In case of train running late by more than three hours & the passenger not performing journey on this account ,full refund is permitted subject to the condition that the ticket is surrendered/TDR obtained in case of I-ticket, if is in E-ticket customer should file online/mail to IRCTC within the prescribed time limits which are as under-.
Ticket distance Prescribed time
...
more... Upto 200 Kms 3 Hrs
201- 500 Kms 6 Hrs
More than 500 Kms 12 Hrs