Rechercher

Provides an accelerated means of assessing the effect of tarnishing on silver and silver alloys used for contacts and connections. Is particularly suitable for comparative information, but not as a general corrosion test, i.e. it may not predict the behaviour of contacts and connections in industrial atmospheres. The objects are: a) to determine the influence of atmospheres containing hydrogen…

Cet essai a pour but de fournir une procédure accélérée pour vérifier les effets du ternissement de l'argent et des alliages d'argent utilisés dans les contacts et connexions. Il est particulièrement adapté pour donner des informations sur une base comparative, mais ne convient pas comme essai général de corrosion, c'est-à-dire qu'il ne permet pas de prédire le comportement…

Applies to three-phase and single-phase transformers including autotransformers. Defines the rating and connection symbols. Gives certain specifications for transformers having a tapped winding. Defines information which shall be marked on the rating plate and the tests to be conducted. Supersedes IEC 76(1967) and IEC 76-4 (1976).

Contains 16 definitions relating to coils and core material, and also describes the information which should be contained in an article sheet.

Contient 16 définitions applicables aux bobines et au matériau constitutif des noyaux tout en donnant les informations qui doivent figurer dans une feuille particulière.

Specifies procedure for comparison of the acoustical performance of various types of household or similar sound radio receivers. Gives requirements for programme, the test room, number and qualification of members of the panel and the conditions in which they work. The listening tests are carried out by comparison against a reference receiver. The subjective evaluation, based on this guide,…

Contains tables indicating comparative constructions of flexible cords similar to those included in IEC 227 and IEC 245, but which have been used in North America. Provides information for use during the period of time necessary for harmonization to take place from North American types towards the adoption of IEC standards. This information should be of value to those who are concerned with…

Comporte des tableaux permettant la comparaison des fabrications de câbles souples analogues à ceux de la CEI 227 et de la CEI 245, avec les câbles souples utilisés en Amérique du Nord. Fournit des informations utiles en attendant l'harmonisation des câbles nord-américains par l'adoption des normes de la CEI. Ces informations devraient être utiles à ceux qui s'occupent d'…

Gives information to serve as a guide for the future design of toroids (ring cores) of rectangular cross-section, made of magnetic oxides or iron powder, for pulse and broadband transformers. Toroidal magnetic strip-wound cores form the subject of a separate publication.

Applies to storage oscilloscopes with special devices incorporated in the cathode-ray tube permitting the recording of a signal in another way than by the ability of the screen coating to ensure persistence of the display of information.