On 28/02/2021 18:40, alan_m wrote:
On 28/02/2021 17:27, Michael Chare wrote:
Does anyone have any recommedations for Surge Protection Devices which
are suitable for use where they can't be fitted in a modern consumer
unit?

How useful are SPDs where all the local wiring is under ground, but
some of the 11KV upstream of the local transformer is overhead?

I was surprised to discover that they are fitted in parallel with a
consumer rather before and in series.



It does seem strange, safety wise, that what looks like a big red
isolation switch may not actually isolate the consumer unit.

https://www.tlc-direct.co.uk/Technic..._Datasheet.pdf


Yes I think the main switch just isolates the surge protector, it does
not stop power going to the Surge Protector.

If the Surge Protector stays closed the company fuse will blow. :-(



--
Michael Chare