Hi-Tech has become the leading name in high-voltage current-limiting fuse design and technology. Our backup type fuse offerings encompass oil-submersible (Trans-Guard OS/OS "Shorty") and externally mounted (Trans-Guard EXT) designs. These designs feature the highest current ratings in a single fuse body available in the industry today. We also provide an extensive line of full-range type fuses with our Trans-Guard FX and SX fuse products.
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in section "Safety locks"