This standard is to be read in conjunction withANSI/ISA-61241-0, the requirements of which apply toelectrical apparatus protected by encapsulation and surfacetemperature limitation unless specifically excluded.
This standard is applicable to electrical apparatusprotected by encapsulation type of protection “mD” and surfacetemperature limitation for use in areas where combustible dust maybe present in quantities which could lead to a fire or explosionhazard. It specifies requirements for design, construction andtesting of electrical apparatus, parts of electrical apparatus andEx components where the rated voltage does not exceed 10 kV.
NOTE 1 The actual working voltage may exceed the value givenabove by up to 10 %.
NOTE 2 Apparatus within the scope of this standard may also besubjected to additional requirements in other standards – forexample, IEC ANSI/ISA-60079-0 (“Electrical apparatus forexplosive gas atmospheres – Part 0: General requirements”).
The application of electrical apparatus in atmospheres which maycontain explosive gas as well as combustible dust, whethersimultaneously or separately, requires additional protectivemeasures.
This standard does not apply to dusts of explosives which do notrequire atmospheric oxygen for combustion, or to pyrophoricsubstances.
his standard is not applicable to electrical apparatus intendedfor use in underground parts of mines as well as those parts ofsurface installations of such mines endangered by firedamp and/orcombustible dust. This standard does not take account of any riskdue to an emission of flammable or toxic gas from the dust.
This standard does not include other types of protection and isonly applicable to protection by encapsulation.
- Edition:
- 06
- Published:
- 06/27/2006
- Number of Pages:
- 44
- File Size:
- 1 file , 280 KB
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