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文件名称：EMC技术汇总
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更新时间：2022-05-10 12:55:41
EMC技术汇
古老的标准，有新问题。在 4.1.1.2 里，有下面这段：
4.1.1.2 On additional terminals of appliances as well as on load and additional terminals of
regulating controls incorporating semiconductor devices the relaxed limits given for "additional
terminals" in columns 4 and 5 apply.……
No terminal voltage limits apply for leads, which are not easily extensible by the user
(permanently connected, or provided with a specific connector), which are shorter than 2 m,
and which connect the equipment with an auxiliary apparatus or device, (e.g. semiconductor
speed controls, power plugs with AC-DC converters).
可以这样理解，在 lead between the appliance and the auxiliary apparatus is permanently fixed
at both ends and shorter than 2 m, or lead between the appliance and the auxiliary apparatus
is permanently fixed at both ends and it has a shielding whose ends are connected to the
metal housing of the appliance and that of the auxiliary apparatus 的两种情况下，可以不做负
载端。所以，三个条件不完全是 and 的关系，而是部分 and，也就是说至少短于 2m 不是不做负
载端传导骚扰电压测试的必要条件。长于 2m，但有金属屏蔽可以不做，这个要跟空调厂家说清
楚。 另外，接着上面还有一段