ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Israel
by annemarie1. 04/18/19 02:35 PM
Welded Copper Connections
by gfretwell. 04/17/19 10:03 PM
Water heater calculationsSo when I count calculati
by watersparkfalls. 04/13/19 12:43 PM
Health Canada Electric Construction heaters recall
by dougwells. 04/12/19 01:22 AM
Burning out of return(white) side of 120volt rec
by richard. 04/08/19 07:12 PM
New in the Gallery:
What is this for?
Plug terminals
Who's Online Now
0 registered members (), 2 guests, and 6 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Transformers & Feeders: 3Ph 4Wire Open Delta #193112
03/19/10 08:09 AM
03/19/10 08:09 AM
Scott35  Offline OP
Broom Pusher and
Member
Joined: Oct 2000
Posts: 2,720
Anaheim, CA. USA
Transformers & Feeders: 3Ph 4Wire Open Delta

Five Drawings of Transformer Setups (Connection Schemes);
Primary and Secondary Feeders, Plus OCPDs and Panelboards for:
3 Phase 4 Wire Open Delta Transformers
(Two Voltage SDS)
NOTE: Click on Image to view Full-Sized Image

------------------------------------------------------------

Drawing 3PH4W-OD1: 480V x 120/240V 3 Phase 4 Wire Open Delta - Center Tap Grounded Neutral
(Max. Voltage To Ground = 200V, Nominal = 120V; With Grounded Conductor)
Single Panelboard fed by Secondary Feeders.
[Linked Image]

-----------------------------------------------------------

Drawing 3PH4W-OD2: 480V x 120/240V 3 Phase 4 Wire Open Delta - Center Tap Grounded Neutral
(Max. Voltage To Ground = 200V, Nominal = 120V; With Grounded Conductor)
Single Panelboard fed by Secondary Feeders, Additional Panelboard "Subfed".
[Linked Image]

-----------------------------------------------------------

Drawing 3PH4W-OD3: 480V x 120/240V 3 Phase 4 Wire Open Delta - Center Tap Grounded Neutral
(Max. Voltage To Ground = 200V, Nominal = 120V;, With Grounded Conductor)
Two Panelboards fed via Tapped Feeder.
[Linked Image]

-----------------------------------------------------------

Drawing 3PH4W-OD4: 480V x 120/240V 3 Phase 4 Wire Open Delta - Center Tap Grounded Neutral
(Max. Voltage To Ground = 200V, Nominal = 120V; With Grounded Conductor)
Two separate Panelboards fed by Secondary Feeders- each set derived from "X" Terminals.
[Linked Image]

-----------------------------------------------------------

Drawing 3PH4W-OD5: 480V x 120/240V 3 Phase 4 Wire Open Delta - Center Tap Grounded Neutral
(Max. Voltage To Ground = 200V, Nominal = 120V; With Grounded Conductor)
Distribution Panel fed by Secondary Feeders.
[Linked Image]

-----------------------------------------------------------------------------------------


Scott " 35 " Thompson
Just Say NO To Green Eggs And Ham!
Test Equipment:
Large Selection of Test Equipment For Electrical, HVAC, Test & Measurement
Large Selection of Test Equipment For Electrical, HVAC, Test & Measurement
Re: Transformers & Feeders: 3Ph 4Wire Open Delta [Re: Scott35] #193113
03/19/10 08:12 AM
03/19/10 08:12 AM
Scott35  Offline OP
Broom Pusher and
Member
Joined: Oct 2000
Posts: 2,720
Anaheim, CA. USA
Description Text for above images:

Text #3: Two Voltage SDS - Primary & Secondary OCPDs
(Click on Image to view Full-Sized Image)
[Linked Image]


Scott " 35 " Thompson
Just Say NO To Green Eggs And Ham!

Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
Bill Addiss
Bill Addiss
NY, USA
Posts: 3,905
Joined: October 2000
Show All Member Profiles 
Top Posters(30 Days)
Popular Topics(Views)
254,445 Are you busy
190,685 Re: Forum
180,402 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.019s Queries: 15 (0.005s) Memory: 0.9468 MB (Peak: 1.0644 MB) Zlib enabled. Server Time: 2019-04-19 10:46:35 UTC