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The Indian locomotive class WAG-6B/C is a class of 25 kV AC electric locomotives that was developed in the 1988 by Hitachi for Indian Railways. The model name stands for broad gauge (W), AC Current (A), Goods (G) engine, 6th generation (6) Second/Third variant (B/C). They entered service in 1988. A total of 12 WAG-6 (6 B variant and 6 C variant) were built at Hitachi, Japan between 1987 and 1988. they along with WAG-6A were the most powerful locomotives in India until the arrival of the WAG-9 class.

Indian locomotive class WAG–6
VSKP based WAG-6C locos at Koraput.
Type and origin Power type Electric Designer Hitachi Builder Hitachi Order number 85/RSF/459/1/(LT-33) Build date 1988 Total produced WAG-6B:6 WAG-6C:6
Specifications Configuration: ​  • UIC WAG-6B:Bo'Bo'Bo' WAG-6C:Co'Co  • Commonwealth WAG-6B:Bo-Bo-Bo WAG-6C:Co-Co Gauge 5 ft 6 in (1,676 mm) Bogies 2 axle double stage field excitation Wheel diameter New: 1,140 mm (3 ft 9 in) Half-worn: 1,102 mm (3 ft 7+1⁄2 in) Full-worn:1,065 mm (3 ft 6 in) Wheelbase WAG-6B:2,200 mm (7 ft 3 in) WAG-6C:2,800 mm (9 ft 2 in) Length: ​  • Over beams 20,940 mm (68 ft 8 in)  • Body 19,640 mm (64 ft 5 in) Width 3,000 mm (9 ft 10 in) Height 4,235 mm (13 ft 11 in) Frame type 2 axle double stage field excitation Axle load 20.5 tonnes (20.2 long tons; 22.6 short tons) ±2% Loco weight 123 tonnes (121 long tons; 136 short tons) ±1% Sandbox cap. 40L Power supply 110 V DC Electric system/s 25 kV 50 Hz AC Overhead Current pickup(s) pantograph Traction motors WAG-6B:HS-15556-OIR WAG-6C:HS-15256-UIR MU working 2 units Loco brake Air, Dynamic braking Train brakes Air Compressor 1,580 L (348 imp gal; 417 US gal) Safety systems Slip control, Over voltage relay, No volt relay, Earth fault relay, Low pressure governor, Train parting alarms, and Brake cylinder cutoff valve
Performance figures Maximum speed 100 km/h (62 mph) Power output: ​  • Starting Max:6,200 hp (4,620 kW)  • 1 hour Max:6,110 hp (4,560 kW)  • Continuous Max:6,050 hp (4,510 kW) Tractive effort: ​  • Starting 45,000 kgf (440 kN)  • 1 hour 32,000 kgf (310 kN)  • Continuous 32,000 kgf (310 kN) Factor of adh. 0.25
Career Operators Indian Railways Numbers WAG-6B:26010-26015 WAG-6C:26020-26025 Locale Kothavalasa–Kirandul line Delivered December 1987 ( First unit) January 1988 (remaining 5) First run 1988 Preserved 1 earmarked from each variant Scrapped From 2007 to 2015 Current owner Indian Railways Disposition A few still in service

These locomotives are still few in service for shunting and departmental duties with 1 unit from each variant are earmarked for preservation.

History

The history of WAG-6A begins in early 1980s with the aim of addressing the shortcomings of the previous WAG-1, WAG-2, WAG-3, WAG-4 and WAG-5 classes and remove steam locomotives from IR by a target date of 1990.[1] The WAG-5 were a great successes but these locomotives were based on 1960s technology and fast became underpowered for the expanding Indian railways. So Indian Railways decided to look for a new locomotive.[2] At that time (1980s) Thyristor controller was vastly used by locomotive in many European rail networks while 3 Phase AC technology was still in its infancy. So the ministry of railways floated a tender for a 6000HP locomotive with Thyristor control. The following responses were received:

• Hitachi submitted their model with 6000 hp with Bo-Bo-Bo bogies and Thyristor chopper control
• Hitachi also submitted their model with 6000 hp with Co-Co- bogies and Thyristor chopper control
• ASEA submitted their model with 6000 hp with Bo-Bo-Bo bogies and Thyristor chopper control.

Each company submitted their prototypes and Indian Railways designated these prototypes as the WAG-6B class WAG-6C class and WAG-6A class respectively.[3] IR ordered 6 of each class and these were delivered in 1988.[4]

Specification( WAG 6B, WAG 6C )

• Builder: Hitachi
• Build dates:
  • WAG 6B, 1988
  • WAG 6C, 1988
• Wheel arrangement:
  • WAG 6B, Bo-Bo-Bo
  • WAG 6C, Co-Co
• Traction Motors:
  • (WAG-6B) Hitachi HS 15556-OIR, bogie mounted, force-ventilated, compound-wound, 3200 kg
  • (WAG-6C) Hitachi HS 15256-UIR, axle-hung nose-suspended, force-ventilated, compound-wound, 3650 kg.
• Transformer: (WAG-6B/C) Hitachi AFIC-MS, 6325 kVA.
• Thyristor controller:(WAG-6B/C) 32 CGOIDA thyristors each with 24 DSP2500A diodes. 2x720 A, 850 V.
• Pantographs: (WAG-6B/C) Two Faiveley LV2600

Locomotive shed

Zone	Name	Shed Code	Quantity
East Coast Railway	Visakhapatnam	VSKP	9
Total Locomotives Active as of 18-10-2021[5]			9

See also

• Indian Railways
• Rail transport in India#History
• Locomotives of India
• Rail transport in India

References

External links

• Specifications
• India railway fan club
• IR WAG-6 @ Trainspo
• IT Locomotive Numbers

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