IEC 62368-1

This article discusses additional requirements that designers and safety professionals may want to consider beyond the base standard for their product based on the environment and user exposure.

This article discusses the legislation that applies when placing radio equipment on the Saudi market. For product manufacturers intent on exporting radio equipment to Saudi Arabia, the fact that the relevant legislation was adopted at the national level is significant. The article gives an overview of the Saudi legal framework, including obligations falling upon radio equipment manufacturers and importers.

This article discusses the IEC 60601 Amendments Project, for Medical Electrical Safety, some of the changes to the General and Collateral Standards of the Project, and their impact on manufacturers. The future of the 60601 series of standards is also discussed.

Product standards, such as IEC 62368‑1 for ITC equipment, struggle to keep up with technology changes, even when they are designed to be adaptable – such as this hazard-based standard. Unexpected consequences can develop with the introduction of disruptive technology that takes advantage of a seeming loophole in a standard and move forward without getting a full evaluation under the standard. Fault managed power systems, such as PoE, push the standard in getting proper evaluation. This paper is a case study including a detailed proposal as to how to address an issue such as this within the standard.

This article analyzes the V-I characteristic of a varistor and shows it is more appropriate to treat the varistor as a current dependent resistance rather than the conventionally taught voltage dependent resistance. Spice circuit examples are given, based on a current dependent resistance varistor model.