Companion CLF with Cutouts Practices
Companion CLF with Cutouts Practices
(OP)
Our utility is looking at its practice of installing a CLF with a NEMA rated link (K) Cutout at 12.47KV O/H. We install them wherever the fault current exceeds 5KA sym. Our standards say our lowest rated cutouts are rated 6.2KA sym. Hearsay notes we install them due to dist. tranformer withstand but we have no documentation to support this. An IEEE T&D survey states utilites use them for both cases without any information on levels of transformer withstand ratings.
What is your utility practice?
What is your utility practice?






RE: Companion CLF with Cutouts Practices
Rafiq Bulsara
http://www.srengineersct.com
RE: Companion CLF with Cutouts Practices
I've seen pole mount transformers that exploded, showering oil everywhere, due to too much energy.
CL fuse use is very common in padmounts where an event could be catastrophic.
Jim T