Difference between revisions of "Kawasaki Heavy Industries & Nippon Sharyo 751B"

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'''Kawasaki Heavy Industries''' & '''Nippon Sharyo C751B cars''' are part of the newest rolling stock used in Singapore's original Mass Rapid Transit (MRT) network, operating on the North South MRT Line and the East West MRT Line since early 2000. 21 trainsets of 6 cars each were purchased, and it is the first rolling stock to feature VVVF Insulated Gate Bipolar Transistor traction control system. Kawasaki Heavy Industries Rolling Stock Company manufactured 66 cars and Nippon Sharyo manufactured 60 cars respectively with no comparable differences, having built to agreed specifications.
{{Infobox/Train
==Specifications==
|Name=Kawasaki Heavy Industries & Nippon Sharyo 751B
[[Image:C751B@CCK.JPG|right|250px|thumb|A C751B train approaching Choa Chu Kang.]]
|Img=[[File:C751B-Ext(1).png|center-left|160px]] [[File:C751B-Int(1).png|center-right|160px]]
{| style="text-align:Left; font-size:95%; border:1px solid black"
|Info1=
{{Infoline|In service|2000 – Present}}
{{Infoline|Manufacturer|Kawasaki Heavy Industries<br>Nippon Sharyo}}
{{Infoline|Origin|Kobe, Japan}}
{{Infoline|Constructed|1999 – 2001}}
{{Infoline|Number Built|126 cars (21 Trains)}}
|Info2=
{{Infoline|Body Construction|Aluminium-alloy double-skinned construction}}
{{Infoline|Length|23.83 m (DT)<br>22.8 m (M1/M2)}}
{{Infoline|Width|3.2 m}}
{{Infoline|Height|3.7 m}}
{{Infoline|Doors|1.45 m, 8 per car}}
{{Infoline|Maximum Speed|Design: 90 km/h<br>Service: 80 km/h}}
{{Infoline|Traction Control|IGBT-VVVF (Fuji Electric)}}
{{Infoline|Line Voltage|750V DC Third Rail}}
{{Infoline|Track Gauge|1435 mm Standard Gauge}}
}}
 
'''Kawasaki Heavy Industries & Nippon Sharyo 751B''' are the third generation of trains running on the {{NSL}} and the {{EWL}}. These trains were manufactured from 1999 to 2001 by Kawasaki Heavy Industries and Nippon Sharyo, with only 1 difference despite having built to agreed specifications.
 
==History==
The KNS trains were bought mainly to complement the existing trains due to the opening of the Changi Airport Extension on the {{EWL|b=}}. These trains began revenue service in 2001.
 
Some of the trains had luggage racks installed in every carriage of the train, taking up the space of two seats next to the door at the end of each carriage. The purpose of those racks were to let travellers heading to the airport, who usually carry a large amount of luggage, to have a space to place their bags easily.
 
However, these luggage racks were always underutilised. Travellers preferred holding on to their bags where they were standing or sitting, as opposed to placing them on the luggage racks, probably due to convenience and fear of theft. Some commuters were also complaining that these racks took up critically needed space which could be occupied by other passengers which often filled the train. Furthermore, the through train service to Changi Airport was replaced by a shuttle service, dismissing the need to provide these racks for non-airport bound train services. Therefore, trains with the luggage racks had them removed in 2003, leaving an empty standing area, with a purpose of serving as a wheelchair area.
 
===Fragmented Gearbox===
On 13 April 2002, a fault was detected in a train and was subsequently withdrawn to [[Changi Depot]] for investigations. As the train was under warranty, the engineers from the manufacturers of the train and gearbox were flown in on 21 April. They subsequently detected metal fragments in the gearboxes, as well as in those of the other 20 trains. SMRT immediately withdrew all 21 trains and suspended the through train service, replacing it with the shuttle service. Train frequencies were also adjusted until early May, when 8 trains returned to service. By the end of May 2002, all trains have been returned to service and the through service was resumed.<ref>[https://newslink.sg/user/OrderArticleRequest.action?documentId=nica_NP_2002_2407771&year=2002&month=04&date=23 "21 MRT trains withdrawn Longer wait for trains"]. The New Paper (23 April 2002). Retrieved 29 July 2018.</ref>
 
===Replacement===
On 28 September 2020, LTA announced that the 40 additional new trains had been ordered under Contract R151 from Bombardier Transportation to progressively replace KNS trains from 2024 onwards.<ref>[//www.lta.gov.sg/content/ltagov/en/newsroom/2020/september/news-releases/LTA_buys_40_new_trains.html "LTA Buys 40 New Trains for the North-South and East-West Lines"]. Land Transport Authority (28 September 2020).</ref>
 
==Design/Features==
===Passenger Trains===
{| class="toccolours" border=1 style="text-align:center;border-collapse:collapse;"
|-class="SMRT"
!class="LTA"|
!Kawasaki Heavy Industries!!Nippon Sharyo
|-
|-
| In service || 28 January 2000 - Current
!
|colspan=2|<div class="train">{{TrainCar|DT|E40078|left}} {{TrainCar|M1|0047AB}} {{TrainCar|M2|00CED1|4=000}} {{TrainCar|M2|00CED1|4=000}} {{TrainCar|M1|0047AB}} {{TrainCar|DT|E40078|right}}</div>
|-style="background-color:#DDD"
!colspan=3|Exterior Design
|-
|-
| Manufacturer || Kawasaki Heavy Industries]] and Nippon Sharyo
!style="text-align:left"|Livery
|colspan=2|Black,Red,Grey (Top to bottom)
|-
|-
| Constructed || 1999 - 2001
!style="text-align:left"|Train Run Number
|colspan=2|Orange LED
|-style="background-color:#DDD"
!colspan=3|Interior Design
|-
|-
| Number built || 126 carriages (21 trains)
!style="text-align:left"|Seating Capacity
|276 (272 after signalling upgrade)||288 (284 after signalling upgrade)
|-
|-
| Formation || 6 per trainset<br>DT - M1 - M2 - M2 - M1 - DT
!style="text-align:left"|Wheelchair Bay
|12, 1 each at either end of a car||6, 1 each per car
|-
|-
| Capacity || 1920 passengers<br>288 seats
!style="text-align:left"|Door Closing Indicator Lights
|colspan=2|4 Red LED (Side)
|-
|-
| Operator || SMRT Corporation
!style="text-align:left"|Passenger Information System
|colspan=2|Visual Passenger Information System (<span style='color:#888'><s>LED display + </s></span>LCD screen) (Disabled)<br>SMRT Active Route-map and Information System (Dynamic Route Map + VFD display)
|-style="background-color:#DDD"
!colspan=3|System
|-
|-
| Depot(s) || [[Bishan Depot|Bishan]], [[Changi Depot|Changi]] and [[Ulu Pandan Depot|Ulu Pandan]]
!style="text-align:left"|Safety System
|colspan=2|ATC, ATO, ATP, ATS (after signalling upgrade)
|-
|-
| Line(s) served || [[North South Line]] and [[East West Line]]
!style="text-align:left"|Signalling System
|colspan=2|Fixed Block<br>Communication Based Train Control (after signalling upgrade)
|-
|-
| Car body construction || Aluminium-alloy double-skinned construction
!style="text-align:left"|Traction Control
|-
|colspan=2|IGBT-VVVF (Fuji Electric)
| Car length || 23 m
|-
| Width || 3.2 m
|-
| Height || 3.7 m
|-
| Doors= 1.45 m, 8 per car
|-
| Maximum speed || 90 km/h (Design)<br>80 km/h (Service)
|-
| Weight || 34800 kg (DT)<br>39000 kg (M1/M2)
|-
| Traction system || IGBT-VVVF (Fuji Electric)
|-
| Engine(s) || Three-phase induction motor (S120-3380) 140kW 550V 193A 1760rpm
|-
| Electric system(s) || 750 V DC 3<sup>rd</sup> rail
|-
| Safety system(s) || Automatic Train Control (ATC) and Automatic Train Protection (ATP)
|-
| Gauge || 1,435 mm (Standard gauge)
|}
|}


==Exterior design==
==Fleet Numbering==
The most prominent difference between these trains, and trains of the older generation, such as the [[Kawasaki Heavy Industries C151]] before refurbishment, are in terms of its exterior design and colours. The front of the train sports a more slanted and streamlined look, with the run number display in Orange LED Display. The sides of the train, instead of having the conventional white background with a red stripe, consists of a shiny black area covering the middle portion of the train from just above the windows to below the windows, followed by a bold red stripe and a thinner grey stripe at the bottom of the train.
The car numbers of the trains range from x311 to x352, where x depends on the carriage type.
 
*The first digit identifies the position of the car from the closest end of the train; where ‘3’ represents first car, ‘1’ represents second car and ‘2’ represents third car.
==Interior design==
**(Example) Passenger Vehicle 351/352 would consist of 6 cars with serial number 3351, 1351, 2351, 2352, 1352 and 3352 respectively.
All cars are equipped with Liquid Crystal Displays (6 in each car), and all except Train 347/348 feature LED displays. These used to show rail travel information, commercials and movie trailers. They also come with more grab poles, wider seats, more space near the doors and wheelchair space. The interior and exterior design of the train have been improved, incorporating a much sleeker design. The LEDs however have seen little usage after a new series of voice announcements were introduced across the system in mid-2008. (Only trainset 327/328 is currently known to be working).
*Depending on the direction of travel, the sequence may be reversed.
 
The colour layout on these trains are also different from their earlier counterparts. Cars 1 and 6 use a sort of pinkish-purple color on the seats, while cars 2 and 5 use a different shade of blue, and the middle cars using a bluish-green. All door panels and walls are white, which was subsequently adopted in the refurbishment of the [[Kawasaki Heavy Industries C151]].
 
==Experimental programmes==
In 2001, when the Changi Airport Line was opened, some of these trains plying the East West Line had luggage racks installed. These luggage racks were installed in every carriage of the train, taking up the space of two seats next to the door at the end of each carriage. The purpose of those racks were to let travellers to the airport, who usually carry a large amount of luggage, to have a space to place their bags easily.


However, these luggage racks were always underutilised. Travellers preferred holding on to their bags where they were standing or sitting, as opposed to placing them on the luggage racks, probably due to convenience and fear of theft. Some commuters were also complaining that these racks took up critically needed space which could be occupied by other passengers which often filled the train. Furthermore, the through service to Changi Airport was cancelled and replaced by a shuttle service to and from Tanah Merah station, dismissing the need to provide these racks for non-airport bound train services. Therefore, in 2003, trains with the luggage racks had their luggage racks removed, and replaced with an empty standing area, with a dual purpose of serving as a wheelchair area.
==References==
<references/>


==Safety systems==
{{Mass Rapid Transit}}
Kawasaki Heavy Industries & Nippon Sharyo C751B cars are equipped with Automatic Train Control (ATC), supplemented with Automatic train operation (ATO). At a fallback level, Automatic Train Protection (ATP) is available.
{{North–South Line}}
{{East–West Line}}


==Serial number==
[[Category:Train Rolling Stock]]
The car numbers of the trains range from x311 to x352, where x depends on the carriage type. Individual cars are assigned a 4 digit serial number by the rail operator SMRT.
* The first digit depends upon whether the car is the first, second or third car from either end of the train, where the first car equals 3, the second equals 1 & the third equals 2.
* The other 3 digits is the train identification number. A full length train of 6 cars have 2 different identification number, one for the first 3 cars, and the same number plus 1, for the other three. The smaller number is always an odd number. For example, a train would consist of 6 cars with serial numbers, 3333, 1333, 2333, 2334, 1334, 3334 respectively.
* The reason why the car numbers begin with x311 is because there is a revenue car of the first-generation [[Kawasaki Heavy Industries C151]] cars, specially dedicated in transporting goods and trolleys of car number 3301.

Latest revision as of 15:12, 17 June 2023

Kawasaki Heavy Industries & Nippon Sharyo 751B
center-left center-right
*Graphic From SGTrains/Wikipedia/LTA
In service 2000 – Present
Manufacturer Kawasaki Heavy Industries
Nippon Sharyo
Origin Kobe, Japan
Constructed 1999 – 2001
Number Built 126 cars (21 Trains)
Statistics
Body Construction Aluminium-alloy double-skinned construction
Length 23.83 m (DT)
22.8 m (M1/M2)
Width 3.2 m
Height 3.7 m
Doors 1.45 m, 8 per car
Maximum Speed Design: 90 km/h
Service: 80 km/h
Traction Control IGBT-VVVF (Fuji Electric)
Line Voltage 750V DC Third Rail
Track Gauge 1435 mm Standard Gauge

Kawasaki Heavy Industries & Nippon Sharyo 751B are the third generation of trains running on the North–South Line and the East–West Line. These trains were manufactured from 1999 to 2001 by Kawasaki Heavy Industries and Nippon Sharyo, with only 1 difference despite having built to agreed specifications.

History[edit]

The KNS trains were bought mainly to complement the existing trains due to the opening of the Changi Airport Extension on the East–West Line. These trains began revenue service in 2001.

Some of the trains had luggage racks installed in every carriage of the train, taking up the space of two seats next to the door at the end of each carriage. The purpose of those racks were to let travellers heading to the airport, who usually carry a large amount of luggage, to have a space to place their bags easily.

However, these luggage racks were always underutilised. Travellers preferred holding on to their bags where they were standing or sitting, as opposed to placing them on the luggage racks, probably due to convenience and fear of theft. Some commuters were also complaining that these racks took up critically needed space which could be occupied by other passengers which often filled the train. Furthermore, the through train service to Changi Airport was replaced by a shuttle service, dismissing the need to provide these racks for non-airport bound train services. Therefore, trains with the luggage racks had them removed in 2003, leaving an empty standing area, with a purpose of serving as a wheelchair area.

Fragmented Gearbox[edit]

On 13 April 2002, a fault was detected in a train and was subsequently withdrawn to Changi Depot for investigations. As the train was under warranty, the engineers from the manufacturers of the train and gearbox were flown in on 21 April. They subsequently detected metal fragments in the gearboxes, as well as in those of the other 20 trains. SMRT immediately withdrew all 21 trains and suspended the through train service, replacing it with the shuttle service. Train frequencies were also adjusted until early May, when 8 trains returned to service. By the end of May 2002, all trains have been returned to service and the through service was resumed.[1]

Replacement[edit]

On 28 September 2020, LTA announced that the 40 additional new trains had been ordered under Contract R151 from Bombardier Transportation to progressively replace KNS trains from 2024 onwards.[2]

Design/Features[edit]

Passenger Trains[edit]

Kawasaki Heavy Industries Nippon Sharyo
DT M1 M2 M2 M1 DT
Exterior Design
Livery Black,Red,Grey (Top to bottom)
Train Run Number Orange LED
Interior Design
Seating Capacity 276 (272 after signalling upgrade) 288 (284 after signalling upgrade)
Wheelchair Bay 12, 1 each at either end of a car 6, 1 each per car
Door Closing Indicator Lights 4 Red LED (Side)
Passenger Information System Visual Passenger Information System (LED display + LCD screen) (Disabled)
SMRT Active Route-map and Information System (Dynamic Route Map + VFD display)
System
Safety System ATC, ATO, ATP, ATS (after signalling upgrade)
Signalling System Fixed Block
Communication Based Train Control (after signalling upgrade)
Traction Control IGBT-VVVF (Fuji Electric)

Fleet Numbering[edit]

The car numbers of the trains range from x311 to x352, where x depends on the carriage type.

  • The first digit identifies the position of the car from the closest end of the train; where ‘3’ represents first car, ‘1’ represents second car and ‘2’ represents third car.
    • (Example) Passenger Vehicle 351/352 would consist of 6 cars with serial number 3351, 1351, 2351, 2352, 1352 and 3352 respectively.
  • Depending on the direction of travel, the sequence may be reversed.

References[edit]

  1. ↑ "21 MRT trains withdrawn Longer wait for trains". The New Paper (23 April 2002). Retrieved 29 July 2018.
  2. ↑ "LTA Buys 40 New Trains for the North-South and East-West Lines". Land Transport Authority (28 September 2020).
icon Mass Rapid Transit [ V • T • E ]
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Rolling Stock 151 • 651 • 751B • 151A • 151B • 151C • R151
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