devices for surge protection

MEXICOWANDERER wrote:
If a 12.5KV line should drop upon a 3KV line no device I know of is going to protect a service drop. >KV relay switches are used in transmission not distribution networks. Let's avoid lumping all forms of disturbances into a grand mishmash.

Appreciate that some claim experience and knowledge - that contradicts over 100 years of science and experience.

A 33,000 volt wire fell onto local distribution. Plastic glass from electric meters exploded 30 feet from their pans. (I never saw that before or again.) Many had destroyed protectors and damaged appliances that they assumed would be protected. At least one had multiple destroyed circuit breakers.

But my friend knows someone who has done this stuff for decades. His meter also exploded from its pan. But he had no damage even to MOVs in his 'whole house' protector. He installed and properly earthed what an engineer recommends.

All homeowners psid to replace damaged meter pans. Electric company is not responsible. Another should have known that.

Why does one *know* damage from a dropped 12.5Kv line cannot be averted? Wild speculation with deceptive numbers and near zero experience does not constitute knowledge.

Best protection from a typical campground surge is a Progressive or something equivalent. Best protection from a rare campground surge (ie a microsecond transient such as lightning) requires a Progressive type device located (low impedance) as close as possible to a pole and earth ground. Since MOVs protect from that type of surge only when connected low impedance (as short as possible) to earth.

One knows protection from 12.5Kv is imppossible because he did not do this stuff. Different 'surges' require different solutions. For surges typically found in campgrounds, a Progrssive was always highly recommended. To protect RVs from surges created by lightning requires a protector be attached at the pole - as close to earth ground as possible.