Thermal Analysis of the Fuse with Unequal Fuse Links Using Finite Element Method
In this paper a three dimensional thermal model of high breaking capacity fuse with unequal fuse links is proposed for both steady-state or transient conditions. The influence of ambient temperature and electric current on the temperature distribution inside the fuse, has been investigated. A thermal analysis of the unbalanced distribution of the electric current through the fuse elements and their influence on fuse link temperature rise, has been performed. To validate the three dimensional thermal model, some experimental tests have been done. There is a good correlation between experimental and simulation results. Keywords—Electric fuse, fuse links, temperature distribution, thermal analysis.
Experimental and Numerical Analysis of the Thermal Field in a High Power Low Voltage Fuse
In this paper, the results from a study of the heating in a high power low voltage fuse are presented. The experimental tests have been conducted with an especially developed experimental installation. Thermocouples of K-type have been used for measuring the temperature. The numerical study has been done with computer model of the fuse made in COMSOL software. Coupled electric-thermal problem is solved. The model takes into account both the heat transfer from the surface of the fuse toward the environment by radiation and convection, and the heat flow, propagating from the current-carrying elements of the fuse toward the connecting conductors. A comparison between the obtained numerical and experimental results, concerning the heating of the fuse has been drawn.
Tethering the Administrative State: The Case Against Chevron Deference for FCC Jurisdictional Claims
Like many other agencies, the Federal Communications Commission has seen significant regulatory growth under President Obama. But unlike health care, financial reform, and other areas, this growth has come without statutory guidance from Congress. The FCC’s assertion of jurisdiction over broadband service is reminiscent of its earlier attempts to regulate cable and to deregulate telephone service, efforts that courts have viewed skeptically in the absence of specific statutory authorization. But this skepticism is in tension with Chevron, which grants agencies substantial deference to interpret ambiguities in the statutes that they administer. This article argues that Chevron deference should not extend to agency jurisdictional claims, such as the FCC’s claim to authority over broadband. For both constitutional and policy reasons, courts should distinguish between agency action that fills a gap in a statutory scheme and action that defines the outer boundary of that scheme. As the Commission’s net neutrality project winds its way through the judicial system, courts should not allow the agency to define the limits of its own authority, and should instead search closely for a grant of authority from Congress.