{"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\nCh\u1ed1ng s\u00e9t van trung th\u1ebf c\u00f3 s\u1eb5n cho c\u00e1c h\u1ec7 th\u1ed1ng ph\u00e2n ph\u1ed1i \u0111i\u1ec7n v\u1eadn h\u00e0nh \u1edf c\u1ea5p \u0111i\u1ec7n \u00e1p 10 kV, 35 kV. T\u00f9y thu\u1ed9c v\u00e0o model v\u00e0 y\u00eau c\u1ea7u \u1ee9ng d\u1ee5ng, thi\u1ebft b\u1ecb c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf v\u00e0 th\u1eed nghi\u1ec7m theo ti\u00eau chu\u1ea9n IEC 60099-4 ho\u1eb7c IEEE C62.11.\r\n\r\n<strong>Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a ch\u1ed1ng s\u00e9t van oxit kim lo\u1ea1i<\/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>Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a ch\u1ed1ng s\u00e9t van trung th\u1ebf<\/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\/vi\/distribution-surge-arrester\/","name":"Ch\u1ed1ng s\u00e9t van trung th\u1ebf","slug":"distribution-surge-arrester","taxonomy":"product_cat","parent":31,"meta":[],"_links":{"self":[{"href":"https:\/\/gaoyapowers.com\/vi\/wp-json\/wp\/v2\/product_cat\/44"}],"collection":[{"href":"https:\/\/gaoyapowers.com\/vi\/wp-json\/wp\/v2\/product_cat"}],"about":[{"href":"https:\/\/gaoyapowers.com\/vi\/wp-json\/wp\/v2\/taxonomies\/product_cat"}],"up":[{"embeddable":true,"href":"https:\/\/gaoyapowers.com\/vi\/wp-json\/wp\/v2\/product_cat\/31"}],"wp:post_type":[{"href":"https:\/\/gaoyapowers.com\/vi\/wp-json\/wp\/v2\/product?product_cat=44"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}