BS IEC 61892-7:2007 pdf free.Mobile and fixedoffshore units—Electrical installations—Hazardous areas.
BS IEC 61892-7 This part of lEC 61892 contains provisions for hazardous areas classification and choice ofelectrical installation in hazardous areas in mobile and fixed offshore units, including pipeline,pumping or ‘pigging’stations,compressor stations and exposed location single buoymoorings, used in the offshore petroleum industry for drilling,processing and for storagepurposes.
lt applies to all installations,whether permanent,temporary，transportable or hand-held, toa.c. installations up to and including 35 000 V and d.c. installations up to and including750 V.(a.c. and d.c.voltages are nominal values).
This standard does not apply to electrical installations in rooms used for medical purposes, orin tankers.
The following referenced documents are indispensable for the application of this document.For dated references,only the edition cited applies. For undated references, the latest editionof the referenced document (including any amendments) applies.
IEC 60079-0:2007，Explosive atmospheres – Part 0: Equipment – General requirements
IEC 60079-1:2007，Explosive atmospheres – Part 1: Equipment protection by flameproofenclosure“d”
IEC 60079-2:2007，Explosive atmospheres – Part 2: Equipment protection by pressurizedenclosure“p”
IEC 60079-5:2007，Explosive atmospheres – Part 5: Equipment protection by powderfilling “q”
For the purposes of this document the terms and definitions given in IEC 61892-1 throughIEC 61892-6 and the following apply.
appropriate authority governmental body and/or classification society with whose rules a unit is required to comply.
area classification assessed division of a facility into hazardous and non-hazardous areas, and the subdivision ofthe hazardous areas into zones.
enclosed area any room or enclosure within which, in the absence of artificial ventilation, the ventilation wilbe limited and any flammable atmosphere will not be dispersed naturally.
enclosure all the walls which surround the live parts of electrical apparatus including doors,covers,cable entries, rods, spindles and shafts, ensuring the protection of the electrical apparatus.
explosive atmosphere mixture with air,under atmospheric conditions, of flammable substances in the form of gas,vapour, mist or dust, in which, after ignition, combustion spreads throughout the unconsumedmixture.BS IEC 61892-7 pdf download.