The Indian locomotive class WAM-1 was a class of 25 kV AC electric locomotives that was developed in the late 1950s by the Groupement 50 Hz for Indian Railways. The model name stands for broad gauge (W), AC Current (A), Mixed traffic (M) locomotive, 1st generation (1). They entered service in 1960, thus making them the first AC electric locomotives to be in service in India. A total of 100 WAM-1s were built by the European consortium between 1959 and 1961, which made them the most numerous class of mainline electric locomotive until the WAG-1.