Glen, I am using an Alinco DM-430T, 30Amp, switching. It runs hot with 5 radios running,
digital messaging, ssb, and vhf/uhf FM transmitting.
I am ready to buy the Astron 35M. It has way better specs, and a crowbar circuit.
If the ac power goes off I have a large backup battery system.
What I want to accomplish is reducing the potential damage from AC line voltage
spikes when the power returns.
I keep thinking of a relay that would open if its primary were interupted
You asked about max amperage, so I just now keyed all the radios on high power, and
saw a drain of 25 amps, but the voltage dropped .3vdc, and the hf transceiver rebooted!