It is currently Sun Oct 22, 2017 3:12 am



Post new topic Reply to topic
Author Message
ekstra   ara
 Post subject: incident energy
PostPosted: Tue Apr 20, 2010 12:07 pm 
Offline

Joined: Mon Apr 19, 2010 1:05 pm
Posts: 2
The system in our potash mines are resistance/grounding type.Since potash is not a conductor grouding is done through cable connected to the switchgear box on the surface. When we use the software to calculate the incident energy,do we need to consider the impedance of the grounding cable also for each equipment?


Top
 Profile Send private message  
Reply with quote  
 Post subject:
PostPosted: Tue Apr 20, 2010 1:28 pm 
Offline
Sparks Level

Joined: Wed Sep 23, 2009 9:29 pm
Posts: 83
Location: Western Canada
ushapush wrote:
The system in our potash mines are resistance/grounding type.Since potash is not a conductor grouding is done through cable connected to the switchgear box on the surface. When we use the software to calculate the incident energy,do we need to consider the impedance of the grounding cable also for each equipment?


You won't experience single phase faults because of the NGR. The shaft feeders have a ground in them but you're looking for phase to phase faults in an arc flash event so I'm not sure why you would consider the grounding conductor?

Also the software's cable library should auto populate the cable information when you're buiding your model.


Top
 Profile Send private message  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 2 posts ] 

All times are UTC - 7 hours


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
cron
© 2017 Arcflash Forum / Brainfiller, Inc. | P.O. Box 12024 | Scottsdale, AZ 85267 USA | 800-874-8883