While fixed electrical control panels are a common feature in hazardous areas, some equipment, especially mobile service equipment, requires a special solution. This application note describes a project to adapt a portable oil cleaning system and develop a mobile, plug-and-play, purged and pressurised enclosure for use in Hazardous Areas ATEX/IECEx Zone 2.
To enable an Ex p solution, the oil cleaning system is installed inside a custom designed moveable IP66 enclosure. The enclosure is designed in such a way as to give access for moving the machine in and out, as well as maintenance access to key components.
Although intended for use in a Zone 2 environment, the Expo enclosure is fitted with both an X-purge (Size 1) and MIU (dX) to provide improved operational security, especially in unmanned locations.
Challenges and design considerations included:
This specific project had the following requirements. However the application could be extended to Zone 1, Class I Div 1.