实验室工程师知识点分享：IEC 60065 14.1 章节对音视频产品DC Resistors的要求，建议技术人员必看！

IEC 60065 Sub-clause 14.1对音视频产品 DC Resistors 要求如下：
 
若产品申请IEC 60065，若有使用Resistor 在Fuse 前的L/N 两端或连接PRI and SEC,线路之间，有以下方式可符合要求：
 

(1) 该电阻有相关的安规认证并符合标准，例如UL CCN (FPAV 2)。 
 
(2) 依IEC 60065之条文1.4.1 4Reststor 对该电阻执行以下两项测试并符合要求：

a). For resistors connected between HAZARDOUS LIVE parts and ACCESSIBLE conductive parts and for resistors bridging contact gaps of MAINS SWITCHES, the 10 specimens are each subjected to 50 discharges at a maximum rate of 12/min, from a 1 nF capacitor charged to 10 kV in a test circuit as shown in figure 5A.   

After this the value of resistance shall not differ more than 20% from the value measured before -the damp heat test.
No failure is allowed. 

b)For other resistors, the 10 specimens are each subjected to a voltage of such a value that the  current through it is 1,5 times the value measured through a resistor, having a resistance equal to the specified rated value, which is fitted to the apparatus, when operated under fault conditions, During the test the voltage is kept constant.  

The value of resistance is measured when steady state is attained and shall not differ more than 20% from the value measured before the damp heat test. 

No failure is allowed.  

(3)  UL 可接受该电阻依UL 60950-1的相关章节要求，对该电阻评估相关条文，测试及结构评估并符合要求，亦可接受，依UL 60065 Sub-clause 1.4.1如下：  

Component power supplies and their resistors complying with the construction and test requirements of UL 1310, UL 1950, Third Edition, or UL 60950 are considered to fulfill the construction and test requirements of 14.1.