Which is better intrinsic safety or explosion-proof?
Both intrinsic safety (Ex i) and explosion-proof (Ex d) are viable solutions for Zone 2 hazardous areas, but their selection depends on power requirements, installation constraints, and maintenance considerations. While Ex i is better for low-power, easily maintainable systems, Ex d is necessary for high-power, durable applications.
How strong is an explosion enclosure?
The enclosure of the equipment is so strong it can withstand the pressure of an internal explosion without damage. In addition, it has been constructed so that hot gases and particles emitted by an explosion are cooled to such an extent they can no longer ignite an explosive mixture present on the outside.
How do I choose between intrinsic safety and explosion-proof (ex D)?
When selecting between intrinsic safety (Ex i) and explosion-proof (Ex d) for Zone 2 applications, consider the following factors: For measurement and control instruments (e.g., pressure, temperature, and flow sensors) → Intrinsic Safety (Ex i) is preferable due to ease of maintenance and lower cost.
Why do installers choose explosion-proof (flameproof) protection methods?
Some installers dislike the complexity of the design of IS Systems and choose other protection methods such as explosion-proof (flameproof). The explosion-proof protection method relies on equipment and wiring enclosures to prevent an internal ignition from escaping to the surrounding atmosphere.
What is explosion-proof or flameproof (ex D) protection?
Explosion-proof or flameproof (Ex d) protection relies on enclosing electrical components within a robust, flame-resistant enclosure. In case of an internal explosion, the enclosure prevents flames or hot gases from igniting the surrounding hazardous atmosphere. The enclosure must be strong enough to contain an explosion.
Why are explosion-proof systems more expensive?
While an explosion-proof system is generally considered somewhat simpler to design, it is generally more expensive to install because of the high cost of running field wiring inside a conduit, which must be sealed between the safe and hazardous areas.
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