IEC 60512-23-3:20 18 RLV包含IEC官方国际标准及其红线版本。Redline版本不是官方文档，它只有英文版本，为您提供了一种快速简单的方法来比较IEC官方标准与其以前版本之间的所有变化。 ？ IEC 60512-23-3:20 18。定义了一种标准测试方法，用于测量屏蔽连接器或未配备整体屏蔽的连接器的屏蔽有效性SE，一旦安装了屏蔽附件并用屏蔽电缆端接。整个组件在其整个长度上具有连续的360°屏蔽能力。本试验方法适用于屏蔽连接器和具有屏蔽能力的连接器附件。可以测试以下不同的连接器设计:-圆形连接器； -矩形连接器； -用于印刷电路板的连接器； -连接器屏蔽附件。 该测试方法利用连接器/附件/电缆组件的固有屏蔽特性是其表面传输阻抗ZT的原理，该表面传输阻抗ZT可以表示为屏蔽内部相对于外壳上的电流的纵向电压。该测试也适用于测量连接器的屏蔽有效性，该连接器配有三轴触点，端接有屏蔽双绞线，如数据总线系统中使用的。第二版取消并取代了2000年出版的第一版。本版构成技术修订版。与上一版相比，此版本包括以下重大技术变更:a)鉴于同一系列中的并行试验方法23g，增加了引言，为本文件提供一些指导； b)该测试方法被认为可靠的频率范围从1 GHz移动到3 GHz，以与图7（不变）和当前行业实践和需求一致； c)对先前规范性参考IEC 60096-4-1:19 90的IEC 62153-4-6:20 17的更新，已撤回且不正确（应为IEC 61196-1:19 95，也已撤回）； d)更新IEC 62153-4-6:20 17的当前子条款编号IEC 61196-1:19 95中引用的先前子条款编号（错误地归因于IEC 60096-4-1:19 90）。为了便于理解，增加了这些子条款的标题； e）将标题与SC 48B（连接器）的当前范围保持一致，并将电气设备作为所述连接器的目标应用（根据TC 48的当前范围），并明确提及用于测量传输阻抗的方法——线注入; f)在整个文档中添加了用于屏蔽有效性的符号SE和用于表面转移阻抗的ZT； g)试验方法适用的连接器列表——先前在3.1中——范围内移动； h)AECMA组织的前名称更改为当前的ASD-STAN； i)在整个文件中使用“样本”而不是“样本”； j)在标题中澄清表3中描述的传输阻抗及其编辑改进； k)“介电常数”变更为更新后的术语“相对介电常数”； l）增加了一个注释，警告该测试方法在6.6中要求TDR具有比IEC 62153-4-6和EN 50289中规定的小于350 ps的更严格的上升时间小于100 ps的值-1-6，用于应用于屏蔽电缆的类似线路注入方法，而IEC 60512的测试23g-图23-7为相同目的指定了具有小于200ps的上升时间的TDR； m)采用术语“连接器外壳”[IEV 581-27-10]而不是“外壳”来描述提供屏蔽的连接器附件； n)在图7的双对数图左侧的纵坐标轴上添加标题“传输阻抗ZT[Ω]”； o）添加了解释性说明，以澄清SE从ZT的换算公式。 关键词:连接器、筛选过滤试验、屏蔽效能

IEC 60512-23-3:2018 RLV contains both the official IEC International Standard and its Redline version. The Redline version is not an official document, it is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition.
？ IEC 60512-23-3:2018. defines a standard test method for measuring the shielding effectiveness SE of a shielded connector, or of a connector not provided with integral shield once fitted with a shielding accessory and terminated with a screened cable. The complete assembly has a continuous 360° shielding capability throughout its length. This test method can be applied to shielded connectors and to connector accessories with shielding capability. The following different connector designs can be tested:
- circular connectors;
- rectangular connectors;
- connectors for printed boards;
- connector shielding accessories.
This test method utilizes the principle that the intrinsic shielding property of the connector/ accessory/cable assembly is its surface transfer impedance ZT which can be expressed as the longitudinal voltage inside the shield, relative to the current flow on the outside shell. This test is also suitable for measuring the shielding effectiveness of a connector fitted with triaxial contacts terminated with shielded, twisted pair cables, as used in data bus systems. This second edition cancels and replaces the first edition, published in 2000. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) an introduction has been added to provide some guidance to this document in view of concurrent test method 23g in the same family;
b) the frequency range for which this test method is considered reliable moved from 1 GHz to 3 GHz, to be consistent with Figure 7 (unchanged) and current industry practice and need;
c) update to IEC 62153-4-6:2017 of former normative reference IEC 60096-4-1:1990, withdrawn and incorrect (should have been IEC 61196-1:1995, also withdrawn);
d) update to current subclause numbers of IEC 62153-4-6:2017 what were the previous subclause numbers referenced in IEC 61196-1:1995 (wrongly attributed to IEC 60096-4-1:1990). For immediate understanding the title of these subclauses has been added;
e) alignment of title to the current scope of SC 48B (connectors) and inclusion of electrical equipment as target application of said connectors (per current scope of TC 48) and explicit reference to the method – line injection – for the measurement of transfer impedance;
f) symbols SE for shielding effectiveness and ZT for surface transfer impedance added throughout the document;
g) list of connectors to which the test method is applicable – previously in 3.1 – moved in scope;
h) former name of AECMA organization changed to the current ASD-STAN;
i) “specimen” used instead of “sample” throughout the document;
j) clarification in the title of what transfer impedance is described in Table 3 and editorial improvement of the same;
k) “dielectric constant” changed into the updated term “relative permittivity”;
l) added a note to warn about the fact that this test method requires in 6.6 a TDR with more stringent rise time of less than 100 ps than the value of less than 350 ps specified both in IEC 62153-4-6 and in EN 50289-1-6 for the similar line injection method applied to screened cables, whereas test 23g of IEC 60512-23-7 specifies for the same purpose a TDR with a rise time of less than 200 ps;
m) adoption of term “connector housing” [IEV 581-27-10] instead of “shell” to address the connector accessory providing the shielding;
n) title “Transfer impedance ZT [Ω]” added to the ordinate axis on the left side of double log diagram of Figure 7;
o) explanatory note to clarify the conversion formula for SE from ZT added.
Key words: Connectors, Screening and Filtering Tests, Shielding Effectiveness