IEC 60512-9-3:20 11定义了一种标准测试方法，用于评估连接器在包括指定电气负载的操作模式下的机械和电气操作耐久性，即接合和分离循环。第二版取消并取代了1992年发布的IEC 60512-5的测试9c，并构成技术修订。与上一版相比，主要技术变化如下: -4.1的附加要求，规定如果为了测试而接线的电路多于一个，则接线应在并联电路中进行。 -删除第4.3至4.7款，代之以第4.2至4.4款。 本出版物应与IEC 60512-1:20 01和IEC 60512-1-100:2006一起阅读。

IEC 60512-9-3:2011 defines a standard test method to assess the mechanical and electrical operational endurance, i.e. engaging and separating cycles, of a connector in an operating mode which includes a specified electrical load. This second edition cancels and replaces Test 9c of IEC 60512-5, issued in 1992, and constitutes a technical revision. The main technical changes with regard to the previous edition are as follows:
- An additional requirement to 4.1 stating that if more than one electrical circuit is wired for testing, the wiring shall be carried out in a parallel electrical circuit.
- Subclauses 4.3 through 4.7 were removed and replaced by 4.2 through 4.4.

This publication is to be read in conjunction with IEC 60512-1:2001 and IEC 60512-1-100:2006.