15kV Fuse
15kV Fuse
(OP)
Im trying to spec a 12.47kV load break switch with a 600A fuse, or close to it. Finding the 600A switch is easy but I cant seem to find a 600A fuse/fuse holder. Only 540A but requires 800A holder, what am I missing?
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
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RE: 15kV Fuse
Rafiq Bulsara
http://www.srengineersct.com
RE: 15kV Fuse
RE: 15kV Fuse
RE: 15kV Fuse
RE: 15kV Fuse
Utility
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Loadbreak/fuse
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Subsation#1 Substaion#2
RE: 15kV Fuse
Also 600A Fault Fiter electronic power fuses. See htt
You can't open the fuses under load, so you need a separate load-break switch.
RE: 15kV Fuse
If the utility has adequate fault protection why not just let them do the job. Then they are the ones buying those high dollar fuses. Hopefully you don't blow them often enough for it to be a problem anyway.
Alan
RE: 15kV Fuse
RE: 15kV Fuse
Now considering removing the requirement for the fuse however I'm not sure of any code requirements for me to protect that conductor once it enters the building..?
RE: 15kV Fuse
Sounds from the voltage that you are in the US? Code may well require protection once it does enter the building.
Don't do the high voltage non utility stuff but other guys here do.
Alan
RE: 15kV Fuse
RE: 15kV Fuse
Alan
RE: 15kV Fuse
What jghrist said. Parallel SM5's are feasible. You can only get the Fault-fiter in S&C switchgear (they don't sell it to other mfg's).
You might also consider vacuum fault interrupter gear such as Eaton MEP.
Alan
----
"It's always fun to do the impossible." - Walt Disney
RE: 15kV Fuse
The protection coordination should be reviewed as you may encounter problems coordinating with the local utilities upstream protection.
Where in Canada are you located?
RE: 15kV Fuse
RE: 15kV Fuse
Alan
RE: 15kV Fuse
RE: 15kV Fuse
RE: 15kV Fuse
RE: 15kV Fuse
RE: 15kV Fuse
Alan
RE: 15kV Fuse
Rafiq Bulsara
http://www.srengineersct.com
RE: 15kV Fuse
RE: 15kV Fuse
RE: 15kV Fuse
ht
S&C Fault-Fiter:
http://sa
Alan
----
"It's always fun to do the impossible." - Walt Disney
RE: 15kV Fuse
The 540A rating is really 600A (two fuses in parallel) derated by ten percent.
RE: 15kV Fuse
RE: 15kV Fuse
Alan
"The engineer's first problem in any design situation is to discover what the problem really is." Unk.
RE: 15kV Fuse
The price of the fuses gets rather expensive. I have seen eurpean DIN size fuses used frequently due to lower costs. Using a vacuum breaker with protection relay may not be that much more cost wise compared with a set of RBA-800's, mounting parts and a set of spare fuse links.
Like alehman said, consult with the eaton rep and local regulations and codes first.
RE: 15kV Fuse
htt
RE: 15kV Fuse