METHOD AND APPARATUS FOR DETECTION OF A FUSE FAILURE

A method for detection of a failure of a protective fuse (5) used to protect an associated load (7) against overcurrent and/or against overload, wherein the method comprises the steps of: measuring (SA) an electrical current, I, flowing through the protective fuse (5) to said load (7) by means of a...

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Bibliographische Detailangaben
Hauptverfasser:	Lenker, Hubert, Masel, Joram
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BASIC ELECTRIC ELEMENTS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRIC SWITCHES ELECTRICITY EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS EMERGENCY PROTECTIVE DEVICES GENERATION MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PHYSICS RELAYS SELECTORS TESTING
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Beschreibung
Zusammenfassung:	A method for detection of a failure of a protective fuse (5) used to protect an associated load (7) against overcurrent and/or against overload, wherein the method comprises the steps of: measuring (SA) an electrical current, I, flowing through the protective fuse (5) to said load (7) by means of a current sensor element (2), determining (SB) a thermal energy generated in the protective fuse (5) depending on the measured electrical current, I, and detecting (Sc) automatically a failure of the protective fuse (5) if the determined thermal energy exceeds a predetermined threshold value and if the electrical current, I, measured by the current sensor element (2) has stopped to flow through said protective fuse (5) .