{"id":676,"date":"2026-01-26T06:37:44","date_gmt":"2026-01-26T06:37:44","guid":{"rendered":"http:\/\/yieou.com\/?post_type=products&p=676"},"modified":"2026-09-16T02:09:34","modified_gmt":"2026-09-16T02:09:34","slug":"tg3-35q-260x260x395-3av3-bushing","status":"publish","type":"products","link":"https:\/\/yieou.com\/zh\/product\/tg3-35q-260x260x395-3av3-bushing\/","title":{"rendered":"TG3-35Q\/260x260x395 3AV3 \u7edd\u7f18\u5b50 (\u5de5\u9891\u8010\u538b\uff1a95kV\/1min\uff1b\u5c40\u90e8\u653e\u7535\uff1a\u22645pC @ 40.5kV)"},"content":{"rendered":"

\u4ea7\u54c1\u6982\u8ff0<\/h3>\n\n\n\n

TG3-35Q\/260\u00d7260\u00d7395 3AV3 \u5899\u5f0f\u7edd\u7f18\u5b50<\/a> \u662f\u4e00\u6b3e\u7528\u4e8e35\u5343\u4f0f\u548c40.5\u5343\u4f0f\u9ad8\u538b\u7535\u529b\u7cfb\u7edf\u7684\u73af\u6c27\u6811\u8102\u6d47\u6ce8\u7edd\u7f18\u90e8\u4ef6\u3002<\/p>\n\n\n\n

\u5b83\u4e3b\u8981\u7528\u4e8e\u8f7d\u6d41\u5bfc\u4f53\uff08\u5982\u6bcd\u7ebf\u6216\u7535\u7f06\uff09\u7a7f\u8fc7\u5f00\u5173\u8bbe\u5907\u9694\u677f\u3001\u5899\u58c1\u3001\u91d1\u5c5e\u9762\u677f\u6216\u5176\u4ed6\u63a5\u5730\u7ed3\u6784\u7684\u5730\u65b9\u3002\u5957\u7ba1\u63d0\u4f9b\u53ef\u9760\u7684\u7535\u6c14\u7edd\u7f18\u548c\u673a\u68b0\u652f\u6491\uff0c\u5e76\u5e7f\u6cdb\u7528\u4e8e\u62bd\u51fa\u5f0f switchgear<\/a>KYN61\u9ad8\u538b\u5f00\u5173\u67dc\u3001\u53d8\u7535\u7ad9\u548c\u914d\u7535\u8bbe\u5907\u3002<\/p>\n\n\n\n

Manufactured using an integrated epoxy resin APG process, the product features an optimized multi-shed structure, excellent electrical insulation, high mechanical strength, and reliable environmental adaptability. It is one of the key insulating components used in 35 kV high-voltage equipment.<\/p>\n\n\n\n

\u6280\u672f\u89c4\u683c<\/h3>\n\n\n\n
\u53c2\u6570<\/th>\u89c4\u683c<\/th><\/tr><\/thead>
\u4ea7\u54c1\u578b\u53f7<\/td>TG3-35Q\/260\u00d7260\u00d7395 3AV3<\/td><\/tr>
\u989d\u5b9a\u7535\u538b<\/td>40.5 kV, suitable for 35 kV systems<\/td><\/tr>
\u989d\u5b9a\u9891\u7387<\/td>15\u201360 Hz<\/td><\/tr>
\u6cd5\u5170\u5c3a\u5bf8<\/td>260 \u00d7 260 mm<\/td><\/tr>
\u603b\u9ad8\u5ea6<\/td>395 mm<\/td><\/tr>
\u6750\u6599<\/td>Glass-fibre-reinforced epoxy resin<\/td><\/tr>
Manufacturing Process<\/td>APG casting<\/td><\/tr>
Insulation Type<\/td>Indoor type; outdoor versions available upon request<\/td><\/tr>
\u5de5\u9891\u8010\u538b<\/td>\u226595 kV for 1 minute under dry conditions<\/td><\/tr>
\u96f7\u7535\u51b2\u51fb\u8010\u53d7\u7535\u538b<\/td>\u2265185 kV peak<\/td><\/tr>
\u5c40\u90e8\u653e\u7535<\/td>\u22645 pC at 1.1 \u00d7 Un<\/td><\/tr>
\u70ed\u7b49\u7ea7<\/td>Class F, long-term operating temperature up to 155\u00b0C<\/td><\/tr>
\u963b\u71c3\u7b49\u7ea7<\/td>UL94 V-0<\/td><\/tr>
\u722c\u7535\u8ddd\u79bb<\/td>\u22651,000 mm, suitable for Pollution Level IV environments<\/td><\/tr>
\u989d\u5b9a\u7535\u6d41\u8303\u56f4<\/td>3,150\u20135,000 A; customizable<\/td><\/tr>
Seismic Resistance<\/td>Suitable for seismic intensity up to Level 8<\/td><\/tr>
Structural Type<\/td>Unshielded 3AV3 design<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u4ea7\u54c1\u7279\u70b9<\/h3>\n\n\n\n

Excellent Electrical Insulation<\/h3>\n\n\n\n

The bushing is manufactured from an epoxy resin matrix reinforced with alkali-free glass fibre. With a volume resistivity above 10\u00b9\u00b3 \u03a9\u00b7m and low dielectric loss, it provides reliable insulation against high voltages and helps reduce the risk of electrical breakdown and surface tracking.<\/p>\n\n\n\n

The integrated APG moulding process produces a dense and uniform structure with fewer internal bubbles and voids, improving long-term dielectric performance.<\/p>\n\n\n\n

Its multi-shed profile increases the creepage distance and improves resistance to pollution flashover, condensation, moisture, and dust accumulation.<\/p>\n\n\n\n

\u9ad8\u673a\u68b0\u5f3a\u5ea6<\/h3>\n\n\n\n

The one-piece cast structure provides a flexural strength of at least 300 MPa and reliable resistance to impact, vibration, and installation stress.<\/p>\n\n\n\n

It can withstand electrodynamic forces generated by busbars during short-circuit conditions, helping prevent deformation, displacement, and cracking during operation.<\/p>\n\n\n\n

The square flange structure ensures secure installation and good compatibility with high-voltage switchgear frames.<\/p>\n\n\n\n

\u5f3a\u5927\u7684\u73af\u5883\u9002\u5e94\u6027<\/h3>\n\n\n\n

The product provides reliable performance across a wide temperature range and is resistant to:<\/p>\n\n\n\n

    \n
  • High and low temperatures<\/li>\n\n\n\n
  • Electrical and thermal ageing<\/li>\n\n\n\n
  • Oil contamination<\/li>\n\n\n\n
  • Acids and alkalis<\/li>\n\n\n\n
  • Organic solvents<\/li>\n\n\n\n
  • Moisture and condensation<\/li>\n\n\n\n
  • Mould and insects<\/li>\n<\/ul>\n\n\n\n

    The hydrophobic surface helps reduce moisture adhesion and lowers insulation risks in humid operating environments.<\/p>\n\n\n\n

    Safe and Reliable Design<\/h3>\n\n\n\n

    The low-partial-discharge structure helps maintain uniform electric field distribution and reduces the risk of accelerated insulation ageing.<\/p>\n\n\n\n

    The smooth internal and external surfaces contain no sharp edges, helping prevent electric field concentration and corona discharge.<\/p>\n\n\n\n

    The product is designed to comply with GB\/T 11022, GB\/T 3906, and other applicable standards. CCC-certified configurations can be provided according to product and project requirements.<\/p>\n\n\n\n

    The 3AV3 series uses an unshielded design, providing straightforward installation and compatibility with mainstream 35 kV withdrawable switchgear configurations.<\/p>\n\n\n\n

    \u5e94\u7528<\/h3>\n\n\n\n

    The TG3-35Q\/260\u00d7260\u00d7395 3AV3 Wall Bushing is suitable for three-phase AC power systems with rated voltages of 35 kV or 40.5 kV and frequencies from 15 to 60 Hz.<\/p>\n\n\n\n

    \u5178\u578b\u5e94\u7528\u5305\u62ec\uff1a<\/p>\n\n\n\n

      \n
    • Busbar passage insulation in KYN61 high-voltage switchgear<\/li>\n\n\n\n
    • Withdrawable high-voltage switchgear<\/li>\n\n\n\n
    • Switchgear partition and wall penetrations<\/li>\n\n\n\n
    • Busbar connections between transformers and switchgear<\/li>\n\n\n\n
    • Substation power distribution equipment<\/li>\n\n\n\n
    • High-voltage distribution rooms in industrial facilities<\/li>\n\n\n\n
    • Power plants and utility power distribution systems<\/li>\n\n\n\n
    • Busbar and conductor insulation support<\/li>\n\n\n\n
    • 35 kV vacuum circuit breakers<\/li>\n\n\n\n
    • Disconnectors and isolating switches<\/li>\n\n\n\n
    • Current transformers and other high-voltage components<\/li>\n<\/ul>\n\n\n\n

      \u64cd\u4f5c\u6761\u4ef6<\/h3>\n\n\n\n

      Standard Operating Environment<\/h3>\n\n\n\n
      Condition<\/th>Requirement<\/th><\/tr><\/thead>
      \u73af\u5883\u6e29\u5ea6<\/td>-40\u00b0C to +40\u00b0C for indoor models<\/td><\/tr>
      Customized Outdoor Temperature<\/td>-40\u00b0C to +80\u00b0C<\/td><\/tr>
      Installation Altitude<\/td>\u22641,000 m<\/td><\/tr>
      Monthly Average Relative Humidity<\/td>\u226490% at 25\u00b0C<\/td><\/tr>
      \u51b7\u51dd<\/td>Not permitted under normal operating conditions<\/td><\/tr>
      Frost Formation<\/td>Not permitted<\/td><\/tr>
      Seismic Intensity<\/td>\u2264Level 8<\/td><\/tr>
      \u5b89\u88c5\u4f4d\u7f6e<\/td>Indoor; outdoor versions available<\/td><\/tr>
      Corrosive or Flammable Gases<\/td>Not permitted<\/td><\/tr>
      Severe Dust or Salt Spray<\/td>Special configuration required<\/td><\/tr>
      Frequent Severe Vibration<\/td>Not permitted<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

      High-Altitude Conditions<\/h3>\n\n\n\n

      For installations above 1,000 metres, the effects of reduced air insulation and heat dissipation should be considered.<\/p>\n\n\n\n

      As a general selection reference, the rated current may need to be reduced by approximately 10% for each additional 1,000 metres of altitude. Alternatively, a reinforced high-altitude version can be customized.<\/p>\n\n\n\n

      The final derating factor should be confirmed according to the complete switchgear design and applicable technical requirements.<\/p>\n\n\n\n

      Heavily Polluted Environments<\/h3>\n\n\n\n

      For areas exposed to severe dust, salt spray, conductive pollution, or high humidity, the following customized options are available:<\/p>\n\n\n\n

        \n
      • Extended creepage distance<\/li>\n\n\n\n
      • Additional or enlarged sheds<\/li>\n\n\n\n
      • RTV anti-pollution flashover coating<\/li>\n\n\n\n
      • Enhanced sealing structure<\/li>\n\n\n\n
      • Customized insulation profile<\/li>\n<\/ul>\n\n\n\n

        Low-Temperature Conditions<\/h3>\n\n\n\n

        A cold-resistant epoxy resin formulation can be selected to maintain mechanical strength and insulation performance at temperatures down to -40\u00b0C.<\/p>\n\n\n\n

        \u5b89\u88c5\u8981\u6c42<\/h3>\n\n\n\n

        Flange Installation<\/h3>\n\n\n\n

        The flange must fit closely against the switchgear panel, wall, or mounting partition.<\/p>\n\n\n\n

        All mounting bolts should be tightened evenly according to the specified torque. Uneven or excessive tightening may produce local stress and damage the epoxy resin structure.<\/p>\n\n\n\n

        Conductor Alignment<\/h3>\n\n\n\n

        The conductive rod or busbar must be installed coaxially with the inner opening of the bushing.<\/p>\n\n\n\n

        Incorrect alignment may cause mechanical stress, uneven electrical clearances, or electric field distortion.<\/p>\n\n\n\n

        Do not force an oversized or misaligned conductor through the bushing.<\/p>\n\n\n\n

        Surface Cleaning<\/h3>\n\n\n\n

        Before installation, clean the bushing surface thoroughly and remove:<\/p>\n\n\n\n

          \n
        • Dust<\/li>\n\n\n\n
        • Oil<\/li>\n\n\n\n
        • Moisture<\/li>\n\n\n\n
        • Metal particles<\/li>\n\n\n\n
        • Packaging residue<\/li>\n\n\n\n
        • Other contaminants<\/li>\n<\/ul>\n\n\n\n

          The insulating surface must remain clean and dry to maintain reliable dielectric performance.<\/p>\n\n\n\n

          \u7535\u6c14\u95f4\u9699<\/h3>\n\n\n\n

          After installation, check the clearance between the conductor, bushing, grounded metal parts, and adjacent electrical components.<\/p>\n\n\n\n

          The completed assembly must meet the insulation coordination and minimum electrical clearance requirements of the 35 kV system.<\/p>\n\n\n\n

          Inspection and Maintenance<\/h2>\n\n\n\n

          Regularly inspect the bushing for:<\/p>\n\n\n\n

            \n
          • Surface cracks<\/li>\n\n\n\n
          • Electrical tracking marks<\/li>\n\n\n\n
          • Carbonization<\/li>\n\n\n\n
          • Contamination accumulation<\/li>\n\n\n\n
          • Moisture or condensation<\/li>\n\n\n\n
          • Mechanical deformation<\/li>\n\n\n\n
          • Loose mounting bolts<\/li>\n\n\n\n
          • Abnormal partial discharge<\/li>\n\n\n\n
          • Arc or corona damage<\/li>\n<\/ul>\n\n\n\n

            Clean the surface using a dry, soft, lint-free cloth. Do not use abrasive tools, metal brushes, or corrosive solvents.<\/p>\n\n\n\n

            An insulation preventive test is recommended every three to five years, depending on the operating conditions and maintenance plan. Typical tests may include:<\/p>\n\n\n\n

              \n
            • Power-frequency withstand voltage testing<\/li>\n\n\n\n
            • Partial discharge measurement<\/li>\n\n\n\n
            • Insulation resistance testing<\/li>\n\n\n\n
            • Visual inspection of the insulating surface<\/li>\n<\/ul>\n\n\n\n

              Do not hang heavy objects from the bushing or apply additional mechanical loads that are not included in the equipment design.<\/p>\n\n\n\n

              Stop operation and replace the bushing immediately if severe cracking, electrical tracking, carbonization, deformation, or abnormal partial discharge is detected.<\/p>\n\n\n\n

              \u6a21\u578b\u63cf\u8ff0<\/h2>\n\n\n\n
              Code<\/th>\u63cf\u8ff0<\/th><\/tr><\/thead>
              TG3<\/td>Epoxy resin wall bushing series<\/td><\/tr>
              35Q<\/td>Rated for 35 kV systems; Q indicates indoor configuration<\/td><\/tr>
              260\u00d7260<\/td>Flange mounting dimensions in millimetres<\/td><\/tr>
              395<\/td>Overall height in millimetres<\/td><\/tr>
              3AV3<\/td>Unshielded structural configuration for 35 kV withdrawable switchgear<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

              Selection Recommendations<\/h2>\n\n\n\n

              For rated currents above 5,000 A, a customized version with a larger internal diameter, optimized conductor structure, or integrated shielding can be supplied.<\/p>\n\n\n\n

              Outdoor installation requires an outdoor-type version, normally identified by the suffix W<\/strong>, together with a suitable weather-resistant shed and rain-protection structure.<\/p>\n\n\n\n

              For Pollution Level IV or more demanding environments, a model with an extended creepage distance is recommended, such as the TG3-35Q\/260\u00d7260\u00d7450<\/strong> configuration.<\/p>\n\n\n\n

              \"TG3-35Q-260x260x395-3AV3-\u886c\u5957\"<\/figure>\n\n
              \n\n\t\t\n
                \n\t\t\t <\/ul>\n <\/div>","protected":false},"excerpt":{"rendered":"

                Product Overview The TG3-35Q\/260\u00d7260\u00d7395 3AV3 Wall Bushing is an epoxy resin cast insulating component designed for 35 kV and 40.5 […]<\/p>\n","protected":false},"featured_media":677,"template":"","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"product_category":[34],"class_list":["post-676","products","type-products","status-publish","has-post-thumbnail","hentry","product_category-insulation-components-series"],"acf":{"products_imagines":[677,678],"short_describe":"

                The TG3-35Q\/260×260×395 3AV3 Wall Bushing is an epoxy resin cast insulating component designed for 35 kV and 40.5 kV high-voltage power systems.<\/p>","pdf_file":"","related_products":{"products":""},"technical_parameter":"","outline_and_installation_dimension":""},"_links":{"self":[{"href":"https:\/\/yieou.com\/zh\/wp-json\/wp\/v2\/products\/676","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yieou.com\/zh\/wp-json\/wp\/v2\/products"}],"about":[{"href":"https:\/\/yieou.com\/zh\/wp-json\/wp\/v2\/types\/products"}],"acf:attachment":[{"embeddable":true,"href":"https:\/\/yieou.com\/zh\/wp-json\/wp\/v2\/media\/678"},{"embeddable":true,"href":"https:\/\/yieou.com\/zh\/wp-json\/wp\/v2\/media\/677"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/yieou.com\/zh\/wp-json\/wp\/v2\/media\/677"}],"wp:attachment":[{"href":"https:\/\/yieou.com\/zh\/wp-json\/wp\/v2\/media?parent=676"}],"wp:term":[{"taxonomy":"product_category","embeddable":true,"href":"https:\/\/yieou.com\/zh\/wp-json\/wp\/v2\/product_category?post=676"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}