Full Description

Scope

For a fuse using a replaceable fuse link, Test Series 4 uses tests at two values of current It1 and It2, higher and lower currents than a "transfer current". The definition of which is the higher and which the lower is not consistent in 9.2.2.2.3, due to the transposition of the two terms in one location. In addition, after experience has been gained in performing testing as specified in 9.2.2.2.3 and Table 5, it has been found that, particularly for certain designs of fuse, additional clarification of the procedures to be used and modification to the testing would be helpful, and in some cases necessary, to achieve the desired results. Modification of 9.2.2.2.3 is therefore proposed. It has also been found that the wording of 18.1.1.3 may be ambiguous, leading to more than one method of performing the tests. This will be clarified.

Purpose

This standard specifies the minimum testing requirements for fuses and related devices. Such standardization is needed to ensure uniform minimum product testing for devices within the document scope. Test areas covered are based on historical experience.

Abstract

Corrigendum Standard - Active.Corrigenda concerning required procedures for performing design tests for high-voltage fuses are specified. These design tests, are appropriate to expulsion fuses, and cover interrupting tests and fuses using polymeric insulators.

Product Details

Published: 01/12/2018 ISBN(s): 9781504446044 Number of Pages: 15 File Size: 1 file , 2.4 MB Product Code(s): STD22947