IEC 60938-2:20 21适用于为抑制电磁干扰而设计的固定电感器，该电感器将连接到标称电压不超过1 000 V AC RMS或标称频率不超过400 Hz的1 500 V DC的交流电源或其他电源。 本部分规范仅限于安全试验适用的固定电感器。这意味着，当必须符合附录A的强制性测试时，根据本规范规定的电感器将连接到市电电源，或者用于设备规范规定需要部分或全部这些安全测试的其他电路位置。 本文件的目的是规定从IEC 60938-1适当的测试方法，并给出抑制电感的一般性能要求。 与上一版相比，此版本包括以下重大技术变更: -性能测试的测试计划已被删除；附件B中的一个试验计划中列出了强制性安全试验和可选性能试验； -对晶闸管扼流圈的要求已被撤销； -材料要求符合IEC 60939-3和UL 60939-3； -高达1 000 V的交流扼流圈和高达1 500 V的直流扼流圈现已纳入范围。

IEC 60938-2:2021 applies to fixed inductors designed for electromagnetic interference suppression, which will be connected to an AC mains or other supply with a nominal voltage not exceeding 1 000 V AC RMS or 1 500 V DC with a nominal frequency not exceeding 400 Hz.
This sectional specification is restricted to fixed inductors for which safety tests are appropriate. This implies that inductors specified according to this specification will either be connected to mains supplies, when compliance with the mandatory tests of Annex A is necessary, or used in other circuit positions where the equipment specification prescribes that some or all of these safety tests are required.
The object of this document is to prescribe standard requirements for safety tests, preferred ratings and characteristics, to select from IEC 60938-1 the appropriate methods of test and to give general performance requirements for suppression inductors.
This edition includes the following significant technical changes with respect to the previous edition:
- the test plan for performance testing has been removed; mandatory safety tests and optional performance tests are listed in one test plan in Annex B;
- requirements for Thyristor-Chokes have been withdrawn;
- material requirements are harmonized with IEC 60939-3 and UL 60939-3;
- AC chokes up to 1 000 V and DC chokes up to 1 500 V are now in the Scope.