Alternating Current [AC]

The Banana Skin columns were compiled by Keith Armstrong, of Cherry Clough Consultants Ltd, from items he found in various publications, and anecdotes and links sent in by the many fans of the column.

The Banana Skin columns were compiled by Keith Armstrong, of Cherry Clough Consultants Ltd, from items he found in various publications, and anecdotes and links sent in by the many fans of the column.

South Korea has several mandatory product certifications covering many different product categories. The most important one is the KC certification, which applies to a large variety of products and is comprised of different certification modes.

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.

Product markings and labels provide information about the product, installation, and use. The markings and labels can also provide warnings to avoid hazardous energy transfer to a body part. The product safety aspects of markings for identification, ratings, functions, connections, and warnings are described.