I work in commercial electrical power. No they don't. Because they aren't required to. It's all about costs. So unless it's about known risks (read PRA), no they don't protect against it. You need to spend money where the risks happen.

Wish I had better news, but hey you protect against "real" risks, like LOOPs, trips, downed trees, lightning, regulators, and floods. Well I guess the quotes are unfair, these things happen often. So these are real things you want to mitigate. End of the world stuff, no one takes that seriously sadly.

Also, don't forget a lot of the protective relays are digital protective relays. So even if you have them, well they might not work in This case. So aside from the digital PRs being "better" companies still sell them and few sell the older SD models, so we end up replacing the old solid state relays with digital drop in ones.

So even if you have a PR it might not work in this case. And frankly few people in the industry, or with the regulators, takes a geostorm seriously in commercial power, even though they should.