Tokyu 8500 series

The Tokyu 8500 series (東急8500系, Tōkyū 8500-kei) is a commuter electric multiple unit (EMU) train type operated by the private railway operator Tokyu Corporation on the Tokyu Den-en-toshi Line and Tokyu Oimachi Line in the Tokyo area of Japan since 1975.[1]

Tokyu 8500 series
8500 series set 8606 near Tana Station in September 2017
In service	1975–present
Manufacturer	Tokyu Car Corporation
Constructed	1975–1991
Number built	400 vehicles
Number in service	230 vehicles (as of September 2019)
Formation	5/10 cars per trainset (Tokyu) 8/12 cars per trainset (KCI)
Operator(s)	Tokyu Corporation Kereta Commuter Indonesia (KCI) (2006–present)
Depot(s)	Nagatsuta (Japan) Bukit Duri (Indonesia)
Line(s) served	Tokyu Den-en-toshi Line, Tokyu Oimachi Line, Tokyo Metro Hanzomon Line, Tobu Isesaki Line, Tōbu Nikkō Line, Tobu Skytree Line
Specifications
Car body construction	Stainless steel
Car length	20,000 mm (65 ft 7 ^3⁄8 in)
Doors	4 pairs per side
Maximum speed	Service: 110 km/h (70 mph) Design: 120 km/h (75 mph)
Traction system	Chopper Hitachi MMC-HTR-20 + TKM-69/80 130kW traction system
Transmission	Motor Generator (MG) (8604F) Static Inverter (SIV)
Acceleration	3.3 km/(h⋅s) (2.1 mph/s)
Deceleration	3.5 km/(h⋅s) (2.2 mph/s) 4.5 km/(h⋅s) (2.8 mph/s) (Emergency)
Electric system(s)	1,500 V DC Overhead line
Current collection method	Pantograph
Bogies	TS-807A, TS-815C with air springs
Braking system(s)	Regenerative Braking Combination All Electric Command Solenoid Direct Air Damping (HRD-2)
Safety system(s)	Tokyu ATS, ATC-P, Deadman Pedal
Coupling system	AAR coupling
Track gauge	1,067 mm (3 ft 6 in)

Design

First introduced in 1975, the design is based on the earlier 8000 series design.[2] A total of 400 vehicles were built by 1991.[1]

History

First put into service in 1975, the Tokyu 8500 series was a recipient of the 1976 Laurel Prize. These trains have been slowly retiring and are being replaced by newer trains such as the Tokyu 5000 series and the Tokyu 2020 series.

Operations

The 10-car trainsets are primarily used on inter-running services on the Tokyu Den-en-toshi Line, Tokyo Metro Hanzomon Line, Tobu Skytree Line, Tobu Isesaki Line as far as Kuki, and the Tobu Nikko Line as far as Minami-Kurihashi.[3] The five-car sets are used on Tokyu Oimachi Line services and have been retired in 2019.[3]

Formations

Den-en-toshi Line 10-car sets

As of June 2020, the fleet consists of 14 ten-car sets, based at Nagatsuta Depot, and formed as shown below with eight motored ("M") cars and two non-powered trailer ("T") cars, and car 1 at the Shibuya end.[3] Most of the original train sets have either retired or resold to other operators.

Car No.	1	2	3	4	5	6	7	8	9	10
Designation	M2c	M1	T	M2	M1	M2	M1	T	M2	M1c
Numbering	DeHa 8600	DeHa 8700	SaHa 8900	DeHa 8800	DeHa 8700	DeHa 8800	DeHa 8700	SaHa 8900	DeHa 8800	DeHa 8500

• Cars 2, 5, 7, and 10 are each fitted with one lozenge-type pantograph.[3]
• Cars 3 and 9 have a wheelchair space.[3]
• Car 2 is designated as a mildly air-conditioned car.[3]

Den-en-toshi Line sets 8601 to 8614 were marked with "K" stickers on the center front window of the driving cab ends, and they were restricted to operating on Den-en-toshi Line and Tokyo Metro Hanzōmon Line only, due to lack of Tobu ATS on these sets. After the opening of the Hanzōmon Line extension from Suitengūmae Station to Oshiage Station, sets 8601, 8602, 8613, and 8614 were fitted with Tobu ATS, allowing them to operate on Tobu Skytree Line, Tobu Isesaki Line and Tōbu Nikkō Line (and had their "K" stickers removed), while sets 8603 to 8612 were retained without Tobu ATS until their retirement from duties on the Den-en-toshi Line.

All trains with "K" stickers have had their ATS system installed or withdrawn from service. The last train with the K sticker, set 8606, was retired in May 2020. With the withdrawal of set 8614 (which retains the Izu no Natsu livery) in June 2020, only 14 sets of 8500 Series remain in service with Tokyu.

Oimachi Line 5-car sets

Ōimachi Line 5-car set, October 2006

As of 1 April 2014, the fleet consists of four five-car sets, based at Nagatsuta Depot, and formed as shown below with four motored ("M") cars and one non-powered trailer ("T") car, and car 1 at the Oimachi end.[3] All of these have been withdrawn from service starting from April 2019.

Car No.	1	2	3	4	5
Designation	M2c	M1	T	M2	M1c
Numbering	DeHa 8600	DeHa 8700	SaHa 8900	DeHa 8800	DeHa 8500

• Cars 2 and 5 are each fitted with one single-arm pantograph.[3]
• Car 2 is designated as a mildly air-conditioned car.[3]

Interior

• 
  Early style interior of a Den-en-toshi Line set, February 2007
• 
  Refurbished interior of a Den-en-toshi Line set, February 2007
• 
  Late style interior of a Den-en-toshi Line set
• 
  LED passenger information display

Livery variations

• 
  Blue stripe livery, June 2007
• 
  Izu no Natsu Izu Kyuko style livery, August 2012
• 
  "TOQ-BOX" livery, June 2007

Resale

A number of 8500 series trains have been resold to other operators in Japan and overseas following their withdrawal from Tōkyū services.

Nagano Electric Railway

Nagano Electric Railway 8500 series 3-car set

Six 3-car sets were sold to the Nagano Electric Railway between 2005 and 2009. These retain the "8500 series" classification.[2]

Formation

1. DeHa 8500 (M1c)
2. SaHa 8550 (T)
3. DeHa 8510 (M2c)

Izukyū Corporation

One 8500 series car (DeHa 8723) was sold to Izukyū Corporation in 2006, becoming KuMoHa 8152, and combined with former Tokyu 8000 series cars. It includes transverse seating acquired from Seibu 10000 series trains during refurbishment.[2]

Chichibu Railway

Chichibu Railway 7000 series EMU converted from former Tokyu 8500 series, May 2009

Two 3-car 7000 series sets were formed from cars of set 8609, entering service on the Chichibu Railway in 2009.[2]

Indonesia

Former Tokyu 8500 series EMU set 8613 on a KRL Jabotabek commuter service in Jakarta, November 2011

Former Tokyu Den-en-toshi Line 8500 series set 8610 in an afternoon commuter service in Indonesia, September 2016. Although it was bought by Kereta Api Indonesia via Jabotabek Urban Transportation Division (Divisi Angkutan Perkotaan Jabotabek) in 2007, the color scheme was changed to KA Commuter Jabodetabek (subsidiary of Kereta Api Indonesia) red and yellow scheme.

Eight 8-car sets (8604, 8607, 8608, 8610, 8611, 8612, 8613, and 8618) were sold to KRL Jabodetabek in Indonesia between 2006 and 2009 for use on commuter services in the Jakarta area.[2][4] The sets initially received different color schemes, but were later standardized with the same KA Commuter Jabodetabek red and yellow livery.[5] Unfortunately, set 8612 was retired due to an accident in 2019. [6]

References

1. 私鉄車両年鑑2013 [Japan Private Railways Annual 2013]. Tokyo, Japan: Ikaros Publications Ltd. 20 March 2013. p. 182. ISBN 978-4-86320-693-9.
2. "東急８５００系と田園都市線のあゆみ" [Tokyu 8500 series and the History of the Denentoshi Line]. Tetsudō Daiya Jōhō. 38 (301): 12–21. May 2009.
3. 私鉄車両編成表 2014 [Private Railway Rolling Stock Formations - 2014]. Japan: Kotsu Shimbunsha. 24 July 2014. pp. 61–64. ISBN 978-4-330-48414-3.
4. "インドネシアで活躍する日本の電車２００９ (Japanese EMUs active in Indonesia 2009)". The Railway Pictorial. 59 (824): 102–107. October 2009.
5. "Warna-warni Rangkaian KRL AC Jabodetabek Dari Masa ke Masa" [The Colorful Jabodetabek EMU from Time to Time] (in Indonesian). Indonesia: Kaori Nusantara. 21 October 2015. Retrieved 14 September 2016.
6. Bhwana, Petir Garda (10 March 2019). "KRL Train Derailed After Being Hit by Huge Electric Pole". Tempo. Retrieved 6 July 2020.