ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Potseal 11
Recent Posts
Electrode boilers question
by annemarie1. 04/27/17 01:40 PM
Why cables look like they do
by LongRunner. 04/26/17 09:36 AM
Dimmable LED 2x4 lay in fixtures
by HotLine1. 04/24/17 05:43 PM
Old decora style outlets
by Lostazhell. 04/22/17 07:59 PM
Permit Snafus...AHJs and Contractors Jump in
by gfretwell. 04/22/17 01:11 PM
New in the Gallery:
SE cable question
Popular Topics(Views)
234,822 Are you busy
169,596 Re: Forum
162,846 Need opinion
Who's Online Now
1 registered members (geoff in UK), 80 guests, and 10 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#193112 - 03/19/10 08:09 AM Transformers & Feeders: 3Ph 4Wire Open Delta  
Scott35  Offline

Broom Pusher and
Member
Joined: Oct 2000
Posts: 2,707
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

#193113 - 03/19/10 08:12 AM Re: Transformers & Feeders: 3Ph 4Wire Open Delta [Re: Scott35]  
Scott35  Offline

Broom Pusher and
Member
Joined: Oct 2000
Posts: 2,707
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!


Member Spotlight
Bill Addiss
Bill Addiss
NY, USA
Posts: 3,878
Joined: October 2000
Show All Member Profiles 
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.009s Queries: 15 (0.002s) Memory: 0.7473 MB (Peak: 0.8641 MB) Zlib enabled. Server Time: 2017-04-27 18:48:33 UTC