31617-WAG9i-LGD --- This marvel from Lallaguda was resting idly at Santragachi junction while framed by Somsubhra Das on 12th November 2015.

The WAG9i idicates that these locos are fitted with Insulated Gate Bipolar Transistor (IGBT) control. Two inverter assembled for each bogie, enabling per-axle isolation in the case of traction motor failure. If one traction motor fails, power supply to its axle gets cut-off leaving the loco with 5000hp on the other axles.