It was India's first AC electric locomotive. Davidson made a model electric locomotive in 1837. It was premiere of the newest Polish electric locomotive EP09. The British Rail Class 40 is a type of British railway diesel electric locomotive. WAG 7 is the name of a type of electric locomotive used in India. The WAGR operated a large number of unique steam, diesel and electric locomotive classes. Line 6 uses Type A cars manufactured by CRRC Zhuzhou Electric Locomotive. The Class 89 was a prototype design for an electric locomotive. Thus it was also the earliest battery electric locomotive. Gatimaan Express is regularly hauled by WAP 5 electric locomotive from Ghaziabad Loco shed. Such locomotives are used where a diesel or conventional electric locomotive would be unsuitable. Line 4 cars are Type B and manufactured by CRRC Zhuzhou Electric Locomotive. GE built its first electric locomotive prototype in 1895. An electric locomotive is a locomotive powered only by electricity. Such locomotives are used where a conventional diesel or electric locomotive would be unsuitable.