| 摘要 |
The design of the triggering circuit (1) of the overvoltage protection connected in three poles to the spark gap (4) of the overvoltage protection, provided with input terminals I (2) and II (3), comprising an auxiliary electrode (7) of the spark gap connected in series with varistor I (8) and one end of the secondary winding (14) of the transformer (13), the other end of which is connected to main electrode II (6) of the spark gap (4) and input terminal II (3), whereas one end of the primary winding (15) of the transformer (13) is connected in series to a gas discharge tube (10), varistor II (9), resistor (11) and capacitor (12), connected to the other end of the primary winding (15) of the transformer (13), connected to input terminal II (3), whereas the junctor connecting varistor II (9) to the resistor (11) is interconnected with the junctor, connecting input terminal clamp I (2) with main electrode I (5) of the spark gap (4). The advantageous design of the triggering circuit (1) of the overvoltage protection provides a thermo- sensitive disconnector (17), thermally coupled (16) to varistor II (9), which is either connected in series to varistor II (9), or is connected in a junctor between the junction connecting varistor II (9) to the resistor (11) and the junction connecting input terminal I (2) to main electrode I (5) of the spark gap (4), or the thermo-sensitive disconnector (17) is connected between the primary winding (15) of the transformer (13) and the gas discharge tube (10). |
