| 单相接地电流不大时 |
| 添加时间：2022/1/13 15:29:02 浏览次数： |
| 单相接地电流不大时，电流流过零值时的电弧将自行熄灭，故障消失；单相接地电流大于30安时，产生稳定电弧，将形成持续性弧光接地，将会损坏设备并导致两相甚至三相短路；当接地电流大于10安小于30安时，有可能产生一种不稳定的间歇性电弧，随之将出现弧光过电压，幅值可达2．5至3倍相电压，足以危及整个电网的绝缘。在变压器的中性点装设消弧线圈形成的电感电流与电容电流相补偿，将使接地电流限止，甚至近于零，从而消除了保定平面设计培训 保定室内设计培训 保定厨房排烟 雄安管道通风 接地处的电弧以及由它产生和危害。 When the single-phase grounding current is small, the arc will extinguish automatically when the current flows through the zero value, and the fault will disappear; when the single-phase grounding current is greater than 30 A, stable arc will be generated, which will form a continuous arc grounding, which will damage the equipment and lead to two-phase or even three-phase short circuit; when the grounding current is greater than 10 A and less than 30 A, an unstable intermittent arc may be generated, followed by the arc The optical over-voltage, whose amplitude can reach 2.5 to 3 times of the phase voltage, is enough to endanger the insulation of the whole power grid. The compensation of inductance current and capacitance current formed by installing arc suppression coil at the neutral point of transformer will limit the grounding current, or even close to zero, so as to eliminate the arc at the grounding point and the hazards caused by it |
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