Does anyone have experience with setting up protection for circuits that are 120vac nominal, but could be accidentally exposed to 240vac if the wrong plug is used?
In this case the application is for a camper that recently experienced this exact problem when an outlet on a new building was mistakenly powered with 240vac, which fried the fuses on several 120vac camper appliances (fortunately, mostly an easy fix this time). For reference, the camper is rated at 120vac, 30 amps max draw.
I found several over-voltage protection modules that sound like they could work, but have 1 to 2 seconds of delay after powering-on before they would trigger.
It seems like that much delay would be too much, but I don't really know. Please let me know if you have any thoughts on this issue, or if there are better solutions.
There are faster options per the Wikipedia surge protection page: crowbar circuits, transient voltage suppression diodes and a few others, but they don't seem to be commonly available as a commercial product. I can solder something up if needed, but off-the-shelf seems safer.