DANSK DSF/PREN IEC 60413 PDF

This document concerns carbon-based grades that are used for sliding electrical contacts, such as carbon brushes or pantograph strips. By extension, it is possible to use the test procedures of this document to all electrical sliding contacts for electrical transmission appliances and to other appliances of carbon-based materials (heat exchangers, bearings…). This document specifies uniformized procedures for determining their following properties: • density and porosity; • resistivity; • flexural strength; • hardness; • ash content. In addition, it provides recommendations on test procedures for other properties: • Mechanical properties: Charpy impact test, compression strength, tensile strength (Annex B). • Thermal properties: coefficient of thermal expansion, specific heat capacity, thermal conductivity (Annex C). The properties determined by these tests are inherent of the carbon-based materials themselves as distinct from performance characteristics in operation on electrical equipment (carbon brush in an electrical rotating machine, contact strips on a pantograph, etc.).