Kawasaki Heavy Industries & Nippon Sharyo C751B (KNS)

The Kawasaki Heavy Industries & Nippon Sharyo C751B trains are the third generation of rolling stock for the North-South and East-West MRT lines.

21 trains of six cars were purchased and have been in passenger service since 8 May 2000.

The trains are currently housed at the Bishan, Ulu Pandan, Changi and Tuas train depots.

The C751B trains are the first Singapore MRT trains to use the insulated-gate bipolar transistor with variable voltage variable frequency (IGBT-VVVF) traction control system which is highly efficient.

Ahead of its time, it is also the first Singapore MRT trains to come pre-equipped with the Train Integrated Management System (TIMS) that enables real-time systems monitoring for train captains.

These trains also use radial-arm axles with bolsterless air-spring bogies and come installed with the visual passenger information system (VPIS) for better ride comfort and more informative journeys.

The C751B trains had entered passenger service with the legacy Westinghouse FS2000 fixed-block signalling system, capable of semi-automated operations with operational input from train captains.

Utilising Thales' SelTrac Communications-Based Train Control (CBTC) signalling system, the C751B trains are now capable of fully automated operations with a train captain manning on board.

These trains are being decommissioned since 2020 and to be replaced by the Alstom Movia R151.

At a Glance

Kawasaki Heavy Industries & Nippon Sharyo C751B

North-South Line

East-West Line

Built 1999 - 2001
Decommissioning from 2020

21 trains of 6 cars each, numbered 311/312 to 351/352

The Kawasaki Heavy Industries & Nippon Sharyo C751B trains are maintained and operated by SMRT Trains.


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History

Contract 751B for the design and building of 21 new trains for the North-South and East-West MRT lines (NSEWL) was awarded by the Land Transport Authority (LTA) to the consortium of Kawasaki Heavy Industries, Ltd. and Nippon Sharyo, Ltd. in January 1998 at a value of S$226 million.

These trains were procured to supplement the then 85-train fleet, consisting of only the Kawasaki Heavy Industries C151 and Siemens C651, on the North-South and East-West MRT lines for increasing train deployment numbers, especially during peak hours, as well as for serving the Changi Airport extension, as announced on 15 November 1996.

Kawasaki Heavy Industries and Nippon Sharyo manufactured all 126 carriages for 21 C751B trains with little to no visible differences, apart from the builder plate.

It was initially planned that five specific C751B trains were to be permanently deployed for the Changi Airport extension, with the other 16 C751B trains for use on the North-South Line and East-West Line. In 1998, the Land Transport Authority revealed it had conducted a study of the Heathrow Express in London and Airport Express Line in Hong Kong on the possibility of luggage storage spaces on specific C751B trains, with the likely placement being beside the doors, at a cost of reduced passenger seating.

The first of 21 C751B trains arrived in Singapore in September 1999 and underwent testing and commissioning works. The C751B trains officially entered passenger service on 8 May 2000, in time for the opening of the Changi Airport extension, which fully opened on 8 February 2002, and was touted by the media to be state of the art at that time.

Refurbishment and Upgrading

Between 2014 and 2016, all C751B trains were upgraded to be equipped with the Thales SelTrac Communications-Based Train Control moving-block signalling system under the Re-Signalling Project of Contracts 1652A and 1652B, awarded by SMRT Trains and Land Transport Authority on 1 February 2012.

Following the upgrade, two seats at both ends of the C751B train are replaced with a signalling box to house the new signalling equipments – the Vehicle On-Board Controller (VOBC) – configured in hot standby where the front Vehicle On-Board Controller is usually the active one, while the other one in passive, providing redundancy should one end fails by seamlessly switching to the other available Vehicle On-Board Controller.

Replacement and Decommissioning of C751B trains

The Land Transport Authority announced the replacement of the C751B and C651 trains with the Alstom Movia R151 trains on 28 September 2020, on top of the initial announcement to only replace the first generation C151 trains on 25 July 2018.

The first C751B train decommissioned from its approximately 21-year service in early 2021. As of April 2024, only six of the 21 C751B remain in passenger service.

Lines


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Design

Exterior

The C751B trains carry a dark exterior livery: a dark background, with a red band down the middle, and a grey band at the bottom.

The front of the train is slanted, giving it a more streamlined look.

An orange LED display at the top-right corner of the train's head is used to indicate the train numbers.

Interior

There are three colour schemes in the train cars, with each colour applied to two cars of the train.

From the train ends to the middle cars, they are coloured maroon, cobalt blue, and turquoise.

There are more grab poles, wider seats, and larger stand back areas near doors.


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Features

Builder Plate

The plate lists the companies involved in the manufacture of the train, and also the year it was built.

It is located at both ends of the train.

Door Closing Indicator

Four high-intensity red LED lights that are positioned at both corners of each door will light up when the doors are closing.

Emergency Communication Button

Emergency Communication Buttons are located at the side of the train doors to contact the train staff in an emergency.

Emergency Exits

Emergency exits are located at both ends of the train.

The emergency exit ramp will be deployed in an emergency.

Grab Handles at Doorways

Provide support for passengers boarding or alighting the trains and for passengers standing near the doors.

Overhead Hand Grips

Three rows of hand grips are positioned along the aisles of the train cabins to provide standing passengers with increased support.

STARiS

STARiS is installed in all C751B trains.

It provides commuters with their route information throughout their journey, and indicates which side the doors will open.

Wheelchair Bay

The C751B trains initially came with luggage racks, but were eventually removed and the area now serves as a de-facto wheelchair bay.

These bays are located in every train car beside the door nearest to the centre of the train.

Modifications

LED Lighting

Energy efficient light-emitting diode (LED) lighting were trialled in only train cars 3328 and 1328.

Modification of Handrails

Handrails were modified as a trial by the Land Transport Authority to encourage commuters to move towards the centre of the car.

This was trialled in train car 2335, and was successful and have been implemented to the whole C751B fleet.

STARiS Version 2

Three sets of liquid-crystal display (LCD) screens for STARiS Version 2 had been installed on the overhead panels of train car 3322.

The screens were then removed in 2016.


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Technical Specifications

DT
M1
M2
M2
M1
DT

DT: Driving Trailer (unpowered); M1/M2: Motor car

Manufacturer
Kawasaki Heavy Industries, Ltd.
Nippon Sharyo, Ltd.
Number Built
126 cars (21 trains)
Train Numbers
311/312 - 351/352
Car Body Construction
Aluminium-alloy double-skinned construction
Traction Control
IGBT-VVVF (Fuji Electric)
Line Voltage
750 V DC (nominal) from third rail
Gauge
Standard gauge (1,435 mm)
Maximum Speed
90 km/h (design)
80 km/h (service)
Train Length
139 m (6 cars)
Car Length
23.83 m (DT)
22.80 m (M1/M2)
Width
3.2 m
Height
3.7 m
Train Weight
222.8 t (tare condition/unladen)
320.3 t (fully laden)
Doors
1.45 m wide, 8 per car
Seating Capacity
272 seats

The following is a list to other resources with additional information on this topic.


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