[aprssig] Shack backup power

Keith VE7GDH ve7gdh at rac.ca
Sat Jun 4 21:25:16 EDT 2011

Lee  K9WRU wrote...

> When I installed my automatic generator backup system I immediately
> talked to the foreman of the maintenance crew that serves my area. I
> told him that while I had a proper transfer switch (to disconnect me
> from the "grid" when my generator operates since there is an obvious
> chance for me to power the utility lines while they might be serviced--
> a very serious safety and legal issue) I still felt that there was always
> a chance that I might accidentally attempt to supply power to their lines.

If you have a properly wired transfer switch, it would be impossible
to feed to power out to the line. The transfer switch is like a DPDT
switch. Your panel is either connected to the line or your generator. 
The generator is never connected to the line.

In the case of generator haywired into the house wiring, there is a very
real possibility of human error and feeding power out to the line.

Grid-tie inverters are safe because they shut down if they don't see 
power coming from the line.

73 es cul - Keith VE7GDH
"I may be lost, but I know exactly where I am!"

More information about the aprssig mailing list