{"id":453,"date":"2018-11-23T10:04:03","date_gmt":"2018-11-23T09:04:03","guid":{"rendered":"http:\/\/mon-hub.com\/?p=453"},"modified":"2018-11-23T10:04:03","modified_gmt":"2018-11-23T09:04:03","slug":"demarrage-etoile-triangle-dun-compresseur-air-comprime","status":"publish","type":"post","link":"https:\/\/mon-hub.com\/index.php\/2018\/11\/23\/demarrage-etoile-triangle-dun-compresseur-air-comprime\/","title":{"rendered":"D\u00e9marrage \u00e9toile \/ triangle d&rsquo;un compresseur air comprim\u00e9"},"content":{"rendered":"<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-454 aligncenter\" src=\"http:\/\/mon-hub.com\/wp-content\/uploads\/2018\/11\/demarrage-etoile-triangle-compresseur-air-comprime-300x172.jpg\" alt=\"\" width=\"300\" height=\"172\" srcset=\"https:\/\/mon-hub.com\/wp-content\/uploads\/2018\/11\/demarrage-etoile-triangle-compresseur-air-comprime-300x172.jpg 300w, https:\/\/mon-hub.com\/wp-content\/uploads\/2018\/11\/demarrage-etoile-triangle-compresseur-air-comprime.jpg 525w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<p><strong>Application :\u00a0<\/strong><\/p>\n<p>L\u2019 appel de courant lors du d\u00e9marrage d\u2019un moteur peut provoquer des chutes de tension se traduisant par,\u00a0le vacillement de l\u2019\u00e9clairage d\u2019un local ou encore le d\u00e9clenchement des s\u00e9curit\u00e9s \u00e9lectriques. Afin de limiter\u00a0cet appel de courant important, on r\u00e9alise un d\u00e9marrage \u00e9toile \/ triangle. La commutation entre le couplage\u00a0\u00e9toile et triangle s\u2019effectue automatique \u00e0 l\u2019aide d\u2019une temporisation.<\/p>\n<p><strong>PRINCIPE DE FONCTIONNEMENT (simplifi\u00e9) :\u00a0<\/strong><\/p>\n<p>L\u2019obtention d\u2019un d\u00e9marrage \u00e9toile triangle passe par l&rsquo;alimentation en \u00e9toile d\u2019un moteur triphas\u00e9 pr\u00e9vu pour \u00eatre aliment\u00e9 normalement en triangle. Chacune des bobines \u00e9l\u00e9mentaires du moteur se trouve alors\u00a0aliment\u00e9e sous tension r\u00e9duite. <em><strong>L\u2019appel de courant au d\u00e9marrage est donc lui aussi r\u00e9duit dans les m\u00eame\u00a0proportions<\/strong><\/em><strong>.<\/strong><strong>Apr\u00e8s avoir atteint une certaine vitesse, ou apr\u00e8s qu\u2019un certain temps se soit \u00e9coul\u00e9, le moteur\u00a0est coupl\u00e9 en triangle. Il est maintenant aliment\u00e9 sous sa tension nominale et fournit donc son couple\u00a0nominal.<\/strong><br \/>\nPour \u00e9viter le couplage simultan\u00e9 \u00e9toile \/ triangle, ayant pour cons\u00e9quence un court-circuit, nous placerons\u00a0un verrouillage m\u00e9canique entre les contacteurs et aussi un verrouillage \u00e9lectrique dans le circuit de\u00a0commande.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-455 aligncenter\" src=\"http:\/\/mon-hub.com\/wp-content\/uploads\/2018\/11\/demarrage-etoile-triangle-compresseur-air-comprime-2-300x254.jpg\" alt=\"\" width=\"300\" height=\"254\" srcset=\"https:\/\/mon-hub.com\/wp-content\/uploads\/2018\/11\/demarrage-etoile-triangle-compresseur-air-comprime-2-300x254.jpg 300w, https:\/\/mon-hub.com\/wp-content\/uploads\/2018\/11\/demarrage-etoile-triangle-compresseur-air-comprime-2.jpg 435w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; Application :\u00a0 L\u2019 appel de courant lors du d\u00e9marrage d\u2019un moteur peut provoquer des chutes de tension se traduisant par,\u00a0le vacillement de l\u2019\u00e9clairage d\u2019un local ou encore le d\u00e9clenchement des s\u00e9curit\u00e9s \u00e9lectriques. Afin de limiter\u00a0cet appel de courant important, on r\u00e9alise un d\u00e9marrage \u00e9toile \/ triangle. La commutation entre le couplage\u00a0\u00e9toile et triangle s\u2019effectue [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,5],"tags":[],"_links":{"self":[{"href":"https:\/\/mon-hub.com\/index.php\/wp-json\/wp\/v2\/posts\/453"}],"collection":[{"href":"https:\/\/mon-hub.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mon-hub.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mon-hub.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mon-hub.com\/index.php\/wp-json\/wp\/v2\/comments?post=453"}],"version-history":[{"count":1,"href":"https:\/\/mon-hub.com\/index.php\/wp-json\/wp\/v2\/posts\/453\/revisions"}],"predecessor-version":[{"id":456,"href":"https:\/\/mon-hub.com\/index.php\/wp-json\/wp\/v2\/posts\/453\/revisions\/456"}],"wp:attachment":[{"href":"https:\/\/mon-hub.com\/index.php\/wp-json\/wp\/v2\/media?parent=453"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mon-hub.com\/index.php\/wp-json\/wp\/v2\/categories?post=453"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mon-hub.com\/index.php\/wp-json\/wp\/v2\/tags?post=453"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}