EN 55014-3:2006+A1+A2解读3

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.

第五章主要讲的是传导的测量现场布置情况。

EN 55014-1其实也是从CISPR14转化过来的，CISPR的EMI产品标准中描述实验测试现场的布置，这和IEC的标准不同，EMS的测试布置在IEC61000-4系列中有详细的描述，

这可能是CISPR和IEC的分工不同的原因，看过他们的分工和他们下面的技术委员会的各自职责。但是从来都是走马观花地一掠而过，惭愧惭愧啊。

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

条款5.1讲解的是测量传导需要的设备。

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.

在测量传导时，用的是准峰值测量接收机和平均值测量接收机。

关于测量接收机的详细讲解在CISPR16-1-1中。有兴趣的朋友可以去翻阅下CISPR16系列的标准，个人认为对测量设备讲解的还是比较全面的，但是也比较难懂。

5.1.2 Artificial mains network：人工电源网络
The artificial mains V-network is required to provide a defined impedance at high frequencies between the terminals of the equipment under test and reference ground, and also to isolate the test circuit from unwanted radio-frequency signals on the supply mains.
The artificial mains V-network 50 Ω/50 μH (or 50 Ω/50 μH + 5 Ω) as defined in Clause 4 of CISPR 16-1-2 shall be used.
To ensure that, at the frequency of measurement, the impedance of the mains does not materially affect the impedance of the artificial mains V-network, a suitable radio-frequency impedance shall be inserted between the artificial mains V-network and the supply mains.
This impedance will also reduce the effect of unwanted signals which occur on the supply mains (see also 5.3).
The connection between the artificial mains V-network and the measuring receiver shall be made by means of a coaxial cable with a characteristic impedance of 50 Ω.

人工电源网络的详细讲解在CISPR16-1-2标准，里面详细讲解了人工电源网络的各种模型。人工电源网络的作用有两种，根据我个人的理解：
1、提供稳定的电压给EUT.
2、滤除其他干扰，避免影响EUT测量结果。

对于人工电源网络，其实也是一个非常重要的设备，有很多文章讲解这方面的知识。只是从应用的角度来说，我认为理解上述两点就够了，如果有兴趣的朋友可以继续研究下。

5.1.3 Voltage probe：电压探头
The voltage probe shall be used when measuring on terminals other than mains terminals (see 5.2.3.2) e.g. load and control terminals (5.2.4.4). The voltage probe shall also be used on mains terminals when the artificial mains V-network cannot be used without unduly
influencing the equipment under test or the test equipment, e.g. while measuring motors and heating devices operating at more than 25 A per phase.
The voltage probe contains a resistor having a resistance value of at least 1 500 Ω in series with a capacitor with a reactive value negligible to the resistance (in the range 150 kHz to 30 MHz) (see 5.2 of CISPR 16-1-2).
The measuring results shall be corrected according to the voltage division between the probe and the measuring set. For this correction only the resistive parts of the impedances shall be taken into account.
If the function of the equipment under test is affected by the impedance of the probe being too low, its impedance (at 50/60 Hz and at radio frequencies) shall be increased as needed (for example 15 kΩ in series with 500 pF).

电压探头，是在测试信号线和控制线的传导用的，由于家电中的很少有信号线和控制线要测量传导项目，一般很少用到。其详细的结构和电路在CISPR16-1-2中。

5.1.4 Artificial hand：模拟手
In order to simulate the influence of the user's hand, application of the artificial hand is required for hand held equipment during the disturbance voltage measurement.
The artificial hand consists of metal foil which is connected to one terminal (terminal M) of an RC element consisting of a capacitor of 220 pF ± 20 % in series with a resistor of 510 Ω ± 10 % (see Figure 8a); the other terminal of the RC element shall be connected to the reference ground of the measuring system (see CISPR 16-1-2). The RC element of the artificial hand may be incorporated in the housing of the artificial mains network.

模拟手是为了模拟人手接触设备时，造成的影响的。其详细的讲解在CISPR16-1-2中。下图是模拟手的等效电路。

现在的模拟手的电容和电阻都集成在人工电源网络中了，模拟手针对的情况，在稍后的测试安排中有详细的说明。