Comment by Joel_Mckay

12 hours ago

We used those Tripp Lite LC1200 to knock down the noise floor (14dB) on remote equipment.

These line-conditioners actually perform well given the cost, but never buy used surge-arresters given the finite spike hit-count. Best of luck =3

These devices are basically autotransformers. So they reduce the noise by providing inductive filtering. But they don't really protect against strong surges by themselves.

So Tripp Lite uses a regular varistor for that, just like any other surge protector. In Europe you'd be far better off buying a voltage relay and adding it to your electrical panel, but it's not usually possible with the non-modular US electrical panels.