DocumentCode :
1098088
Title :
Grounding transformer applications and associated protection schemes
Author :
Detjen, Edson R. ; Shah, Kanu R.
Author_Institution :
Shah & Associates, Gaithersburg, MD, USA
Volume :
28
Issue :
4
fYear :
1992
Firstpage :
788
Lastpage :
796
Abstract :
The use of grounding transformers on three-phase ungrounded governmental, industrial, and commercial distribution systems is addressed. Ground-fault protection schemes that provide selective and reasonably fast tripping are often incorporated with these grounding transformers. The authors first review the state of the art of grounding transformers to assist electric power systems engineers in the proper understanding of the use and applications of these devices and then discuss two governmental system case studies illustrating improperly applied grounding transformers and/or associated ground-fault protection systems. In addition, they describe remedial actions taken to correct these deficiencies. The objective in presenting improper grounding transformer applications is to highlight protection concerns that are often ignored. It is stressed that a single grounding transformer is not adequate for use with a multibus configuration. A unique protection scheme for use on a multibus arrangement is presented
Keywords :
distribution networks; earthing; power system protection; power transformers; commercial distribution systems; electric power systems; governmental distribution systems; grounding transformers; industrial distribution systems; protection schemes; three phase ungrounded systems; Electrical equipment industry; Grounding; Industrial power systems; Industry Applications Society; Power engineering and energy; Power system protection; Power system transients; Scattering; Stress; Systems engineering and theory;
fLanguage :
English
Journal_Title :
Industry Applications, IEEE Transactions on
Publisher :
ieee
ISSN :
0093-9994
Type :
jour
DOI :
10.1109/28.148444
Filename :
148444
Link To Document :
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