使用隔离变压器主要是应对来自于电源的传导干扰。使用具有隔离层的隔离变压器，可以将绝人部分的传导干扰隔离在隔离变压器之前。同时还可以兼有电源电压变换的作用。隔离变压器常用于控制系统中的仪表、PLC，以及其他低压小功率用电设备的抗传导干扰。
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