Ferrite cores. Guidelines on dimensions and the limits of surface irregularities - ETD-cores for use in power supplies1 Scope This part of IEC 63093 specifies the dimensions that are of importance for mechanical interchangeability for a preferred range of ETD cores made of ferrite and the essential dimensions of coil formers to be used with them, as well the effective parameter values to be used in calculations involving them. It also gives guidelines on allowable limits of surface irregularities applicable to ETD cores. The specifications contained in this document

The requirements for the use of SF6 in electrical equipment have been confirmed

you can efficiently perform magnetic particle testing

or hydrogen embrittlement of metallic and other inorganic coatings

the graphite materials in pencils and liquid ink in pens)

Why should you use BS 6920-2

BS IEC 62895 specifies test methods and requirements for HVDC transmission power cable systems

With obedience and compliance of BS EN 61577-2

Note: The requirements for the protection of the outdoor equipment against the effects of direct lightning strikes are not covered by BS EN 60950‑22

Elastomer insulated fire resistant cables installers

textile-glass woven fabrics and fabrics made from carbon fibres or polyolefin tape yarns (see Bibliography)

but for the more general purpose of the testing of simple statistical hypotheses for proportions

The standard applies to the medical device lifecycle