{"id":6030,"date":"2023-11-03T17:47:09","date_gmt":"2023-11-03T16:47:09","guid":{"rendered":"https:\/\/beshielding.com\/shielding\/special-applications\/struttura-schermante-autoportante\/"},"modified":"2024-02-16T12:49:23","modified_gmt":"2024-02-16T11:49:23","slug":"self-supporting-shielding-structure","status":"publish","type":"page","link":"https:\/\/beshielding.com\/en\/shielding\/special-applications\/self-supporting-shielding-structure\/","title":{"rendered":"Self-supporting Shielding Structure"},"content":{"rendered":"<section class=\"wpb-content-wrapper\"><p>[vc_row][vc_column width=&#8221;1\/2&#8243;]<style>.gem-infotext.thegem-custom-6ac718456ab047412 .gem-infotext-icon {margin-top:-2px !important;}.gem-infotext.thegem-custom-6ac718456ab047412 .gem-infotext-icon {margin-right:8px !important;}<\/style><div class=\"gem-infotext vc_custom_1708081634450 alignment-left thegem-custom-6ac718456ab047412\"> <div class=\"gem-infotext-wrap position--left vertical--top\"> <div class=\"gem-infotext-icon\"> <div class=\"gem-icon gem-simple-icon gem-icon-pack-elegant gem-icon-size-small\"> <div class=\"gem-icon-inner\"><span class=\"gem-icon-half-1\"><span class=\"back-angle\">&#x35;<\/span><\/span><span class=\"gem-icon-half-2\"><span class=\"back-angle\">&#x35;<\/span><\/span><\/div> <\/div> <\/div> <div class=\"gem-infotext\"> <div class=\"gem-infotext__title\"> <div class=\"title-customize title-default\" style=\"\"> SHIELDING OF DRY-TYPE TRANSFORMERS IS OFTEN MADE DIFFICULT BY THE INTENSE MAGNETIC FIELDS THEY PRODUCE. A SHIELDING SYSTEM MUST FEATURE A HIGH SHIELDING FACTOR AND THIS CAN ONLY BE ACHIEVED THROUGH THE COMBINED USE OF MAGNETIC AND CONDUCTIVE MATERIALS. STARTING WITH THE STANDARD PRODUCT, BESHIELDING S.R.L. HAS DEVELOPED AN INNOVATIVE, LOCALISED TRANSFORMER SHIELDING CONSISTING OF A SELF-SUPPORTING PARTITION, TO BE INSTALLED NEAR THE TRANSFORMER. <\/div> <\/div> <\/div> <\/div> <\/div>[\/vc_column][vc_column width=&#8221;1\/2&#8243;][vc_single_image image=&#8221;4192&#8243; img_size=&#8221;full&#8221;][\/vc_column][\/vc_row][vc_row][vc_column][vc_custom_heading text=&#8221;DESCRIPTION OF SHIELDING MATERIALS AND SHIELDING EFFICIENCY&#8221; font_container=&#8221;tag:h3|text_align:left&#8221; use_theme_fonts=&#8221;yes&#8221;][\/vc_column][\/vc_row][vc_row][vc_column width=&#8221;1\/2&#8243;][vc_column_text]Magnetic induction mitigation is achieved by applying magnetic shielding produced by coupling two different materials:<\/p>\n<ul>\n<li>A material with high electrical conductivity<\/li>\n<li>A material with high magnetic permeability<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>In the presence of a variable magnetic field (inductor field), the layer of material with high electrical conductivity becomes the site for circulating currents and these, in turn, generate a reaction magnetic field (inductive field). The combined effect of the fields \u2014 inductive and inductor \u2014 produces an overall reduction in the total magnetic field.<\/p>\n<p>The layer of material with high magnetic permeability makes it possible to reduce magnetic induction by absorbing the magnetic field present. Its shielding behaviour \u2014 which like an \u201cumbrella\u201d protects against the magnetic field \u2014 can be very intense close to the shield but tends to wane the further away from the shield one gets.<\/p>\n<p>The combination of the two materials \u2014 ferromagnetic and conductive \u2014 produces a shield with excellent shielding properties both when close to the shield, thanks mainly to the ferromagnetic component, as well as at a distance from the screen, thanks to the conductive component.<\/p>\n<p>Shielding efficiencies are defined by measuring the shielding factor (SF) performed at the BEShielding S.r.l. research and development laboratory in via Ferrero 10, Rivoli (TO), Italy.<\/p>\n<p>The tests were carried out by measuring the magnetic induction values emitted by a 630 kVA resin transformer before and after the field mitigation intervention.<\/p>\n<p>The shield dimensions are adapted to the size and consequently the dimensions of the transformer installed.<\/p>\n<p>The dimensions of the partition subjected to the experimental tests are given as an example.<\/p>\n<p>The shielding factor proposed below is calculated as the ratio of the magnetic induction modules pre- and post-shielding as a function of distance from the shield.<\/p>\n<p>It represents a simple, immediate indication of how many-fold the magnetic induction value can be reduced by application of the shielding solution.[\/vc_column_text][\/vc_column][vc_column width=&#8221;1\/2&#8243;][vc_single_image image=&#8221;4197&#8243; img_size=&#8221;full&#8221;][vc_column_text el_class=&#8221;small&#8221; css=&#8221;.vc_custom_1708081693376{padding-top: 10px !important;padding-right: 10px !important;padding-bottom: 10px !important;padding-left: 10px !important;background-color: #f4f4f4 !important;}&#8221;]Fig. 20 &#8211; Effect of shielding displaying the magnetic induction levels in the area to be protected[\/vc_column_text][vc_single_image image=&#8221;4198&#8243; img_size=&#8221;full&#8221;][vc_column_text el_class=&#8221;small&#8221; css=&#8221;.vc_custom_1708081712172{padding-top: 10px !important;padding-right: 10px !important;padding-bottom: 10px !important;padding-left: 10px !important;background-color: #f4f4f4 !important;}&#8221;]Fig. 21 &#8211; Test layout for determining the shielding factor[\/vc_column_text][vc_column_text el_class=&#8221;small&#8221; css=&#8221;.vc_custom_1708081723780{padding-top: 10px !important;padding-right: 10px !important;padding-bottom: 10px !important;padding-left: 10px !important;background-color: #f4f4f4 !important;}&#8221;]Fig. 22 &#8211; Shielding solution dimensions[\/vc_column_text][vc_single_image image=&#8221;4199&#8243; img_size=&#8221;full&#8221;][vc_column_text el_class=&#8221;small&#8221; css=&#8221;.vc_custom_1708081737823{padding-top: 10px !important;padding-right: 10px !important;padding-bottom: 10px !important;padding-left: 10px !important;background-color: #f4f4f4 !important;}&#8221;]Fig. 23 &#8211; Development of the shielding factor as a function of the distance from the shield at a height of 1 m above ground.[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n<\/section>","protected":false},"excerpt":{"rendered":"<p>[vc_row][vc_column width=&#8221;1\/2&#8243;][\/vc_column][vc_column width=&#8221;1\/2&#8243;][vc_single_image image=&#8221;4192&#8243; img_size=&#8221;full&#8221;][\/vc_column][\/vc_row][vc_row][vc_column][vc_custom_heading text=&#8221;DESCRIPTION OF SHIELDING MATERIALS AND SHIELDING EFFICIENCY&#8221; font_container=&#8221;tag:h3|text_align:left&#8221; use_theme_fonts=&#8221;yes&#8221;][\/vc_column][\/vc_row][vc_row][vc_column width=&#8221;1\/2&#8243;][vc_column_text]Magnetic induction mitigation is achieved by&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":6024,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"_links":{"self":[{"href":"https:\/\/beshielding.com\/en\/wp-json\/wp\/v2\/pages\/6030"}],"collection":[{"href":"https:\/\/beshielding.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/beshielding.com\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/beshielding.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/beshielding.com\/en\/wp-json\/wp\/v2\/comments?post=6030"}],"version-history":[{"count":4,"href":"https:\/\/beshielding.com\/en\/wp-json\/wp\/v2\/pages\/6030\/revisions"}],"predecessor-version":[{"id":6034,"href":"https:\/\/beshielding.com\/en\/wp-json\/wp\/v2\/pages\/6030\/revisions\/6034"}],"up":[{"embeddable":true,"href":"https:\/\/beshielding.com\/en\/wp-json\/wp\/v2\/pages\/6024"}],"wp:attachment":[{"href":"https:\/\/beshielding.com\/en\/wp-json\/wp\/v2\/media?parent=6030"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}