DC CIRCUIT BREAKER PROVIDED WITH AN OVERCURRENT ELECTRONIC TRIP UNIT AND METHOD FOR CONTROLLING A DC CIRCUIT BREAKER

Disclosed is a DC circuit breaker 14 including at least one contact 16 configured to be coupled between a source of DC power and a DC load and a method of controlling the closed and open state of the contact 16. The DC circuit breaker 14 includes a thermomagnetic trip circuit 18 and an electronic tr...

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Bibliographische Detailangaben
Hauptverfasser:	BERGER, Maxime, LAVERTU, Carl
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 RELAYS SELECTORS
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Beschreibung
Zusammenfassung:	Disclosed is a DC circuit breaker 14 including at least one contact 16 configured to be coupled between a source of DC power and a DC load and a method of controlling the closed and open state of the contact 16. The DC circuit breaker 14 includes a thermomagnetic trip circuit 18 and an electronic trip circuit 32. The electronic trip circuit 32 is responsive to a sensed level of DC current flowing in the contact 16 in a closed state for accumulating an indication of the total time the DC current is sensed. The accumulated indication of the total time the DC current is sensed is compared to a predetermined value or level and, in response to the accumulated indication exceeding the predetermined value or level, the contact 16 is caused to switch from a closed state to an open state.