The Full Form of WAP 7 is‍ Wide/broad Gauge AC Electric Passenger, Class 7.

The WAP 7 (Wide/broad Gauge AC Electric Passenger, Class 7) is a three-phase AC electric passenger locomotive developed by the Chittaranjan Locomotive Works. It is the most powerful passenger locomotive in the Indian Railways’ fleet. 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 capable of hauling 24 coach trains at speeds ranging between 110–140 km/h (68–87 mph), depending on the MPS (Maximum Permissible Speed) of the sector, and is now largely used by Northern Railways (NR), South Central Railways (SCR), Central Railways (CR), South East Central Railway Zone (SECR), Southern Railways (SR), South Eastern Railways (SER), West Central Railways (WCR), Eastern Railways (ER), Western Railway zone (WR) & North Eastern Railway zone (NER) among other zones. As of May 2019, there are 681 locomotives in service, all of which are fitted with tightlock couplers (for central buffer coupling) and chain link couplers. In February 2017, Diesel Locomotive Works built their first WAP 7 class locomotive