{"id":14010,"date":"2020-07-07T23:03:40","date_gmt":"2020-07-07T23:03:40","guid":{"rendered":"https:\/\/elexpert.ma\/index.php\/solutions\/protection-of-the-installations-against-overvoltages\/"},"modified":"2023-03-08T19:47:24","modified_gmt":"2023-03-08T19:47:24","slug":"protection-of-the-installations-against-overvoltages","status":"publish","type":"elexpert_solution","link":"https:\/\/elexpert.ma\/index.php\/solutions\/power-quality\/protection-of-the-installations-against-overvoltages\/?lang=en","title":{"rendered":"Protection of the installations against overvoltages"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><p>[vc_row cspt-text-color=&#8221;white&#8221; cspt-bg-image-position=&#8221;right-bottom&#8221; full_width=&#8221;stretch_row&#8221; css=&#8221;.vc_custom_1631310546842{padding-top: 0px !important;padding-bottom: 0px !important;background-image: url(https:\/\/elexpert.ma\/wp-content\/uploads\/2020\/07\/protection-contre-les-surtensions-2.jpg?id=12743) !important;background-position: center !important;background-repeat: no-repeat !important;background-size: contain !important;}&#8221;][vc_column width=&#8221;1\/2&#8243; css=&#8221;.vc_custom_1630251359886{padding-top: 20px !important;background-color: #ff9314 !important;}&#8221;][vc_raw_html]W2VsZXhwZXJ0X2JyZWFkY3J1bXBd[\/vc_raw_html][\/vc_column][vc_column width=&#8221;1\/2&#8243;][\/vc_column][\/vc_row][vc_row css=&#8221;.vc_custom_1591394160539{padding-top: 50px !important;padding-bottom: 50px !important;}&#8221;][vc_column width=&#8221;3\/4&#8243;][vc_column_text]<\/p>\n<p class=\"Normal tm5\" style=\"text-align: justify;\"><em><span class=\"tm6\">Overvoltages are the main cause of failure of electronic devices: Variable speed drives, inverters, stabilized power supplies, programmable logic controllers, supervision screens and human-machine interfaces, etc.  <\/span><\/em><\/p>\n<p class=\"Normal tm5\" style=\"text-align: justify;\"><em><span class=\"tm6\">Although less frequent than voltage dips and interruptions, their effects are much more damaging and destructive.<\/span><\/em><\/p>\n<p>Unfortunately, most building operators and maintenance managers in industry take a fatalistic approach to these phenomena, often blaming the reliability of electronic equipment as the cause of the failures.<\/p>\n<p>They do not realize that it is often easy to <strong>prevent<\/strong> these problems or to <strong>solve<\/strong> them <strong>permanently<\/strong>, by installing adapted solutions of protection against surges.<\/p>\n<p>&nbsp;[\/vc_column_text][vc_column_text]<em><span class=\"tm6\">Contrary to popular belief, 80% of transient power surges originate inside our installations, and do not always come from the outside network.<\/span><\/em><\/p>\n<p class=\"Normal tm5\" style=\"text-align: justify;\"><span class=\"tm6\">Power surges can be classified into three categories: transient power surges that typically last less than 1 millisecond (a few hundred microseconds), temporary power surges that last between 10 milliseconds and several seconds, and permanent power surges that can last from several minutes to several hours if not detected and corrected quickly.<\/span><\/p>\n<p class=\"Normal tm5\" style=\"text-align: justify;\"><em><span class=\"tm7\">Main causes of power surges:<\/span><\/em><\/p>\n<p>[\/vc_column_text][vc_row_inner][vc_column_inner width=&#8221;1\/3&#8243;][vc_column_text]<\/p>\n<p class=\"Normal tm6\" style=\"text-align: center;\"><strong><span class=\"tm7\">Transient overvoltages<\/span><\/strong><\/p>\n<ul>\n<li class=\"ListParagraph tm8\"><span class=\"tm11\">Lightning strikes on or near the structure<\/span><\/li>\n<li class=\"ListParagraph tm8\"><span class=\"tm11\">Switching of switches and contactors<\/span><\/li>\n<li class=\"ListParagraph tm8\"><span class=\"tm11\">Capacitor switching,  <\/span><\/li>\n<li class=\"ListParagraph tm8\"><span class=\"tm11\">Current chopping, for example,  <\/span><\/li>\n<li class=\"ListParagraph tm8\"><span class=\"tm11\">The restoration of current in a line (ferranti effect),<\/span><\/li>\n<li class=\"ListParagraph tm8\"><span class=\"tm11\">Switching of power electronic components<\/span><\/li>\n<li class=\"ListParagraph tm8\"><span class=\"tm11\">Electrostatic discharges<\/span><\/li>\n<li class=\"ListParagraph tm8\"><span class=\"tm11\">&#8230;..<\/span><\/li>\n<\/ul>\n<p>[\/vc_column_text][\/vc_column_inner][vc_column_inner width=&#8221;1\/3&#8243;][vc_column_text]<\/p>\n<p class=\"Normal tm6\" style=\"text-align: center;\"><strong><span class=\"tm7\">Temporary power surges<\/span><\/strong><\/p>\n<ul>\n<li class=\"ListParagraph tm8\"><span class=\"tm11\">single fault between a phase and the ground,  <\/span><\/li>\n<li class=\"ListParagraph tm8\"><span class=\"tm11\">sudden load drops (v = L di \/ dt)  <\/span><\/li>\n<li class=\"ListParagraph tm8\"><span class=\"tm11\">sudden power interruption  <\/span><\/li>\n<li class=\"ListParagraph tm8\"><span class=\"tm11\">powering up a large capacitor bank <\/span><span class=\"tm11\">&#8230;.<\/span><\/li>\n<\/ul>\n<p class=\"ListParagraph\"><span class=\"tm9\"> <\/span><\/p>\n<p>[\/vc_column_text][\/vc_column_inner][vc_column_inner width=&#8221;1\/3&#8243;][vc_column_text]<\/p>\n<p class=\"Normal tm6\" style=\"text-align: center;\"><strong><span class=\"tm7\">Long-term power surges<\/span><\/strong><\/p>\n<ul>\n<li class=\"ListParagraph tm8\"><span class=\"tm11\">poor sizing of the power cables,  <\/span><\/li>\n<li class=\"ListParagraph tm8\"><span class=\"tm11\">loads in the lines, lower than expected,  <\/span><\/li>\n<li class=\"ListParagraph tm8\"><span class=\"tm11\">malfunctioning of the on-load regulators of the source substation transformers  <\/span><\/li>\n<li class=\"ListParagraph tm8\"><span class=\"tm11\">&#8230;.<\/span><\/li>\n<\/ul>\n<p>[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][\/vc_column][vc_column width=&#8221;1\/4&#8243;][vc_cta h2=&#8221;Download the brochure&#8221; txt_align=&#8221;center&#8221; add_button=&#8221;bottom&#8221; btn_title=&#8221;Download&#8221; btn_align=&#8221;center&#8221; add_icon=&#8221;top&#8221; i_icon_fontawesome=&#8221;fas fa-cloud-download-alt&#8221; btn_link=&#8221;url:http%3A%2F%2Felexpert.ma%2Fwp-content%2Fuploads%2F2021%2F07%2FP26.pdf|title:Solutions|target:%20_blank|&#8221;][\/vc_cta][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]<\/p>\n<p class=\"Normal tm5\" style=\"text-align: justify;\"><span class=\"tm7\">Whatever the cause of power surges, their effects can be devastating and involve very heavy financial losses for users. The first equipment to be destroyed by power surges are electronic ballasts, variable frequency drives, inverters, and other power electronic equipment.<\/span><\/p>\n<p class=\"Normal tm5\" style=\"text-align: justify;\"><span class=\"tm6\">A power surge can also disrupt electronic controls, such as electronic speed controllers, which can trip due to their internal protection circuits. Some power surges can also degrade insulation materials and thus shorten the life of electrical equipment.<\/span><\/p>\n<p>[\/vc_column_text][\/vc_column][\/vc_row][vc_row cspt-text-color=&#8221;white&#8221; cspt-bg-color=&#8221;globalcolor&#8221; cspt-extended-column=&#8221;last&#8221; full_width=&#8221;stretch_row&#8221; equal_height=&#8221;yes&#8221; content_placement=&#8221;middle&#8221; css=&#8221;.vc_custom_1631311343011{padding-top: 50px !important;padding-bottom: 50px !important;}&#8221;][vc_column width=&#8221;1\/2&#8243;][vc_column_text]Surge protection solutions are as varied as surges themselves. Here is a non-exhaustive list:<\/p>\n<ul>\n<li>Surge protectors and lightning arresters (LV and HV)<\/li>\n<li>Line inductances<\/li>\n<li>Shunt capacitors<\/li>\n<li>Automatic compensation batteries<\/li>\n<li>Electronic VAR generators (SVG)<\/li>\n<li>Tension stabilizers<\/li>\n<li>Uninterruptible power supplies on-line with double conversion<\/li>\n<li>Overvoltage relay (prevention)<\/li>\n<li>Etc.<\/li>\n<\/ul>\n<p>The solutions are chosen according to the type of phenomenon detected (transient, temporary or permanent overvoltage), its origin but also according to the cost of the solution.[\/vc_column_text][\/vc_column][vc_column width=&#8221;1\/2&#8243;][vc_raw_html]PHZpZGVvIGF1dG9wbGF5PSIiIGxvb3A9IiIgbXV0ZWQ9IiIgY29udHJvbHM9IiIgd2lkdGg9IjEwMCUiPgogICAgPHNvdXJjZSBzcmM9Imh0dHBzOi8vZWxleHBlcnQubWEvd3AtY29udGVudC92aWRlb3MvcHJvdGVjdGlvbi1zdXJ0ZW5zaW9ucy53ZWJtIiB0eXBlPSJ2aWRlby93ZWJtIj4KICBTb3JyeSwgeW91ciBicm93c2VyIGRvZXNuJ3Qgc3VwcG9ydCBlbWJlZGRlZCB2aWRlb3MuCjwvc291cmNlPjwvdmlkZW8+[\/vc_raw_html][\/vc_column][\/vc_row][vc_row full_width=&#8221;stretch_row&#8221; css=&#8221;.vc_custom_1591394175233{padding-top: 50px !important;padding-bottom: 50px !important;}&#8221;][vc_column][vc_column_text]Conducting a detailed network analysis, which includes an evaluation of the voltage quality at critical points of your installation, combined with a thorough analysis of your installation and its environment is a prerequisite for determining the best solution to effectively address this type of phenomenon.<\/p>\n<p>The solutions we deploy can be as rich and varied as the surge phenomena.<\/p>\n<p>Some are &#8220;corrective&#8221; solutions that are installed after the damage to the installation has been discovered, and allow for the correction of a problem that caused the surge. Others, are rather preventive, and allow to prevent the danger and to protect the installation even before the phenomenon occurs.<\/p>\n<p>Moreover, it is often wise to combine several solutions at the same time, in order to eliminate or at least reduce the risks related to power surges.<\/p>\n<p><strong>We assets:<\/strong><\/p>\n<ul>\n<li class=\"ListParagraph tm6\"><span class=\"tm7\">A proven expertise in the field and a know-how recognized on the market<\/span><\/li>\n<li class=\"ListParagraph tm6\"><span class=\"tm7\">The guarantee of a QUALIFOUDRE certified provider<\/span><\/li>\n<li class=\"ListParagraph tm6\"><span class=\"tm7\">More than 100 missions carried out for over 13 years with great success<\/span><\/li>\n<li class=\"ListParagraph tm6\"><span class=\"tm7\">State-of-the-art measuring equipment (class A) and in large numbers: Circutor, A-Eberle, Fluke<\/span><\/li>\n<li class=\"ListParagraph tm6\"><span class=\"tm7\">Strong partnerships with the world&#8217;s leading manufacturers of surge protection solutions<\/span><\/li>\n<li class=\"ListParagraph tm6\"><span class=\"tm7\">Remote monitoring and power monitoring services<\/span><\/li>\n<li class=\"ListParagraph tm6\"><span class=\"tm7\">Guarantee on the result &#8211; double guarantee on the material<\/span><\/li>\n<\/ul>\n<p>[\/vc_column_text][\/vc_column][\/vc_row][vc_row disable_element=&#8221;yes&#8221;][vc_column]<div  class=\"creativesplanet-element creativesplanet-element-portfolio cspt-element-portfolio-style-2 creativesplanet-element-viewtype-row-column cspt-sortable-no\" data-show=\"3\" data-columns=\"3\" data-loop=\"false\" data-autoplay=\"false\" data-center=\"false\" data-nav=\"false\" data-dots=\"false\" data-autoplayspeed=\"1000\" data-margin=\"\"><div class=\"creativesplanet-element-inner\"><div class=\"cspt-ele-header-area\"><\/div><div class=\"cspt-element-posts-wrapper row multi-columns-row\"><div class=\"cspt-ele cspt-portfolio-ele col-md-4 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class=\"vc_general vc_btn3 vc_btn3-size-md vc_btn3-shape-rounded vc_btn3-style-modern vc_btn3-color-globalcolor\" href=\"https:\/\/elexpert.ma\/index.php\/portfolio\/consectetur-adipiscing\/\" title=\"Consectetur adipiscing\"><span>Read More<\/span><\/a>\r\n\t\t\t<\/div>\r\n\t\t<\/div>\r\n\t<\/div>\r\n<\/article><\/div><\/div><\/div><!-- .creativesplanet-element-inner -->   <\/div><!-- .creativesplanet-element -->  [\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"parent":14037,"menu_order":0,"template":"","class_list":["post-14010","elexpert_solution","type-elexpert_solution","status-publish","hentry","elxpert_section-qualite-de-lenergie"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.8.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Protection of the installations against overvoltages - Elexpert<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/elexpert.ma\/index.php\/solutions\/power-quality\/protection-of-the-installations-against-overvoltages\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Protection of the installations against overvoltages - Elexpert\" \/>\n<meta property=\"og:description\" content=\"[vc_row cspt-text-color=&#8221;white&#8221; cspt-bg-image-position=&#8221;right-bottom&#8221; full_width=&#8221;stretch_row&#8221; css=&#8221;.vc_custom_1631310546842{padding-top: 0px !important;padding-bottom: 0px !important;background-image: url(https:\/\/elexpert.ma\/wp-content\/uploads\/2020\/07\/protection-contre-les-surtensions-2.jpg?id=12743) !important;background-position: center !important;background-repeat: no-repeat !important;background-size: contain !important;}&#8221;][vc_column width=&#8221;1\/2&#8243; css=&#8221;.vc_custom_1630251359886{padding-top: 20px !important;background-color: #ff9314 !important;}&#8221;][vc_raw_html]W2VsZXhwZXJ0X2JyZWFkY3J1bXBd[\/vc_raw_html][\/vc_column][vc_column width=&#8221;1\/2&#8243;][\/vc_column][\/vc_row][vc_row css=&#8221;.vc_custom_1591394160539{padding-top: 50px !important;padding-bottom: 50px !important;}&#8221;][vc_column width=&#8221;3\/4&#8243;][vc_column_text] Overvoltages are the main cause of failure of electronic devices: Variable speed drives, inverters, stabilized power supplies, programmable logic controllers, supervision screens and human-machine interfaces, etc. Although less frequent than voltage dips and interruptions, their effects are much more damaging[&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/elexpert.ma\/index.php\/solutions\/power-quality\/protection-of-the-installations-against-overvoltages\/?lang=en\" \/>\n<meta property=\"og:site_name\" content=\"Elexpert\" \/>\n<meta property=\"article:modified_time\" content=\"2023-03-08T19:47:24+00:00\" \/>\n<meta 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