Indian locomotive class WAP-1
The Indian locomotive class WAP-1 is a class of 25 kV AC electric locomotives that was developed in 1978 by Chittaranjan Locomotive Works for Indian Railways. The model name stands for broad gauge (W), AC Current (A), Passenger traffic (P) engine, 1st generation (1). They entered service in late 1979. A total of 65 WAP-1 were built at CLW between 1979 and 1996, which made them the most numerous class of mainline electric passenger locomotive until its successor, the WAP-4.
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Arakkonam (AJJ) based WAP 1 Loco | |||||||||||||||||||||||||||||||||||||
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The WAP-1 is India's first dedicated electric passenger locomotive of Indian Railways having served both passenger and freight trains for over 40 years. This class provided the basic design for a number of other locomotives like WAP-3 and WAP-4 models. However, with the advent of new 3-phase locomotives like WAP-5 and WAP-7, the WAP-1 locomotives were relegated to hauling smaller express and passenger trains and now the aging fleet the WAP-1 locomotives are being slowly withdrawn from mainline duties and scrapped.
As of January 2020, 55 locomotives still retain "operational status" on the mainline as WAP-1, with further examples having been converted to WAP-4.
Development
Background
In the early 1980s, Indian Railways began considering developing a passenger version of its WAM-4 class...[1] Designed for both passenger and goods trains the WAM-4 was one of the most successful locomotives of the 1967s and a mainstay of the Indian Railways.
Five prototype locomotives of this type were ordered from CLW to the design of RDSO. The first prototype locomotive was put into service in 1981.[2] They were first used on the Howrah Rajdhani Express.[3]
The locomotive is powered by six axle-hungs, nose-suspended forced ventilated type DC traction motors. Speed control is achieved by grouping in 2S-3P combination and by field weakening of the motor. It utilises a silicon rectifier for conversion of AC power into DC.[lower-roman 1][4]
They are being converted to make them suitable for multiple operation. Compressed air brake for the locomotives and vacuum brake for the train are provided. The brake system is being modified to make them suitable for dual brakes.
The WAP-1 provided the basis for the WAP-4.
Variants
The WAP-3 is the upgraded variant of the WAP-1 with better top speed. All units of this class were WAP-1 units already in service. The first locomotive converted was a WAP-1 '22005' named Jawahar. Subsequently 8 more WAP-1 were converted, But since the class were not a great success and had performance issues these were converted back to WAP-1.
Image gallery
- 2925 Paschim Express with a WAP-1
- TKD WAP1 22006 RajHans at Katihar
- WAP-1
- AJJ WAP-1 with WAP-4 livery hauls Trivandrum bound Guwahati Express
- AJJ WAP-1 in full WAP-4 livery.
- 12497 (NDLS-ASR) Shaan-e-Punjab Express with a WAP-1
- WAP1 22076 Aastha of GZB with Agra bound ICE at LJN
- WAP-1 with Raj Livery at Delhi
Locomotive sheds
Zone | Name | Shed Code | Quantity |
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Northern Railway | Tughlakabad | TKD(D) | 31 |
Southern Railway | Erode | ED(D) | 28 |
Total Locomotives Active as of 01-11-2020[5] | 59 |
See also
References
- The Great Indian Peninsula Railway EA/1 class of 1928 may disagree.
- https://rdso.indianrailways.gov.in/works/uploads/File/raj-icf17.pdf
- "[IRFCA] A Brief History of Railway Electrification in India". www.irfca.org. Retrieved June 19, 2019.
- https://rdso.indianrailways.gov.in/works/uploads/File/raj-icf17.pdf
- https://24coaches.com/electric-locomotive-roster-the-wap-series/
- "e-Locos".
External links
Wikimedia Commons has media related to Indian locomotive class WAP1. |