Safety, Protection & Standards
Intrinsic safety (Ex i)
An explosion-protection method that limits electrical energy so sparks or heating cannot ignite the specified hazardous atmosphere under defined faults.
IN ONE SENTENCE
It allows suitably designed low-energy instrumentation circuits in hazardous areas.
In normal English
The complete loop-including field device, barrier/isolator, cable parameters and installation-must satisfy the intrinsic-safety requirements.
Why would I use it?
Use it for low-power instrumentation where Ex i system design is appropriate.
THINK OF IT LIKE…
Making the electrical circuit too low-energy to ignite the atmosphere.
Related terms
ATEX, barrier, NAMUR
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