| 摘要 |
An overvoltage protection device comprises a voltage limiter comprising in series connected spark gaps and resistors located in a hermetically closed porcelain insulator, and two electrodes, one of which a line electrode. A zero electrode is connected to resistor via a hollow tube which is fixed to inner hollow of the insulator, as a sealer a rubber ring is used. As a resistor a zinc oxide variable resistor is used, diameter thereof is within to , a height is to . |
