IEC 61241-1-1:1999 Electrical apparatus for use in the presence of combustible dust - Part 1-1: Electrical apparatus protected by enclosures and surface temperature limitation - Specification for apparatus was changed to IEC 61241-1:2004 Electrical apparatus for use in the presence of combustible dust - Part 1: Protection by enclosures "tD".
IEC 61241-1-1:1999 Electrical apparatus for use in the presence of combustible dust - Part 1-1: Electrical apparatus protected by enclosures and surface temperature limitation - Specification for apparatus was changed to IEC 61241-0:2004 Electrical apparatus for use in the presence of combustible dust - Part 0: General requirements.
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