| 避雷器预防性试验方法 |
| 添加时间：2017/5/17 17:40:39 浏览次数： |
| 目前，避雷器预防性试验方法有两种：停电试验和每年雷雨季节前的带电测试。停电试验主要测量避雷器的绝缘电阻、直流1mA下的电压U1mA及75%U1mA下的泄漏电流。虽然这种方法是目前判断避雷器性能好坏最常用的方式，但由于其试验周期长并具有一定的盲目性，仅依靠停电试验对氧化锌避雷器性能作出判断是不够的。 Currently, there are two types of preventative test methods: the power failure test and the electric test before the thunderstorm season. The power failure test mainly measures the insulation resistance of the arrester, the voltage U1mA under 1mA and the leakage current under 75% U1mA. While this approach is the judge arrester performance is the most common way, but as a result of the test cycle is long and has a certain blindness, only rely on the power failure test on performance of zinc oxide lightning arrester is not enough to judge. 每年雷雨季节前的带电测试，是在运行电压下测试避雷器的全电流以及阻性电流。测试过程中由于距带电设备距离小、试验接线等因素存在一定的危险性。另外，我局主网目前有2个500kV变电站、12个220kV变电站，17个110kV变电站，且分布面积较广，每年雷雨季节前测试一次，工作量大，且由于避雷器劣化是一个渐进的过程，一年仅测试一次，是远远不够的。 The charged test before the thunderstorm season is the full current of the arrester and the resistance current under the operating voltage. Because of the distance from the electric equipment, the test wiring and other factors can be dangerous. In addition, our main currently has two 500 kv substation, 12 220 kv substation, 17, 110 kv substation, and has a wide distribution area, the thunderstorm season before test once a year, volume, and the degradation due to lightning arrester is a gradual process, test only once a year, it is not enough. |
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