> Hi Simon,
>
> You will need to use the fuse rating that is specified for the 110V
> PSU2 not the 240V PSU2 since you are using a step down transformer
> and the unit is actually operating on 110V. You can safely use a
> slightly higher value than that which is specified but I wouldn't go
> too high. I doubt that you will find 110V rated fuses anywhere in
> Australia though and I don't know that you can substitute the 240V
> rated fuses for the 110V ones. Perhaps Dieter can offer further
> advice here otherwise you might try looking at some of the overseas
> electronics suppliers like digikey to have the 110V rated ones
> shipped to you.
>
> Cheers,
> Adam-V

The PSU does not "know" if the voltage comes from the normal mains or from a
step down/up transformer. The voltage that is used to run the PSU (i.e. the
voltage at the mains connector of the A-100 frame) is the crucial voltage
value.

The voltage spec of a fuse is the max. voltage for the fuse. It is not
necessary that the voltage specified on the fuse is the same as the voltage
that is used. The voltage specified on the fuse has to be the same or more
than the actual mains voltage (i.e. a 240V fuse can be used even for 110 or
115V, but a 110 V cannot be used with 230 V mains voltage).

Different responses for fuses is - as far a I know a standard - all over the
world as you need different responses for different applications. The lag
time is specified by a character normally added before of after the current
value:"F" = fast (German: flink), "M" = medium (German: mittel), "T" = time
lag (German: traege). Example: T800mA or 800mAT

I'm not in the office next week. Consequently I cannot answer question from
the group during this time.

Have a nice weekend
Dieter Doepfer