prosoft通讯模块PS69-DPS

PS69-DPS

为使传动系统无干扰运行，须采取措施保证高频时的有效接地，这就要求安装地面、电机及负载设备的外壳、变频器线路板与大地处于等电位。另外，正确的接地可有力削弱电机轴和机座的电压，减小高频轴电流，并对相-地绝缘电压有影响。

接地电缆的规格应符合相关标准（如GB 14711）和法规。

对于100kW以上电机，要求机座与负载机械之间搭接，这是为了实现等电位和提高接地效果。例如，电机接线盒处和机座底脚处的接地端子好用导线或金属编织带连起来。

大于30kW电机宜用单芯动力线和多根接地线对称配置的电缆以减小高频轴电流和电磁干扰。

如以屏蔽层作为防护导线，屏蔽层电导至少应达到主导体电导的50%，高频情况下至少要达到10%。电缆屏蔽应两端接地；如电缆两端须去除屏蔽层，那么去除长度应尽量短。

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