Difference between revisions of "Alstom Metropolis 751A"

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The '''Alstom Metropolis C751A''' are the first generation of communication-based train control(CBTC) rolling stock that has been in use in Singapore’s Mass Rapid Transit(MRT) lines since 2003. Alstom was contracted in 1997 and 1998 (as '''C751A''') by the Land Transport Authority (LTA) in Singapore to supply for its North East MRT Line in 2003.
{{Infobox/Train
|Name=Alstom Metropolis 751A
|Img=[[File:C751A-Ext(1).png|center-left|160px]] [[File:C751A-Int(1).png|center-right|160px]]<br>[[File:C751A-Ext(2).png|center-left|160px]] [[File:C751A-Int(2).png|center-right|160px]]
|Info1=
{{Infoline|In service|2003 – Present}}
{{Infoline|Manufacturer|Alstom}}
{{Infoline|Origin|Valenciennes, France}}
{{Infoline|Constructed|2000 – 2001}}
{{Infoline|Refurbishment|2019 – Present<br>CRRC Nanjing Puzhen}}
{{Infoline|Number Built|150 cars (25 Trains)}}
|Info2=
{{Infoline|Body Construction|Welded aluminium}}
{{Infoline|Length|23.65 m (DT)<br>22.8 (Mp/Mi)}}
{{Infoline|Width|3.2 m}}
{{Infoline|Height|3.7 m}}
{{Infoline|Doors|1.45 m, 8 per car}}
{{Infoline|Maximum Speed|Design: 100 km/h<br>Service: 90 km/h}}
{{Infoline|Traction Control|IGBT-VVVF (Alstom ONIX)}}
{{Infoline|Line Voltage|1500V DC Overhead Catenary}}
{{Infoline|Track Gauge|1435 mm Standard Gauge}}
}}


The automated system version, previously known as “moving block systems”, CBTC systems do not require traditional "fixed-block track circuits" for determining train position. Instead, they rely on "continuous two-way digital communication" between each controlled train and a wayside control center, which may control an area of a railroad line, a complete line, or a group of lines. Recent studies consistently show that CBTC systems reduce life-cycle costs for the overall rail property and enhance operational flexibility and control.
'''Alstom Metropolis 751A''' are the first generation of trains running on the {{NEL}}.


A development in Singapore's MRT history, the six-car trains on the North East Line are powered by overhead catenary, in contrast to the train cars on all the other operating lines prior to this, which are powered by a third rail. This was partially due to the fact that authorities consider overhead wires to be unsightly and as such do not allow for trains to be powered using this method on elevated lines. Since this line is the first to be fully underground in Singapore, the authorities had a choice between powering the trains on this line by overhead catenary or third rail. An overhead catenary power supply was decided upon. This is also the first time in the history of Singapore's MRT history that the seats in every compartment of the train are made up of the same colours. 25 trainsets of six cars each were purchased for the North East Line. In addition, due to its driverless configuration, it is a unique type of train where there are windows at the front and back of the train, giving passengers an impressive view as the train speeds through the tunnel.
==History==
The trains on the North East Line are powered by overhead catenary, a first in history. Rolling stock on all the other operating lines are powered by a third rail because the authorities considered overhead wires to be unsightly and did not allow for trains to be powered using this method on elevated lines. Since this line is the first to be fully underground, the authorities had a choice between powering the trains on this line by overhead catenary or third rail.<ref>[//www.tsd.org/cbtc/projects/SIG_Singapore_AutomaticMetro_en.pdf  "Singapore Northeast Line: will soon be the largest, fully automatic metro system in the world"]</ref>.


==Specifications==
===Refurbishment===
[[Image:C751A front.jpg|250px|thumb|Front of an Alstom Metropolis C751A at Sengkang Depot.]]
In December 2018, the Land Transport Authority (LTA) had awarded the contract worth about $116.7 million to CRRC Nanjing Puzhen for the refurbishment of 751A.<ref>[//www.lta.gov.sg/apps/news/page.aspx?c=2&id=f901e290-ad09-4d05-9309-c974aa26c0ae "Enhancement works for the North East Line to commence in 2019"]. Land Transport Authority (17 December 2018). Retrieved 25 December 2018.</ref> The trains' interior, such as seats, panels, and flooring, will be replaced whereas the air-conditioning & ventilation systems will be upgraded. The trains will also be retrofitted with new passenger information displays. The first refurbished train was completed in 2022 and works on the remaining trains are expected to be completed by 2024.
{| style="text-align:Left; font-size:95%; border:1px solid black"
 
==Design/Features==
{| class="toccolours" border=1 style="text-align:center;"
|-class="SBST"
!class="LTA"|
!colspan=2|Initial
!Refurbished
|-
|-
| In service || 20 June 2003 - Current
!
|colspan=2|<div class="train">{{TrainCar|DT|6964BE|left}} {{TrainCar|Mp|6964BE}} {{TrainCar|Mi|6964BE}} {{TrainCar|Mi|6964BE}} {{TrainCar|Mp|6964BE}} {{TrainCar|DT|6964BE|right}}</div>
|colspan=2|<div class="train">{{TrainCar|DT|9B5992|left}} {{TrainCar|Mp|9B5992}} {{TrainCar|Mi|9B5992}} {{TrainCar|Mi|9B5992}} {{TrainCar|Mp|9B5992}} {{TrainCar|DT|9B5992|right}}</div>
|-style="background-color:#DDD"
!colspan=4|Exterior Design
|-
|-
| Manufacturer || Alstom
!style="text-align:left"|Livery
|colspan=3|Black,Red,Purple,White (Top to bottom)
|-
|-
| Built at || Valenciennes, France
!style="text-align:left"|Train Run Number
|colspan=3|Orange LED
|-style="background-color:#DDD"
!colspan=4|Interior Design
|-
|-
| Family name || Metropolis
!rowspan=2 style="text-align:left"|Seating Capacity
!Original!!Bar Train
|rowspan=2|240
|-
|-
| Constructed || 2000 - 2003
|296||240
|-
|-
| Number built || 150 carriages (25 trains)
!style="text-align:left"|Wheelchair Bay
|colspan=3|2, 1 each at Third and Fourth Car
|-
|-
| Formation || 6 per trainset<br>Tc + M + M + M + M + Tc
!style="text-align:left"|Door Closing Indicator Lights
|colspan=3|1 Yellow Alert Light (Top)
|-
|-
| Capacity || 1920 passengers (320 per car)<br>288 seats (48 per car)
!style="text-align:left"|Passenger Information System
|colspan=2|Visual Passenger Information System (LED display<span style='color:#888;'><s> + LCD screen</s></span>)
|Visual Passenger Information System<br>Dynamic Route Map Display
|-style="background-color:#DDD"
!colspan=4|System
|-
|-
| Operator || SBS Transit
!style="text-align:left"|Safety System
|colspan=3|ATC, ATO, ATP, ATS
|-
|-
| Depot(s) || [[Sengkang Depot|Sengkang]]
!style="text-align:left"|Signalling System
|colspan=3|Communication Based Train Control
|-
|-
| Line(s) served || [[North East Line]]
!style="text-align:left"|Traction Control
|colspan=3|IGBT-VVVF (Alstom ONIX)
|-
|-
| Car body construction || Welded aluminium
|-
| Car length || 23.65 m (Tc)<br>22.8 m (M)
|-
| Width || 3.2 m
|-
| Height || 3.7 m
|-
| Floor height || 110 cm
|-
| Doors || 1.40 m, 8 per car
|-
| Maximum speed || 100 km/h
|-
| Weight || 35000 kg
|-
| Acceleration || 1.1 m/s<sup>2</sup>
|-
| Deceleration || 1.4 m/s<sup>2</sup> (Emergency)
|-
| Traction system || IGBT-VVVF (Alstom ONIX 1500)
|-
| Electric system(s) || 1500 V AC Overhead catenary
|-
| Safety system(s) || Automatic Train Control (ATC) (Communication-based train control (CBTC))
|-
| Gauge || 1,435 mm (Standerd gauge)
|}
|}


==Serial number==
==Fleet Numbering==
Individual cars are given a five-digit serial number by the rail operator, SBS Transit.
The car numbers of the trains range from 7x001 to 7x050, where x depends on the carriage type.
* The first digit of a car's serial number is always a seven.
*The second digit identifies the position of the car from the closest end of the train; where ‘1’ represents first car, ‘2’ represents second car and ‘3’ represents third car.
* The second digit depends upon whether the car is the first, second or third car from either end of the train, where the first car equals one, the second equals two, and the third equals three.
**(Example) Passenger Vehicle 7049/7050 would consist of 6 cars with serial number 71049, 72049, 73049, 73050, 72050 and 71050 respectively.
* The third digit of a car's serial number is always a zero.
*Depending on the direction of travel, the sequence may be reversed.
* The other two digits is the train identification number. A full length train of six cars have two different identification numbers, one for the first three cars, and the same number plus one, for the other three. The smaller number is always an odd number.
 
A typical SBS Transit NEL Train, for example, would consist of serial numbers 71001, 72001, 73001, 73002, 72002, 71002.
==References==
<references/>
 
{{Mass Rapid Transit}}
{{North East Line}}
 
[[Category:Train Rolling Stock]]

Latest revision as of 15:12, 17 June 2023

Alstom Metropolis 751A
center-left center-right
center-left center-right
*Graphic From SGTrains/Wikipedia/LTA
In service 2003 – Present
Manufacturer Alstom
Origin Valenciennes, France
Constructed 2000 – 2001
Refurbishment 2019 – Present
CRRC Nanjing Puzhen
Number Built 150 cars (25 Trains)
Statistics
Body Construction Welded aluminium
Length 23.65 m (DT)
22.8 (Mp/Mi)
Width 3.2 m
Height 3.7 m
Doors 1.45 m, 8 per car
Maximum Speed Design: 100 km/h
Service: 90 km/h
Traction Control IGBT-VVVF (Alstom ONIX)
Line Voltage 1500V DC Overhead Catenary
Track Gauge 1435 mm Standard Gauge

Alstom Metropolis 751A are the first generation of trains running on the North East Line.

History[edit]

The trains on the North East Line are powered by overhead catenary, a first in history. Rolling stock on all the other operating lines are powered by a third rail because the authorities considered overhead wires to be unsightly and did not allow for trains to be powered using this method on elevated lines. Since this line is the first to be fully underground, the authorities had a choice between powering the trains on this line by overhead catenary or third rail.[1].

Refurbishment[edit]

In December 2018, the Land Transport Authority (LTA) had awarded the contract worth about $116.7 million to CRRC Nanjing Puzhen for the refurbishment of 751A.[2] The trains' interior, such as seats, panels, and flooring, will be replaced whereas the air-conditioning & ventilation systems will be upgraded. The trains will also be retrofitted with new passenger information displays. The first refurbished train was completed in 2022 and works on the remaining trains are expected to be completed by 2024.

Design/Features[edit]

Initial Refurbished
DT Mp Mi Mi Mp DT
DT Mp Mi Mi Mp DT
Exterior Design
Livery Black,Red,Purple,White (Top to bottom)
Train Run Number Orange LED
Interior Design
Seating Capacity Original Bar Train 240
296 240
Wheelchair Bay 2, 1 each at Third and Fourth Car
Door Closing Indicator Lights 1 Yellow Alert Light (Top)
Passenger Information System Visual Passenger Information System (LED display + LCD screen) Visual Passenger Information System
Dynamic Route Map Display
System
Safety System ATC, ATO, ATP, ATS
Signalling System Communication Based Train Control
Traction Control IGBT-VVVF (Alstom ONIX)

Fleet Numbering[edit]

The car numbers of the trains range from 7x001 to 7x050, where x depends on the carriage type.

  • The second digit identifies the position of the car from the closest end of the train; where ‘1’ represents first car, ‘2’ represents second car and ‘3’ represents third car.
    • (Example) Passenger Vehicle 7049/7050 would consist of 6 cars with serial number 71049, 72049, 73049, 73050, 72050 and 71050 respectively.
  • Depending on the direction of travel, the sequence may be reversed.

References[edit]

  1. ↑ "Singapore Northeast Line: will soon be the largest, fully automatic metro system in the world"
  2. ↑ "Enhancement works for the North East Line to commence in 2019". Land Transport Authority (17 December 2018). Retrieved 25 December 2018.
icon Mass Rapid Transit [ V • T • E ]
Overview History • Stations • Fare and Ticketing • Facilities • Safety • Security
Lines North–South Line • East–West Line • North East Line • Circle Line • Downtown Line • Thomson–East Coast Line

FutureJurong Region Line • Cross Island Line

Rolling Stocks 151 • 151A • 151B • 151C • R151 • T251 • 751A • 751B • 751C • 830 • 830C • 851E • 951

Former651

Future J151 • CR151

Depots Bishan • Changi • Gali Batu • Kim Chuan • Mandai • Sengkang • Ulu Pandan • Tuas
Future Changi East • East Coast • Tengah
icon North East Line [ V • T • E ]
Stations HarbourFront • Outram Park • Chinatown • Clarke Quay • Dhoby Ghaut • Little India • Farrer Park • Boon Keng • Potong Pasir • Woodleigh • Serangoon • Kovan • Hougang • Buangkok • Sengkang • Punggol
North East Line extension: Punggol Coast
Rolling Stock 751A • 751C • 851E
Depots Sengkang
Others Bridging Service
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