Indian locomotive class WAG-1

The Indian locomotive class WAG-1 is a class of 25 kV AC electric locomotives that was imported from Europe in 1960s for Indian Railways. The model name stands for broad gauge (W), AC Current (A), Goods traffic (G) engine, 1st (1). A total of 112 WAG-1 locomotives were built by The European Group 50Hz Group/European Group/50 Cycles Group (consortium) between 1963 and 1966. They entered service in 1964.[1]

Indian locomotive class WAG-1
WAG1 20710 Bidhaan at NRM
Type and origin
Power typeElectric
BuilderKraus-Maffei, Krupp, SFAC, La Brugeoise & Nivelle (50 cycles European group)
Build date1963-1966
Total produced112
Specifications
Configuration:
​
 • AARB-B
 • UICB-B
Gauge5 ft 6 in (1,676 mm)
BogiesMonomotor B-B bogies
Wheel diameterNew:1,140 mm (3 ft 9 in)
Half worn: 1,120 mm (3 ft 8 in)
Full worn: 1,064 mm (3 ft 6 in)
Length14.600 m (47 ft 10 13⁄16 in)
Width3.109 m (10 ft 2 13⁄32 in)
Height4.165 m (13 ft 7 31⁄32 in)
Axle load18,640 kg (41,090 lb)
Loco weight74,000 kg (163,000 lb)
Electric system/s25 kV 50 Hz AC AC Overhead
Current pickup(s)pantograph
Traction motorsSiemens/ACEC/Alstom MG 710A (740hp, 1250V, 480A, 1000 rpm).Fully suspended, force- ventilated.
Loco brakeAir
Train brakesvacuum train brakes.
Performance figures
Maximum speed112 km/h (70 mph)
Power outputMAX:2930HP Continuous: 2,930 hp (2,185 kW)
Tractive effortStarting : 25,000 kgf (250 kN; 55,000 lbf)
Career
OperatorsIndian Railways
Numbers20700-20709 (Niv. / SFAC) 20710-20791 (CLW) 20849-20868 (Niv. / SFAC)
LocaleAll over India
DispositionRetired

The WAG-1 served both passenger and freight trains for over 40 years. As of January 2020, All locomotives have been removed from service all but one were scrapped.

History

Forty-two locomotives of this type were ordered from European Group. Five of these were completely assembled in Europe and the remaining were built at CLW. A repeat order was placed on for 20 locomotives in 1963. Further these locomotives were manufactured at CLW.The typical feature of these locomotive is the Monomotor bogies. This construction results in substantial saving in weight in traction equipment and gives better adhesion. The traction motors are force ventilated and are fully suspended type. These motors are permanently grouped in parallel and are controlled by tap changer and field weakening. This can be used for a multiple unit operation to a maximum of four locomotives.Compressed air brake for the loco and vacuum brake for the train are provided, in addition, these locomotives have been provided with regenerative braking. Few locomotives have been converted to dual brake system. They were in service until 2002 when all were scrapped. The first indigenously produced WAG-1 Bidhaan is preserved at the National Rail Museum, New Delhi.[2]

Variants
  • WAG-1S

Specification

Locomotive shed:
  • All the locomotives of this class has been withdrawn from service.
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See also

References
    1. https://www.irfca.org/faq/faq-specs.html#WAP-1 [IRFCA] Indian Railways FAQ: Diesel and Electric Locomotive Specifications
    2. https://www.irfca.org/faq/faq-loco2e.html#wap-1 [IRFCA] Indian Railways FAQ: Locomotives—Specific classes : AC Electric
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