THREE-PHASE CIRCUIT BREAKER WITH PHASE SPECIFIC SWITCHING

The present invention relates to a method for controlling a circuit breaker. The circuit breaker is connected in a three-phase system having an inductive load, and the method comprises method for controlling a circuit breaker, the circuit breaker being connected in a three-phase system having an ind...

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Bibliographische Detailangaben
Hauptverfasser:	LILJESTRAND, Lars, LINDELL, Elisabeth, HALÉN, Stefan
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:	The present invention relates to a method for controlling a circuit breaker. The circuit breaker is connected in a three-phase system having an inductive load, and the method comprises method for controlling a circuit breaker, the circuit breaker being connected in a three-phase system having an inductive load, the method comprises opening (S100) a first phase (L 1 ) of the three-phase system before a zero crossing of a current in the first phase (L 1 ), opening (S120) the second and third phases (L 2 and L 3 ) of the three-phase system a quarter period after opening the first phase (L 1 ), closing (S140) the first and second phase (L 1 and L 2 ) at a peak voltage of a voltage between the first and second phases (L 1 and L 2 ), and closing (S150) the third phase (L 3 ) a quarter period after closing the first and second phases (L 1 and L 2 ). A circuit breaker controller is also presented.