Indian locomotive class WAP-7

The WAP-7 is largely used by most regional zones of Indian Railways. As of October 2021, all of these are fitted with H-type transition couplers which are compatible with both screw coupling and centre-buffer coupling. In February 2017, Banaras Locomotive Works built their first WAP 7 class locomotive. In 2019, a variant of the WAP-7, designated the WAP-7HS, was introduced for higher speeds. The WAP-7HS has a max speed of , and is capable of hauling a 24-car train at as opposed to the of the original. Indian Railways plans to use the WAP-7HS for Shatabdi, Rajdhani, and Duronto express trains. However, as of September 2022, it has not been confirmed if any others have been built, and the single completed WAP-7HS has remained restricted to operation. In 2025, a variant of the WAP-7, designated the WAP-7AD, was introduced with an aerodynamic design. The WAP-7AD has a maximum speed of , and is capable of hauling a 24-car train at , as opposed to the of the original. Indian Railways plans to use the WAP-7AD for Amrit Bharat Express and other Express trains. The first WAP-7AD 37873 entered service on September, 2025 hauling 12284 Ernakulam Duronto express. A pair of WAP-7AD, painted with Amrit Bharat livery are currently parked at ICF, Chennai waiting for rake and route allotment. ==Head-on Generation (HOG)==

Many locomotives of this class are fitted with head-on generation (HOG), eliminating the need to have separate End on Generation (EOG) sets or DG (Diesel Generator) sets for supplying power to the train and thus resulting in significant savings on maintenance and running costs. The HOG 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. == Train Services ==

The WAP-7 locomotive pulls 90% LHB coaches in 2020s and 10% ICF coaches • Rajya Rani Express (both ICF and LHB) • Rajdhani Express (both ICF and LHB) • Bagmati Express (both LHB and ICF) • Sapthagiri Express (ICF) • Shatabdi Express (LHB) • Taj Express (LHB) • Kalka Mail aka Netaji Express (both ICF and LHB) • Coromandel Express (LHB) • Vishwamanava Express (both LHB and ICF) • Garib Rath Express (both ICF and LHB) • Double Decker Express (LHB) • Mahamana Express (both ICF and LHB) • Andhra Pradesh Express (old) (ICF) • Kanchanjunga Express (both ICF and LHB) • Uttar Banga Express (both ICF and LHB) • Duronto Express (both ICF and LHB) • Kaziranga Express (both ICF and LHB) • Karnataka Express (both ICF and LHB) • Jan Shatabdi Express (both ICF and LHB) • Amrit Bharat Express (LHB without push-pull configuration for first time in 2026) • Vananchal Express (both ICF and LHB) • Yuva Express (both ICF and LHB) • Antyodaya Express (LHB) • Wodeyar Express (LHB) • Vivek Express (LHB) • Humsafar Express (LHB) • Venad Express (both LHB and ICF) == Locomotive sheds ==