Equipment Protection Level

Equipment Protection Level (EPL) is a system to clearly indicate the inherent ignition risk of equipment, no matter what type of protection is used.

Equipment Protection Level
EPL Application Description Zone
Ga Gas equipment for explosive gas atmospheres, having a "very high" level of protection, which is not a source of ignition in normal operation, during expected malfunctions or during rare malfunctions 0, 1, 2
Gb Gas equipment for explosive gas atmospheres, having a "high" level of protection, which is not a source of ignition in normal operation or during expected malfunctions, 1, 2
Gc Gas equipment for explosive gas atmospheres, having a "enhanced" level of protection, which is not a source of ignition in normal operation and which may have some additional protection to ensure that it remains inactive as an ignition source in the case of regular expected occurrences (for example failure of a lamp) 2
Da Dust equipment for explosive dust atmospheres, having a "very high" level of protection, which is not a source of ignition in normal operation, during expected malfunctions, or during rare malfunctions 20, 21, 22
Db Dust equipment for explosive dust atmospheres, having a "high" level of protection, which is not a source of ignition in normal operation or during expected malfunctions 21, 22
Dc Dust equipment for explosive dust atmospheres, having a "enhanced" level of protection, which is not a source of ignition in normal operation and which may have some additional protection to ensure that it remains inactive as an ignition source in the case of regular expected occurrences (for example failure of a lamp) 22

Source: IEC 60079

EPL marking on equipment is now common as indicated in this IECEx Certificate of Conformity IECEx SIR 09.0124X. This equipment is marked "Ex ia IIC Ga".

1688 = 1683 = 1703

About the Author

Ver Pangonilo
A Filipino Engineer, Registered Professional Engineer of Queensland (RPEQ) - Australia and Professional Electrical Engineer (PEE) - Philippines with extensive experience in concept select, front-end engineering, HV & LV detail design, construction and commissioning of Hazardous and Non-Hazardous Area electrical installations in water and waste water pipeline and pumping facilities, offshore platforms, hydrocarbon process plants and pipelines including related facilities. Hazardous area classification and design certification (UEENEEM015B, UEENEEM016B, UEENEEM017B).
Facebook Auto Publish Powered By : XYZScripts.com