By Topic

Wyes and wye nots of three-phase distribution transformer connections

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Rusch, R.J. ; Stanley Consultants Inc., Muscatine, IA, USA ; Good, M.L.

The authors summarize the pros and cons of various three-phase transformer connections. Recommendations are provided regarding the standard types of connections a utility should offer for various service requirements. Consideration is given to warehousing costs, ferroresonance, neutral grounding, core construction, overvoltages, unbalanced loading, zero sequence sources, and through faults. Emphasis is placed on the exchange of information between customer and utility. An application for three-phase service form that can be used to determine service requirements, including voltage, grounded, ungrounded, three-phase load, single-phase load, motor characteristics, and fault current interrupting rating of secondary breakers and switchgear, is provided. It is recommended that a rural electric utility standardize on a limited number of transformer connections to serve three-phase loads. Recommended standard connections include: (1) four-wire service, grounded-wye-grounded-wye; and (2) three-wire service, wye-delta. Suggestions on utility-supplied information such as maximum available three-phase and line-to-ground fault currents are provided, and the operation of ungrounded systems is discussed

Published in:

Rural Electric Power Conference, 1989. Papers Presented at the 33rd Annual Conference

Date of Conference:

30 Apr-2 May 1989