"The steady state and short circuit performance of multi-link fuses is investigated, as it is affected by the magnetic field of the nearby returning current and the current flowing in the fuse itself. The fuses investigated are low voltage (600 volts or less), multi-link fuses with ratings between 400 and 4000 amperes. The effects of the above mentioned magnetic fields upon the steady state current distribution within the fuse and upon the mechanical forces acting on the individual fuse links are calculated, while the effects of close proximity of the returning current upon short circuit fuse performance are shown by experimental results.
Results of the steady state investigations reveal that only slight steady state unequal current distribution results from the magnetic field produced by the fuse's nearby returning current. Skin effect in a multi-link fuse, produced by the magnetic field generated by currents in the fuse, was also found to be very slight. In all steady state cases forces acting on the fuse links were calculated to be of very small magnitude.
Close proximity of returning current produced a slight asymmetry in the fuse's short circuit interruption, sometimes producing broken fuse links which did not sustain arcing. It was found that none of the magnetic field phenomena investigated hinder the proper performance of multi-link fuses"--Abstract, page ii.
McPherson, George, 1921-2017
Morgan, J. Derald
Rivers, Jack L.
Electrical and Computer Engineering
M.S. in Electrical Engineering
University of Missouri--Rolla
ix, 116 pages
© 1970 John Thomas Schultz, All rights reserved.
Thesis - Open Access
Skin effect (Electricity)
Print OCLC #
Electronic OCLC #
Schultz, John Thomas, "The effects of magnetic fields upon the steady state and short circuit performance of low voltage multi-link fuses" (1970). Masters Theses. 5045.