Marine external power supply-shore power integrated box
By designing a marine external power supply-shore power integrated box, the shore power capacity adjustment is achieved using mechanical interlocking circuit breakers and cable protection circuit breakers, and reducing the risk of electric shock through self-locking buttons, the problems of fixed shore power capacity and no anti-electric shock protection in the existing technology are solved, and flexible capacity adjustment and improved operating safety are achieved.
Patent Information
- Application Number
- CN202411671535.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-02-28
AI Technical Summary
The capacity of existing marine shore power boxes is fixed, and the shore power capacity cannot be adjusted, and the differences in shore power facilities of different terminals are not conducive to improving the later mission functions of rescue ships. At the same time, the existing marine shore power boxes do not have anti-electric shock protection function, and the operators of shore power cable connections have a risk of live operation.
A marine external power supply-shore power integrated box is designed, and the external power supply circuit breaker and the shore power circuit breaker are respectively connected to the busbar and are mechanically interlocked with each other, combined with multiple cable protection circuit breakers and phase sequence switching circuits, and the capacity adjustment of the shore power or external power supply cable is realized, and the risk of electric shock is reduced through the self-locking button.
It realizes flexible adjustment of external power supply/shore power capacity, adapts to the differences in shore power facilities of different terminals, and improves the multi-working and multi-task functions of rescue ships. At the same time, through the design of the self-locking button, the risk of electric shock is reduced and the operation safety is improved.
Smart Images
Figure CN119542949A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of ships, and in particular to a ship-used external power supply-shore power integrated box. Background Art
[0002] When a ship is at port, it is usually necessary to use the shore power of the dock to supply power to the ship's power grid, which is conducive to the maintenance of ship equipment, and can also reduce the degree of noise pollution from the ship and reduce the workload of staff on duty. However, conventional shore power boxes only have the function of receiving shore power supply, and their capacity cannot be adjusted according to power conditions. Some ships are also equipped with medium-voltage shore power systems, but there are few docks with medium-voltage shore power facilities, and the use of berthing docks is limited.
[0003] In addition, if rescue and multi-functional ships need to supply power to the outside, they must be equipped with a separate power supply box. During the power supply process, the number of power supply circuits and power supply capacity cannot be adjusted according to actual needs, and they can only supply power to a single ship under the designed capacity.
[0004] At the same time, the large-capacity shore power box is equipped with multiple shore power cables in parallel for power supply, and the shore power cables are stored on cable reels. The shore power closing and opening operations are generally performed near the shore power box, but during the shore power connection operation, if the main switch of the shore power box is accidentally closed, it will cause the risk of electric shock to the personnel performing the shore power cable connection operation.
[0005] In summary, the existing shore power boxes for ships have a fixed capacity and cannot adjust the shore power capacity. Therefore, the existing shore power boxes for ships can only perform shore power connection / external power supply operations according to the designed fixed capacity, and cannot adjust the capacity according to different needs. Therefore, they cannot adapt to the differences in shore power facilities at different terminals, and are not conducive to the improvement of the later mission functions of rescue ships. In other words, the external power supply mode that does not have the ability to flexibly adjust the external power supply capacity can no longer adapt to the multi-condition and multi-task characteristics of rescue ships. In addition, the existing shore power boxes for ships have no anti-electric shock protection function, and the shore power cable connection operators are at risk of live operation. When operating the shore power connection operation, the operators cannot control the shore power box closing and opening operations. If the operation is improperly performed, live operations are likely to cause electric shock safety accidents. Summary of the invention
[0006] In order to solve the above technical problems, the present invention provides a ship-used external power supply-shore power integrated box.
[0007] The present invention solves the above technical problems through the following technical solutions:
[0008] A ship-based external power supply-shore power integrated box, comprising: an external power supply circuit breaker and a shore power circuit breaker respectively connected to a busbar and mechanically interlocked with each other, the external power supply circuit breaker being connected to a distribution panel of a main distribution board of the ship to receive power from the main distribution board for external power supply, and the shore power circuit breaker being connected to another distribution panel of the main distribution board to send power connected to the shore power to the main distribution board; and a plurality of cable protection circuit breakers respectively connected to the busbar, each of the cable protection circuit breakers being connected to a shore power-external power supply cable after a phase sequence switching circuit to receive shore power or external power supply.
[0009] Preferably, the shunt coil of each cable protection circuit breaker is extended to the self-locking button through an auxiliary contact. Therefore, the integrated box of the present invention can also reduce the risk of electric shock that may occur during the external power supply / shore power connection process. During the shore power connection process, the corresponding shore power cable power supply circuit breaker is kept in an open state through the self-locking button to prevent live work. When the shore power cable is properly connected, the self-locking is released to allow the cable to carry current.
[0010] Preferably, each of the phase sequence switching circuits is composed of two groups of contactors that perform circuit switching after determining the phase sequence through a phase sequence relay.
[0011] Preferably, the plurality of cable protection circuit breakers include four cable protection circuit breakers. Thus, the capacity of shore power access / external power supply of the present invention can be adjusted in four levels. The external power supply mode has the function of flexible adjustment.
[0012] Preferably, the shore power-external power supply cable adopts 3×95 specifications and has a current carrying capacity of 200A.
[0013] Preferably, the circuit breaker for external power supply and the circuit breaker for shore power are 800A capacity circuit breakers.
[0014] Preferably, the cable protection circuit breaker is a 250A capacity circuit breaker.
[0015] Preferably, the ship-used external power supply-shore power integrated box further comprises an operating handle for operating the circuit breaker for external power supply and the circuit breaker for shore power, which are mechanically interlocked with each other.
[0016] Preferably, the ship-used external power supply-shore power integrated box also communicates with the power station management system through a cable, sends a shore power mode / external power supply mode signal, and receives instructions from the power station management system to perform remote electric closing and opening operations on the external power supply circuit breaker and the shore power circuit breaker without power interruption and load transfer. Thus, the present invention can also realize remote operation of switching between shore power mode and external power supply mode.
[0017] Preferably, the ship-used external power supply-shore power integrated box comprises a box body, the front of which is a panel; the external power supply circuit breaker and the shore power circuit breaker are arranged on the panel, and a plurality of cable protection circuit breakers are arranged inside the box body.
[0018] The beneficial effect of the present invention is that the integrated box of the present invention combines the external power supply box and the shore power box into an integrated design, which can have both the function of receiving shore power supply and the function of external power supply. In addition, the present invention can also solve the problem that the capacity of the existing ship external power supply / shore power box cannot be adjusted, and can have the function of adjusting the capacity of external power supply / shore power, which can match the shore power facilities of different docks and can be flexibly adjusted according to the actual working conditions and needs of the ship. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a front view of a marine external power supply and shore power integrated box according to an embodiment of the present invention.
[0020] Figure 2 yes Figure 1 A side view of a marine external power supply and shore power integrated box is shown.
[0021] Figure 3 yes Figure 1 The diagram shows some functional indications on the panel of the marine external power supply-shore power integrated box.
[0022] Figure 4 yes Figure 1 The electrical system diagram of the marine external power supply-shore power integrated box is shown.
[0023] Figure 5 yes Figure 4 The circuit schematic diagram of the ship external power supply-shore power integrated box shown in the figure shows the principle of the relevant components of a shore power-external power supply cable connected to the ship external power supply-shore power integrated box. DETAILED DESCRIPTION
[0024] The present invention is further described below in conjunction with the accompanying drawings and the following embodiments. It should be understood that the accompanying drawings and the following embodiments are only used to illustrate the present invention, but not to limit the present invention. Some non-essential improvements and adjustments made by those skilled in the art based on the above content of the present invention belong to the protection scope of the present invention. The specific process parameters and the like in the following examples are also only examples within a suitable range, that is, those skilled in the art can make a selection within a suitable range through the description of this article, and are not limited to the specific values exemplified below.
[0025] The present invention proposes a ship-used external power supply-shore power integrated box, which combines the external power supply box and the shore power box for an integrated design, and can have both the function of receiving shore power supply and the function of external power supply. Figure 1 , Figure 2 and Figure 3 The structure diagram of a ship external power supply-shore power integrated box (hereinafter referred to as an integrated box) according to an embodiment of the present invention is shown. Figure 1 This is the main view of the integrated box. Figure 2 yes Figure 1 A side view of the integrated box shown, Figure 3 It is a schematic diagram of some functional indications on the panel of the integrated box.
[0026] like Figure 1 and Figure 2 As shown, the integrated box of this embodiment is roughly rectangular, and has a box body 1 and a base 2 located below the box body 1, and a shock absorbing member 3 is provided between the box body 1 and the base 2, and the shock absorbing member 3 can be a shock absorbing rubber. The front of the box body 1 of the integrated box is a panel 4, and the back is a cover plate 5. The panel 4 of the box body 1 is also provided with a handle 8 that can be used to open or close the panel 4. Figure 1 As shown, the integrated box is provided with a plurality of function buttons and indicator devices, some of which can be directly arranged on the panel 4, and the other part can be arranged inside the box body 1, such as Figure 1 The buttons shown in the dotted line frame can be operated by opening the panel 4 through the operating handle 8 to operate the buttons arranged inside the box 1. The circuit breaker for external power supply and the circuit breaker for shore power are arranged on the panel, and multiple cable protection circuit breakers are arranged inside the box.
[0027] Specifically, in Figure 1 and Figure 3 As shown, the multiple function buttons provided on the integrated box mainly include a shore power ammeter switch s41, a shore power voltmeter switch s42, a synchronization selection switch s43, and a power supply mode switch s44 provided on the panel 4. In the present embodiment, the aforementioned switches may be knobs. The shore power ammeter switch s41 may perform three-phase selection at the R, S, and T positions; the shore power voltmeter switch s42 may perform three-phase selection at the RS, ST, and TR positions; the synchronization selection switch s43 may perform synchronization selection at the SCB1 to SCB4 positions; and the power supply mode switch s44 may select between shore power and external power supply modes.
[0028] In addition, Figure 1 As shown, in this embodiment, the function keys also include shore power / external power supply circuit breaker operating handles arranged on the panel 4 and mechanically interlocked with each other, namely, the external power supply circuit breaker operating handle 6 and the shore power circuit breaker operating handle 7. In addition, the function keys also include a switch that can be arranged in the panel door, namely Figure 1 The four cable protection circuit breaker closing / opening operation buttons QF1, QF2, QF3, and QF4 are shown in the dotted box.
[0029] Also like Figure 1 and Figure 3As shown, the above-mentioned multiple indicating devices are arranged on the panel 4, mainly including shore power current meter (A) M31, shore power voltage meter (V) M32, shore power synchronization meter (SYN) M33 and other instruments, which are respectively associated with the above-mentioned shore power current meter switch s41, shore power voltage meter switch s42, and synchronization selection switch s43. The above-mentioned indicating devices also include the following multiple indicator lights: U phase synchronization h71, V phase synchronization h72, W phase synchronization h73 (i.e. three synchronization indicator lights); No. 1 shore power has power h31, No. 2 shore power has power h41, No. 3 shore power has power h51, No. 4 shore power has power h61; No. 1 shore power supply h32, No. 2 shore power supply h42, No. 3 shore power supply h52, No. 4 shore power supply h62; No. 1 shore power positive sequence h33, No. 1 shore power reverse sequence h34 , No. 2 shore power positive sequence h43, No. 2 shore power reverse sequence h44, No. 3 shore power positive sequence h53, No. 3 shore power reverse sequence h54, No. 4 shore power positive sequence h63, No. 4 shore power reverse sequence h64; and No. 1 shore power closing switch sh31, No. 1 shore power opening switch sh32, No. 2 shore power closing switch sh41, No. 2 shore power opening switch sh42, No. 3 shore power closing switch sh51, No. 3 shore power opening switch sh52, No. 4 shore power closing switch sh61, No. 4 shore power opening switch sh62. The above-mentioned "No. 1 shore power", "No. 2 shore power", "No. 3 shore power", and "No. 4 shore power" correspond to the four-way shore power / external power supply lines adopted in this embodiment. Each indicator light indicates the corresponding working status of the integrated box.
[0030] The positions and numbers of the above-mentioned function buttons and indicator devices are only examples, but their arrangement on the box is not limited to this embodiment and can be changed as needed.
[0031] In the above-mentioned embodiment of the present invention, according to the cable weight, current carrying capacity and the carrying capacity of the cable reel, the integrated box of the ship shore power-external power supply cable can adopt the 3×95 specification, and the current carrying capacity of each cable is about 200A, and multiple groups of 3×95 shore power-external power supply cables can be connected. Specifically, in this embodiment, four groups of 3×95 shore power-external power supply cables can be used to meet the ability to adjust the shore power access / external power supply capacity within the range of 200A to 800A. It can solve the problems that the existing ship shore power box has a fixed capacity, cannot adjust the shore power capacity, cannot adapt to the differences in shore power facilities at different terminals, is not conducive to the improvement of the later mission functions of rescue ships, and the external power supply mode does not have the ability to flexibly adjust the external power supply capacity, and can no longer adapt to the multiple working conditions and multiple tasks of rescue ships. The present invention can also achieve a wider range of capacity adjustment capabilities and can expand capacity according to actual ship needs.
[0032] Figure 4 yes Figure 1 The electrical system diagram of the integrated box is shown in the figure. Figure 4As shown, the main components contained in the integrated box of this embodiment include two sets of circuit breakers for shore power / external power supply, four sets of cable protection circuit breakers, four groups of phase sequence conversion circuits, a synchronization meter and various contactors and relays.
[0033] Specifically, Figure 4 As shown, two sets of shore power / external power supply circuit breakers, namely, external power supply circuit breaker EP4-1 and shore power circuit breaker EP4-2 are respectively connected to the busbar, and each is connected to the two distribution panels on the main switchboard of the ship through a cable. The two circuit breakers EP4-1 and EP4-2 can be mechanically interlocked with each other and can be connected to the main switchboard through the above-mentioned Figure 1 The circuit breaker operating handle 6 for external power supply and the circuit breaker operating handle 7 for shore power supply are shown to be mechanically interlocked with each other. In this embodiment, the circuit breakers EP4-1 and EP4-2 can each be a 800A capacity circuit breaker, for example, a Schneider NS800N circuit breaker can be selected, but the present invention is not limited thereto.
[0034] Furthermore, if Figure 4 As shown, the circuit breaker EP4-1 for external power supply can be connected to a distribution panel on the aforementioned main distribution board through cable S11 (in this embodiment, it can be No. 1 380V distribution panel), and the circuit breaker EP4-2 for shore power can be connected to another distribution panel on the aforementioned main distribution board through cable S12 (in this embodiment, it can be No. 12 380V distribution panel). More specifically, in this embodiment, cable S11 is a line that receives the power supply of the main distribution board to realize the external power supply function, which can be composed of five groups of 3×95 cables with a rated current carrying capacity greater than 800 amperes; cable S12 is a line that is sent from the shore power to the main distribution board after the shore power is connected to the power supply to realize the shore power access function, which can also be composed of five groups of 3×95 cables. Preferably, a shore power voltage stabilizing device can also be connected to the cable S12 connecting the shore power circuit breaker EP4-2 and another distribution panel on the main distribution board. In addition, the two circuit breakers EP4-1 and EP4-2 mentioned above can also be equipped with an auxiliary electric operating mechanism to realize automatic closing operation during non-interruption of power supply and load transfer.
[0035] In addition, Figure 4 As shown, four sets of cable protection circuit breakers EP4.3, EP4.4, EP4.5, and EP4.6 are respectively connected to the busbar, and each is connected to a set of phase sequence switching circuits (each of which can be switched by two sets of contactors through phase sequence relays to determine the phase sequence) and then connected to the shore power-external power supply cables S13, S15, S17, and S19, which can receive shore power or external power supply. The above-mentioned circuit breakers EP4.3, EP4.4, EP4.5, and EP4.6 can each be connected to the above-mentioned Figure 1The four cable protection circuit breaker closing / opening operation buttons QF1, QF2, QF3, and QF4 shown are operated to select which one or more channels are used to receive shore power or external power supply. In this embodiment, the above-mentioned circuit breakers EP4.3, EP4.4, EP4.5, and EP4.6 can each be a 250A capacity circuit breaker. For example, a Schneider NSX250F circuit breaker can be selected, but the present invention is not limited to this. The above-mentioned shore power-external power supply cables S13, S15, S17, and S19 for receiving shore power or external power supply can adopt 3×95 specifications as mentioned above, and the current carrying capacity of each cable is about 200A. As described above, in this embodiment, the capacity of shore power access / external power supply can be adjusted in four gears within the range of 200A to 800A. The external power supply mode has the function of flexible adjustment, and can provide 200A capacity power supply to four ships at the same time, and can also provide a maximum capacity of 800A power supply to one ship.
[0036] Furthermore, Figure 4 As shown, in this embodiment, the shunt coil of each set of cable protection circuit breakers can also be extended through auxiliary contacts to the self-locking button ESB for use by shore power connection operators. Specifically, the above-mentioned cable protection circuit breakers EP4.3, EP4.4, EP4.5, and EP4.6 can be connected to their respective self-locking buttons ESB via lines S14, S16, S18, and S20, respectively. The self-locking button can be arranged on an extended control panel on the integrated box or next to the reel on the deck. The shore power connection operator can use the self-locking button to keep the shore power-external power supply cable of the corresponding road open to ensure that personnel do not perform live operations. Specifically, before connecting the shore power-external power supply cable, that is, before using the reel, the operator operates the self-locking button to keep the corresponding cable protection circuit breaker in the integrated box in the open state and lock it to prevent live operations; after confirming that the shore power-external power supply cable is correctly connected, release the self-locking button to allow the shore power-external power supply cable to supply power. The remaining shore power-external power supply cables that are not connected should keep the self-locking button locked to prevent live work. This solves the problem in the prior art that when operating the shore power connection operation, the operator cannot control the shore power box closing and opening operations, and live work may easily cause electric shock safety accidents if the operation is improper.
[0037] In addition, Figure 4 As shown, the integrated box of this embodiment can also communicate with the power station management system (i.e., PMS) through cable S21, send out shore power mode / external power supply mode signals, and at the same time accept PMS instructions to perform remote electric closing and opening of the shore power / external power supply circuit breaker under uninterrupted power supply and load transfer conditions.
[0038] The following combination Figures 1 to 4 The operation flow of the integrated box of this embodiment is further explained by a specific example, as follows:
[0039] 1. Shore power mode operation process description: First, adjust the power supply mode switch s44 to the shore power position, close the shore power circuit breaker EP4-2 and any cable protection circuit breaker. After the switch is closed and power is supplied, if another cable protection circuit breaker needs to be closed, it must be operated synchronously. The specific operations are as follows:
[0040] 1. The two shore power supplies U, V, W, each phase must be in the same phase;
[0041] 2. Select the synchronization selector switch s43 to the synchronization position, and observe the moving light spot of the shore power synchronization meter. It should not rotate, and the red and green lights at the 12 o'clock position of the shore power synchronization meter will light up at the same time;
[0042] 3. According to the light-off method, observe that the three synchronous indicator lights h71, h72, and h73 should all be off;
[0043] 4. After the conditions are met, you can manually close the second cable protection circuit breaker;
[0044] 5. After synchronization, the synchronization selection switch S43 is turned back to the closed position to prevent the synchronization meter from being damaged by long-term power-on heating;
[0045] 2. Description of the external power supply operation process: First, adjust the power supply mode switch s44 to the external power supply position, close the aforementioned external power supply circuit breaker EP4-1, and close the cable protection circuit breaker as needed, without the need for synchronous operation.
[0046] Figure 5 yes Figure 4 The circuit schematic diagram of the integrated box shown in the figure shows the principle of the relevant components of a shore power-external power supply cable connected to the integrated box. Specifically, Figure 5 The diagram shows a schematic diagram of a shore power supply cable S13 connected to the cable protection circuit breaker EP4.3. Figure 5 As shown, it may include a shore power mode circuit, a shore power mode indicator light circuit, a phase sequence detection circuit, a phase sequence switching circuit, a cable protection circuit breaker, a power supply mode circuit, a synchronization detection circuit, etc. The details are as follows.
[0047] Cable protection circuit breaker: As mentioned above, in this embodiment, the cable protection circuit breaker EP4.3 can be a Schneider NSX250F circuit breaker, which is connected between the busbar and the shore power-external power supply cable S13 to protect the load from overload and short circuit. At the same time, the self-contained shunt coil is connected to the self-locking button through the auxiliary contact for the shore power connection operator to use.
[0048] Power supply mode circuit: It is connected to the shore power-external power supply cable S13, and mainly switches between the shore power mode and the external power supply mode through components such as relay K14, relay KA2, delay relay KT11, and the switches K2~K4, K11, etc. connected to it, in conjunction with the power supply mode switch.
[0049] Shore power mode circuit: It is connected to the shore power-external power supply cable S13 and is only valid in shore power mode. It drives the shore power mode related electronic components (such as the switch K1 connected to it) to work through the relay KA1.
[0050] Shore power mode indicator light circuit: It is connected to the shore power mode circuit and is only effective in shore power mode. It is sent to the indicator lights h31, h33, and h34 after the voltage is stepped down by the control transformer TC, and accordingly drives the No. 1 shore power h31, No. 1 shore power positive sequence h33, and No. 1 shore power reverse sequence h34 indicator lights to work.
[0051] Phase sequence detection circuit: It is connected to the phase sequence switching circuit described later and is only valid in shore power mode. It detects the shore power phase sequence and the mother ship phase sequence respectively through two sets of phase sequence relays, and then drives the phase sequence switching circuit to perform phase sequence switching.
[0052] Phase sequence switching circuit: It is connected between the cable protection circuit breaker EP4.3 and the shore power-external power supply cable S13. It is only effective in shore power mode and performs phase sequence switching through two sets of contactors KM1 and KM2.
[0053] Synchronous detection circuit: only valid in shore power mode, connect the three phases of the four-way shore power / external power supply connection circuit to the synchronization meter and synchronization indicator h73 through the corresponding switches K12~K17. When the synchronization selection switch is in the synchronization position, the red and green lights at the 12 o'clock position of the synchronization meter are lit at the same time, and the three synchronization indicators should all go out, that is, the power supply has been synchronized, and the second cable protection circuit breaker can be manually closed.
[0054] Each fuse FU1 to F16 in the above circuit can protect each circuit. And the structure of each circuit is not limited to Figure 5 The examples shown are sufficient as long as they can achieve the aforementioned functions.
[0055] The integrated box of this embodiment can have four sets of shore power-external power supply cable access circuits, and the electrical principles of each circuit are the same as Figure 5 The same, but share the same set of synchronization detection circuit and synchronization table. Through the synchronization detection circuit, one to four cables can be used for shore power or external power supply mode operation according to actual working conditions, and the capacity can be switched in four gears of 200A, 400A, 600A, and 800A.
[0056] In summary, the integrated box of this embodiment can realize a new type of ship external power supply-shore power integrated box, and has been used in actual ships with good results. The integrated box of this embodiment can have the following three main functions:
[0057] 1. It has the functions of both shore power and external power supply.
[0058] 2. The integrated box of this embodiment has the function of adjusting the shore power capacity. The marine shore power can be adjusted in a large capacity range of 200A to 800A, and has the ability to transfer loads without power outages. It also has the function of external power supply, and can provide up to four external power supply capabilities, which can simultaneously meet the 200A capacity power supply capacity of four ships or the maximum 800A capacity power supply capacity of one ship. Specifically, as described above, the external power supply / shore power integrated box can realize the capacity adjustment function through a combination of electronic components including an 800A capacity circuit breaker and a 250A capacity circuit breaker, and can be adjusted in four gears between 200A and 800A.
[0059] 3. The integrated box of this embodiment has the function of preventing live operation, and can reduce the risk of electric shock through the self-locking button. Specifically, the shunt coil of each single-channel cable protection circuit breaker can be extended through the auxiliary contact as a self-locking button for shore power connection operators to use. The ability to prevent live operation is achieved.
[0060] In other words, the integrated box of this embodiment solves the problem that the existing ship shore power box can only perform shore power connection / external power supply operations according to the designed fixed capacity, and cannot adjust the capacity according to different needs. The current ship shore power box has no anti-electric shock protection function, and the shore power cable connection operators are at risk of live operation.
[0061] Without departing from the purpose of the basic characteristics of the present invention, the present invention can be embodied in various forms. Therefore, the embodiments of the present invention are used for illustration rather than limitation. Since the scope of the present invention is limited by the claims rather than the specification, all changes within the scope defined by the claims or within the equivalent scope of the scope defined by the claims should be understood to be included in the claims.
Claims
1. A marine external power supply-shore power integrated box, characterized in that: It includes: A circuit breaker for external power supply and a circuit breaker for shore power supply, which are respectively connected to the busbar and mechanically interlocked with each other, the circuit breaker for external power supply is connected to a distribution panel of the main distribution board of the ship to receive the power of the main distribution board for external power supply, and the circuit breaker for shore power supply is connected to another distribution panel of the main distribution board to send the power connected to the shore power to the main distribution board; A plurality of cable protection circuit breakers are respectively connected to the busbars, and each of the cable protection circuit breakers is connected to the shore power-external power supply cable after a phase sequence switching circuit to receive shore power or supply power to the external power supply.
2. The marine external power supply-shore power integrated box according to claim 1 is characterized in that: The shunt coil of each cable protection circuit breaker is extended and connected to the self-locking button through an auxiliary contact.
3. The marine external power supply-shore power integrated box according to claim 1 is characterized in that: Each of the phase sequence switching circuits switches the circuit after judging the phase sequence through a phase sequence relay using two groups of contactors.
4. The marine external power supply-shore power integrated box according to claim 1, characterized in that: The plurality of cable protection circuit breakers includes four cable protection circuit breakers.
5. The marine external power supply-shore power integrated box according to claim 1, characterized in that: The shore power-external power supply cable adopts 3×95 specifications and has a current carrying capacity of 200A.
6. The marine external power supply and shore power integrated box according to claim 1, characterized in that: The circuit breaker for external power supply and the circuit breaker for shore power are 800A capacity circuit breakers.
7. The marine external power supply and shore power integrated box according to claim 1, characterized in that: The cable protection circuit breaker is a 250A capacity circuit breaker.
8. The marine external power supply and shore power integrated box according to claim 1, characterized in that: The marine external power supply-shore power integrated box also includes an operating handle for operating the circuit breaker for external power supply and the circuit breaker for shore power, which are mechanically interlocked with each other.
9. The marine external power supply-shore power integrated box according to claim 1, characterized in that: The marine external power supply-shore power integrated box also communicates with the power station management system through a cable, sends out shore power mode or external power supply mode signals, and accepts instructions from the power station management system to remotely and electrically close and open the external power supply circuit breaker and the shore power circuit breaker without interrupting power supply and load transfer.
10. The marine external power supply and shore power integrated box according to claim 1, characterized in that: The ship-used external power supply and shore power integrated box comprises a box body, the front of which is a panel; the external power supply circuit breaker and the shore power circuit breaker are arranged on the panel, and a plurality of cable protection circuit breakers are arranged inside the box body.