JIS C2820-2008《测定电机电刷材料物理特性的试验规程》

This Standard specifies test procedures for determining the physical prop-
erties of brush materials for electrical machines, i.e. bulk density, hardness, resistiv-
ity, transverse strength and for determining the ash content.
NOTES 1 The properties determined by these tests are inherent in the brush
materials themselves as distinct from performance characteristics in
operation on electrical equipment.
It should be kept in mind that since brush materials are generally
brittle, porous materials, it is reasonable that their properties vary much
more than the same properties in metals.
Samples used for these tests shall be representative of the batch of
material involved using a recognized and/or agreed sampling procedure
or technique.
2 The International Standard corresponding to this Standard is as follows.