DMC designed a control system for centrifuge for the client that would be used in a Class 1 Division 2 (C1D2) Enclosure with a purge system.
The NFPA Publication 70, NEC, and CEC defines Class II locations as those in which combustible dust may be found. The subcategory of divisions that the classes are further subdivided into define the likelihood of the hazardous material being present in a flammable concentration.
Division 2 is defined as follows:
“In which ignitable concentrations of hazards are handles, processed, or used, but which are normally in closed containers or closed systems from which they can only escape through accidental rupture or breakdown of such containers or systems.
We used a Factory Acceptance Test (FAT) because the hazardous environment was not present. This FAT tested functionality and verified that, if someone were to open the door, the purge would be lost and that we killed power to the entire panel. Overall, the test proves that we eliminated the risk.
Our engineers provided support in successfully completing this project the client had already started. With our expertise and programming experience, we successfully provided a solution that can operate in a C1D2 hazardous environment.
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