The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!

Featured:
   

2017 NEC and Related
2017 NEC
Now Available!

   
Recent Posts
Calling all Non-US members!! (Non-US only)
by aussie240
Yesterday at 02:39 AM
Photo Upload Tutorial
by DanK
12/06/16 11:35 PM
Sprinklered equipment 26-008
by bigpapa
12/02/16 04:24 PM
On Delay Relay with Auto Reset
by Potseal
12/01/16 09:59 AM
Wow, that was close!
by jraef
11/28/16 07:06 PM
New in the Gallery:
12.5A through 0.75mm² flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 13
HotLine1 9
Texas_Ranger 8
sparkyinak 7
Trumpy 6
Who's Online
0 registered (), 238 Guests and 5 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#129225 - 11/18/04 02:09 PM k fuse selection
Alberto Santiago Offline
Junior Member

Registered: 08/06/04
Posts: 2
Loc: Tijuana, Baja California, Mexi...
it is a transfoermer of 1500 kva, 3 ph, 13200 volts primary, 480/277 volts secondary, %z=5.75, i calculated the size of fuse as follow:
nominal current on primary side= 65.6 A
size of fuse= 65.6 x 2.4 = 157.45 A
i select a 150 amperes fuse
am i right or wrong?
if i am wrong can somebody help me, how can i calculate a k fuse?.

Top
#129226 - 12/31/04 12:08 PM Re: k fuse selection
Alberto Santiago Offline
Junior Member

Registered: 08/06/04
Posts: 2
Loc: Tijuana, Baja California, Mexi...
thanks anyway

Top
#129227 - 12/31/04 05:13 PM Re: k fuse selection
Bjarney Offline
Moderator

Registered: 04/10/02
Posts: 2561
Loc: West-Southern Inner-Northeast ...
Alberto, I apologize for overlooking your original post.

Unfortunately, distribution-transformer fuse sizing is typically out of the scope of the E-C.net message board. I have very little experience with this, and it was with T (slow) and not K links.

There is some limited, very general manufacturer’s information on universal-link fuses for MV-distribution circuits. www.cooperpower.com/Library/pdf/KSEC030.pdf www.cooperpower.com/Library/pdf/02022.pdf

Top



ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals