Fusing
Fusing
(OP)
I am in a debate concerning fusing for a distribution system as far as wire and padmount transformers are concerned. There are two schools of thought here. One says to fuse to protect the wire and rely on the bayonet fuses within the padmount transformer, the other says to fuse to protect the padmount transformer, while being aware of the capacity of the wire installed(primary).
I'd like the opinion from those in this forum.
Thank you.
I'd like the opinion from those in this forum.
Thank you.






RE: Fusing
The transformer fuse will protect the transformer. The line fuse needs to protect the wire, but this is normally not a problem. The line fuse needs to be small enough to coordinate with upstream fuses, reclosers, or breakers.
RE: Fusing
I agree it the line fuse serves other loads, you'd rather have the bayonet fuses go first, just to minimize the outage. This assumes that all your padmount xfmrs have internal fusing. Many do not.
RE: Fusing
Bill
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"Why not the best?"
Jimmy Carter
RE: Fusing