Improving the design of MV load-break switch contacts
Master thesis
Permanent lenke
https://hdl.handle.net/11250/2644768Utgivelsesdato
2019Metadata
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Sammendrag
The breaking of currents either during maintenance, faults, or overload is common in
load-break switches. Because switches are usually placed before critical installations it is
important that their designs implementations are done in a manner that upholds fault
tolerance. In efforts to achieve this, a fault tolerance design for switches, this project
explores the ways through which an MV load-break switch contact can be improved.
Specifically, this research will focus on design implementations of ratios between
contact and bulk resistance. Secondly, it will explore the impact of contact force on both
friction and resistance. As such, this project will go a step further and look at the
influence of surface lubrication on both friction and resistance. By understanding the
implication of these three factors, the project shall be in a better position recommend
improved design characteristics of a tulip contact.
Finally, yet importantly, in order to affirm any findings of an improved MV load-break
switch contacts design, this project will review operation theories that govern this type
of switches. Through this approach, this study will present appropriate and measurable
recommendations for an improved design of an MV load-break switch such as an
increase of a-spots by higher contact force.