Keikyu N1000 series


The Keikyu N1000 series is a DC electric multiple unit train type operated by the private railway operator Keikyu on commuter services in the Tokyo area of Japan since 2002.

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 and from the Toei Asakusa Line, Keisei Oshiage Line, Keisei Main Line, and Hokuso Line.Some of these eight cars sets are also being used on the Keikyu Airport Line. Four-car sets are used to form 12-car "Rapid Limited Express" and "Limited Express" services, and are also used singly on all-stations "Local" services. 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.
When Keikyu N1000 series that use SiC-VVVF system entered service, Toei banned those trains running through service due to unknown reasons. But it seems like this ban has cleared, when Keikyu N1000 set 1225F was first seen at Keisei-Takasago Station.

Variants

Since the first set was introduced in March 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 have unpainted stainless steel bodies. More detailed variations are described below.

Batch 1

Delivered February to June 2002.
These sets had single-arm pantographs and roller-blind destination indicators and originally used Siemens GTO variable-frequency drive. Eight-car set 1001 was refurbished in September 2017. Refurbishment includes the addition of LED headlights, modifications to some of the passenger side windows to allow them to be opened. Additionally, set 1001 had its original Siemens GTO-VVVF replaced with Mitsubishi SiC-VVVF inverters. In December 2017, eight-car set 1017 was upgraded with LED lights and LCD-screens above the doors. The electrical systems were later replaced with Toyo Denki IGBT-VVVF inverters, which is also used on the Keikyu 2100 series. Set 1009 was refurbished like set 1001 between late 2018 and early 2019 and received Toyo Denki IGBT.

Batch 2

Delivered May to July 2003.
The centre pillars of the passenger windows were discontinued. Set 1409 was upgraded in May 2018, and modifications included LED lights, LCD-displays above the doors, LED-displays on the sides, and replacement of the original GTO-VVVF propulsion systems with IGBT inverters supplied by Toshiba, which is also used on sets 1401 and 1405 from the earlier batch. Set 1413 was also upgraded like set 1409 and started service in December 2018. Set 1025 was refurbished in May and August 2019, and the original Siemens GTO was changed to Toyo Denki IGBT. Set 1033 is currently the only train left with Siemens GTO.

Batch 3

Delivered January to March 2005.
Feature IGBT variable-frequency drive. Set 1417 was refurbished in March 2019. This set now has LED lighting, LCD-displays above the doors, LED-displays and Toyo Denki IGBT.

Batch 4

Delivered July to August 2005.
Feature full-colour LED destination indicators.

Batch 5

Delivered November 2006.
No design changes over 4th batch vehicles.

Batch 6

Delivered March 2007.
Use Mitsubishi inverters. Body design changed to unpainted stainless steel. The four-seat transverse bays at the ends of cars were replaced by longitudinal bench seats.

Batch 7

Delivered January to February 2008.
Yellow warning tape was added around the door interiors.

Batch 8

Delivered September to December 2008.
Delivered April to June 2009.
Delivered during fiscal 2010.
Audible warnings added for door opening/closing, and pairs of LCD passenger information screens installed above doors.
In addition, 1137 was retired on March 2020 in the aftermath of the level crossing crash in September 5th 2019.

Batch 11

Delivered during fiscal 2011.
The third six-car set, 1313, entered service on 19 March 2012. This set uses LED interior lighting instead of fluorescent tubes.

Batch 12

Delivered April 2012.
Delivered August 2013 to March 2014.
Delivered in mid to late 2014.
Delivered in 2015.
Set 1367 uses Toshiba PMSM-VVVF.

1000-1800 series

Two new 1000-1800 series four-car sets 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. These two sets entered revenue service on 4 March 2016. In mid 2016, set 1809 was delivered along with Batch 16.

Batch 16

Introduced in fiscal 2016.
Introduced in fiscal 2017. These sets have stainless steel bodies painted in a red and ivory livery instead of the vinyl-based livery used on earlier batches. Internally, pairs of LCD passenger information screens are provided above each set of doors.
Introduced in fiscal 2018.

8-car sets 1001 to 1033

The five eight-car sets 1001 to 1033 are formed as follows, with four motored cars and four trailer cars.
DesignationMucTpuTuMuMsTsTpsMsc
Numbering1xxx1xxx1xxx1xxx1xxx1xxx1xxx1xxx

The "Tpu" and "Tps" cars are each fitted with two single-arm pantographs.

8-car sets 1041 to 1065

The five eight-car sets 1041 to 1065 are formed as follows, with six motored cars and two trailer cars.
DesignationMucTpuM2uM1uM1sM2sTpsMsc
Numbering1xxx1xxx1xxx1xxx1xxx1xxx1xxx1xxx

The "Tpu" and "Tps" cars are each fitted with two single-arm pantographs.

8-car sets 1073 to 1169

The ten eight-car sets 1073 to 1145 are formed as follows, with six motored cars and two trailer cars.
DesignationM2ucM1uTuM1u'M2sTsM1sM2sc
Numbering1xxx1xxx1xxx1xxx1xxx1xxx1xxx1xxx

The "M1u" and "M1s" cars are each fitted with two single-arm pantographs, and the "M1u'" are fitted with one pantograph.

6-car sets 1301 to 1367 and 1601 to 1667

The three six-car sets 1301 to 1313 are formed as follows, with four motored cars and two trailer cars.
DesignationM2ucM1uTuTsM1sM2sc
Numbering13xx13xx13xx13xx13xx13xx

The "M1u" and "M1s" cars are each fitted with two single-arm pantographs.

4-car sets 1401 to 1405

The two four-car sets 1401 to 1405 are formed as follows, with two motored cars and two trailer cars.
DesignationMuc1Tpu1Tps1Msc1
Numbering14xx14xx14xx14xx

The "Tpu1" and "Tps1" cars are each fitted with one single-arm pantograph.

4-car sets 1409 to 1413

The two four-car sets 1409 to 1413 are formed as follows, with two motored cars and two trailer cars.
DesignationMuc1TTpMsc1
Numbering14xx14xx14xx14xx

The "Tp" cars are fitted with two single-arm pantographs.

4-car sets 1417 to 1445

The eight four-car sets 1417 to 1445 are formed as follows, with three motored cars and one trailer car.
DesignationMuc1M2TpMsc1
Numbering14xx14xx14xx14xx

The "Tp" cars are fitted with two single-arm pantographs.

4-car sets 1449 to 1489

The eleven four-car sets 1449 to 1489 are formed as follows, with four motored cars.
DesignationM2ucM1uM1sM2sc
Numbering14xx14xx14xx14xx

The "M1u" and "M1s" cars are each fitted with one single-arm pantograph.

Livery variations

8-car set 1057 was repainted into a special "Yellow Happy Train" livery from May 2014.

Accidents

A N1000 series train, was involved in a collision with a truck on a level crossing near Kanagawa-shimmachi Station on 5 September 2019.
This set was damaged beyond repair and was removed and scrapped in March 2020.