In the morning time it is bottle neck for secunderabad station to accommodate the trains. So the timings of this train is changed by increasing its journey time by 45 minutes. Eventhough it is having only 4 stops from VSKP to SC, the railway authorities of SCR has taken this decision to delay this train by 45 minutes.
But why only this train is the question?
My guess would be this is the only train arriving at that time that belongs to ECoR.