cumulative time

I'd like to import time (hours, mintues and seconds) into Power BI, but I get an error; Expression.Error: We couldn't parse the input provided as a Time value.

The times are in the following format 1:02:15 (1 hour, 2 miutes 15 seconds)

I do not wan't to interpret the times as times of the day, but rather as just time spent, and I would like to sume those times.

This does not seem to be an easy task in Power BI? Everything I try fails,...