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51问答网 > 变压器空载合闸电流对变压器的主要影响是?

变压器空载合闸电流对变压器的主要影响是?

如题

2025-04-07 00:57:18

推荐回答（1个）

回答1：

变压器合闸涌流对对变压器的影响主要是电流变压器的冲击。
大型变压器的合闸涌流的幅度可以达到变压器额定电流的数倍甚至十几倍，持续时间达到数分钟，可能对变压器造成机械或热的损害，同时对系统造成较大的冲击。
好在定型的变压器在型式试验时都经过突发性短路或者更严酷的试验，一般都可以承受正常的合闸涌流的冲击。只是在保护整定时（特别是过流保护）应在动作幅值或动作时间上躲开合闸涌流，也可以采用在变压器投入时临时退出过流保护的方法，防止因涌流过大而跳闸。

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