Phil Allison wrote:
Cydrome Leader wrote:



My question is why is on the output of the transformer. Is the input
fused at all?


** The two on/off switch incorporate circuit breakers,
but the trannys are very large and the low voltage windings
need protecting against an overload or short that would not
trip the breakers.


I've been thinking about this and can only conclude the fusible links are
to protect against further damage from someobdy recycling the input
breaker on a permanent fault.


** No, the breaker/switch would never react to a fault in the low voltage supply.

You're right. I re-read and saw it's for the +/- 15 rails. Still not
really sure why a fuse there would not suffice though. The parts did their
job so they did work as designed.

doesn't really explain what the breaker
is protecting against though.



** A major fault of course - one that would burn the transformer.

yup.