That bit has bothered me about the Hager (and some others), the connection is directly to the main switch, no local protection.
Some others dedicate one of the spaces for a MCB (45/50A) just for the SPD, but with others like Hager, you are wholly reliant upon the DNO fuse. In this case it was a 60A (now 80A).
So need to involve the DNO (I did have a suitable fuse btw, but not up to me to change it!)
Some others dedicate one of the spaces for a MCB (45/50A) just for the SPD, but with others like Hager, you are wholly reliant upon the DNO fuse. In this case it was a 60A (now 80A).
So need to involve the DNO (I did have a suitable fuse btw, but not up to me to change it!)