A recent line of Hi-Tech Trans-Guard EXT Current-Limiting Backup Fuses from Thomas & Betts, the smallest size in the industry, interrupts high-fault currents and limits the amount of energy let-through to the source of the fault to a value well below the typical withstand capacity of the equipment, providing greater protection and safety. Applied in series with a cutout expulsion fuse for interrupting low- to mid-level currents, the backup fuses reduce energy let-through during a fault while still allowing enough let-through current to melt and drop open the coordinated cutout fuse, making it easy to identify visually where the fault occurred.
A few features of the fuses include:
Lowest energy let-through in the industry. The fuses’ allow the lowest total l2t let-throughs in the industry, providing maximum protection for overhead distribution equipment by minimizing energy let-through during a fault.
A complete range of ratings available. A high-fault interrupting capability of as high as 50kA symmetrical, as well as the broadest range of ratings available, at up to 100K at 8.3kV and 15.5kV, and up to 80K at 23kV.
Smallest size. The Hi-Tech Trans-Guard EXT fuse is the smallest fuse of its type in the industry, making it easier to handle and install. A durable design extends outdoor life and includes machined brass end caps and filament-wound epoxy, center-less ground tubular bodies with an oven-baked acrylic paint finish. They are come in a variety of mounts and connections.
Thomas & Betts
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