 September 20065 February 2007
K421JR East, Niitsu20 September 20066 February 2007
K422JR East, Niitsu30 September 200619 February 2007
K423J-TREC, Yokohama3 October 2014(Included from new)
  • Note that many sets incorporate cars (cars 4, 5, 6 and 9) built by manufacturers other than those listed above due to reforming when Green cars were inserted between 2005 and 2006.[9]

5-car sets
Set No.ManufacturerDate delivered
K451Tokyu Car8 March 2005
K452Kawasaki Heavy Industries11 May 2005
K453Tokyu Car22 May 2005
K454Kawasaki Heavy Industries27 May 2005
K455Tokyu Car10 June 2005
K456Tokyu Car1 July 2005
K457JR East, Niitsu4 March 2006
K458JR East, Niitsu25 March 2006
K459JR East, Niitsu8 April 2006
K460JR East, Niitsu2 May 2006
K461JR East, Niitsu1 June 2006
K412JR East, Niitsu17 June 2006
K463JR East, Niitsu7 October 2006
K464JR East, Niitsu13 October 2006
K465JR East, Niitsu21 October 2006
K466JR East, Niitsu27 October 2006
K467JR East, Niitsu17 June 2010
K468JR East, Niitsu23 July 2010
K469J-TREC, YokohamaDecember 2014[8]
K470J-TREC, YokohamaJanuary 2015[10]
K471J-TREC, YokohamaJanuary 2015[10]
K551J-TREC, YokohamaOctober 2015[4]
K480J-TREC, Yokohama21 February 2020
K481J-TREC, Yokohama21 February 2020

References
  1. JR全車輌ハンドブック2009 [JR Rolling Stock Handbook 2009]. Japan: Neko Publishing. 2009. ISBN 978-4-7770-0836-0.
  2. "E531系一般形交直流電車の概要" [E531 series AC/DC EMU outline]. Railway Journal. 39 (465): 102. July 2005.
  3. JR電車編成表 2012冬 [JR EMU Formations - Winter 2012]. Japan: Kotsu Shimbunsha. October 2011. pp. 48–49. ISBN 978-4-330-25611-5.
  4. E531系K551編成が登場 [E531 series set K551 delivered]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 16 October 2015. Retrieved 16 October 2015.
  5. JR電車編成表 '07冬号 [JR EMU Formations - Winter 2007]. Japan: JRR. December 2006. p. 47. ISBN 978-4-88283-046-7.
  6. JR電車編成表 2012夏 [JR EMU Formations - Summer 2012]. Japan: Kotsu Shimbunsha. May 2012. p. 44. ISBN 978-4-330-28612-9.
  7. "常磐線E531系が4年ぶりに新造される" [New E531 series built for first time in 4 years]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 1 October 2014. Retrieved 1 October 2014.
  8. E531系K469編成総合車両製作所出場 [E531 series set K469 delivered from J-TREC]. RM News (in Japanese). Japan: Neko Publishing Co., Ltd. 19 December 2014. Retrieved 19 December 2014.
  9. JR電車編成表 2015冬 [JR EMU Formations - Winter 2015]. Japan: Kotsu Shimbunsha. 21 November 2014. pp. 46–47. ISBN 978-4-330-51614-1.
  10. E531系K470編成・K471編成が出場 [E531 series sets K470 and K471 delivered]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 28 January 2015. Retrieved 28 January 2015.

Further reading
  • 首都圏新系列車両 Profile: 209/E231/E233系グループの全貌 首都圏新系列車両PROFILE [Tokyo Area New-generation Rolling Stock Profile]. Japan: Ikaros Publishing. 15 April 2011. ISBN 978-4-86320-436-2.
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