Fuses in general

My glider has multiple batteries with a switch to change between them
during flight. To, hopefully, eliminate loss of logger data during the
brief interruption of power during the switching process there is a large
capacitor to ensure continuity of supply to selected instruments during
switching. Although there is a resistor to limit the inrush current to
the capacitor this type of circuit needs a slow-blow fuse. (Factory wired
in last two years.)

This looks like a major clue that changes everything. (Well, almost
everything.)

My ASG29 also has two main batteries and a dial switch on the panel
that selects which battery is providing power to all of the
instruments. I wonder if the transition from B1 to B2 is popping the
(fast-blow) fuse on the back of the B40. And it would explain why
there was a T500L250V fuse in the panel fuse holder; I understand that
the "T" means slow-blow ("T"imed?), where an "F" would indicate fast-
blow.

2NO

On Dec 11, 9:00*am, Tuno wrote:
I wonder if the transition from B1 to B2 is popping the
(fast-blow) fuse on the back of the B40.


I have the same factory standard rotary power switch and an unmodifed
B40 that is always left on and selected to external power. My B40
fuse has never blown. (There are no external capacitors in my glider
nor do I need any).


Andy