Complex sentence: As the route is fully electrified, a or based WAP-4 locomotive powers the train upto later a based WAP-4 locomotive takes reversal direction and pulls train upto its destination.
Split into simpler sentences: As the route is fully electrified, an or based WAP-4 locomotive powers the train up to. Later, an based WAP-4 locomotive takes the reversed direction and pulls the train to its destination.