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Published 29 May 2020
Purging & Pressurizing Techniques in hazardous locations. Purging is a method where a flow of air or inert gas is maintained in an enclosure installed in a classified hazardous area to prevent or reduce the risk of explosive atmosphere occurring. Pressurizing is a method where the pressure of air...
Published 29 May 2020
“Class I, Division 1” Electrical Rotating Machines Electrical machines with “Class I, Division 1” marking are based on “explosion-proof” design. In order to get “C1D1” marking, there are two steps: 1) Ordinary location requirement per standards CSA C22.2 No. 100 for Canada and UL 1004 for the USA. These...
Published 29 May 2020
Hazardous Locations Cable Glands (IECEx, ATEX and North American). Cable glands are used as cable entry devices to provide a safe connection of suitable cables to enclosures and maintain the ingress properties of the installation. In hazardous area classified areas they also need to maintain the explosion protection of...
Published 29 May 2020
The Importance of Grounding of Intrinsically Safe Devices in hazardous areas. Intrinsic safety is system concept and it prevents explosion in hazardous areas by limiting electrical energy. The IS device which is installed in a classified area needs to be connected to a source of power (IS barrier) by...
Published 29 May 2020
“Ex pyb“ Marking for Purging and Pressurization Technique for hazardous use in “Zone 1“. In accordance with standard IEC 60079-2, “Ex pyb” marking provides Equipment Protection Level (EPL) Gb with EPL Gc internal to the pressurized enclosure. It simply means the internal components must be evaluated against hazardous location ...
