IEC 61558-2-1:2021 PDF Download

IEC 61558-2-1:2021 is a standard that focuses on the safety requirements and tests for separating transformers and power supply units incorporating separating transformers for general applications. This standard is applicable to transformers that are designed to provide electrical isolation between the input and output circuits, as well as power supply units that incorporate such transformers.

The third edition of this standard, published in 2021, replaces the second edition published in 2007 and introduces several technical revisions. Some of the key changes include the adjustment of structure and references in accordance with IEC 61558-1:2017, the relocation of construction descriptions to IEC 61558-1:2017, and the introduction of a new symbol for power supply units with linearly regulated output voltage.

It is important to note that this standard is intended to be used in conjunction with IEC 61558-1:2017, which provides the general requirements for transformers, reactors, and power supply units.