适用于总规范IEC 60939-1范围内用于抑制电磁干扰的无源滤波装置。 本分规范的范围仅限于适用于安全测试的无源滤波器单元。这意味着，当需要符合表3中的强制性试验时，根据本分规范规定的过滤器将连接到主电源，或在设备规范规定需要进行部分或全部安全试验的其他电路位置使用。 2005年11月勘误表的内容已包含在本副本中。

applies to passive filter units for electromagnetic interference suppression which fall within the scope of the Generic Specification IEC 60939-1. The scope of this Sectional specification is restricted to passive filter units for which safety tests are appropriate. This implies that filters specified according to this Sectional specification will either be connected to mains supplies, when compliance with the mandatory tests of Table 3 is necessary, or used in other circuit positions where the equipment specification prescribes that some or all of these safety tests are required. The contents of the corrigendum of November 2005 have been included in this copy.