{"id":15483,"date":"2026-01-06T10:08:27","date_gmt":"2026-01-06T02:08:27","guid":{"rendered":"http:\/\/www.erun-tech.com\/?post_type=dt_portfolio&p=15483"},"modified":"2026-01-06T11:00:02","modified_gmt":"2026-01-06T03:00:02","slug":"chuanbofadianjizhukaiguanjiegoushibiesandatuokouqiyushoudongdiandonghezhacaozuozhinan","status":"publish","type":"dt_portfolio","link":"http:\/\/www.erun-tech.com\/en\/project\/chuanbofadianjizhukaiguanjiegoushibiesandatuokouqiyushoudongdiandonghezhacaozuozhinan","title":{"rendered":"Ship generator main switch structure identification: three main disconnectors and manual\/electrical closing operation guide"},"content":{"rendered":"

Ship generator main switch (ACB) full analysis: structure, principle and practical operation<\/h1>\n

In a marine power station, the generator main switch (air circuit breaker, abbreviated as ACB) is the key hub connecting the generator and the busbar. It is not only responsible for daily closing and closing operations, but also integrates complex protection functions.<\/p>\n

I. Core body identification: three main disconnectors<\/h2>\n

The striker is the \u201cexecutive organ\u201d of the main switch, and according to the original text, the following three types of protection elements are recognized:<\/p>\n

    \n
  1. \n

    Under-voltage Release<\/b><\/p>\n

      \n
    • \n

      Role:<\/b> Voltage below rated value 40%<\/b> Forced trip; voltage above 75%<\/b> Only then can the gate be closed.<\/p>\n<\/li>\n

    • \n

      Rectification:<\/b> 35%~70% Rated voltage.<\/p>\n<\/li>\n<\/ul>\n<\/li>\n

    • \n

      Over-current Trip<\/b><\/p>\n

        \n
      • \n

        Role:<\/b> Provides short circuit protection and overload protection.<\/p>\n<\/li>\n<\/ul>\n<\/li>\n

      • \n

        Shunt Release<\/b><\/p>\n

          \n
        • \n

          Role:<\/b> Receive remote electrical signals to realize \u201cremote switching\u201d.<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n

          \n

          Second, the closing mode details: manual and electric<\/h2>\n

          The core premise of closing a gate is **\u201cstore energy first, then act \u201d**.<\/p>\n

          1. Motorized closing mode<\/h3>\n
            \n
          • \n

            Motor energy storage:<\/b> After the switch is opened, the built-in motor automatically compresses the spring for the next action.<\/p>\n<\/li>\n

          • \n

            The closing solenoid stores energy:<\/b> When the button is pressed, the coil is energized to complete the whole process of \u201cenergy storage - debuckling and then debuckling - releasing\u201d, which takes only about 0.1s.<\/p>\n<\/li>\n<\/ul>\n

            2. Manual closing method<\/h3>\n
              \n
            • \n

              For manual energy storage switches (e.g. Schneider MT or DW95), the operator needs toRepeatedly press the handle<\/b>(manual energy storage) until the energy storage indicator shows \u201cCharged\u201d or \u201cEnergy stored\u201d, then press the mechanical close button.<\/p>\n<\/li>\n<\/ul>\n

              \n

              III. Practical assessment: key points of closing and closing operation<\/h2>\n

              Candidates need to focus on the following processes according to the requirements of the original experimental set-up operation:<\/p>\n

              1. Closing logic<\/h3>\n
                \n
              • \n

                Standalone:<\/b> Check energy storage indication $\\rightarrow$<\/span> Confirm that the loss-of-voltage detent is energized (armature engaged) $\\rightarrow$<\/span> Press to close the gate.<\/p>\n<\/li>\n

              • \n

                Parallelism:<\/b> Open the synchronization table $\\rightarrow$<\/span> Waiting for synchronization point (12 o'clock) $\\rightarrow$<\/span> Press the closing gate quickly.<\/p>\n<\/li>\n<\/ul>\n

                2. Breakout logic<\/h3>\n
                  \n
                • \n

                  Standalone:<\/b> It must be followed.\u201cRemove the load first, then open the gate<\/b>\u201dPrinciples.<\/p>\n<\/li>\n

                • \n

                  Parallelism:<\/b> It must be followed.\u201cloadshifting $\\rightarrow$<\/span> The solution condition is satisfied $\\rightarrow$<\/span> sluice gate<\/b>\u201dProcess.<\/p>\n<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

                  Ship generator main switch (ACB) full analysis: structure, principle and practice In the ship power station, the generator main switch (air circuit breaker, referred to as ACB) is connected...<\/p>","protected":false},"author":1,"featured_media":15484,"comment_status":"open","ping_status":"closed","template":"","dt_portfolio_category":[891],"dt_portfolio_tags":[],"class_list":["post-15483","dt_portfolio","type-dt_portfolio","status-publish","has-post-thumbnail","hentry","dt_portfolio_category-dianzidianqiyuanshicaopinggukecheng","dt_portfolio_category-891","description-off"],"_links":{"self":[{"href":"http:\/\/www.erun-tech.com\/en\/wp-json\/wp\/v2\/dt_portfolio\/15483","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.erun-tech.com\/en\/wp-json\/wp\/v2\/dt_portfolio"}],"about":[{"href":"http:\/\/www.erun-tech.com\/en\/wp-json\/wp\/v2\/types\/dt_portfolio"}],"author":[{"embeddable":true,"href":"http:\/\/www.erun-tech.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.erun-tech.com\/en\/wp-json\/wp\/v2\/comments?post=15483"}],"version-history":[{"count":1,"href":"http:\/\/www.erun-tech.com\/en\/wp-json\/wp\/v2\/dt_portfolio\/15483\/revisions"}],"predecessor-version":[{"id":15485,"href":"http:\/\/www.erun-tech.com\/en\/wp-json\/wp\/v2\/dt_portfolio\/15483\/revisions\/15485"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.erun-tech.com\/en\/wp-json\/wp\/v2\/media\/15484"}],"wp:attachment":[{"href":"http:\/\/www.erun-tech.com\/en\/wp-json\/wp\/v2\/media?parent=15483"}],"wp:term":[{"taxonomy":"dt_portfolio_category","embeddable":true,"href":"http:\/\/www.erun-tech.com\/en\/wp-json\/wp\/v2\/dt_portfolio_category?post=15483"},{"taxonomy":"dt_portfolio_tags","embeddable":true,"href":"http:\/\/www.erun-tech.com\/en\/wp-json\/wp\/v2\/dt_portfolio_tags?post=15483"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}