| 摘要 |
A transient voltage surge suppressor and short circuit monitor unit in an alternating current transmission system includes a metallic case or casing into which lead lines connected to each of the power lines and to the neutral lines are introduced. The metallic case encompasses a series-connected varistor and fuse pair connected between each lead from an incoming alternating current power line and the lead from the neutral line. A series-connected neon lamp and limiting resistor pair inside of the case are connected across each varistor to be normally energized to give visual indication of the effectiveness and readiness of the suppressor to pass voltage surges above a predetermined maximum voltage to neutral, and to give visual indication that there is no short circuit between the power lines and the neutral line.
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