Overvoltage protection device with improved leakage-current-interrupting capacity

An overvoltage and voltage cut-off technology, which is applied to emergency protection circuit devices, emergency protection circuit devices, circuit devices, etc. for limiting overcurrent/overvoltage, and can solve the problem that known protection devices are not completely effective and interfere with sensitive electronic systems, etc. question
CN101036275AInactive Publication Date: 2007-09-12ABB FRANCE SAS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ABB FRANCE SAS
Publication Date
2007-09-12
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a device for protecting an electrical installation (2) against overvoltages. The inventive device comprises: a main spark-gap (E1), and a pre-triggering circuit (10) which is connected to the main spark-gap (E1) such as to control the firing thereof in the event of an overvoltage. The invention is characterised in that the pre-triggering circuit (10) comprises at least one voltage-interrupting element (G) which is disposed so as, in the off state, to prevent current from passing through the pre-triggering circuit (10), such that, in the absence of an overvoltage, the leakage current consumed by the pre-triggering circuit (10) is essentially zero. The invention relates to overvoltage protection devices.
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Description

technical field

[0001] The invention relates to a general technical device for protecting electrical equipment or installations against voltage disturbances such as surges, in particular against transient overvoltages, for example due to lightning strikes.

[0002] More specifically, the present invention relates to a device for protecting electrical installations from voltage surges, in particular transient overvoltages due to lightning strikes, wherein all of the electrical installations thus bypassed Said devices include:

[0003] main spark gap,

[0004] A pre-triggering circuit sensitive to voltage surges, wherein the pre-triggered circuit bypasses the electrical service and is connected to a pre-triggering element that controls the striking of the spark gap arc in the event of a voltage surge . Background technique

[0005] Devices for protecting electrical equipment from overvoltages are widely used and are usually designed as "lightning arresters". Their essentia...

Claims

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