Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Arc-flash on Grounded-B system

Status
Not open for further replies.
SJBatTCE

SJBatTCE

Electrical
Joined
Oct 8, 2001
Messages
41
Location
US
Anyone have suggestions for conducting an arc-flash study on a 480V, three-wire, grounded-b system? Is this possible? If so, should it be treated as an ungrounded-delta? Not sure where to start with this one... TIA!
 
Sort by date Sort by votes
SJB

One has a grounded system. Use the grounded fudge factor. Treat it as any other grounded 480 volt system.
 
Upvote 0 Downvote
That's what I'm inclined to do here. My arc-flash numbers will be quite conservative as there will be only two phases contributing to the fault, correct?
 
Upvote 0 Downvote
Nope, it will be a three-phase fault, just like any other arc-flash event.
 
Upvote 0 Downvote
Status
Not open for further replies.

Similar threads

K
  • Question Question
Corner grounded Delta - Photovoltaic system
Replies
4
Views
4K
ThatShouldHaveWorked
ThatShouldHaveWorked
K
  • Locked
  • Question Question
Arc Flash Analysis SKM
Replies
0
Views
1K
Kanu_01
K
T247
  • Locked
  • Question Question
Wye-Wye Transformer on Low Resistance Grounded System
Replies
8
Views
6K
RRaghunath
RRaghunath
tofulover
  • Question Question
Step-up transformer = Star-grounded LV / Star-grounded HV. How to calculate EPR?
Replies
10
Views
23K
tofulover
tofulover
charz
  • Question Question
Arc Resistant Switchgear
Replies
1
Views
8K
dpc
dpc

Part and Inventory Search

Sponsor

Back
Top