![\"\"](\"https:\/\/led.amasly.com\/wp-content\/uploads\/2024\/12\/Explosion-proof-junction-box.jpg\" "\\"Nev\u00fdbu\u0161n\u00e1")
<\/figure><\/div>\n\n\n\nI. Struktur\u00e1ln\u00ed po\u017eadavky <\/p>\n\n\n\n
Na sty\u010dn\u00fdch ploch\u00e1ch lze k zaji\u0161t\u011bn\u00ed \u00fa\u010dinnosti t\u011bsn\u011bn\u00ed sk\u0159\u00edn\u011b pou\u017e\u00edt stla\u010den\u00e1 t\u011bsn\u011bn\u00ed. V\u0161echna t\u011bsn\u011bn\u00ed a ucp\u00e1vky by m\u011bly m\u00edt celistvou souvislou strukturu, tj. prstencov\u00e9 a nep\u0159eru\u0161ovan\u00e9. Konstrukce sk\u0159\u00edn\u011b by m\u011bla zajistit spr\u00e1vnou polohu t\u011bsn\u011bn\u00ed. <\/p>\n\n\n\n
Pokud stupe\u0148 ochrany sk\u0159\u00edn\u011b z\u00e1vis\u00ed na t\u011bsn\u011bn\u00ed ve spoji sk\u0159\u00edn\u011b a spoj je t\u0159eba p\u0159i instalaci nebo \u00fadr\u017eb\u011b otev\u0159\u00edt, m\u011blo by b\u00fdt t\u011bsn\u011bn\u00ed p\u0159ilepeno nebo mechanicky upevn\u011bno k jednomu ze sty\u010dn\u00fdch povrch\u016f, aby se zabr\u00e1nilo ztr\u00e1t\u011b, po\u0161kozen\u00ed nebo nespr\u00e1vn\u00e9 instalaci. Na sty\u010dn\u00fdch ploch\u00e1ch s pou\u017eit\u00edm t\u011bsn\u011bn\u00ed by se nem\u011bly pou\u017e\u00edvat dal\u0161\u00ed t\u011bsnic\u00ed materi\u00e1ly jako pomocn\u00fd prost\u0159edek pro zaji\u0161t\u011bn\u00ed t\u011bsnosti. <\/p>\n\n\n\n
Z\u00e1v\u011bsy by nem\u011bly b\u00fdt pou\u017e\u00edv\u00e1ny jako prost\u0159edek pro udr\u017een\u00ed t\u011bsn\u011bn\u00ed, s v\u00fdjimkou p\u0159\u00edpad\u016f, kdy lze t\u011bsn\u011bn\u00ed \u0159\u00e1dn\u011b stla\u010dit, ani\u017e by do\u0161lo k neo\u010dek\u00e1van\u00e9mu pohybu, nap\u011bt\u00ed nebo deformaci t\u011bsn\u011bn\u00ed. <\/p>\n\n\n\n
Pru\u017en\u00e1 t\u011bsn\u011bn\u00ed, jako jsou m\u011bchy, by nem\u011bla b\u00fdt v \u017e\u00e1dn\u00e9m bod\u011b vystavena nadm\u011brn\u00e9mu nam\u00e1h\u00e1n\u00ed. M\u011bla by b\u00fdt p\u0159ijata opat\u0159en\u00ed, kter\u00e1 zabr\u00e1n\u00ed vn\u011bj\u0161\u00edmu mechanick\u00e9mu po\u0161kozen\u00ed, a ka\u017ed\u00fd konec by m\u011bl b\u00fdt mechanicky upevn\u011bn. <\/p>\n\n\n\n
Pozn\u00e1mka: V\u00fd\u0161e uveden\u00e9 po\u017eadavky se nevztahuj\u00ed na t\u011bsn\u011bn\u00ed uvnit\u0159 kabelov\u00e9ho vstupn\u00edho za\u0159\u00edzen\u00ed. <\/p>\n\n\n\n
II. Po\u017eadavky na testov\u00e1n\u00ed <\/p>\n\n\n\n
Po proveden\u00ed zkou\u0161ek pl\u00e1\u0161t\u011b v souladu s p\u0159\u00edslu\u0161n\u00fdmi po\u017eadavky by m\u011bly b\u00fdt na v\u0161ech zku\u0161ebn\u00edch vzorc\u00edch provedeny tlakov\u00e9 zkou\u0161ky a n\u00e1sledn\u011b zkou\u0161ky stupn\u011b kryt\u00ed IP. <\/p>\n\n\n\n
Norma pro \u201cZa\u0159\u00edzen\u00ed chr\u00e1n\u011bn\u00e1 prachot\u011bsn\u00fdmi kryty \u2018t'\u201d v prost\u0159ed\u00ed s nebezpe\u010d\u00edm v\u00fdbuchu doplnila po\u017eadavek na tlakovou zkou\u0161ku pro posouzen\u00ed ochrann\u00e9ho \u00fa\u010dinku t\u011bsn\u011bn\u00ed a ucp\u00e1vek. Konkr\u00e9tn\u011b by m\u011bl vnit\u0159n\u00ed tlak \u010dinit nejm\u00e9n\u011b (4 \u00b1 0,4) kPa (pro stupe\u0148 ochrany \u2018ta\u2019) a (2 \u00b1 0,2) kPa (pro stupn\u011b ochrany \u2018tb\u2019 a \u2018tc\u2019) a m\u011bl by trvat 60 a\u017e 70 sekund. <\/p>\n\n\n\n
Zde je t\u0159eba poznamenat, \u017ee:<\/p>\n\n\n\n
(a) Za\u0159\u00edzen\u00ed pro zav\u00e1d\u011bn\u00ed kabel\u016f a dal\u0161\u00ed kryty za\u0159\u00edzen\u00ed Ex nemus\u00ed b\u00fdt podrobeny tlakov\u00fdm zkou\u0161k\u00e1m, s v\u00fdjimkou t\u011bsn\u011bn\u00ed, kter\u00e9 zaji\u0161\u0165uje ochranu povrchu instala\u010dn\u00ed sp\u00e1ry za\u0159\u00edzen\u00ed pro zav\u00e1d\u011bn\u00ed kabel\u016f a krytu; <\/p>\n\n\n\n
(b) Pokud konstrukce za\u0159\u00edzen\u00ed Ex m\u016f\u017ee omezit pohyb t\u011bsn\u011bn\u00ed a ucp\u00e1vek, jako jsou \u201cO\u201d krou\u017eky v dr\u00e1\u017ek\u00e1ch nebo t\u011bsn\u011bn\u00ed nalepen\u00e1 na jedn\u00e9 stran\u011b povrchu spoje, tlakov\u00e9 zkou\u0161ky se u za\u0159\u00edzen\u00ed Ex s \u00farovn\u00ed ochrany \u201ctb\u201d a \u201ctc\u201d nevy\u017eaduj\u00ed.<\/p>","protected":false},"excerpt":{"rendered":"
It is well known that the protective performance of the equipment enclosure protected by the dust-proof ignition-proof enclosure “t” is a key point that product design focuses on. Therefore, the structural rationality of the gaskets and seals that play a protective role is particularly important. I. Structural Requirements In the mating surfaces, compressed gaskets can […]<\/p>\n","protected":false},"author":1,"featured_media":1603,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[8],"tags":[],"class_list":["post-1602","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-explosion-proof-equipment"],"uagb_featured_image_src":{"full":["https:\/\/led.amasly.com\/wp-content\/uploads\/2024\/12\/Explosion-proof-junction-box.jpg",995,395,false],"thumbnail":["https:\/\/led.amasly.com\/wp-content\/uploads\/2024\/12\/Explosion-proof-junction-box-150x150.jpg",150,150,true],"medium":["https:\/\/led.amasly.com\/wp-content\/uploads\/2024\/12\/Explosion-proof-junction-box-300x119.jpg",300,119,true],"medium_large":["https:\/\/led.amasly.com\/wp-content\/uploads\/2024\/12\/Explosion-proof-junction-box-768x305.jpg",768,305,true],"large":["https:\/\/led.amasly.com\/wp-content\/uploads\/2024\/12\/Explosion-proof-junction-box.jpg",995,395,false],"1536x1536":["https:\/\/led.amasly.com\/wp-content\/uploads\/2024\/12\/Explosion-proof-junction-box.jpg",995,395,false],"2048x2048":["https:\/\/led.amasly.com\/wp-content\/uploads\/2024\/12\/Explosion-proof-junction-box.jpg",995,395,false],"trp-custom-language-flag":["https:\/\/led.amasly.com\/wp-content\/uploads\/2024\/12\/Explosion-proof-junction-box.jpg",18,7,false]},"uagb_author_info":{"display_name":"Joe","author_link":"https:\/\/led.amasly.com\/cs\/author\/jacklin\/"},"uagb_comment_info":0,"uagb_excerpt":"It is well known that the protective performance of the equipment enclosure protected by the dust-proof ignition-proof enclosure “t” is a key point that product design focuses on. Therefore, the structural rationality of the gaskets and seals that play a protective role is particularly important. I. Structural Requirements In the mating surfaces, compressed gaskets can…","_links":{"self":[{"href":"https:\/\/led.amasly.com\/cs\/wp-json\/wp\/v2\/posts\/1602","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/led.amasly.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/led.amasly.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/led.amasly.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/led.amasly.com\/cs\/wp-json\/wp\/v2\/comments?post=1602"}],"version-history":[{"count":1,"href":"https:\/\/led.amasly.com\/cs\/wp-json\/wp\/v2\/posts\/1602\/revisions"}],"predecessor-version":[{"id":1604,"href":"https:\/\/led.amasly.com\/cs\/wp-json\/wp\/v2\/posts\/1602\/revisions\/1604"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/led.amasly.com\/cs\/wp-json\/wp\/v2\/media\/1603"}],"wp:attachment":[{"href":"https:\/\/led.amasly.com\/cs\/wp-json\/wp\/v2\/media?parent=1602"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/led.amasly.com\/cs\/wp-json\/wp\/v2\/categories?post=1602"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/led.amasly.com\/cs\/wp-json\/wp\/v2\/tags?post=1602"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}