UK Substation LV Feeder Pillar Fuse Rating

danieleither · May 13, 2020

On a commercial 200A TP&N supply, what rating would the substation feeder pillar fuses be? Would they typically also be 200A or a higher rating?
Source URL: Electrical Forum - https://www.electriciansforums.net/forums/electrical-forum.15/

R-fur · May 13, 2020

Varies from DNO to DNO but usually 400A, is it a direct feed from a substation or is it teed off a distributor?

danieleither · May 13, 2020

R-fur said:
Varies from DNO to DNO but usually 400A, is it a direct feed from a substation or is it teed off a distributor?

The supply is a direct feed from the substation, I believe installed around 1990

davesparks · May 13, 2020

danieleither said:
The supply is a direct feed from the substation, I believe installed around 1990

To be sure you will have to ask the DNO (i assume its a DNO supply and not a private substation?)
It may be fused at the standard 400A with 200A fuses in the cutout, or it may be fused at 200A with solid links in the cutout, or something else.

danieleither · May 13, 2020

davesparks said:
To be sure you will have to ask the DNO (i assume its a DNO supply and not a private substation?)
It may be fused at the standard 400A with 200A fuses in the cutout, or it may be fused at 200A with solid links in the cutout, or something else.

Yes it is as DNO supply, and there are 200a fuses in the cutout