Indian locomotive class WDP-3A

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WDP-3A
GOC based WDP-3A with passenger train
Type and origin Power type Diesel–electric Builder Banaras Locomotive Works (BLW) Patiala Locomotive Works (PLW) Serial number WDP-2-1 to WDP-2-44 Model ALCO DL560C variant Build date October 4, 1998, to February 1, 2001 Total produced 44 Rebuilder Patiala Locomotive Works (PLW), Patiala
Specifications Configuration: ​  • AAR Co-Co  • UIC Co′Co′ Gauge 1,676 mm (5 ft 6 in) Bogies Flexicoil Mark V fabricated bogies Wheel diameter 1,092 mm (3 ft 7 in) Wheelbase 12.834 m (42 ft 1+1⁄4 in) Length 18.62 m (61 ft 1+1⁄8 in) Width 2.964 m (9 ft 8+3⁄4 in) Height 4.185 m (13 ft 8+3⁄4 in) Axle load 17,500 kg (38,600 lb) Loco weight 117 t (115 long tons; 129 short tons) Fuel type Diesel Fuel capacity 5,000 L (1,100 imp gal; 1,300 US gal) Water cap. 4,000 L (880 imp gal; 1,100 US gal)[citation needed] Sandbox cap. 58 kg (128 lb) Prime mover ALCO 251-C RPM range 400-1050 rpm Engine type V16 Diesel engine Aspiration ABB VTC304-15 or Napier NA 295 IR turbocharger Traction motors Bharat Heavy Electricals TA 10102 CW (new), BHEL TG 10931 AZ (old) Cylinders 16 Cylinder size 228 mm × 266 mm (8.98 in × 10.47 in) bore x stroke Transmission Diesel electric MU working 2 Train brakes Air Safety systems Alternative brake system
Performance figures Maximum speed 160 km/h (99 mph) Power output 3,100 hp (2,312 kW) Tractive effort 30.45 t (30 long tons; 34 short tons)
Career Operators Indian Railways Numbers 15501-15544 Nicknames Toasters, Pushpak Locale Southern Railway (GOC) Northern Railway (TKD) Central Railway (KYN) First run 1998 Preserved 1 earmarked Scrapped 2021-present Disposition Active (withdrawals ongoing)

The Indian locomotive class WDP-3A, colloquially nicknamed the Toaster, is a class of diesel–electric locomotive that was developed in 1998 by Banaras Locomotive Works, Varanasi for Indian Railways. The model name stands for broad gauge (W), Diesel (D), Passenger traffic (P) locomotive with 3,100 horsepower (3A). The WDP-3A is a later classification of earlier WDP-2. They entered service in 1998. A total of 44 were built between 1998 and 2001.

They are the fastest ALCo based locomotive found in India with a top speed of 160 km/h, on par with the premier electric locomotives. The WDP-3A served IR for over 25 years. A significant number of these locomotives are still in use, both on mainline and departmental duties. As of June 2022, few of the locomotives still retain "operational status" on the mainline as WDP-3A, with further examples having been scrapped.