São Paulo Metro G stock

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G stock
A G14 train close to Tamanduateí station
In service2009–present
ManufacturerAlstom
Built atSão Paulo, Brazil
Constructed2007–2009
Entered service2009
Number built16
Number in service16
Formation6-car sets (A–B–B–B–B–A)
Fleet numbersG12–G28
Capacity2,046 (if 8 passengers/m²)
OperatorsSão Paulo Metro
Depots
  • Itaquera
  • Belém
  • Jabaquara
Lines served
Specifications
Car body constructionStainless steel
Train length130.5 m (428 ft 2 in)
Width3.1 m (10 ft 2 in)
Height3.62 m (11 ft 11 in)
Floor height1,113 mm (3 ft 7.8 in)
EntryLevel
Doors8 sets of side doors per car
Maximum speed90 km/h (56 mph)
Traction systemAlstom ONIX 172 MP IGBT–VVVF
Traction motors24 × Alstom 4EXA 1828 A 180 kW (240 hp) asynchronous 3-phase AC
Power output4,320 kW (5,790 hp)
Acceleration1.12 m/s2 (3.7 ft/s2)
Deceleration
  • 1.2 m/s2 (3.9 ft/s2) (service)
  • 1.5 m/s2 (4.9 ft/s2) (emergency)
HVACAir conditioning
Electric system(s)750 V DC third rail
Current collector(s)Contact shoe
UIC classificationBo′Bo′+Bo′Bo′+Bo′Bo′+Bo′Bo′+Bo′Bo′+Bo′Bo′
BogiesHard "H"
Braking system(s)
  • Regenerative and Rheostatic (in stations)
  • Pneumatic (friction)
Coupling systemN2 type (A cars)
Track gauge1,600 mm (5 ft 3 in)

The São Paulo Metro G stock is a class of electric multiple units built between 2007 and 2009 by Alstom to operate on Line 2-Green.

History[edit]

Project and construction[edit]

With the expansion of the metro network, emerged a necessity to expand its rolling stock. In 1991, the São Paulo Metropolitan Company published the bid n° 00800310 for the acquisition of 67 trains of 6 cars each, divided as follows:[1]

  • Allotment I – 45 trains for Vila Madalena–Vila Prudente Line
  • Allotment II – 22 trains, with 16 to complement the Line 3 fleet and 6 for the Itaquera–Guianases expansion

In 2007, the São Paulo Metropolitan Company made a 15% additive on the Allotment II contract. Until then, 11 trains of this contract were delivered, being name E stock. This contract change created a legal controversy. The trains were built in Alstom factory, located in the Lapa district in São Paulo and delivered in 2009. During the project phase, the adoption of air conditioning system reduced the internal height of the trains, gaining controversy in the press.[2]

Service[edit]

The first train was delivered on 28 March 2009 in Alto do Ipiranga station.[3] Sometime later, a failure in the wheels axles was found, which could cause an improper longitudinal movement on the axle. This movement could cause a derailment. Due to this, all of the G stock was recalled for tests and repairs. Later, it was found that IESA, Alstom's sub-supplier, pressed the wheels on the axles with a damaged hydraulic press.[4][5]

Controversies[edit]

To expand its fleet, the Metropolitan Company used in 2007 the 1992 contract to acquire 16 more trains (a 15% additive compared to the original contract). Therefore, new Alstom trains were acquired, being named the G stock. This legal maneuver, however, was pleaded guilty by the State Court of Accounts of São Paulo in November 2017 because, according to the court, the maximum expire date of the contracts could not be over 5 years, and this bid expired in 1997.[6]

See also[edit]

References[edit]

  1. ^ Companhia do Metropolitano de São Paulo (31 December 1991). "Concorrência n° 00800310". Imprensa Oficial (in Brazilian Portuguese). Diário Oficial do Estado de São Paulo: 10. Retrieved 3 August 2023.
  2. ^ Barretto Briso, Caio (18 September 2009). "Metrô trens novos são até dezessete centímetros mais baixos". Veja São Paulo (in Brazilian Portuguese). Retrieved 3 August 2023.
  3. ^ "Novo trem do Metrô de SP entra em operação". Associação Brasileira da Indústria Ferroviária (in Brazilian Portuguese). 31 March 2009. Archived from the original on 14 April 2019. Retrieved 3 August 2023.
  4. ^ Machado, Renato (10 October 2009). "Trens novos do Metrô passam por troca de eixo para evitar acidente". Estadão (in Brazilian Portuguese). Retrieved 3 August 2023.
  5. ^ "Trens novos do Metrô passam por troca de eixo para evitar acidente". Sindicato dos Metroviários e Metroviárias de São Paulo (in Brazilian Portuguese). 13 October 2009. Retrieved 3 August 2023.
  6. ^ Pelegi, Alexandre (27 January 2018). "TCE reafirma: compra de 16 trens da Alstom feita pelo Metrô de SP foi irregular". Diário do Transporte (in Brazilian Portuguese). Retrieved 3 August 2023.

External links[edit]

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