ABTRENNBARER ÜBERSPANNUNGSABLEITER FÜR NIEDERSPANNUNGSEINRICHTUNGEN

A disconnectable surge arrestor (10) includes an overvoltage limiter (16), a disconnection device (18) with contact (22) actuated by a mechanism (24), and a trip circuit cooperating with the mechanism (24) in order to ensure the opening of the contact (22) when the overvoltage limiter is defective....

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	BONNIAU, MICHEL
Format:	Patent
Sprache:	ger
Schlagworte:	CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS GENERATION
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Beschreibung
Zusammenfassung:	A disconnectable surge arrestor (10) includes an overvoltage limiter (16), a disconnection device (18) with contact (22) actuated by a mechanism (24), and a trip circuit cooperating with the mechanism (24) in order to ensure the opening of the contact (22) when the overvoltage limiter is defective. Disconnection is effected during a first transient state of short-circuiting of the overvoltage limiter (16), prior to a corresponding second final state of destruction [lacuna] an open earth circuit. The disconnection time is less than 20 ms when the limited current reaches or exceeds an intensity of 10 A, and respectively less than 100 ms and 50 ms for current intensities of 0.25 A and 1 A. Application: protection of a low-voltage electrical installation.