Proceedings ArticleDOI
The impact of system grounding practices on generator fault damage
L.J. Powell
- Vol. 34, Iss: 5, pp 33-37
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In this article, the authors provide an analytical perspective on the problem and suggest that the real issue is the manner in which the neutral of the generator itself is grounded, rather than the stator ground faults.Abstract:
Industry has recently become sensitized to the problem of severe generator damage due to stator ground faults. To prevent this damage, it has been suggested that the practices employed for neutral grounding should be changed. This paper provides an analytical perspective on this problem and suggests that the real issue is the manner in which the neutral of the generator itself is grounded.read more
Citations
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Journal ArticleDOI
Grounding and ground fault protection of multiple generator installations on medium-voltage industrial and commercial power systems - Part 1: The problem defined Working Group Report
P. Pillai,B.G. Bailey,J. Bowen,G. Dalke,B.G. Douglas,J. Fischer,J.R. Jones,D.J. Love,Charles J. Mozina,N. Nichols,C. Normand,L. Padden,A. Pierce,L.J. Powell,D.D. Shipp,N.T. Stringer,R.H. Young +16 more
TL;DR: In this article, the authors discuss typical grounding practices and ground fault protection methods for medium-voltage generator stators, highlighting their merits and drawbacks, and provide an overview of the generator damage mechanism during stator ground faults.
Journal ArticleDOI
Energy efficiency of VSDs
J.A. Rooks,Alan K. Wallace +1 more
TL;DR: In this paper, the performance tests of variable speed drive systems are planned to measure efficiency of the VSD unit and the efficiency of an involved motor, where the real benefit of VSD systems is the reduction of energy used to provide the quantity of end product of the pumps or fans.
Journal ArticleDOI
Grounding and ground fault protection of multiple generator installations on medium-voltage industrial and commercial power systems - Part 4: Conclusion and Bibliography Working Group Report
P. Pillai,B. Bailey,J. Bowen,G. Dalke,B.G. Douglas,J. Fischer,J.R. Jones,D.J. Love,Charles J. Mozina,N. Nichols,C. Normand,L. Padden,A. Pierce,Louie Powell,David D. Shipp,N.T. Stringer,R.H. Young +16 more
TL;DR: This paper discusses typical grounding practices and ground fault protection methods for medium-voltage generator stators, highlighting their merits and drawbacks, and provides an overview of the generator damage mechanism during stator ground faults.
Proceedings ArticleDOI
Utilizing third harmonic 100% stator ground fault protection, a cogeneration experience
TL;DR: In this paper, the authors introduce an experience with the applications of 3rd harmonic schemes in cogeneration applications and depict their advantages and limitations, in light of the experience and analysis, applications of certain third harmonic scheme configurations are contemplated.
Proceedings ArticleDOI
Ground Fault Protection for Bus-Connected Generators in an Interconnected 13.8 kV System
TL;DR: In this paper, the authors describe selective ground fault protection for a 13.8-kV system with multiple bus-connected generators, synchronous bus ties, and utility interconnections.
References
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Journal ArticleDOI
Resistance of Low-Voltage AC Arcs
TL;DR: In this article, it was shown that the most probable value of resistance of the low-voltage arc in ohms is equal to 40 divided by the arcing current to the 0.85 power.
Journal ArticleDOI
Predicting Damage from 277-V Single Phase to Ground Arcing Faults
TL;DR: In this paper, an arbitrary practical limit is proposed such that I 1.5 t is numerically not greater than 250 times the ampere rating of the circuit, which is achievable with commercially available equipment using simple time current band coordination.
Journal ArticleDOI
Influence of Third Harmonic Circulating Currents in Selecting Neutral Grounding Devices
TL;DR: In this article, the causes of third harmonic currents and their effects on the power system are reviewed, and the common methods of neutral grounding with regard to circulating harmonic currents are discussed with respect to harmonic currents.
Journal ArticleDOI
The historical development of neutral grounding practices
TL;DR: In this paper, the evolution of neutral-grounding practices are described using four flow diagrams, respectively depicting: the early neutral grounding practices in the electrical industry, the low-voltage neutral ground practices in industry; the medium-voltages neutral grounding practice in industry, and the integration of these figures, with complementary notations, into a composite flow diagram.
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