{"id":1779,"date":"2026-09-21T16:00:11","date_gmt":"2026-09-21T08:00:11","guid":{"rendered":"https:\/\/www.zzanwke.com\/?post_type=cxb_products&#038;p=1779"},"modified":"2026-09-28T16:54:41","modified_gmt":"2026-09-28T08:54:41","slug":"hy5wz-surge-arrester","status":"publish","type":"cxb_products","link":"https:\/\/www.zzanwke.com\/zh\/products\/hy5wz-surge-arrester\/","title":{"rendered":"HY5WZ Zinc oxide  Arrester"},"content":{"rendered":"<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"700\" height=\"393\" src=\"https:\/\/www.zzanwke.com\/wp-content\/uploads\/2026\/09\/\u9ad8\u538b\u5143\u4ef6-HY5WZ\u67dc\u5185\u5b89\u88c5\u56fe.png\" alt=\"\" class=\"wp-image-1913\" srcset=\"https:\/\/www.zzanwke.com\/wp-content\/uploads\/2026\/09\/\u9ad8\u538b\u5143\u4ef6-HY5WZ\u67dc\u5185\u5b89\u88c5\u56fe.png 700w, https:\/\/www.zzanwke.com\/wp-content\/uploads\/2026\/09\/\u9ad8\u538b\u5143\u4ef6-HY5WZ\u67dc\u5185\u5b89\u88c5\u56fe-18x10.png 18w, https:\/\/www.zzanwke.com\/wp-content\/uploads\/2026\/09\/\u9ad8\u538b\u5143\u4ef6-HY5WZ\u67dc\u5185\u5b89\u88c5\u56fe-500x281.png 500w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"700\" height=\"393\" src=\"https:\/\/www.zzanwke.com\/wp-content\/uploads\/2026\/09\/\u9ad8\u538b\u5143\u4ef6-HY5WZ\u5e94\u7528\u56fe.png\" alt=\"\" class=\"wp-image-1914\" srcset=\"https:\/\/www.zzanwke.com\/wp-content\/uploads\/2026\/09\/\u9ad8\u538b\u5143\u4ef6-HY5WZ\u5e94\u7528\u56fe.png 700w, https:\/\/www.zzanwke.com\/wp-content\/uploads\/2026\/09\/\u9ad8\u538b\u5143\u4ef6-HY5WZ\u5e94\u7528\u56fe-18x10.png 18w, https:\/\/www.zzanwke.com\/wp-content\/uploads\/2026\/09\/\u9ad8\u538b\u5143\u4ef6-HY5WZ\u5e94\u7528\u56fe-500x281.png 500w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">HY5WZ Zinc Oxide Surge Arrester<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1. Product Overview<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">HY5WZ zinc oxide surge arrester is a high-voltage primary protection component widely used in medium voltage switchgear, busbar systems, transformer cabinets, ring main units and power distribution panels. It is designed to protect electrical equipment from lightning overvoltage, switching overvoltage and temporary overvoltage.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This surge arrester uses zinc oxide resistor elements as the core protection material. Under normal operating voltage, it presents high impedance and does not affect the normal operation of the system. When overvoltage occurs, the zinc oxide resistor stack quickly conducts and limits the voltage to a safe level, thereby protecting insulation, transformers, switchgear and other key equipment.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2. Main Features<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>High voltage surge protection component for medium voltage systems<\/li>\n\n\n\n<li>Zinc oxide resistor stack as core element<\/li>\n\n\n\n<li>Excellent non-linear voltage-current characteristic<\/li>\n\n\n\n<li>Fast response to lightning and switching overvoltage<\/li>\n\n\n\n<li>Low residual voltage and high energy absorption capacity<\/li>\n\n\n\n<li>Reliable sealing structure for indoor and outdoor applications<\/li>\n\n\n\n<li>Compact design for switchgear and substation installation<\/li>\n\n\n\n<li>Used for overvoltage protection, insulation coordination and equipment safety<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">3. Technical Specifications<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Item<\/strong><\/td><td><strong>Typical Specification<\/strong><\/td><\/tr><\/thead><tbody><tr><td>Product Type<\/td><td>Zinc Oxide Surge Arrester<\/td><\/tr><tr><td>Model<\/td><td>HY5WZ<\/td><\/tr><tr><td>Rated Voltage<\/td><td>10kV \/ 12kV class or as required<\/td><\/tr><tr><td>Continuous Operating Voltage<\/td><td>According to system requirement<\/td><\/tr><tr><td>Nominal Discharge Current<\/td><td>5kA \/ 10kA \/ 20kA as required<\/td><\/tr><tr><td>Residual Voltage<\/td><td>Low residual voltage under standard impulse current<\/td><\/tr><tr><td>Protection Level<\/td><td>Suitable for MV equipment insulation protection<\/td><\/tr><tr><td>Core Material<\/td><td>Zinc oxide resistor elements<\/td><\/tr><tr><td>Insulation Housing<\/td><td>Porcelain or polymer housing optional<\/td><\/tr><tr><td>Installation<\/td><td>Switchgear mounting, substation mounting, busbar connection<\/td><\/tr><tr><td>Application<\/td><td>Lightning overvoltage protection, switching overvoltage protection<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">4. Structure Description<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Part<\/strong><\/td><td><strong>Function<\/strong><\/td><\/tr><\/thead><tbody><tr><td>High Voltage Terminal<\/td><td>Connects to the protected high voltage busbar or conductor<\/td><\/tr><tr><td>Insulating Housing<\/td><td>Provides electrical insulation and mechanical protection<\/td><\/tr><tr><td>Zinc Oxide Resistor Stack<\/td><td>Limits overvoltage through non-linear resistance characteristic<\/td><\/tr><tr><td>Metal Electrodes<\/td><td>Ensure reliable electrical connection between resistor elements<\/td><\/tr><tr><td>Sealing Structure<\/td><td>Prevents moisture, dust and external contamination<\/td><\/tr><tr><td>Grounding Terminal<\/td><td>Connects to the system grounding point<\/td><\/tr><tr><td>Mounting Fitting<\/td><td>Fixes the arrester inside switchgear or on support structure<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">5. Working Principle<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Under normal system voltage, the zinc oxide resistor stack inside the HY5WZ surge arrester remains in a high-impedance state. Only a very small leakage current flows through the arrester, which does not affect the normal operation of the power system.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When lightning overvoltage, switching overvoltage or temporary overvoltage occurs, the zinc oxide resistor elements rapidly change from high impedance to low impedance. The arrester conducts the surge current to ground and limits the voltage across the protected equipment. After the overvoltage disappears, the arrester returns to its high-impedance state automatically.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">6. Application Scope<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">HY5WZ surge arrester is commonly used in:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Medium voltage switchgear<\/li>\n\n\n\n<li>Ring main unit<\/li>\n\n\n\n<li>Transformer cabinet<\/li>\n\n\n\n<li>Busbar protection panel<\/li>\n\n\n\n<li>High voltage metering cabinet<\/li>\n\n\n\n<li>Substation equipment protection<\/li>\n\n\n\n<li>Industrial power distribution systems<\/li>\n\n\n\n<li>Commercial building MV systems<\/li>\n\n\n\n<li>Renewable energy power stations<\/li>\n\n\n\n<li>Municipal power grid projects<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">7. Installation Instructions<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>Before installation, check the arrester housing for cracks, damage or deformation.<\/li>\n\n\n\n<li>Verify the model, rated voltage, nominal discharge current and protection level according to the project requirements.<\/li>\n\n\n\n<li>Install the arrester in a position with sufficient safety clearance from other live parts.<\/li>\n\n\n\n<li>Connect the high voltage terminal firmly to the protected busbar or conductor.<\/li>\n\n\n\n<li>Connect the grounding terminal reliably to the system grounding point.<\/li>\n\n\n\n<li>Keep the grounding conductor as short and straight as possible to reduce residual inductance.<\/li>\n\n\n\n<li>After installation, perform insulation test and continuity check before commissioning.<\/li>\n\n\n\n<li>Regularly check the surface condition, sealing parts and grounding connection during operation.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">8. Safety Warnings<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Installation, testing and maintenance must be performed by qualified electrical personnel.<\/li>\n\n\n\n<li>Do not work on energized high voltage equipment.<\/li>\n\n\n\n<li>Before maintenance, isolate all upstream power supply and confirm that the circuit is fully de-energized.<\/li>\n\n\n\n<li>Do not touch the arrester and connecting parts before the system is grounded.<\/li>\n\n\n\n<li>Ensure reliable grounding of the arrester grounding terminal.<\/li>\n\n\n\n<li>If cracks, damage, tracking or abnormal discharge marks appear on the housing, stop operation immediately.<\/li>\n\n\n\n<li>Keep the product nameplate and technical documents for future reference.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">9. Ordering Information<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When placing an order, please provide the following information:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Product model: HY5WZ<\/li>\n\n\n\n<li>Rated voltage<\/li>\n\n\n\n<li>Nominal discharge current<\/li>\n\n\n\n<li>Residual voltage requirement<\/li>\n\n\n\n<li>Housing type: porcelain or polymer<\/li>\n\n\n\n<li>Installation condition<\/li>\n\n\n\n<li>Quantity<\/li>\n\n\n\n<li>Applicable standard or destination market requirement<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">10. Packing and Export Note<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Each HY5WZ zinc oxide surge arrester is packed with shockproof foam material and then placed into an export carton. The packaging is reinforced to protect the product from collision, moisture and vibration during sea, land or air transportation. Neutral English labeling is available according to export requirements.<\/p>","protected":false},"excerpt":{"rendered":"<p>HY5WZ Zinc Oxide Surge Arrester 1. Product Overview HY5WZ zinc oxide surge arrester is a high-voltage primary protection component widely [&hellip;]<\/p>\n","protected":false},"featured_media":1916,"menu_order":0,"template":"","cxb_product_category":[14,30],"cxb_product_tag":[],"class_list":["post-1779","cxb_products","type-cxb_products","status-publish","has-post-thumbnail","hentry","cxb_product_category-sheet-metal-equipment","cxb_product_category-high-voltage-primary-components"],"_links":{"self":[{"href":"https:\/\/www.zzanwke.com\/zh\/wp-json\/wp\/v2\/cxb_products\/1779","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.zzanwke.com\/zh\/wp-json\/wp\/v2\/cxb_products"}],"about":[{"href":"https:\/\/www.zzanwke.com\/zh\/wp-json\/wp\/v2\/types\/cxb_products"}],"version-history":[{"count":3,"href":"https:\/\/www.zzanwke.com\/zh\/wp-json\/wp\/v2\/cxb_products\/1779\/revisions"}],"predecessor-version":[{"id":1917,"href":"https:\/\/www.zzanwke.com\/zh\/wp-json\/wp\/v2\/cxb_products\/1779\/revisions\/1917"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.zzanwke.com\/zh\/wp-json\/wp\/v2\/media\/1916"}],"wp:attachment":[{"href":"https:\/\/www.zzanwke.com\/zh\/wp-json\/wp\/v2\/media?parent=1779"}],"wp:term":[{"taxonomy":"cxb_product_category","embeddable":true,"href":"https:\/\/www.zzanwke.com\/zh\/wp-json\/wp\/v2\/cxb_product_category?post=1779"},{"taxonomy":"cxb_product_tag","embeddable":true,"href":"https:\/\/www.zzanwke.com\/zh\/wp-json\/wp\/v2\/cxb_product_tag?post=1779"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}