Protective measures for fault protection on fused isolator

[jeffducati]

Hi all new isolator through 200amp bus bar section controlled by 200amp isolator and fused at origin at 400ampincomer no breakers very old system needs panel thats the hard bit they wont spend money and they work 6 days 20 hours a day.
so what would you put in the box headed protective measures for fault protection on test sheet,and dont say ADS wrong?

 

[somersetsparks]

Whats wrong?

 

[Guest55]

you have a choice of 4........

ads
reinforced insulation
electrical seperation
extra low voltage

you'll have to pick , we cant see the job.

 

[Guest55]

and 99% of the time its ads , especially for an installation in its entirety.

 

[Guest55]

fused at origin at 400ampincomer

so a fault will clear the 400a fuse ?
its still ADS even with no local overload protection.

 

[somersetsparks]

so a fault will clear the 400a fuse ?
its still ADS even with no local overload protection.

I assume he means he has taken an isolater from a busbar protected by 400A fuses?
I'd say ELV ;-)