| 摘要 |
<p>Provided is a gas-insulated switchgear wherein the reliability of the secondary circuit of a transformer is improved to stabilize a power system. A cylindrical bus container (1) is filled with an insulating gas and sealed, and a main circuit conductor (2) is contained therein. The bus container (1) has a flange (3). A transformer container (4) is provided adjacent to the bus container (1). The transformer container (4) comprises an inner cylinder (5) and an outer cylinder (6). Three transformers (11) are provided about an outer surface of the inner cylinder (5) via an insulating cushioning material (10). An insulating gap (9) is formed between the other longitudinal end of the inner cylinder (5) and the bus container (1). A varistor (nonlinear resistor) (15), the resistance of which varies with the magnitude of a voltage applied thereto, is electrically connected by a connecting conductor (16) between the inner cylinder (5) and the outer cylinder (6) on the side of the insulating gap (9). The varistor (15) is rendered conductive when a surge voltage, which is higher than a predetermined value, is applied to thereto.</p> |
