38 KV fault current

[tommom]

A friend is designing a 300 kva unit substation, 34.5 KV primary. The available fault current is around 18,000 amps. However, he can't find a primary fuse which is rated higher than about 16,000 amps.

What are his options for protection of the transformer?

 

[stevenal]

S&C SMD-2C FOR 33.5 kA symmetrical.

 

[tommom]

Thanks, stevenal. Will see if we can use this in the app. All the distribution is underground, so it's possible this might not do the trick.