This is a Bussmann High Voltage H.R.C. Fuse rated for 11 kV and 80 A.
Product: Bussmann High Voltage HRC Fuse (11 kV, 80 A).
Purpose: These fuses are used as protection devices in medium voltage switchgear equipment to guard against overcurrents and short circuits
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Features: It includes a "striker if fitted" feature, which likely indicates a mechanism for visual or remote indication of fuse operation. Bussmann high voltage fuse links also incorporate an "M-effect" design feature for enhanced performance, ensuring cooler operation and lower maximum temperatures during fuse operation compared to fuses without this feature.