Yesterday, when the train passing through Madpur railway station(which is after KGP), the pantograph of the loco suddenly broke and fell down with electric wires. Power supply between KGP & PKU was blocked. After, some time, a diesel loco was brought from Panskura. The diesel loco hauled this train upto Panskura & at Panskura, loco was changed into electric. And then, it run with electric loco to HWH. Thats why late.