The is a DC electric multiple unit (EMU) train type operated by the private railway operator Keikyu on commuter services in the Tokyo area of Japan since 2002.Keikyu N1000 series . Retrieved 17 September 2008.
Overview The N1000 series fleet first entered revenue service on 15 April 2002 as a successor to all remaining original 1000 series sets. The type garnered its designation as New 1000 series, frequently shortened to N1000 series, to distinguish it from the original 1000 series, which remained in service until 2010. Since then, "1000 series" has seen increasing use to refer to the N1000 series.
The N1000 series is Keikyu's most numerous train type, with 506 vehicles having been built , surpassing Keikyu's next-most numerous train type, the original 1000 series, by 150 vehicles. In March 2022, the type comprised approximately 60% of Keikyu's nearly 800-vehicle fleet.
Operations The eight-car sets are primarily used on limited-stop "Rapid Limited Express" and "Limited Express" services on the Keikyu Main Line, including through-running services to the Toei Asakusa Line as well as the Keisei Oshiage Line, Keisei Main Line, Narita Sky Access Line, and Hokuso Line. Some of these eight-car sets are also used on the Keikyu Airport Line. Four-car sets are commonly used to form 12-car "Rapid Limited Express" and "Limited Express" services, and are also used singly on all-stations "Local" services, with occasional use on the Keikyu Daishi Line. The six-car formations delivered from 2011 are generally used on all-stations "Local" services. The N1000 series sets can be used in multiple with other Keikyu EMU types, including the 600 series, 1500 series, 2000 series, and 2100 series.
Variants Since the first set was introduced in 2002, the type has undergone a number of design improvements. Sets built from 2002 to 2006 have painted aluminium bodies, whereas sets built from 2007 onward (sets 1073 onward) have stainless steel bodies. More detailed variations are described below.
Batches 1–5
These are four- and eight-car sets manufactured by Tokyu Car Corporation and Kawasaki Heavy Industries between 2002 and 2006.
Design Largely based on the design of the 2100 series, the N1000 series trains incorporate several differences due to the services on which they are used. These include the use of three passenger doors per side per car (as opposed to the 2100 series' two), and a commuter-oriented interior configuration.
A second batch of N1000 series sets was introduced from mid-2003, consisting of eight-car sets 1025 and 1033, and four-car sets 1409 and 1413. With the first batch of sets, four- and eight-car sets could be rearranged to form six-car trains, but this possibility was removed with this batch's four-car sets. The four-car sets also featured minor technical changes, with pantographs and power supplies being consolidated to the third car; in contrast, the first batch's four-car sets were fitted with a pantograph and power supply for each intermediate car.
Batch 3 (eight-car sets 1041 and 1049 and four-car sets 1417 and 1421), delivered in early 2005, was built with a motor car-to-trailer car ratio of 3:1 (compared to 1:1 for older sets), as well as other modifications for updated fire regulation compliance and weight reduction. Batches 4 (eight-car set 1057 and four-car sets 1425–1437) and 5 (eight-car set 1065 and four-car sets 1441 and 1445) were built with full-colour LED destination displays in place of the original roller-blind displays. Interior The interior incorporates a warm colour palette. Passenger accommodation consists primarily of longitudinal bucket-style seating, with transverse seating bays at car ends. Priority seating is also provided. When compared to the original 1000 series fleet, the N1000 series sets feature several accessibility improvements, such as audible door warnings, onboard passenger information displays, wheelchair spaces, and anti-slip flooring.
Beginning in 2010, priority seats were given blue moquette.
Specifications The first two N1000 series batches were fitted with Siemens SIBAS32 GTO thyristor-based variable-voltage/variable-frequency (VVVF) propulsion systems, like the preceding 2100 series fleet. These systems garnered the nickname due to the distinctive ascending musical scale they produced when accelerating from a standstill. Keikyu began replacing these traction systems in 2010 with systems from domestic suppliers. Eight-car set 1033 was the last set operating with these traction systems, making its final run with its original equipment on 20 July 2021.
Batches 3–5 were fitted with IGBT (insulated-gate bipolar transistor)-based traction systems, also supplied by Siemens. These traction systems' control units were lighter and smaller than those used in earlier sets. Batch 3 also introduced lighter TH-2100BM/TH-2100BT bogies, which lacked amenities from the original TH-2100AM/TH-2100AT design such as sandboxes and yaw dampers.
Build histories +8-car setsSet No.ManufacturerDate deliveredBatch1001Tokyu Car23 February 20021100928 June 20021017Kawasaki HI31 May 20021025Tokyu Car 19 May 200321033Kawasaki HI24 June 20031041Tokyu Car19 January 200531049Kawasaki HI1 March 20051057Tokyu Car30 August 20054106530 October 20065 +4-car setsSet No.ManufacturerDate deliveredBatch1401Kawasaki HI29 June 2002114051409Tokyu Car3 July 200321413Kawasaki HI1417Tokyu Car11 March 200531421Kawaski HI1425Tokyu Car26 July 200541429Kawasaki HI14339 August 20051437144114 November 200651445
Batches 6–15
These are four-, six-, and eight-car sets manufactured by Tokyu Car Corporation (J-TREC from 2012) and Kawasaki Heavy Industries between 2007 and 2015.
External and technical changes
These sets were built with significant bodywork and system updates over previous batches, some of which would be firsts for the N1000 series and Keikyu's history. These changes include the use of stainless steel bodies with film wrapping used for body colouring (earlier sets used painted aluminium); the discontinuation of front-end wiper covers; and domestically supplied traction systems from Mitsubishi, Toyo Denki, and Toshiba. The new bodies are approximately narrower than their aluminium-bodied counterparts. Four-car sets were built with motor cars throughout whilst eight-car sets preserved the motor car-to-trailer car ratio of 3:1.
Batch 10 introduced improved front-end emergency exits and onboard train management systems.
The sets have garnered the nickname (, ) for their red and silver colouring.
Internal changes From batch 6, the transverse seat bays at the ends of cars were replaced with longitudinal bench seats, the seat partitions were recoloured beige, and the driver's position was raised by . Batch 7 introduced yellow warning tape around the door interiors; batch 10 introduced visual door warnings and LCD information displays; and batch 11 introduced internal LED lighting (set 1313 only), following trials with older trainsets from December 2009.
Build histories +8-car setsSet No.ManufacturerDate deliveredBatch1073Tokyu Car14 March 20076108121 January 2008710898 February 20081097 27 October 20088110517 November 2008111315 December 2008112110 May 2010 1011292 June 2010113721 June 2010114510 January 2012111153J-TREC6 April 201212116127 August 201313116924 June 201414
+6-car setsSet No.ManufacturerDate deliveredBatch1301Kawasaki HI15 April 201111130722 April 201113133 March 2012131917 April 201212132524 April 201213317 January 20141313377 March 2014134322 April 201414134922 May 201413558 August 201413619 April 20151513679 December 2015 +4-car setsSet No.ManufacturerDate deliveredBatch1449Kawasaki HI22 September 20088145314571 April 20099146114653 April 20091469147322 May 2009147714814 June 20091485148917 March 201110
1000-1800 series
Two new series four-car sets (1801 and 1805) were delivered from J-TREC in February 2016. These two sets differ from earlier variants in having centre gangways on the cab ends as well as a vinyl-based red and ivory livery. The centre gangways allow the sets to form eight-car trains for use on through services to the Asakusa Line and Keisei lines. These two sets entered revenue service on 4 March 2016.
A third set, 1809, was delivered ahead of the 16th batch on 30 September 2016.
Batches 16–19
These are six- and eight-car sets manufactured by J-TREC and Kawasaki Heavy Industries between 2016 and 2019.
External changes While they inherit the stainless-steel bodies used with the N1000 series fleet since 2007, the 16th-batch sets carry a film-wrapped livery akin to that of the 1000-1800 series sets. For the 17th batch of sets, film-wrapped liveries were discontinued in favour of painted liveries. Keikyu states that these sets are the first privately operated, stainless steel-bodied sets to incorporate full-surface painting on a large scale in the Kanto region.
LED lighting is used throughout, and the 16th-batch sets are Keikyu's first to use LED headlights from new.
Internal changes
These batches incorporate a combination of longitudinal and transverse seating. Each car has two bays of transverse seating, one at each end. The longitudinal seat partitions were enlarged to reduce wind gusts and interference between seated and standing occupants. Also provided are power outlets and LCD information displays, some of which support Japanese and English, and others that support Korean and simplified Chinese.
Technical changes Beginning with batch 16, eight-car sets use Mitsubishi-developed full SiC (silicon carbide)-based traction systems with fully enclosed motors uprated to , compared to in earlier sets.
Build histories +8-car setsSet No.ManufacturerDate deliveredBatch1177J-TREC22 December 201616118521 February 2017120120171712092018121729 March 201812252 September 201919
+6-car setsSet No.ManufacturerDate deliveredBatch1601Kawasaki HI7 November 201616160729 November 201616135 January 20181716195 February 2018162510 October 20181816318 June 2018163718 June 20181643J-TREC8 August 20181649Kawasaki HI25 December 20181655J-TREC26 February 2019166119 March 20191667Kawasaki HI201919
1000-1890 series "Le Ciel" (batches 20 and 21)
The series four-car sets were manufactured from 2021. Due to replace older 1500 series trainsets, the first two sets were introduced into service from 6 May 2021 as part of batch 20. These are the first trains in the fleet to feature rotating banks of seats; they can be arranged in a longitudinal or transverse seating configuration when required. The seats are similar to those used on the 2100 series but are wider. Power sockets are also provided. They are also the first trainsets in the fleet to feature toilets; car 2 features a universal-access Western toilet, and car 3 features a men's toilet. The trains are intended for use on reserved seat "Wing" services as well as chartered event services.
Following their initial entry into service, Keikyu procured three additional 4-car sets as part of its investment plan for fiscal 2021: 1893–1895.
Following a nickname contest for the 1000-1890 series fleet held between June and July 2021, the nickname "Le Ciel" (The Sky in French) was announced for the 1000-1890 series fleet on 24 December. Four entries were given honourable mentions: "Red Rabbit", "Leap", "Sunsun", and "Kofu". From 26 March 2022, the intermediate cars of sets 1891, 1892, 1894, and 1895 were adorned with branding.
On 26 May 2022, the 1000-1890 series received the Blue Ribbon Award. Set 1893 was adorned with branding commemorating the award.
4-car sets x5: 1891, 1892, 1893, 1894, 1895
Batches 22–24
Keikyu announced the 22nd N1000 series batch as part of its investment plan for fiscal 2023, consisting of one 8-car set and one 6-car set. The first set, 6-car set 1501, was delivered from the Kawasaki Railcar Manufacturing plant on 28 July 2023 and entered service on 7 September.