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保险丝使用寿命测试评估四步曲

2018-12-13 10:03:20 lipscall

在IEC标准中规定保险丝有“耐久性试验法”，而UL标准中无类似的规定。

IEC标准中保险丝的耐久性试验即是寿命试验，其方法是，保险丝在正常温度下使用直流电源测试：

1、额电流直到温度稳定下测电压降；

2、1.2倍额定电流1h 切断电流15min。循环100次；

3、通电1.5In 1h 测电压降；

4、同1法测电压降。

要求：试验前后电压降变化不应超过10[%]，且标识仍清楚可辩，端帽焊点不出现任何劣变.

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