| 摘要 |
<p>The present invention relates to a circuit for protection against overvoltages, comprising three protection elements (21, 22, 23) connected up via their first terminal to a common point (C) and via their second terminal to a first line (A), to the second line (B) and to earth respectively, each protection element comprising the antiparallel combination of a protection component (T1, T2, T3) and of a diode (D1, D2, D3), the common point being connected to a terminal of like polarity of each of the protection components. In the case where one of the lines exhibits in the normal state a larger deviation in bias relative to earth than the other, the cathodes or the anodes of the protection components are connected up to the common point according to whether the most biased line is negative or positive relative to earth. <IMAGE></p> |
