Welcome :) I also posted many other Nagpur videos : ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-6_ZDCvoVugM.html ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-dg5riP2ELtc.html ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-UizeU6MEDYA.html .
The electrified triple, quadruple and doubled lines is the Vijayawada Nagpur main line which criss-cross in this route. In some section from Kazipet to Nagpur we can see third line operational.