ATEX Zone 2, 22

Zone 2, 22 means that there is no hazardous material present, but if there is, it is for less than 10 hours a year and in low concentration.

The hazardous area industry has been stuck in the past for decades by large manufacturing companies that wish their customers to believe there is no alternative to their long lead, heavy, very expensive and cumbersome Ex d flameproof enclosures for zone 2.

What they don’t tell you is that under the ATEX directive 60079-15, steel panel enclosure manufacturers such as indEx, can self-certify for zone 2, 22, and category 3 solutions.

Type “n” solutions were developed to allow quality industrial components for use in zone 2. That is where a hazardous area material is only present for short periods of time- typically because of a fault somewhere else in the plant area. This means that there is a wealth of solutions available to indEx customers for zone 2, 22 which are not only cost effective, time sensitive and weigh much less than conventional Ex d flameproof enclosures, they also look much better as well!

ZoneDefinition
GasDust
020>1000 hours per year
121Between 10 & 1000 hours per year
222<10 hours per year
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ATEX Zone 2, 22 Protection Types

Ex Marking Code Protection principle Definintion Application ATEX/CENELEC /IEC Possible use Equipment protection level (EPL)
  • Ex n/ N
Non incendive Not capable of causing ignition in normal operation
  • Zone 2, 22 or
    non hazardous area
  • Category 3 GD
  • 60079-15
  • EN 50021
Luminaries, low power equipment, rotating machines, fuses
  • Gc
  • Ex nR
Restricted Breathing Keep out hazardous material by means of adequate sealing (IP66)
  • Zone 2, 22 or
    non hazardous area
  • Category 3 GD
  • 60079-15
  • EN 50021
Arcing sparking and hot surfaces, inverters, control & inst components, actuators, relays, PLC's
  • Gc
  • Ex nA
Non Sparking Not capable of causing ignition in normal operation
  • Zone 2, 22 or
    non hazardous area
  • Category 3 GD
  • 60079-15
  • EN 50021
Fuses, Shunts, restistors, low power equipment, transformers, batteries
  • Gc
  • Ex nL
Energy Limited Power insufficient to cause ignition
  • Zone 2, 22 or
    non hazardous area
  • Category 3 GD
  • 60079-15
  • EN 50021
Lower power PCB, PLC’s
  • Gc
  • Ex nC
Enclosed break No transmisson to surroundings.
  • Zone 2, 22 or
    non hazardous area
  • Category 3 GD
  • 60079-15
  • EN 50021
Switch gear (closed), reduced spec Ex d, reduced encapsulation “m” for circuits
  • Gc
Non Incendive As above.
Hermetically sealed Primary sparking device is fusion sealed.
Simple encapsulation Potting compound used.
  • Ex pZ
Pressurised Keep out hazardous material by positive internal pressure and adequate sealing
  • Zone 2, 22
  • IEC 60079-15
Renders internal Ignition capable components (high grade industrial or Zone 2 ATEX EC type quality) suitable for non-hazardous area
  • Gc
  • Ex nZ
Simple Pressurisation As above
  • Zone 2, 22
  • IEC 60079-15
  • Gc

Ex nR- Restricted breathing

  • Control panel solutions
  • Arcing and sparking contactors
  • Inverters
  • PLC’s
  • Relays
  • HMI Screens
  • Industrial components

...and many more.

Ex nA- Non Sparking

  • Transformers
  • Batteries
  • Resistors
  • Shunts
  • Low power units
  • Digital displays

Ex pz, Pressurisation & Ex nZ, Simple Pressurisation

  • Allows industrial components to be used in a zone 2 area
  • Much larger cabinets possible
  • Alarm & repressurisation solutions available
  • Talk to indEx sales for px and py pressure systems solutions as well

Zone 22- Dust protection

  • Allows industrial components to be used in a zone 20, 21 & 22 area
  • Control panel solutions
  • IP66 allows jet sprays for fast cleaning
  • Electro polish finish for pharmaceutical, milling, etc industries
  • Sloping canopies, shades etc allowing dust “run off”

Self Certification

As the manufacturer we are more than happy to work in partnership with you. We can send a blank mounting plate with entries to suit within a few days. This will allow you to build up your component/ mounting board much faster.

indEx then send the enclosure (framework also available) for you to integrate.

We then test and certify!

Yes it is that easy…

atex enclosure
atex enclosure atex enclosure

We just need to know a few things first:-

  • Internal component sizes
  • Mounting plate size
  • Power dissipation of each component
  • Enclosure footprint size required (depth or overall size may need to change to avoid any heat build up)
  • Entry details

Let us know the footprint size you need, and we will optimise the best solution for your project.

Talk to our sales team for more details on the zone 2 protection concepts and start saving time money and effort now!

We can also arrange for one of our sales engineers to visit you to discuss your exact requirements. Details in contact us.

N.B. indEx can provide a design and build service for enclosures. They can then be tested by third party EN test houses such as SIRA for solutions such as high voltage, field bus systems, control panels at additional cost.

Above: Zone 2 Lighting control stations and distribution boards See Case Study

iecex-certified

Questions, enquiries?
Call us on +44 (0)1233 638311 or email sales@indexenclosures.com

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