{"id":44,"count":1,"description":"Distribution surge arrester is a protective device used in medium-voltage power distribution systems to protect electrical equipment against lightning and switching overvoltages. It is commonly installed on overhead distribution lines, distribution transformers, substations, and other electrical installations.\r\n\r\nMost modern distribution surge arresters use zinc oxide (ZnO) varistor blocks as their main protective components. They are typically designed with silicone rubber polymer housings, offering good resistance to pollution, moisture, and outdoor weather conditions. Their lightweight construction also makes transportation and installation easier.\r\n\r\n<img class=\"wp-image-4749 size-full aligncenter\" src=\"https:\/\/gaoyapowers.com\/wp-content\/uploads\/2026\/10\/surge-arrester-diagram.webp\" alt=\"surge arrester diagram\" width=\"1000\" height=\"537\" \/>\r\n\r\nLes parafoudres HTA sont disponibles pour les r\u00e9seaux de distribution \u00e9lectrique fonctionnant sous des tensions de 11 kV, 15 kV, 22 kV, 24 kV, 33 kV et 36 kV. Selon le mod\u00e8le et les exigences de l\u2019application, ils peuvent \u00eatre con\u00e7us et test\u00e9s conform\u00e9ment \u00e0 la norme IEC 60099-4 ou IEEE C62.11.\r\n\r\n<strong>Principe de fonctionnement du parafoudre \u00e0 oxyde m\u00e9tallique<\/strong>\r\n\r\nA metal oxide surge arrester (MOA) uses zinc oxide (ZnO) varistor blocks with nonlinear voltage-current characteristics. The electrical resistance of these blocks changes with the applied voltage, allowing the arrester to limit transient overvoltages in power distribution systems.\r\n\r\nUnder normal operating voltage, the ZnO varistor blocks remain in a high-resistance state, allowing only a small leakage current to flow. When a lightning or switching overvoltage occurs, their resistance drops rapidly, allowing surge current to flow through the arrester to ground while limiting the voltage across the protected equipment.\r\n\r\nAfter the overvoltage subsides, the ZnO varistor blocks return to their high-resistance state, and the arrester continues operating normally. This process helps prevent insulation damage to distribution transformers and other connected electrical equipment.\r\n\r\n<strong>Sp\u00e9cifications techniques des parafoudres HTA<\/strong>\r\n\r\n<img class=\"wp-image-4748 aligncenter\" src=\"https:\/\/gaoyapowers.com\/wp-content\/uploads\/2026\/10\/distribution-surge-arrester-specifications.webp\" alt=\"surge arrester specifications\" width=\"800\" height=\"603\" \/>","link":"https:\/\/gaoyapowers.com\/fr\/distribution-surge-arrester\/","name":"Parafoudre HTA","slug":"distribution-surge-arrester","taxonomy":"product_cat","parent":31,"meta":[],"_links":{"self":[{"href":"https:\/\/gaoyapowers.com\/fr\/wp-json\/wp\/v2\/product_cat\/44"}],"collection":[{"href":"https:\/\/gaoyapowers.com\/fr\/wp-json\/wp\/v2\/product_cat"}],"about":[{"href":"https:\/\/gaoyapowers.com\/fr\/wp-json\/wp\/v2\/taxonomies\/product_cat"}],"up":[{"embeddable":true,"href":"https:\/\/gaoyapowers.com\/fr\/wp-json\/wp\/v2\/product_cat\/31"}],"wp:post_type":[{"href":"https:\/\/gaoyapowers.com\/fr\/wp-json\/wp\/v2\/product?product_cat=44"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}