Indian locomotive class WAG-12

The Indian locomotive class WAG-12B is a class of 25 kV AC electric locomotives that was developed in 2017 by Alstom with technological collaboration with Indian Railways. The model name stands for wide gauge(W), Alternating Current (A), Goods traffic (G) locomotive-12 . They entered trial service in 2019. A total of 370 WAG-12B have been built at Electric Locomotive Factory, Madhepura, Bihar, India.

WAG-12B
Saharanpur based WAG-12B at Bharatnagar.
Type and origin
Power typeElectric
DesignerAlstom, RDSO
BuilderELF Madhepura
ModelRDSO based design
Build date2017 (2017) - present
Total produced400 as of April 2024
Specifications
Configuration:
  AARB-B+B-B
  UICBo′Bo′+Bo′Bo′
  CommonwealthBo-Bo+Bo-Bo
Gauge5 ft 6 in (1,676 mm) Broad Gauge
Wheel diameter1,250 mm (4 ft 1 in)
Wheelbase:
  Bogie2,600 mm (8 ft 6 in)
Pivot centres10,200 mm (33 ft 6 in)
Panto shoes9,000 mm (29 ft 6 in)
Length:
  Over couplers38,400 mm (126 ft 0 in)
Width3,215 mm (10 ft 7 in)
Height:
  Pantograph4,245 mm (13 ft 11 in)
Axle load22.5t (upgradable to 25t)
Loco weight180t (upgradable to 200t)
Electric system/s25 kV 50 Hz AC AC
Current pickup(s)Pantograph OHE
Traction motors6FRA-4576D, Asynchronous, Forced Cooled, Nose Suspended
  Continuous1125 kW @ 1750 rpm
Gear ratio110:23
MU working2 units
Loco brakeAir, Regenerative
Train brakesAir
CouplersCBC coupler, Buffers and chain coupler
Performance figures
Maximum speed100 km/h (62 mph)
(Upgradable to 120 Km/h)
Power output:
  Continuous9,000 kW (12,000 hp)
Tractive effort:
  Starting705 kN (158,490 lbf)
(Upgradable to 785 kN)
Brakeforce634.5 kN (142,641 lbf)
Career
OperatorsIndian Railways
Numbers60001+ onwards
LocaleIndia
Delivered11 October 2017
First run19 May 2020

With a power output of 12,000 hp, the WAG 12 is twice as powerful as its immediate predecessor, WAG-9, making it one of the most powerful freight locomotives in the world. The locomotive is being developed for deployment on the Dedicated Freight Corridors, where it will be used to haul freight trains weighing more than 6,000 tonnes (5,900 long tons; 6,600 short tons) at speeds of 100 km/h (62 mph) to 120 km/h (75 mph), essentially doubling the average speed of freight trains in the sector.

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