IEC 60079-26:2006/COR1:2009
Explosive atmospheres - Part 26: Equipment with equipment protection level (EPL) Ga - Corrigendum 1

Standard No.

IEC 60079-26:2006/COR1:2009

Release Date

2009

Published By

International Electrotechnical Commission (IEC)

Status

Withdraw

Replace By

IEC 60079-26:2014 RLV

Latest

IEC 60079-26:2021

Scope

This part of IEC 60079 specifies the particular requirements for construction@ test and marking for electrical equipment that provides equipment protection level (EPL) Ga. This electrical equipment@ within the operational parameters specified by the manufacturer@ ensures a very high level of protection that includes rare faults related to the equipment or two faults occurring independently of each other. NOTE 1 ?A malfunction may result from a failure of the component parts of the electrical equipment or from anticipated externally applied influences. Two independent malfunctions which may occur more frequently and which@ separately@ would not create an ignition hazard but which@ in combination@ could create a potential ignition hazard@ should be regarded as occurring together to form a rare fault. NOTE 2? This electrical equipment is intended for use in zone 0 hazardous areas@ in which explosive gas atmospheres caused by mixtures of air and gases@ vapours or mists under normal atmospheric conditions are present continuously@ for long periods or frequently. This standard also applies to equipment mounted across a boundary where different protection levels may be required. EXAMPLE: In the wall of a storage vessel containing zone 0 with an ambient defined as zone 1. This standard also applies to equipment installed in an area requiring a lower protection level@ but electrically connected to equipment with equipment protection level (EPL) Ga (associated apparatus). This standard supplements the general requirements in IEC 60079-0 and the requirements of the standardized types of protection@ in accordance with the IEC 60079 series@ to adapt the level of safety provided by those standards in order to provide EPL Ga. NOTE 3 ?In designing equipment for operation in explosive gas atmospheres under conditions other than the atmospheric conditions given in IEC 60079-0@ this standard may be used as a guide. However@ additional testing is recommended related specifically to the intended conditions of use. This is particularly important when the types of protection ??Flameproof enclosures?? (IEC 60079-1) and ??Intrinsic safety?? (IEC 60079-11) are applied. NOTE 4? The classification of hazardous areas in zones is defined in IEC 60079-10. NOTE 5? There may be other non-electrical sources of ignition (for example ultrasonic@ optical or ionizing radiation) that are not addressed by this standard; these should also be taken into consideration (see@ for example@ EN 1127-1). NOTE 6 ?This concept provides equipment protection level (EPL) Ga. For further information@ see Annex A.

IEC 60079-26:2006/COR1:2009 history

• 2021 IEC 60079-26:2021 Explosive atmospheres - Part 26: Equipment with Separation Elements or combined Levels of Protection
• 0000 IEC 60079-26:2014 RLV
• 2009 IEC 60079-26:2006/COR1:2009 Explosive atmospheres - Part 26: Equipment with equipment protection level (EPL) Ga - Corrigendum 1
• 2006 IEC 60079-26:2006 Explosive atmospheres - Part 26: Equipment with equipment protection level (EPL) Ga
• 2004 IEC 60079-26:2004 Electrical apparatus for explosive gas atmospheres - Part 26: Construction, test and marking of group II zone 0 electrical apparatus