convert input decimal to interval output

[Gabri11]

Hi everyone, I need to import an interval type field into a postgresql database. The origin is in decimal format.

An example:
source = 1.5 (one and a half hours)
output = 01:30:00 (1 hour : 30 minutes : 00 seconds)

How can I do using tmap? What kind of data should I set?
Thank you

[Gabri11]

nobody can help me?