| 摘要 |
<p>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. Theinvention is characterised in that the pre-triggering circuit (10) comprisesat least one voltage-interrupting element (G) which is disposed so as, in theoff state, to prevent current from passing through the pre-triggering circuit(10), such that, in the absence of an overvoltage, the leakage current consumedby the pre-triggering circuit (10) is essentially zero. The invention relatesto overvoltage protection devices.</p> |
