| 摘要 |
An improved transient voltage suppression system for use in an electrical power distribution system which includes at least one power line and a neutral or ground line. The system includes a suppression circuit for each power line of the power distribution system, with each suppression circuit being coupled between a corresponding power line and the neutral or ground line. Each suppression circuit includes a first and second metal oxide varistors each coupled in series with corresponding first and second switching resistors and thermally coupled thereto, and a third metal oxide varistor coupled in parallel with the series connections of the first and second metal oxide varistors and the first and second switching resistors. A capacitor is coupled in parallel with the third metal oxide varistor. Coupled between each suppression circuit and a corresponding power line is a fuse for protecting the components of the circuits from current surges. A light-emitting diode is coupled in parallel with each fuse to emit light when the corresponding fuse is blown. Coupled between each of the power lines is a capacitor for shunting high frequency components of the power between the lines.
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