The Cooper Bay-O-Net is a field-replaceable expulsion fuse family made by Eaton's Cooper Power series and used to protect distribution transformers and other apparatus. It is used on single-phase conventional and self-protected distribution transformers rated through 500 kVA and on three-phase equipment through 1500 kVA. Fuse links come in current sensing and dual sensing versions, with continuous current ratings from 3 A to 140 A depending on catalog number. The best application is in series with a coordinated current-limiting backup fuse such as the ELSP; the Bay-O-Net clears overloads and secondary faults, and the backup fuse operates only on internal equipment failure. If no current-limiting fuse is used in series, an isolation link is required, and where available fault current exceeds the interrupting rating, coordinated current-limiting fusing must be provided. Fuse holders are either sidewall-mounted or cover-mounted, and the cover-mounted type is limited to 23 kV maximum; re-fusing instructions cover 23 and 38 kV designs. During re-fusing, the holder is pulled from the Bay-O-Net housing and wiped clean of insulating fluid, and some catalog numbers are one integral link, cartridge and end plug assembly. The assembly can be damaged if it clears faults above its maximum interrupting current.
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manufactured_byc1 drafted · lead Cooper Power Systems proposed
Sold as Eaton's Cooper Power series Bay-O-Net fuses.
sec=23 h=dad49b479954sec=h21 h=d17dda19ab55sec=h2 h=3c6cf33e2698rated_output_currentConditions: Continuous current rating across Bay-O-Net fuse link catalog numbers 4000358C03 through 4000358C18CB
tbl=2 h=b7ed0a09a830review note: support check: partial - Table lists continuous current ratings 3-140 A for catalog numbers C03 through C18CB, but 'rated output current' is a continuous current rating, which is fine; the range matches, though the table shows only discrete values.
compatible_withc3 drafted · lead Cooper ELSP current-limiting fuse proposed
Ideal use is in series with a coordinated current-limiting backup fuse; Bay-O-Net clears secondary faults and overloads, the current-limiting fuse clears high-level faults.
sec=h3 h=39b6ca614f2esec=h2 h=3c6cf33e2698requiresc4 drafted · lead Cooper isolation link proposed
Conditions: When the Bay-O-Net fuse is not used in series with a current-limiting fuse
sec=h3 h=39b6ca614f2esec=h2 h=3c6cf33e2698certified_toc5 drafted · lead ISO 9001 proposed
Listed under Standards as an ISO 9001 certified quality management system (manufacturer QMS).
sec=h21 h=d17dda19ab55review note: support check: partial - The Standards section lists an ISO 9001 Certified Quality Management System, but it does not explicitly say the fuse is certified, only that the QMS is.