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

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: ''Not to be confused with [[Alstom Metropolis C751A]] and [[Alstom Metropolis C751C]].''
{{Infobox/Train
{| class="toccolours" style="float: right; border-collapse: collapse; margin: 0em 1em;" border="1" cellpadding="2" cellspacing="0"
|Name=Kawasaki Heavy Industries & Nippon Sharyo 751B
| colspan="2" style="text-align:center" | <big><strong>Kawasaki Heavy Industries & Nippon Sharyo C751B<br>川崎重工业－日本车辆制造株式会社 C751B</strong></big>
|Img=[[File:C751B-Ext(1).png|center-left|160px]] [[File:C751B-Int(1).png|center-right|160px]]
|-
|Info1=
| colspan="2"| [[File:ext.jpg|center|300px]]Exterior of a C751B train. 
{{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"
! Manufacturer
!colspan=3|Exterior Design
| Kawasaki Heavy Industries and <br>Nippon Sharyo
|-
|-
! Constructed
!style="text-align:left"|Livery
| 1999 - 2001
|colspan=2|Black,Red,Grey (Top to bottom)
|-
|-
! Number built
!style="text-align:left"|Train Run Number
| Passenger service: 126 carriages (21 trains)
|colspan=2|Orange LED
|-style="background-color:#DDD"
!colspan=3|Interior Design
|-
|-
! Formation
!style="text-align:left"|Seating Capacity
| 6 per trainset<br>DT - M1 - M2 - M2 - M1 - DT
|276 (272 after signalling upgrade)||288 (284 after signalling upgrade)
|-
|-
! Capacity
!style="text-align:left"|Wheelchair Bay
| 1920 passengers<br>276/288 seats
|12, 1 each at either end of a car||6, 1 each per car
|-
|-
! Operator
!style="text-align:left"|Door Closing Indicator Lights
| SMRT Corporation
|colspan=2|4 Red LED (Side)
|-
|-
! Depot(s)
!style="text-align:left"|Passenger Information System
| [[Bishan Depot|Bishan]], [[Changi Depot|Changi]] and [[Ulu Pandan Depot|Ulu Pandan]]
|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
|-
|-
! Line(s) served
!style="text-align:left"|Safety System
| [[North South Line]] and [[East West Line]]
|colspan=2|ATC, ATO, ATP, ATS (after signalling upgrade)
|-
|-
| style="background:#efefef;" align="center" colspan="2"| <strong>Specifications</strong> 
!style="text-align:left"|Signalling System
|- 
|colspan=2|Fixed Block<br>Communication Based Train Control (after signalling upgrade)
! Car body<br>construction
| Aluminium-alloy double-<br>skinned construction
|-
|-
! Car length
!style="text-align:left"|Traction Control
| 23 m
|colspan=2|IGBT-VVVF (Fuji Electric)
|-
! 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)<br>Output 415 kVA<br>2 units per motor car (1C2M)
|-
! Engine(s)
| Fuji Electric MLR109<br>Self-Ventilated Three-Phase AC Induction Motor
|-
! Power output
| 140kW<br>(550V 193A 1760 r/min)
|-
! Transmission
| WN (Westinghouse-Natal) Drive
|-
! Auxiliaries
| IGBT-VVVF (Fuji Electric) Auxilary Inverter with<br>Battery Charger 80 kVA + 16 kW
|-
! Electric system(s)
| 750 V DC 3<sup>rd</sup> rail
|-
! Bogies
| Bolsterless Air Spring (Monolink Axlebox Type)
|-
! Safety system(s)
| Automatic Train Control (ATC)<br>Automatic Train Protection (ATP)
|-
! Gauge
| 1,435 mm Standard gauge
|}
|}


'''Kawasaki Heavy Industries & Nippon Sharyo C751B cars''' are part of the rolling stock used in Singapore's original [[Mass Rapid Transit (Singapore)|Mass Rapid Transit]] network, operating on the [[North South Line]] and the [[East West 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 manufactured 66 cars and Nippon Sharyo manufactured 60 cars respectively with one differences (trains built by Kawasaki Heavy Industries had 276 seats while trains built by Nippon Sharyo has 288 seats), even having built to agreed specifications. Kawasaki Heavy Industries & Nippon Sharyo C751B is the third generation of rolling stock to be used on the North South and East West MRT Lines.
==Fleet Numbering==
 
The car numbers of the trains range from x311 to x352, where x depends on the carriage type.
==Fleet==
*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.
[[C751B Fleet Info]]
**(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.
==Exterior design==
The most prominent difference between these trains, and trains of the older generation, such as the [[Kawasaki Heavy Industries C151|Kawasaki C151 train]] 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.
 
==Interior design==
[[File:redint.jpg|150px|thumb|left|Interior of the cab cars]]
[[File:blueint.jpg|150px|thumb|left|Interior of the second or fifth cars]]
[[File:greenint.jpg|150px|thumb|left|Interior of the middle cars]]
All cars are equipped with 6 Liquid Crystal Displays per car (which have since been deactivated), and all except Train 347/348 feature LED displays (which have been replaced by the VFDs of the STARIS system). 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. 327/328 is the only one to have VPIS working in 2009; and in 27 July 2010, STARIS were installed on 319/320 and 321/322 as demonstrators, followed by the rest of the C751Bs from September 2010. All VPIS were removed to make way for the STARIS.
 
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|C151 cars]].
 
==Equipment==
===Main Propulsion Controller/Motor===
The C751B is the second commuter type Electric Multiple Unit (EMU) made in Japan to feature electric systems fully manufactured by Fuji Electric. Propulsion is controlled by VVVF Inverter with 2-level IGBT semiconductor controller, rated at 415 kVA. Each inverter unit controls two motors on one bogie (1C2M), and one motor car features two of such units. Motors are three-phrase AC induction type, model MLR109, with a maximum output of 140 kW.
 
===Bogies===
The C751B uses the monolink axlebox type bolsterless air spring bogie. There are no major technical difference between a trailer and motor car bogie other than additional electrical components for the latter.
 
===Auxiliary Systems===
A break from tradition, the C751B features auxiliary inverters for its electrical systems on all six cars of the train. Previously, auxiliary inverters are mounted only on motor cars. The VVVF Inverter is controlled by IGBT semiconductors and rated at 80 kVA. A battery charger is built with the inverter and provides 16 kW output.
 
==Experimental programmes==
In 2001, when the Changi Airport Extension 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 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 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 them removed, and replaced with an empty standing area, with a dual purpose of serving as a wheelchair area.
 
==SMRT Active Route Map Information System==
All C751Bs STARIS are operational.
 
==Train withdrawal incidents==
On 13 April 2002, a fault was detected in a C751B train and was subsequently withdrawn to the [[Changi Depot]] for investigations. As the train is under warranty, the engineers from the manufacturers of the train and gearbox flown in on 21 April and they detected that the gearboxes had metal fragments found in it on 22 April. When they found out the other 20 trains had fragmented gearboxes on 23 April 2002, SMRT withdraw all 21 C751B trains and suspended the Boon Lay - Changi Airport train through service and replaced with the Tanah Merah - Changi Airport shuttle service. Train's frequency was also adjusted until early May when 8 trains returned to service. By June 2002, all C751B trains had return to service and the through service was resumed.
 
==Safety systems==
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.


==Serial number==
==References==
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.
<references/>
* The first digit depends upon whether the car is the first, second or third car from the end of the train it is nearer to, where the first car has a 3, the second has a 1 & the third has a 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 at the front. For example, train 343/344 would consist of 6 cars with serial numbers, 3343, 1343, 2343, 2344, 1344, 3344 respectively.
* The reason why the car numbers begin with x311 is because there is a 4-car version of the C151 bearing the set number 301/302. It used to be a money train and is currently used by SCDF for training purposes.
** Kawasaki Heavy Industries built sets 311/312, 315/316, 319/320, 323/324, 327/328 - 333/334, 343/344, 347/348, 351/352. (11 trainsets)
** Nippon Sharyo built sets 313/314, 317/318, 321/322, 325/326, 335/336 - 341/342, 345/346, 349/350. (10 trainsets)


==Related Links==
*[[Trains]]
{{Mass Rapid Transit}}
{{Mass Rapid Transit}}
{{North–South Line}}
{{East–West Line}}


[[Category:Trains]]
[[Category:Train Rolling Stock]]
[[Category:Train Rolling Stock]]

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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