Shed power trip alarm

[SPECIAL LOCATION]

To the OP..
Just need to clarify: Is the circuit breaker for power in the shed part of a small shed CU...?
Or is it an MCB/RCBO part of the main house CU?

If it is part of the House CU then it would be much easier to create an audible alarm solution if that breaker has tripped off.

 

[binky]

I had a plug in the house that alarmed when the house power went out (which told me about the shed), so it's a shame there isn't something like that over long distances. I would have thought there's something for, say, sick people for when support machines fail?

there probably is, it's just finding it. Might be worth looking at tropical fish gear - cold tank = dead fish.