IEC 60667-1 pdf – Vulcanized fibre for electrical purposes – Part 1: Definitions and general requirements

IEC 60667-1 pdf – Vulcanized fibre for electrical purposes – Part 1: Definitions and general requirements
This part of IEC 60667 gives the definitions and general requirements for vulcanized fibresheets for electrical purposes. Materials made by combiningwith an adhesive severalthicknesses of vulcanized fibre are not covered by this document.
Materials that conform to this specification meet established levels of performance. However,
the selection of a material by a user for a specific application is based on the actualrequirements necessary for adequate performance in that application and not based on thisspecification alone.
Safety warning: it is the responsibility of the user of the methods contained or referred to in thisdocument to ensure that they are used in a safe manner.
2Normative references
The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document.For dated references, only the edition cited applies.
For undated’references,the latestedition of the referenced document (including anyamendments) applies.
IEC 60667-3 (all parts),Vulcanized fibre for electrical purposes – Part 3: Specifications forindividual materials
3Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and lIEC maintain terminological databases for use in standardization at the followingaddresses:
·IEC Electropedia: available at http://www.electropedia.orgl
. Iso Online browsing platform: available at http://www.iso.org/obp
3.1
vulcanized fibre
superimposed layers of specially prepared paper，chemically treated (gelatinized) so that thelaminae’ are virtually destroyed,with the production of a homogeneous mass of convertedcellulose that will not delaminate after 30 min of immersion in boiling water
Note 1 to entry: lt is supplied in the form of rolls or sheets.
4Classification
4.1General type
This type is considered as the general-purpose type. It possesses good physical and electricalproperties and can be processed satisfactorily by punching.
4.2 Fishpaper type
This type is intended primarily for applications involving difficult bending or forming operations.
It is available in thicknesses from 0,1 mm to 0,8 mm.
The classification and symbol of sheets shall be as given in Table 1.