CSA C22.2 NO. 66.2:21 (R2025)

Description

Preface This is the harmonized CSA Group and UL standard for low voltage transformers . It is the second edition of CSA C22.2 No. 66.2 and the second edition of UL 5085-2. This edition of CSA C22.2 No. 66.2/UL 5085-2 supersedes the previous edition published on April, 2006. This harmonized Standard was prepared by a Technical Harmonization Committee comprised of members from CSA Group, Underwriters Laboratories Inc. (UL), and representatives of the low voltage transformer manufacturing industry. The efforts and support of members of the Technical Harmonization Committee are gratefully acknowledged. This Standard is considered suitable for use for conformity assessment within the stated scope of the Standard. This Standard was reviewed by the CSA Subcommittee on Specialty Transformers, under the jurisdiction of the CSA Technical Committee on Industrial Products and the CSA Strategic Steering Committee on Requirements for Electrical Safety, and has been formally approved by the CSA Technical Committee. Scope 1.1 As noted in Low Voltage Transformers – Part 1: General Requirements, UL 5085-1, or CSA C22.2 No. 66.1, Low Voltage Transformers – Part 1: General Requirements, the requirements of Part 2 cover: a) Air-cooled transformers and reactors for general use; b) Autotransformers; c) Ferroresonant transformers; d) Cord-connected transformers; and e) Transformers incorporating overcurrent or over-temperature protective devices, transient voltage surge protectors, or capacitors. 1.7 These requirements do not cover Class 2 and Class 3 transformers (which are evaluated in Part 3). 1.8 Part 2 is intended to be used in conjunction with Part 1. The numbering of the clauses in Part 2 corresponds to the numbered clauses in Part 1. The requirements in Part 1 apply unless modified by Part 2.