DS200TBQCG1ABB GE

3HAC17756-4 ABB []ABB
3HAC17796-2 ABB
3HAC17970-1 DSQC328A ABB
3HAC18100-1 ABB
3HAC1818-1 ABB
3HAC1938-2 ABB
3HAC2132-1 ABB
3HAC2298-1 ABB –
3HAC2353-1 ABB

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描述

PLC系统的正常供电电源均由电网供电。由于电网覆盖范围广,它将受到所有空间电磁干扰而在线路上感应电压和电路。尤其是电网内部的变化,入开关操作浪涌、大型电力设备起停、交直流传动装置引起的谐波、电网短路暂态冲击等,都通过输电线路传到电源原边。PLC电源通常采用隔离电源,但其机构及制造工艺因素使其隔离性并不理想。实际上,由于分布参数特别是分布电容的存在,绝对隔离是不可能的。

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