ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat Box
Recent Posts
Questioning the electrical norms
by HotLine1 - 03/04/21 12:35 PM
Lock-down Thread
by gfretwell - 03/03/21 12:38 PM
Northern Tool Recalls Powerhorse Generators
by Admin - 02/25/21 09:49 PM
You will never guess
by gfretwell - 02/25/21 07:48 PM
New in the Gallery:
Facebook follies, bad wiring
FPE in Germany pt.2
Who's Online Now
1 registered members (Scott35), 20 guests, and 17 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Overhead Three Phase 13.8 & 4160 Delta #201849 06/28/11 11:16 AM
Joined: Mar 2003
Posts: 849
Y
Yoopersup Offline OP
Member
Overhead 13.8 & 4160 Delta no neutral present.
Running to remote building . Owners Not Utilitys.
When you come down pole to Step down Transformer where & how do you ground?
If ungrounded delta how does it trip ocp , located remotely??
Remember its Owners , Not Utlity so there Feeders!
Yoopersup

2017 / 2014 NEC & Related Books and Study Guides
Re: Overhead Three Phase 13.8 & 4160 Delta [Re: Yoopersup] #201857 06/28/11 07:26 PM
Joined: Jan 2005
Posts: 5,316
renosteinke Offline
Cat Servant
Member
You ground / bond to the case of the transformer.

The OCPD trips only after the SECOND line faults to ground. That's why phase monitors are required.

Non-NEC compliant solution: Slap the foolishness out of this customer- there's no reason to preserve an ungrounded delta.

Re: Overhead Three Phase 13.8 & 4160 Delta [Re: Yoopersup] #201860 06/28/11 07:51 PM
Joined: Mar 2003
Posts: 849
Y
Yoopersup Offline OP
Member
Design By Electrical Engineer!
Phase monitors on a overhead line? 4160.
Or 13800 volts?? Please give details .

Re: Overhead Three Phase 13.8 & 4160 Delta [Re: Yoopersup] #201871 06/28/11 11:49 PM
Joined: Jul 2004
Posts: 9,571
G
gfretwell Offline
Member
The medium voltage lines around my area seem to have some kind of impedance grounding going on. You see a funny looking insulator device connected to ground every so often along the line. I suspect this is just a path for lightning,


Greg Fretwell
Re: Overhead Three Phase 13.8 & 4160 Delta [Re: Yoopersup] #201874 06/29/11 01:35 AM
Joined: Feb 2003
Posts: 939
F
frenchelectrican Offline
Member
Originally Posted by Yoopersup
Design By Electrical Engineer!
Phase monitors on a overhead line? 4160.
Or 13800 volts?? Please give details .


Ya sérieux ??

What kind of ground fault detector you have or will set up most common in MV/HV class will have impleaded or resteror grounded or netural set up depending on the supply format is.

And you will need phase monitor to detect the ground fault on them and some case you may need automatique recloser { this part I am not too crazy but it do work very well }

Merci,
Marc


Pas de problme,il marche n'est-ce pas?"(No problem, it works doesn't it?)


Featured:

2020 National Electrical Code
2020 National Electrical
Code (NEC)

* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
Samurai
Samurai
Fl.
Posts: 46
Joined: May 2007
Show All Member Profiles 
Top Posters(30 Days)
Popular Topics(Views)
275,739 Are you busy
209,654 Re: Forum
197,002 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.3