IEC 60667-2 pdf – Vulcanized fibre for electrical purposes – Part 2: Methods of test

IEC 60667-2 pdf – Vulcanized fibre for electrical purposes – Part 2: Methods of test
1scope
This part of lEC 60667 gives methods of test for vulcanized fibre sheets for electrical purposes.
Material made by combining with an adhesive several thicknesses of vulcanized fibre is notcovered by this document.
Materials which 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 reference
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 latest edition of the referenced document(including anyamendments) applies.
IEC 60641-2:2004, Pressboard and presspaper for electrical purposes – Part 2: Methods oftests
IEC 60667-3 (all parts)，Specification for vulcanized fibre for electrical purposes – Part 3:Specifications for individual materials
IEC 61621:1997,Dry, solid insulating materials – Resistance test to high-voltage, low-currentarc discharges
ISO 178:2019 , Plastics -Determination of flexural properties
ISO 287;2017,Paper and board – Determination of moisture content of a lot – Oven-dryingmethod
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.orglobp
3.1
specimen
rectangle of sheet cut to give dimensions from a roll or sheets drawn from selected units
3.2
test piece
quantity of sheet on which each single determination is carried out in accordance with the method of test
Note 1 to entry: It may be taken from a specimen; in some instances, it may be the specimen itself.
4 General notes on tests
Conditioning
4.1
Unless otherwise specified, the test specimens, after being cut, shall be conditioned in an atmosphere of 23 °C ± 2 K, and (50 ± 5) % RH and are tested in this atmosphere. The conditioning in relation to the thickness shall be as indicated in Table 1.