Differential detection toroid and device

In order to improve the reliability of differential protection and reduce mistrip, a detection toroid is improved. According to the invention, different methods are provided for homogenizing magnetic flux in the toroid (2) at ends (8) of a band (4) made of magnetic material, in particular, a wedge p...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	KEDOUS-LEBOUC AFEF, CHILLET CHRISTIAN, COLIN BRUNO, BUFFAT SEBASTIEN, MAS PATRICK
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRIC SWITCHES ELECTRICITY EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS EMERGENCY PROTECTIVE DEVICES GENERATION INDUCTANCES MAGNETS RELAYS SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES SELECTORS TRANSFORMERS
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Beschreibung
Zusammenfassung:	In order to improve the reliability of differential protection and reduce mistrip, a detection toroid is improved. According to the invention, different methods are provided for homogenizing magnetic flux in the toroid (2) at ends (8) of a band (4) made of magnetic material, in particular, a wedge portion (20) and slots (30, 40) are arranged on the end parts (18) of the band (4), for example, on the whole turn (61) on the end parts (18) of the band (4).