Okay, here's a breakdown and summary of the provided document about Eaton Bussmann Limitron fuses:

1. Product Overview:

️· Product: Eaton Bussmann Limitron fuses. These are circuit protection devices (fuses) designed to protect electrical circuits from overcurrents.
️· Voltage Rating: 600VAC
️· Current Ratings: Available from 1A to 800A (and beyond, as indicated by the data)
️· Key Features Highlighted: Current limitation capabilities.

2. Technical Specifications & Performance Data:

️· Current-Limitation Curves: The document emphasizes the fuse's ability to limit the peak current during a short circuit. This is critical for protecting downstream equipment and minimizing damage. The curves show how the apparent RMS symmetrical current is limited relative to the fuse rating.
️· Time-Current Curves: (Not explicitly shown in the provided snippet, but mentioned) These curves would graphically represent the fuse's melting time versus the amount of current flowing through it.
️· "Prosp. S.C.C." and "Let-through current": This refers to the "Prospective Short Circuit Current" and the "Let-through current." The "Let-through current" is the amount of current that passes through the circuit *after* the fuse has started to melt. Lower let-through currents are desirable for better protection. The values in the table represent this data for different fuse ratings and short circuit conditions.
️· Asymmetrical Short Circuit: There is a mention of asymmetrical short circuits. The table provides data that indicates the let-through current.
️· A-B = 1.23 x SYM RMS Amps: Indicates an asymmetrical short circuit is present.

3. Data Summary Table:

The most important section is the table that quantifies the current-limiting characteristics. Here's what it illustrates:

️· Fuse Rating: Lists the different current rating options of the fuses (30A, 60A, 100A, 200A, 400A, 600A, 200A, 400A, 600A, 800A and higher).
️· Short Circuit Current (kA): The column indicates the prospective short circuit current (in kA) used to test the fuse's performance.
️· Let-Through Current: The numbers in the cells indicate the apparent RMS symmetrical current that passes through the circuit *after* the fuse starts to melt (let-through current) for each combination of fuse rating and short circuit current.

4. General Notes & Legal Disclaimers:

️· Controlled Copy: The data sheet emphasizes that the electronic version on the Eaton network is the only controlled copy.
️· Design Changes: Eaton reserves the right to make changes without notice.
️· Testing Required: Users must test the fuse in their specific application.
️· Trademarks: Eaton, Bussmann, and Limitron are trademarks.



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