{"id":4168,"date":"2026-05-30T16:54:24","date_gmt":"2026-05-30T13:54:24","guid":{"rendered":"https:\/\/aesinn.com\/?p=4168"},"modified":"2026-05-30T23:19:44","modified_gmt":"2026-05-30T20:19:44","slug":"iec-60079-11-kendinden-emniyetli-ex-i","status":"publish","type":"post","link":"https:\/\/aesinn.com\/en\/iec-60079-11-kendinden-emniyetli-ex-i\/","title":{"rendered":"What is IEC 60079-11? Intrinsically Safe (Ex i) Protection Type."},"content":{"rendered":"

Short answer:<\/strong> IEC 60079-11, Self-Confident (Ex i)<\/strong> It defines the type of protection. The electrical energy (current, voltage, capacitance, inductance) going to the site is kept low enough to prevent it from igniting the explosive atmosphere. Thus, even if a spark occurs, its energy remains below the ignition threshold.<\/p><\/blockquote>\n\n\n\n

Among explosive atmosphere protection methods, Intrinsic Safety (Ex-i) is perhaps the most intelligent. While other methods attempt to isolate or contain the spark, Ex-i solves the problem at its source: if the energy in the circuit is insufficient for ignition, then the occurrence of a spark does not pose a danger. This philosophy is particularly important. sensors, transmitters and valve positioners<\/strong> It is ideal for low-power field equipment such as these. Moreover, Ex-i has a unique advantage: intervention and maintenance can be carried out safely even when the circuit is energized; this is a great convenience in facilities with continuous production.<\/p>\n\n\n\n

Levels of Ex-i: ia, ib, ic<\/h2>\n\n\n\n
Level<\/th>Security level<\/th>Area of use<\/th><\/tr><\/thead>
ia<\/td>Safe even in the event of two independent failures.<\/td>Zone 0 (most dangerous)<\/td><\/tr>
ib<\/td>Safe in the event of a single malfunction.<\/td>Zone 1<\/td><\/tr>
drink<\/td>Safe in normal operation.<\/td>Zone 2<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

This tiered structure allows the protection level to be selected according to the degree of danger in the environment. Zone 0, with its continuously explosive atmosphere, requires the highest level of protection, 'ia', while Zone 2, where danger only arises in abnormal situations, may only require 'ic'.<\/p>\n\n\n\n

Basic Principle: Energy Limitation and Barriers<\/h2>\n\n\n\n

At the heart of the Ex-i design energy restriction<\/strong> There is a capacitance and inductance in the circuit that are calculated in such a way that even if the stored energy is released in the event of a fault, it cannot ignite the environment. To ensure this limit, a safe zone is established between the area and the field. Zener barriers or galvanic insulators<\/strong> They are installed; these cut off current and voltage peaks before they reach the field. The critical point is this: Ex-i safety is not found in a single device, field equipment + barrier + cabling as a complete package<\/strong> This is ensured. The compatibility of this whole is verified by an 'entity' (compatibility) calculation performed with the parameters provided by the manufacturers.<\/p>\n\n\n\n

Most Common Field Error: System Incompatibility.<\/h2>\n\n\n\n

The most common nonconformity in Ex-i circuits is the haphazard combination of devices labeled 'Ex-i'. An incompatible field device-barrier pairing or exceeding the permitted cable capacitance\/inductance limits silently invalidates the protection level. Even if every component appears correct in the field, the system as a whole may not be safe. Therefore, Ex-i circuits should be inspected not only by labeling but also by circuit compatibility calculations. AES's inspection includes this compatibility verification.<\/p>\n\n\n\n

Frequently Asked Questions<\/h2>\n\n\n\n

What is the main advantage of Ex-i?<\/h3>\n\n\n\n

Thanks to low energy consumption, it can be activated. energetic intervention<\/strong> It is possible and can be used in the most dangerous areas such as Zone 0 (with 'ia').<\/p>\n\n\n\n

Can every device be made Ex-i?<\/h3>\n\n\n\n

No. Ex-i is only suitable for low-power circuits (sensors, transmitters, positioners); it is not suitable for high-power loads such as motors.<\/p>\n\n\n\n

Verify the compatibility of your Ex-i circuits.<\/h2>\n\n\n\n

Related service: Explosive Atmosphere (ATEX\/Ex-Proof) Inspections<\/a>.<\/p>\n\n\n\n

Get a free preliminary assessment and quote \u00bb<\/a><\/div><\/div>","protected":false},"excerpt":{"rendered":"

Short answer: IEC 60079-11 defines the intrinsically safe (Ex i) protection type. The electrical energy (current, voltage, capacitance, inductance) going to the site is explosive\u2026<\/p>","protected":false},"author":4,"featured_media":4167,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","slim_seo":{"title":"IEC 60079-11 Nedir? Kendinden Emniyetli (Ex i) Koruma Tipi - AES Innovation","description":"K\u0131sa yan\u0131t: IEC 60079-11, Kendinden Emniyetli (Ex i) koruma tipini tan\u0131mlar. Sahaya giden elektriksel enerji (ak\u0131m, gerilim, kapasitans, end\u00fcktans) patlay\u0131c\u0131 or"},"footnotes":""},"categories":[15],"tags":[],"class_list":["post-4168","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-standartlar"],"acf":[],"taxonomy_info":{"category":[{"value":15,"label":"Standartlar"}]},"featured_image_src_large":["https:\/\/aesinn.com\/wp-content\/uploads\/gorsel_60079_1_alevsizdirmaz_1776247369693-2.jpg",1024,1024,false],"author_info":{"display_name":"AI AI","author_link":"https:\/\/aesinn.com\/en\/author\/antigravity\/"},"comment_info":"","category_info":[{"term_id":15,"name":"Standartlar","slug":"standartlar","term_group":0,"term_taxonomy_id":15,"taxonomy":"category","description":"","parent":0,"count":32,"filter":"raw","cat_ID":15,"category_count":32,"category_description":"","cat_name":"Standartlar","category_nicename":"standartlar","category_parent":0}],"tag_info":false,"_links":{"self":[{"href":"https:\/\/aesinn.com\/en\/wp-json\/wp\/v2\/posts\/4168","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aesinn.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aesinn.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aesinn.com\/en\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/aesinn.com\/en\/wp-json\/wp\/v2\/comments?post=4168"}],"version-history":[{"count":2,"href":"https:\/\/aesinn.com\/en\/wp-json\/wp\/v2\/posts\/4168\/revisions"}],"predecessor-version":[{"id":4607,"href":"https:\/\/aesinn.com\/en\/wp-json\/wp\/v2\/posts\/4168\/revisions\/4607"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/aesinn.com\/en\/wp-json\/wp\/v2\/media\/4167"}],"wp:attachment":[{"href":"https:\/\/aesinn.com\/en\/wp-json\/wp\/v2\/media?parent=4168"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aesinn.com\/en\/wp-json\/wp\/v2\/categories?post=4168"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aesinn.com\/en\/wp-json\/wp\/v2\/tags?post=4168"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}