山東MNS低壓抽屜柜關聯的高壓開關柜，遠方分合閘怎么實現？

　　How to remotely open and close the high-voltage switchgear associated with the Shandong MNS low-voltage drawer cabinet?

　　在山東電氣成套設備的配置中，變壓器作為電力轉換的核心部件，其配套的高壓進線開關選型直接關系到設備和運行穩定性。不少企業采購或運維山東電氣成套設備時，都會困惑：多大容量的變壓器該用負荷開關，多大的該用斷路器？負荷開關與熔斷器又適配哪些情況？其實答案很明確，核心就是看變壓器的容量大小。今天就專門圍繞這個問題科普，幫大家理清不同容量變壓器對應的開關選型邏輯。

　　In the configuration of Shandong Electric's complete set of equipment, transformers are the core components of power conversion, and the selection of their matching high-voltage incoming line switches directly affects the safety and operational stability of the equipment. Many companies are confused when purchasing or operating complete sets of equipment from Shandong Electric: what capacity transformer should use a load switch, and what size should use a circuit breaker? What are the suitable situations for load switches and fuses? The answer is actually very clear, the core is to look at the capacity of the transformer. Today, we will focus on this topic to popularize science and help everyone clarify the switch selection logic corresponding to transformers of different capacities.

　　先給大家梳理一下核心部件，看懂這些部件的作用，原理就好理解了。在高壓開關柜的遠方分合閘控制回路中，有一個核心“大腦”——微機保護裝置（原理圖中標注為1n），里面集成了兩個關鍵繼電器：YTJ是遙控跳閘繼電器，YHJ是遙控合閘繼電器，這兩個繼電器是接收遠程指令的核心部件。除此之外，還有合閘保持繼電器（HBJ）和跳閘保持繼電器（TBJ），它們負責確保合閘或跳閘動作能穩定完成。另外，還有轉換開關、壓板等輔助部件，共同構成完整的控制回路。

　　Let me first outline the core components and understand their functions, so that we can better understand their principles. In the remote opening and closing control circuit of the high-voltage switchgear, there is a core "brain" - the microcomputer protection device (marked as 1n in the schematic diagram), which integrates two key relays: YTJ is the remote tripping relay, YHJ is the remote closing relay, and these two relays are the core components for receiving remote commands. In addition, there are closing holding relays (HBJ) and tripping holding relays (TBJ), which are responsible for ensuring that the closing or tripping action can be completed stably. In addition, there are auxiliary components such as conversion switches and pressure plates, which together form a complete control circuit.

　　咱們先講遠方合閘的實現過程，這是高壓開關柜投入運行的關鍵一步。，正電源會接入控制回路，工作人員需要把轉換開關打到“遠方”模式，這時回路中的19-20觸點會接通，相當于給遠方控制“解鎖”。之后，電流會通過壓板傳輸到微機保護裝置一側，當后臺發出遠方合閘指令時，微機保護裝置里的YHJ（遙控合閘繼電器）就會瞬時動作閉合——這里要注意，YHJ是瞬動型繼電器，收到指令后會立刻響應。

　　Let's first talk about the implementation process of remote closing, which is a crucial step in the operation of high-voltage switchgear. Firstly, the positive power supply will be connected to the control circuit, and the staff needs to turn the conversion switch to the "remote" mode. At this time, the 19-20 contacts in the circuit will be connected, which is equivalent to unlocking the remote control. Afterwards, the current will be transmitted to one side of the microcomputer protection device through the pressure plate. When a remote closing command is issued from the background, the YHJ (remote closing relay) in the microcomputer protection device will instantly close - it should be noted that YHJ is an instantaneous relay that will respond immediately upon receiving the command.

　　YHJ閉合后，電流會進入微機保護裝置內部，接著傳輸到HBJ（合閘保持繼電器），HBJ會隨之動作。一旦HBJ動作，它對應的觸點就會閉合，形成穩定的電流通路，這個電流會直接驅動高壓開關柜內的斷路器，完成合閘動作。可能有朋友會問，為啥需要HBJ這個合閘保持繼電器？因為YHJ是瞬動型的，只能短暫閉合，而合閘動作需要穩定的電流驅動，HBJ的作用就是在YHJ斷開后，繼續保持電流通路，確保合閘動作完整、可靠，避免出現“合閘中途失敗”的情況。

　　After YHJ is closed, the current will enter the microcomputer protection device and then be transmitted to HBJ (closing and holding relay), and HBJ will act accordingly. Once the HBJ is activated, its corresponding contact will close, forming a stable current path. This current will directly drive the circuit breaker inside the high-voltage switchgear to complete the closing action. Some friends may ask, why do we need the HBJ closing and holding relay? Because YHJ is a momentary action type, it can only be closed briefly, and the closing action requires stable current drive. The function of HBJ is to continue to maintain the current path after YHJ is disconnected, ensuring the integrity and reliability of the closing action and avoiding the situation of "failure during closing".

　　再來說遠方跳閘的原理，和合閘過程類似，只是核心繼電器和控制邏輯不同。當需要遠程切斷電路時，工作人員在后臺發出遠方跳閘指令，這時控制回路中對應跳閘的觸點會閉合，電流會沿著預設的通路傳輸過來，直接觸發TBJ（跳閘保持繼電器）動作。TBJ動作后，它前面的觸點會隨之閉合，形成穩定的跳閘電流回路，這個電流會驅動斷路器的跳閘機構，讓斷路器快速斷開，完成遠方跳閘。同樣，TBJ的作用是保持跳閘電流的穩定，確保跳閘動作徹底完成，避免出現“跳閘不徹底”導致的電路故障。

　　Speaking of the principle of remote tripping, it is similar to the closing process, except that the core relay and control logic are different. When it is necessary to remotely cut off the circuit, the staff will issue a remote tripping command in the background. At this time, the corresponding tripping contacts in the control circuit will close, and the current will be transmitted along the preset path, directly triggering the TBJ (trip holding relay) action. After the action of TBJ, its front contacts will close, forming a stable tripping current circuit. This current will drive the tripping mechanism of the circuit breaker, allowing it to quickly disconnect and complete remote tripping. Similarly, the function of TBJ is to maintain the stability of the tripping current, ensure that the tripping action is completely completed, and avoid circuit faults caused by "incomplete tripping".

　　這里要給大家補充兩個關鍵注意點，這也是保障遠方分合閘可靠運行的核心。個是轉換開關的模式切換，必須確認打到“遠方”模式，19-20觸點接通后，遠方指令才能生效；如果在“就地”模式，遠方指令是無法觸發繼電器動作的，這是為了避免就地操作和遠方操作沖突。第二個是壓板的作用，壓板相當于控制回路的“開關”，投入壓板后回路才接通，退出壓板則遠方控制失效，日常運維中可以通過壓板快速隔離控制回路，方便檢修。

　　Here are two key points to note, which are also the core of ensuring reliable operation of remote switching. The first one is the mode switching of the transfer switch, which must be confirmed to be in the "remote" mode. The remote command can only take effect after the 19-20 contacts are connected; If in "local" mode, remote commands cannot trigger relay actions, in order to avoid conflicts between local and remote operations. The second function is the pressure plate, which acts as a "safety switch" for the control circuit. The circuit is only connected when the pressure plate is activated, and remote control fails when the pressure plate is deactivated. In daily operation and maintenance, the pressure plate can be used to quickly isolate the control circuit for easy maintenance.

　　對山東本地企業的運維人員來說，了解這個原理有啥實際意義呢？一方面，能快速排查遠方分合閘故障，比如遇到遠方無法合閘時，可先檢查轉換開關是否在遠方模式、合閘壓板是否投入，再排查YHJ和HBJ繼電器是否正常動作；另一方面，能更規范地操作設備，避免誤操作導致的事故。另外，山東MNS低壓抽屜柜與高壓開關柜聯動運行時，遠方分合閘功能能讓整個配電系統的控制更，尤其適合大型工廠、車間等大面積配電場景，減少運維人員的現場奔波。

　　What is the practical significance for the operation and maintenance personnel of local enterprises in Shandong to understand this principle? On the one hand, it can quickly troubleshoot remote opening and closing faults. For example, when encountering remote failure to close, it can first check whether the transfer switch is in remote mode, whether the closing pressure plate is engaged, and then check whether the YHJ and HBJ relays are working properly; On the other hand, it can operate the equipment more standardized and avoid safety accidents caused by misoperation. In addition, when the Shandong MNS low-voltage drawer cabinet is linked with the high-voltage switchgear, the remote opening and closing function can make the control of the entire power distribution system more efficient, especially suitable for large-scale power distribution scenarios such as large factories and workshops, reducing the on-site travel of operation and maintenance personnel.

　　總結下來，高壓開關柜的遠方分合閘，核心是靠“微機保護裝置+專用繼電器+控制回路”的協同工作：合閘靠YHJ觸發、HBJ保持，跳閘靠TBJ觸發保持，再通過轉換開關和壓板保障操作。這種設計不僅提升了運維效率，還降低了現場操作的風險，與山東MNS低壓抽屜柜配合使用時，能讓整個配電系統更智能、更可靠。如果大家在實際運維中遇到遠方分合閘相關問題，不妨先對照原理圖檢查核心部件和回路，也可以咨詢的山東電氣成套廠家獲取技術支持。

　　In summary, the remote opening and closing of high-voltage switchgear relies on the collaborative work of "microcomputer protection device+dedicated relay+control circuit": closing is triggered by YHJ and maintained by HBJ, tripping is triggered and maintained by TBJ, and operation safety is guaranteed through transfer switches and pressure plates. This design not only improves operation and maintenance efficiency, but also reduces safety risks during on-site operations. When used in conjunction with Shandong MNS low-voltage drawer cabinets, it can make the entire distribution system more intelligent and reliable. If you encounter problems related to remote switching in actual operation and maintenance, you may first check the core components and circuits by referring to the schematic diagram, or consult a professional Shandong Electric complete set manufacturer for technical support.

　　本文由 山東MNS低壓抽屜柜 友情奉獻.更多有關的知識請點擊  http://www.moca.net.cn/   真誠的態度.為您提供為的服務.更多有關的知識我們將會陸續向大家奉獻.敬請期待.

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