I got the new Victron grid meter a couple of days ago (VM-3P75CT) and have gone through the available documentation which suggests the requirement for a 500ma fuse in the neutral or a circuit breaker of equivelent rating. I've mounted the grid meter directly in the my main grid side distribution board (I have two boards, this one which is grid side and a second which is output side of my Multi RS just for info).

My main distribution board had a little spare space on a 35mm DIN rail so I've opted with mounting a small screw top DIN rail mount fuse holder for now. if I didn't use this then I was struggling to find any inline mains rated fuse holders, or for that matter a 500ma circuit breaker, definitely not one that I could use in my distribution board.

The questions(s) therefore:

1) Has anyone seen any inline fuse holders that would be suitable?

2) Are there any DIN rail mountable standard fuse holders that are suitable?

3) Are there any Circuit breakers that are suitable?

A related question, as I've mounted this in the main distribution board, I'm assuming the requirement for a specific isolator for the grid meter is not required as the board has it's own main isolator which should always be turned off before removing the cover and working on the unit anyway? I assume this makes sense?