H - Electricity – 01 – H
Patent
H - Electricity
01
H
306/143
H01H 85/18 (2006.01) H01H 85/38 (2006.01)
Patent
CA 1186716
CURRENT-LIMITING FUSE WITH IMPROVED MEANS OR INTERRUPTING LOW OVERCURRENTS ABSTRACT OF THE DISCLOSURE This current-limiting fuse comprises a fusible element having a predetermined location at which an arc will be initiated when prolonged overcurrents of relatively low value have persisted for a predetermined duration. For increasing the arc voltage developed by said arc, an electrical insulating member is disposed about the fusible element in a position where at least a portion of the arc will burn within the insulating member and cause vapors to be evolved from the material of the insulating member. The insulating member is of a material that evolves substantially no vapors or gases at the temperatures reached by the insulating material prior to arc-initiation during prolonged overcurrents of up to one hour in duration. This material is a baked material, a major portion of which is hydrated aluminum silicate including water of hydrogen that is released only at temperatures in excess of those attained by the insulating material during prolonged overcurrents as long as one hour.
411665
Damsky Ben L.
Zlupko John E.
Company General Electric
Eckersley Raymond A.
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