An expulsion fuse is a vented fuse in which the expulsion effect of the gases produced by internal arcing, either alone or aided by other mechanisms, results in current interruption. An expulsion fuse is not current limiting and, as a result, limits the duration of a fault on the electrical system, not the magnitude.
Eaton’s DBU Fuses are boric acid, expulsion-style fuse units suitable for both indoor and outdoor applications. They provide effective protection for circuits and equipment which operate on voltage systems up to 34.5 kV and are low initial cost alternatives to refillable fuses.
Eaton’s RBA and RDB expulsion fuse units offer outstanding protection and reliability, broad selection possibilities, ease of installation, and economy over time. They are intended for use in enclosures (RBA) or outdoors (RDB) in power applications up to an operational voltage of 34.5 kV.
Eaton’s BA/DBA Power Fuses are boric acid expulsion fuses that offer double protection for circuits and equipment which operate on voltages from 7.2 to 145 kV. They have a vented device design for power applications and are available as replacement fuse units for existing applications.