Fusible Loop on Pumps

Regarding installation on fusible loop around process pumps and motors, how close should the fusible loop be around the pumps?

I saw an installation that has fusible loops plugs pointed directly at pump shafts where the process temperatures and the heat from the shaft could cause the plug to fail.

Looking at the installation I personally think this installation is wrong and is not a proper but would greatly appreciate any help from anyone on this forum with pictures and guidance on how a fusible loop can be installed and how far should a plug be from the system that it was designed to protect.

I will try add some pictures soon.