1784-PCIC 1784-PCIC
供电干扰是指各种电气设备从同一电源系统获得供电时,由其他设备在电源系统中产生的干扰。处理措施:
(1) 变频器的控制电源由另外系统供电。
(2) 在控制电源的输入侧装设线路滤波器。
(3) 装设隔离变压器,且屏蔽层接地。
5、接地干扰
接地干扰是指机体接地和信号接地。对于弱电压电流回路及任何不合理的接地均可诱发的各种干扰,如设置2个以上接地点,接地处会有电位差,产生干扰,处理措施如下:
(1)速度给定信号的控制电缆屏蔽层仅一点接地。屏蔽层不应作为信号的通路使用。
(2)电缆的接地在变频器侧进行,使用专设的接地端子,不与其他接地端子共用,并尽量减小接地端子的对地电阻,一般不大于10Ω。
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3RA1323-8XB30-1BW4 CONTACTOR,REVERS,S0,9A,48 VDC,3P,SCRW Siemens
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