Had 2 pool pumps burn the wiring recently and while they are cheap to rewire at 2200, it's a nuisance to be connecting disconnecting them.

If it is local electric fluctuations causing the problem is there a simple solution like a low electric power cut of device?

I guess a second less automated solution is to switch it on by hand 3 days a week 10 hours a time during heavy rainfall ect.

It occurs to me as well could too many houses be sharing the same outside transformer or is that ridiculous .

i spent a small fortune on burned pump and aircon starter relays because of low voltage. but motor rewiring was never required.

not sure whether cut off devices are available over the counter. i had one custom built for the whole house (3-phase) connection. not exactly cheap (31,000 Baht) but within 6 years of usage it saved a multiple of it's cost (7 pumps / 19 aircon units).