描述

1C31234G01

处理故障电容器应在断开电容器的断路器，拉开断路器两则的隔离开关，并对电容器组经放电电阻放电后进行。电容器组经放电电阻(放电变压器或放电电压互感器)放电以后，由于部分残存电荷一时放不尽，仍应进行一次人工放电。放电时先将接地线接地端接好，再用接地棒多次对电容器放电，直至无放电火花及放电声为止，然后将接地端固定好。由于故障电容器可能发生引线接触不良、内部断线或熔丝熔断等，因此有部分电荷可能未放尽，所以检修人员在接触故障电容器之前，还应戴上绝缘手套，先用短路线将故障电容器两极短接，然后方动手拆卸和更换。对于双星形接线的电容器组的中性线上，以及多个电容器的串接线上，还应单独进行放电。
电容器在变电所各种设备中属于可靠性比较薄弱的电器，它比同级电压的其他设备的绝缘较为薄弱，内部元件发热较多，而散热情况又欠佳，内部故障机会较多，制造电力电容器内部材料的可燃物成分又大，所以运行中极易着火。因此，对电力电容器的运行应尽可能地创造良好的低温和通风条件。

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1C31234G01

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