| 摘要 |
PROBLEM TO BE SOLVED: To markedly improve reaction characteristic of a spark clearance. SOLUTION: The spark clearance has as much possible partial spark clearances connected in series, in particular, these partial spark clearances are wired by capacitor (6) except the first spark clearance reacting in the case of overvoltage phenomenon, and, in particular, the second spark clearance and each spark clearance other than it are connected with common reference electric potential (4), particularly, ground potential through the capacity (6). A bypass (7) composed of an auxiliary spark clearance (8) having a smaller reaction voltage than a reaction voltage of a single spark clearance or these partial spark clearances and at least one varistor (9) is connected in parallel with a multiple spark clearance composed of the single spark clearance or a plurality of partial spark clearances connected in series. COPYRIGHT: (C)2004,JPO |
