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#193117 - 03/19/10 05:59 AM Transformers & Feeders: 3 Phase 4 Wire Wye
Scott35 Offline

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Registered: 10/19/00
Posts: 2707
Loc: Anaheim, CA. USA

Transformers & Feeders: 3 Phase 4 Wire Wye


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

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Drawing 3PH4WY-1: 480V x 208Y/120V 3 Phase 4 Wire Wye - Star Point Grounded Neutral
(Max. Voltage To Ground = 120V; With Grounded Conductor)
Single Panelboard fed by Secondary Feeders.
Secondary OCPD at Panelboard.


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

Drawing 3PH4WY-2: 480V x 208Y/120V 3 Phase 4 Wire Wye - Star Point Grounded Neutral
(Max. Voltage To Ground = 120V; With Grounded Conductor)
Single Panelboard fed by Secondary Feeders, Additional Panelboard "Subfed".
Secondary OCPD at First Panelboard.


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Drawing 3PH4WY-3: 480V x 208Y/120V 3 Phase 4 Wire Wye - Star Point Grounded Neutral
(Max. Voltage To Ground = 120V; With Grounded Conductor)
Two Panelboards fed via Tapped Feeder.
Secondary OCPD at each Panelboard.


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

Drawing 3PH4WY-4: 480V x 208Y/120V 3 Phase 4 Wire Wye - Star Point Grounded Neutral
(Max. Voltage To Ground = 120V; With Grounded Conductor)
Two separate Panelboards fed by Secondary Feeders- each set derived from "X" Terminals.
Secondary OCPD at each Panelboard.


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

Drawing 3PH4WY-5: 480V x 208Y/120V 3 Phase 4 Wire Wye - Star Point Grounded Neutral
(Max. Voltage To Ground = 120V; With Grounded Conductor)
Distribution Panel fed by Secondary Feeders.
With Secondary OCPD at Distribution Panel.


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

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


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Scott " 35 " Thompson
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