本标准是对IEC 61558-2-8第二版《电力变压器、电源、电抗器及其组合的安全——第2-8部分:钟声和钟声用变压器和电源装置的特殊要求》进行国家修改后采用的。本第2部分必须与最新版AS/NZS 61558.1《电力变压器、电源、电抗器和类似产品的安全——第1部分:一般要求和试验及其修订版》结合使用。它是在该标准2008年版的基础上建立的。第1部分的修正和修订也必须考虑在内，此类变更的适用日期将在第1部分的相关修正或修订中说明。主要变更包括根据AS/NZS 61558.1:2008更新本部分。IEC 61558-2-8第2版的国家变更构成了澳大利亚和新西兰的国家变更，用于IECEE电气设备安全标准测试结果认可计划（CB计划）。

This Standard is an adoption with national modifications of the second edition of IEC 61558-2-8, Safety of Power Transformers, Power Supplies, Reactors and combinations thereof - Part 2-8: Particular requirements for transformers and power supply units for bells and chimes. This part 2 has to be used in conjunction with the latest edition of AS/NZS 61558.1 Safety of Power Transformers, Power Supplies, Reactors and Similar Products - Part 1: General requirements and tests and its amendments. It was established on the basis of the 2008 edition of that standard. Amendments and revisions of Part 1 have also to be taken into account and the dates when such changes become applicable will be stated in the relevant amendment or revision of Part 1. The main changes consist of updating this part in accordance with AS/NZS 61558.1:2008. The national variations to the IEC 61558-2-8 Ed 2 form the Australian and New Zealand national variations for purposes of the IECEE scheme for recognition of results of testing to standards for safety of electrical equipment (the CB scheme).