2021KS C IEC 61241-1-2021 Electrical apparatus for use in the presence of combustible dust-Part 1:Protection by enclosures “tD”
0000 KS C IEC 61241-1-1-2003(2018)
0000 KS C IEC 61241-1-2006(2016)
2006KS C IEC 61241-1:2006 Electrical apparatus for use in the presence of combustible dust-Part 1:Protection by enclosures “tD”
2003KS C IEC 61241-1-1:2003 Electrical apparatus for use in the presence of combustible dust-Electrical apparatus protected by enclosures and surface temperature limitation-Specification for apparatus