The Indian locomotive class WAG-7 is a class of 25 kV AC electric locomotives that was developed in 1990 by Chittaranjan Locomotive Works for Indian Railways. The model name stands for broad gauge (W), alternating current (A), goods traffic (G) engine, 7th generation (7). They entered service in 1992. A total of 1970 WAG-7 were built at CLW and BHEL between 1990 and 2015, which made them the most numerous class of mainline electric locomotive till its successor the WAG-9.

Bharat Heavy Electricals Limited (BHEL) is an Indian central public sector undertaking and the largest government-owned power generation equipment manufacturer. It is owned by the Government of India, with administrative control by the Ministry of Heavy Industries. Established in 1956 with the help of Soviet technology, BHEL is based in New Delhi.