page_title: Indian locomotive class WAP-7
section_title: Head-on Generation (HOG)
hierarchical_section_title: Indian locomotive class WAP-7 / Head-on Generation (HOG)
caption_attribution_description: English: 02424 Dibrugarh Rajdhani COVID-19 Special approaching Katihar
context_page_description: The Indian locomotive class WAP-7 is a class of 25 kV AC electric locomotives that was developed in the 1999 by Chittaranjan Locomotive Works for Indian Railways. The model name stands for broad gauge, AC Current, Passenger traffic engine, 7th generation. They entered service in 2000. A total of 1086 WAP-7 have been built, with more units being built at CLW, Diesel Locomotive Works and Diesel-Loco Modernisation Works.
  The WAP-7 is one of the most successful locomotives of Indian Railways serving passenger trains for over 20 years. It is a passenger variant of the WAG 9 freight locomotive with a modified gear ratio to pull lighter loads at higher speeds. It is the most powerful passenger locomotive in the Indian Railways fleet, capable of hauling 24 coach trains at speeds 110–140 km/h.
context_section_description: A main feature of some locomotives of this class is that they eliminate the need to have separate End on Generation (EOG) sets or DG (Diesel Generator) sets for supplying power to the train resulting in significant savings on maintenance and running costs. This technology, called HOG or "Head On Generation", transfers electric power from the loco's pantograph to the coaches instead of EOG where a power car equipped with diesel generator capable of generating adequate power of 3-phase 50 Hz 415 V / 750 V AC (called 'head-end power') is provided at either end of the train rake to supply power.
caption: HOG WAP7 37293 GZB based with 02424 COVID19 Special arriving Katihar
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