Hi Adam,
I had the same problem a few weeks ago.
Dieter Doepfer said "I'd recommend to use a (time lag) fuse with 400
or 500mA. As mentioned above you are still on the safe side with this
value."

As the 400 mA was still blowin'up, I tried the 500mA timelag and it's
ok now. Thoses kind of problems are really frustrating, I still have a
kind of trauma that scares me when I power up the system ! That would
be great to know what causes this issue; i don't think it comes from
the system's PSU itself but more from the electric environment ...
Anyway, I'll always bring some fuses with my A-100 wherever I play on
it as you never know what can happen in the power strips.
Best,
Max.