EN 55014-1 标准解读2

关于4.2.3.1的总体理解，其实我们应该注意到individual这个词，英文的意义是：单独的、单一的。因此我的理解是，只要这种开关操作频率不是很高，或者是“一次性的”，接通或者关断以后，需要人工再次干预的操作。当然这个要靠产品的特性决定，根据产品的使用场合、使用状态来决定，把握动作频率，我认为这是理解该条款的关键点。

4.2.3.2 Combination of clicks in a time frame less than 600 ms
In programme controlled appliances a combination of clicks in a time frame less than 600 ms is allowed once per selected programme cycle.
For other appliances such a combination of clicks is allowed once during the minimum observation time. This is also valid for thermostatically controlled three-phase switches, causing three disturbances sequentially in each of the three phases and the neutral. The
combination of clicks is considered as one click.

对于程序控制的器具，在每一个选择的程序周期允许有一个时间小于600ms的喀呖声组合。
对于其他器具，在最小观察时间内允许有这样的一个喀呖声组合，这也适用于恒温控制的三相开关在三相中的每相和中线中相继引起的三个
骚扰，这些喀呖声的组合被认为是一个喀呖声。

说实话，这种情况还没有见过，不知道该怎么做定论，根据我的理解，因为程序选择产生的click是允许有一个时间小于600ms的喀呖声组合。我现在对click的理解是，click自动分析仪会采集可能包含有会产生click的信号，然后根据click的定义来分解信号，来确定标准规定中的四个频点是否会在该程序选择的动作中产生click。以前的理解有误，请大家见谅。

4.2.3.3 Instantaneous switching
Appliances which fulfil the following conditions:
– the click rate is not more than 5,
– none of the caused clicks has a duration longer than 20 ms,
– 90 % of the caused clicks have a duration less than 10 ms,
shall be deemed to comply with the limits, independent of the amplitude of the clicks (see tables A.1 and A.2). If one of these conditions is not satisfied then the limits in accordance with 4.2.2 apply.

4.2.3.3 Instantaneous switching：瞬时开关动作
该条款描述了三个条件：
1、喀呖声率不大于5
2、没有持续时间长于20ms的喀呖声（时间长于20ms的喀呖声称为long click；时间小于20ms的click称为short click）
3、90%的喀呖声持续时间小于10ms。

如果同时满足上述三个条件，则认为click项目合格，到此为止停止测试，如果不满足上述三个条件，则需要进行第二轮的测试，
按照4.2.2中的公式，应用上四分法来确定click项目是否符合限值要求。

注：在应用4.2.2中的公式测试click项目是，分为两轮测试，runA 和runB。上述的三个条件是在runA的测试状态下判定的。
此外这里解释下最小观察时间的界定；在runA中，最小观察时间要满足最先产生40个click或者120min。两者中取最早发生的情形。

4.2.3.4 Separation of clicks less than 200 ms
For appliances which have a click rate less than 5, any two disturbances each having a maximum duration of 200 ms, shall be evaluated as two clicks even when the separation between the disturbances is less than 200 ms.
In this case, for instance observed with refrigerators, the example shown in Figure 4b, would be evaluated as two clicks and not as continuous disturbance.

4.2.3.4 喀呖声间隔时间小于200ms
对于喀呖声小于5的器具，任何两个持续时间最多为200ms的骚扰应评定为两个click，即使骚扰之间的间隔小于200ms。
在这种情况下，图4b所示观察到冷藏箱的骚扰，应判定为两个喀呖声，而不是连续骚扰。

针对4.2.3.4这个条款，除了标准中介绍的冷藏箱之外，目前还不知道有那个产品有这个特性，以后见到，在回来给大家补充。理解的不深刻，抱歉。

5 Methods of measurement of terminal disturbance voltages (148,5 kHz to 30 MHz)
This clause lays down the general requirements for the measurement of disturbance voltage produced at the terminals of apparatus.
The operating conditions are given in Clause 7 of this standard.

第五章，主要讲的传导的测量方法。

5.1 Measuring devices：测量设备
The measuring devices given below are to be used:

5.1.1 Measuring receivers：测量接收机
Receivers with quasi-peak detectors shall be in accordance with Clause 4 of CISPR 16-1-1;receivers with average detectors shall be in accordance with Clause 6 of CISPR 16-1-1.

NOTE Both detectors may be incorporated in a single receiver and measurements carried out either using the
quasi-peak detector or the average detector.