British Rail Class 777

Last updated

British Rail Class 777
METRO
777010 at Hooton Station 20210728-1.jpg
Merseyrail Class 777 at Hooton
In service23 January 2023 –present [1] [2]
Manufacturer Stadler Rail
Assembly
  • Stadler Altenrhein AG
  • Stadler Rheintal AG [3]
Built at
Family nameMETRO
Replaced
Constructed2018–Present
Number built53 [6]
Formation
  • 4 cars per unit:
  • DTSO-MSO-MSO-DTSO [7]
Fleet numbers(see § Fleet details)
Capacity182 seats [5]
Owners Merseytravel
Operators Merseyrail
Depots
Lines served
Specifications
Car body construction Aluminium
Train length64.98 m (213 ft 2 in)
Width2.820 m (9 ft 3.0 in)
Height3.828 m (12 ft 6.7 in)
Floor height960 mm (3 ft 2 in)
DoorsDouble-leaf sliding plug, each 1.300 m (4 ft 3.2 in) wide(total 6 per side)
Wheel diameter760 mm (30 in)
Wheelbase Bogies: 2.400 m (7 ft 10.5 in)
Maximum speed
  • On external supply:
    75 mph (120 km/h)
  • 777/1 in battery mode:
    62 mph (100 km/h) [note 1]
Weight99 t (97 long tons; 109 short tons)
Traction system IGBT-VVVF
Traction motors 6 × TSA TMF 50-20-4,
each of 250 kW (340 hp) [9]
Power output
  • At wheels:
  • Max.: 2,100 kW (2,800 hp)
  • Cont.: 1,500 kW (2,000 hp)
Tractive effort Starting: 162 kN (36,000 lbf)
Acceleration Starting: 1.1 m/s2 (3.6 ft/s2)
Electric system(s) 750 V DC   third rail
Current collector(s) Contact shoe
UIC classification 2′(Bo)′(Bo)′(Bo)′2′
Braking system(s) Electro-pneumatic and regenerative
Safety system(s)
Coupling system Dellner
Multiple working Within class (max. 2 units) [7]
Track gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge
Notes/references
Sourced from [10] unless otherwise noted.

The British Rail Class 777 METRO is a class of electric multiple unit passenger trains currently being delivered by the Swiss rolling stock manufacturer Stadler Rail, being used on the Merseyrail network in the Liverpool City Region and adjacent areas of Cheshire and Lancashire. The trains have the ability to operate on the third rail-powered sections of the network, with some units carrying onboard batteries to allow use on unpowered track. Ordered in 2016, construction of the units began in 2018. The first unit entered service on 23 January 2023, following delays to the deployment programme. The Class 777 will replace Merseyrail's current Class 507 and Class 508 units, which were built between 1978 and 1980. Seven units of the total 53 ordered are being configured as battery electric multiple units (BEMUs) for use on non-electrified lines, being designated subclass 777/1.

Contents

History

Background

The replacement of the Class 507 and Class 508 fleet that has been in use on the Merseyrail commuter rail network since the late 1970s, had been proposed by Merseytravel as early as 2011. [11] In May 2023, the Class 313 (which entered service in 1976) was withdrawn, [12] making the Class 507 and 508 the oldest electric multiple units in passenger service on the National Rail network. [13] However, the older 1972 stock and 1973 stock are still in service on the London Underground.

In 2014, Liverpool City Region set out a 30 year rail vision, outlining investments that would and could be made to improve rail transport in the region. This included replacement of both the Class 507 and 508 trains with a new high capacity, dual voltage train fleet. [14] In 2015, Merseytravel gained approval to go out to tender to replace the train fleet. [15] In January 2016, Merseytravel announced that a total of five rolling-stock manufacturers had been shortlisted to build the new fleet – Bombardier, Siemens, CAF, Stadler Rail, and a consortium of Mitsui, Alstom, and the East Japan Railway Company. [12]

Contract award

On 16 December 2016, Merseytravel announced Stadler Rail would manufacture a new fleet of 52 dual-voltage-capable articulated four-car units as part of a £460 million fleet replacement project. [16] [17] [18] [19] Merseytravel has an option for a further 60 units. [17] Delivery of the Class 777 fleet was scheduled to start in mid-2019, and its entry into service was set for the following year. [18] The new trains would increase capacity by 60%, as well as cutting journey times due to faster acceleration.

The purchase was financed by Liverpool City Region itself, rather than an external agency such as a bank or rolling stock leasing company. [11] The Class 777 units will therefore be owned by the regional public transport operator Merseytravel and leased to the franchise operator Merseyrail; this made Merseytravel the only public-sector mainline rolling-stock owner in the United Kingdom. [11] This is unlike the preceding fleet, owned by the private leasing agent Angel Trains. [11]

Merseytravel elected to have the new fleet's maintenance requirements addressed via a contract with Stadler; this arrangement included the modernisation of two existing traction maintenance depots (TMD), at Kirkdale and Birkenhead North. For training purposes, a driver cab simulator has been installed in Kirkdale TMD. [11]

As part of Merseytravel's plan to extend the Kirkby line to the new Headbolt Lane railway station using battery-powered Class 777 units, the Class 777 order was increased from 52 to 53 units so that there would be sufficient stock for battery testing to take place. [20]

Infrastructure modifications

To accommodate the new Class 777 fleet, extensive infrastructure changes were necessitated. [11] These adaptations were performed under a rolling programme between October 2018 and May 2019; changes included adjustments to 97 platforms at 56 stations across the Merseyrail network, along with track realignments and other refinements, primarily for the purpose of improving passenger accessibility. Another cause for the alterations was the increased length of the new units, which was addressed via a mixture of platform lengthening and signal repositioning where required. The programme was structured as to minimise disruption to Merseyrail's scheduled services wherever possible. [11] A new trackside Wi-Fi network, provided by Panasonic, was installed to provide continuous real-time connectivity between all trains and the Sandhills control centre, along with free internet access for passengers. New bulk power supplies were installed, along with eight new substations and miscellaneous cable upgrades, to provide greater quantities of electricity. [11]

Unlike the preceding trains, the Class 777 was designed to be operated without guards; however, the announced proposal to redeploy guards into other customer service roles within Merseyrail was subject to considerable criticism. [21] Accordingly, while the fleet was initially to be launched under driver-only operations, in September 2018 it was announced that there would be a second member of staff on board, ending a two-year dispute between the National Union of Rail, Maritime and Transport Workers (RMT) and Merseyrail. [22]

Testing and delivery

Undergoing preliminary testing in St. Margrethen in Switzerland, with a temporarily-fitted windowless front emergency door Stadler Rail - Merseyrail Class 777 (49827029117).jpg
Undergoing preliminary testing in St. Margrethen in Switzerland, with a temporarily-fitted windowless front emergency door
Class 777 with passenger doors open and sliding gap-fillers deployed Class 777010 at Hightown during Mixed-Traffic Test.jpg
Class 777 with passenger doors open and sliding gap-fillers deployed
Class 777 alongside Class 508 Class 777010 at Hightown.jpg
Class 777 alongside Class 508

During early October 2018 the bodyshells for the first unit were completed. [23] This unit subsequently underwent pre-delivery dynamic testing in both Switzerland and Germany during late 2019. [24] [25] The first unit, 777003, was delivered to Kirkdale TMD on 16 January 2020. [26] [27] On 16 March 2020, the unit commenced test runs on the Kirkby branch of the Northern Line. [28] By October 2020, ten units had been delivered to Kirkdale TMD. [29]

In 2018, it was announced that a train configured as a battery electric multiple unit was to be tested on sections of unelectrified track. [4] [30] Following the trial, it was announced in July 2021 that the units tested had been able to travel up to 20 miles (32 km) without the need for recharging. The Liverpool City Region Combined Authority announced that the battery-powered trains will run to the new Headbolt Lane station at Kirkby, which opened on 4 October 2023. [31] In December 2022, a maximum test range of 135 km (84 miles) was achieved, which was "much longer than we expected". [32]

In July 2021, full daytime testing of the units was underway. [33] In August 2021, the Office of Rail and Road (ORR) authorised the introduction of these units into passenger operation. [13] In May 2022, it was expected that the fleet would be "phased into service by autumn" of the same year, with no exact date given. [34]

Passenger services with the class commenced on 23 January 2023, initially using unit 777049. [1] [2] [35] The fleet was further rolled out over the following weeks, and from 6 March 2023 4 train per hour service was restored on the Kirkby line, with Class 777 units being exclusively used, however on some dates old Class 507 and Class 508 stock was used due to various technical faults. In preparation for the Grand National, the Class 777s were introduced in small numbers on the Ormskirk branch from 10 March 2023, [36] Rollout on the Ormskirk branch continues as of May 2023, with further rollout of the units to other parts of the Merseyrail network expected later in 2023. In preparation for the Eurovision Song Contest 2023, which took place in Liverpool, units received a special Eurovision decal, with unit 777013 receiving a full Eurovision livery.

As of July 2023, the roll out was still plagued by "teething" and "software" issues, further delaying the introduction of the units. [37]

Design

As part of the Stadler METRO train family, the units are built on the same platform as the BVG Class IK stock used on the Berlin U-Bahn and future units being developed for the Minsk Metro and Glasgow Subway. [38] The units are configured for high-capacity, delivering a 50% increase in per-carriage capacity than the preceding fleets. [11] They have a higher rate of acceleration, yet use 20% less energy than the old rolling stock, due to increased system efficiency and a reduced weight, being roughly 5.5 tonnes lighter. The introduction of the Class 777 is reportedly set to achieve a 10% reduction in journey time over older stock, attributed to its greater rate of acceleration. [11] There is also an emphasis on shared data; each train will actively monitor the number of passengers on board and relay this to Merseyrail's Sandhills control centre, allowing for more informed and responsive management of the network. [11]

Each Class 777 unit has two longer driving trailer vehicles positioned at each end, with one set of twin doors on either side, whilst the two intermediate motor cars have two sets of doors. For accessibility purposes, all doorways have been outfitted with sliding steps that move into position when the train is stopped at a platform, enabling passengers using wheelchairs to board and disembark without relying upon a separately deployed ramp. [10] The carriages will feature an open gangway design, the first class of train on the Merseyrail network to feature this design. [11] The passenger facilities are much improved over legacy stock, each carriage being fitted with modern amenities such as electrical and USB sockets, as well as bike racks. Like the previous Class 507 and 508 fleets, the Class 777s will not be fitted with toilets. [11] As part of the bespoke design, an LED letter 'M' has been sandwiched between the headlight clusters, illuminating yellow on the front of the train, and red on the rear. [39]

Because current regulatory policy makes it unlikely that future extensions of Merseyrail's unshielded third rail traction power supply will be approved, [40] Class 777 units will be delivered with provision for the future installation of 25 kV 50 Hz AC overhead line traction equipment. [10] [4] [11] There is also allowance for the new trains to be configured as battery electric multiple units (BEMUs), [31] which would allow them to operate on unelectrified lines without needing infrastructure upgrades. This is in addition to the backup battery set that will be fitted to all Class 777 units from new, as these will only have capacity for short-distance low-speed movements around depots and maintenance facilities. [41]

After successful trials of battery operation in 2021, the Class 777 order was amended so that seven units out of the total 53 would be delivered with the additional traction battery equipment. [8] These units, which Stadler refer to as "independently powered" EMUs, will be numbered in subclass 777/1. [42] The battery packs will be carried on the underframes of the DTSO (driving trailer) vehicles, while the battery cooling systems will be placed on the roofs of the same vehicles. [3] Charging can be performed from the third-rail supply, as well as from regenerative braking. Stadler claim that the battery packs will have a lifespan of at least eight years or 10,000 charge/discharge cycles. [3]

Class 777/1 additional details: [3]
Battery technology LTO-NMC
Total battery capacity320 kWh
Battery operating voltage386 V DC
Expected battery lifetimeat least 8 years
Nominal battery range34 miles (55 km)
Max speed in battery mode62 mph (100 km/h) [note 1]
Unit axle loadmax. 16.9 tonnes (16.6 long tons; 18.6 short tons)

Fleet details

Units with even numbers were built in Altenrhein, Switzerland, while those with odd numbers were built in Siedlce, Poland. [43]

SubclassOperatorQty. [8] Year builtCars per unitUnit nos.Notes
777/0Merseyrail462018–20224777001–777039,777041, 777043, 777045, 777047, 777049, 777051, 777053 [7] [44] Standard variant.
777/172022–2023777140, 777142, 777144, 777146, 777148, 777150, 777152 [42] Variant fitted with traction batteries for use on unelectrified lines. [8]

Illustration

Merseyrail Class 777 w-pantograph.png
Illustration of a Merseyrail Class 777 unit (based on concept art)

Special livery

In May 2023, unit 777013 was given a Eurovision Song Contest 2023 themed vinyl wrap livery, to celebrate the contest taking place in Liverpool. [45]

Notes

  1. 1 2 The Stadler datasheet for the IPEMU variant (subclass /1) quotes 100 km/h, [3] but the accompanying press release specifies 80 km/h (50 mph) instead. [8]

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Merseytravel is the passenger transport executive, responsible for the coordination of public transport in the Liverpool City Region in North West England. Merseytravel was established on 1 December 1969 as the Merseyside Passenger Transport Executive. From 1 April 2014, with the creation of the Liverpool City Region, Merseytravel expanded its area of operation from the metropolitan county of Merseyside to also include the Borough of Halton.

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<span class="mw-page-title-main">Northern line (Merseyrail)</span> Line part of the Merseyrail network

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References

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  36. ↑ "And they're off! Liverpool City Region's new trains set to roll out on Ormskirk line in time for Grand National" . Liverpool City Region Combined Authority. 6 April 2023. Retrieved 3 May 2023. Following the fleet's launch on the Kirkby line, passengers will start to see the new trains in passenger service on the Ormskirk line from next Monday (10 April).
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  45. ↑ "Merseyrail gets in the Eurovision spirit with its own song!". RailAdvent. 6 May 2023. Retrieved 6 May 2023.
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