Question: 

Is it possible to download data from my Fluke 173x via a network connection ? 

Answer: 

Yes, this is possible, but only via Fluke Energy Analyze Plus software and within your local network. 
Fluke Energy Analyze can be downloaded from our support pages :

https://www.fluke.com/en-us/support/software-downloads/fluke-1732-1734-1736-1738-power-loggers

First setup the connection of the logger to the local network.
Then make a note of the assigned IP address of the logger. 
Start Energy Analyze and go to download data.
From Source list choose new/edit : 

Enter the IP address of the logger, leave Port unchanged and press Add. 
The link will now be added to the list of choices, see below:



Choose the entered IP address as source and Energy Analyze makes the connection and files are downloadable in the same manner as via USB : 

 

Mark the required file to download and download it.