Parallel cabinet with safe wiring

Abstract

The invention discloses a safe wiring parallel cabinet, and relates to the technical field of mobile energy storage power systems, the safe wiring parallel cabinet comprises a cabinet body, an input wiring module, an output wiring module and a circuit breaker control module, the bottom of the cabinet body is provided with a big-end-down base, the top is provided with a slope top with a high front and a low back, and the side surface and the front surface are provided with small cabinet doors with wind hooks; the whole cabinet body is provided with a small cabinet door with a wind hook, the protection grade is high, rainwater and dust are isolated, the output interface, the first input interface and the second input interface are separately arranged on different side surfaces of the cabinet body, the marks are clear, the types are different, misplug is prevented, and independent loops of the first input copper bar, the second input copper bar and the first output copper bar are adopted. The bolts are fixed to form a low-impedance access, contact risks are reduced, a circuit breaker electric operation power supply is provided with voltage stabilization and protection, an indicating lamp and an auxiliary contact are connected in series and isolated to resist interference, a switching-on and switching-off button has a self-locking function, output circuit breaker time sequence switching-on is achieved, impact is reduced, and load electricity utilization safety is guaranteed in an all-around mode.

Description

Technical Field

[0001] The present invention relates to the technical field of mobile energy storage power systems, and in particular to a parallel cabinet with safe wiring. Currently, many power-using sites require continuous power supply. Based on this requirement, the traditional solution is to connect two power sources to the STS (static transfer switch) system, and then use the STS system to power the load.

[0002] Currently, in fixed power consumption locations with stringent power supply continuity requirements (such as film and television shooting sites, outdoor equipment, and emergency power supply), STS (static transfer switch) systems are commonly used to implement dual power supply switching. The basic principle is to connect two power sources to the STS system and switch the power paths using semiconductor devices (such as thyristors). However, this solution has the following significant drawbacks: 1. When using an STS (static transfer switch) system to implement dual power switching, the circuit topology includes multiple filtering, buffering, and protection modules, resulting in an exponential increase in wiring nodes (e.g., each power supply requires the connection of ≥10 components such as filter capacitors, surge protectors, and thyristors). The wiring density is high and the routing is complex. It is easy for human errors (such as incorrect wire connection and loose terminals) to cause phase short circuits or ground faults. As a result, if a fault occurs during power switching, it is difficult to troubleshoot, making it impossible to locate the specific fault point in a timely manner. Furthermore, if a semiconductor device is damaged, the entire board must be replaced, and all wiring parameters (such as phase sequence and impedance matching) must be recalibrated after replacement. Single maintenance takes a long time, and secondary faults are easily generated during the wiring process, causing harm to operators. At the same time, the maintenance cycle is long and the cost is high.

[0003] 2. Limited by the current carrying capacity of semiconductor devices (usually ≤400A), high-power scenarios require multiple STSs to be connected in parallel, further increasing costs and space.

[0004] 3. STS has conduction loss, and the system energy efficiency is usually less than 92%. Under high current conditions, the heat dissipation demand is high, and forced air cooling or water cooling systems are required, which increases energy consumption and noise.

[0005] 4. STS relies on high-specification semiconductor devices and complex control circuits, and the equipment cost is high, so it is necessary to propose a parallel cabinet with safe wiring. Summary of the Invention

[0006] The purpose of the present invention is to provide a parallel cabinet with safe wiring to solve the problems proposed in the above-mentioned background technology, such as the circuit topology includes multiple stages of filtering, buffering and protection modules, which makes troubleshooting difficult. When the semiconductor device is damaged, the entire board needs to be replaced, which makes wiring difficult and easily causes harm to the operators. At the same time, the maintenance cycle is long and the cost is high; due to the current carrying capacity of the semiconductor device (usually ≤400A), high-power scenarios require multiple STSs to be connected in parallel, further increasing the cost and space occupied; STS has conduction loss, and the system energy efficiency is usually less than 92%; under high current conditions, the heat dissipation demand is high, and forced air cooling or water cooling system is required, which increases energy consumption and noise; STS relies on high-specification semiconductor devices and complex control circuits, and the equipment cost is high, so it is necessary to propose a parallel cabinet with safe wiring.

[0007] To achieve the above object, the present invention provides the following technical solutions: a parallel cabinet with safe wiring, comprising a cabinet body, an input wiring module, an output wiring module and a circuit breaker control module; The bottom of the cabinet is provided with a base that is smaller at the top and larger at the bottom, the top is provided with a sloped top that is higher in the front and lower in the back, and the sides and the front are provided with small cabinet doors with wind hooks; The input wiring module includes a first input interface and a second input interface that are symmetrically arranged, wherein the side ends of the first input interface and the second input interface are respectively connected to an independent first input copper busbar and a second input copper busbar, and the side ends of the first input copper busbar and the second input copper busbar are respectively connected to a first input circuit breaker and a second input circuit breaker; The output wiring module includes five output interfaces, and the side ends of the five output interfaces are electrically connected to four output circuit breakers, wherein the five output interfaces are composed of four common interfaces and one spare interface, and the five output interfaces are connected in parallel with four output circuit breakers; The circuit breaker control module includes an opening and closing button, which is used to control the opening and closing of the first input circuit breaker, the second input circuit breaker and the output circuit breaker. When the first input circuit breaker and the second input circuit breaker are closed synchronously, seamless switching of dual power supplies is achieved through parallel connection of copper bars.

[0008] Preferably, the first input interface forms an independent incoming line loop with the first input copper busbar and the first input circuit breaker, and the second input interface forms a mirror-symmetrical incoming line loop with the second input copper busbar and the second input circuit breaker. The side ends of the two incoming line loops are connected to the first output copper busbar, and the two incoming line loops are connected in parallel through the first output copper busbar and then connected to four output circuit breakers. The four output circuit breakers are respectively electrically connected to five output wiring modules.

[0009] Preferably, the output wiring module consists of four output circuit breakers, which adopt timed closing control and are closed in sequence in a preset order through the opening and closing buttons to reduce the load startup impact current. The spare output interface and the fourth output interface share a circuit breaker, and one spare interface is different from the conventional output interface and supports two load access methods.

[0010] Preferably, the internal wiring of the cabinet is respectively connected to the first input copper bar, the second input copper bar and the first output copper bar, and the first input copper bar, the second input copper bar and the first output copper bar are all fixed to the cabinet insulation bracket by bolts to form a low-impedance conductive path.

[0011] Preferably, the small cabinet door covers the first input interface, the second input interface and the output interface, and the opening angle of the small cabinet door is 90°. The wind hook it carries is used to ensure that the small cabinet door is fixed when opened, and forms a protection with the cabinet body when closed to prevent rain and dust from invading the wiring area.

[0012] Preferably, the auxiliary contacts of the first input circuit breaker and the second input circuit breaker communicate with the power supply system to provide real-time feedback on the opening and closing status. The auxiliary contacts of the output circuit breaker are connected in series with an indicator light, which displays the on / off status of the output circuit breaker by lighting up or going out.

[0013] Preferably, a sloped roof is installed on the top of the cabinet body, so that rainwater on the top is guided to the rear of the cabinet body through a guide groove opened on the surface of the sloped top to avoid dripping into the front operating area.

[0014] Preferably, the first input circuit breaker and the second input circuit breaker both adopt electric operating mechanisms and support dual modes of opening and closing buttons and remote control. During the switching process, the two power supplies run in parallel through the first input copper busbar and the second input copper busbar to achieve zero power outage switching.

[0015] Preferably, the first input interface, the second input interface and the output interface all adopt an anti-misplugging design, and the first input interface and the second input interface are respectively marked with "1-way power supply" and "2-way power supply", and the output interface is respectively marked with "normal load" and "standby load" to avoid wiring errors.

[0016] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, by using the physical isolation of a small cabinet door with a wind hook in conjunction with the output interface, the first input interface and the second input interface, rain and dust can be effectively blocked from invading the wiring area, and the interface markings are clear (such as "1-way power supply" and "conventional load") and the types are differentiated (the spare interface and the conventional interface plug structure are different). Combined with the anti-reverse connection aviation plug, the wiring error rate of the traditional STS system is reduced, and the first input copper busbar, the second input copper busbar and the first output copper busbar with large cross-sectional area are fixed to the insulating bracket by bolts, so the conductive loss is low, which is reduced compared with the traditional multi-stage circuit, and the copper is realized by synchronously closing the first input circuit breaker and the second input circuit breaker. The parallel power supply, in which two power supplies run in parallel during the switching process, can completely eliminate the delayed power-off gap of the traditional STS system and meet the stringent power supply continuity requirements of sensitive loads such as medical equipment and film and television shooting. The four output circuit breakers are closed in sequence according to a preset order (with an interval of 5-10 seconds), reducing the load startup impact current from the rated value and extending the life of electrical components. The spare interface has a built-in surge protector to absorb transient overvoltages and protect sensitive equipment. At the same time, the circuit breakers in the entire device are installed on the guide rail, which can quickly complete the replacement of a single component. Compared with the traditional STS system, the efficiency of replacing the entire board is improved, so that the overall load power safety can be fully guaranteed. Figure 1 This is a three-view structural diagram of a main body in a parallel cabinet with safe wiring according to the present invention, wherein (a) is a left view of the main body, (b) is a front view of the main body, and (c) is a right view of the main body; Figure 2 A schematic diagram of the internal structure of a cabinet in a parallel cabinet with safe wiring according to the present invention; Figure 3 A schematic diagram of a line connection structure in a parallel cabinet with safe wiring according to the present invention; Figure 4 The present invention provides a wiring safe parallel cabinet Figure 3 A schematic diagram of the enlarged circuit connection structure at point A; Figure 5 The present invention provides a wiring safe parallel cabinet Figure 3 Schematic diagram of some structural line connections.

[0017] In the figure: 101, base; 102, cabinet; 103, opening and closing buttons; 104, indicator light; 105, output interface; 106, small cabinet door; 107, sloped top; 108, second input interface; 109, first input interface; 121, first input copper busbar; 122, second input copper busbar; 123, first input circuit breaker; 124, second input circuit breaker; 125, first output copper busbar; 126, output circuit breaker; 211, first power input indicator light; 212, second power input indicator light. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0019] When switching between dual power supplies in parallel cabinets, due to the 1. The multi-level circuit topology results in numerous wiring nodes, which can easily lead to phase misconnection or short circuits due to manual operation. The dense layout of semiconductor devices also increases the risk of fault propagation. 2. Open wiring ports are susceptible to erosion by rain and dust, and may cause leakage or poor contact, especially in outdoor environments; 3. Relying on semiconductor devices to switch power paths, there are millisecond-level power-off gaps, which cannot meet the needs of sensitive loads such as medical equipment and film and television shooting; 4. Damaged semiconductor devices require replacement of the entire board, which has a long repair cycle and high costs, and cannot meet the needs of rapid repair in emergency scenarios.

[0020] The present invention is completed to solve the problems of the prior art. Through physical structure optimization and electrical design innovation, it solves the core problems of traditional systems in wiring safety, switching continuity and maintenance efficiency.

[0021] Reference Figure 1 and Figure 2As shown: A parallel cabinet with safe wiring, including a cabinet body 102, an input wiring module, an output wiring module and a circuit breaker control module; the cabinet body 102 is provided with a base 101 with a small top and a large bottom, a sloping top 107 with a high front and a low back on the top, and small cabinet doors 106 with wind hooks on the sides and the front; the input wiring module includes a first input interface 109 and a second input interface 108 arranged symmetrically, the side ends of the first input interface 109 and the second input interface 108 are respectively connected to independent first input copper bars 121 and second input copper bars 122, and the side ends of the first input copper bars 121 and the second input copper bars 122 are respectively connected to first input circuit breakers 123 and the second input circuit breaker 124; the output wiring module includes a five-way output interface 105, and the side end of the five-way output interface 105 is electrically connected to four output circuit breakers 126, wherein the five-way output interface 105 consists of four common interfaces and one spare interface, and the five-way output interface 105 is connected in parallel with four output circuit breakers 126; the circuit breaker control module includes an opening and closing button 103, which is used to control the on and off of the first input circuit breaker 123, the second input circuit breaker 124 and the output circuit breaker 126, and when the first input circuit breaker 123 and the second input circuit breaker 124 are closed synchronously, seamless switching of dual power supplies is achieved through parallel copper busbars.

[0022] The first input interface 109, the first input copper busbar 121, and the first input circuit breaker 123 form an independent incoming line loop. The second input interface 108, the second input copper busbar 122, and the second input circuit breaker 124 form a mirror-symmetrical incoming line loop. The side ends of the two incoming line loops are connected to the first output copper busbar 125, and the two incoming line loops are connected in parallel through the first output copper busbar 125 and then connected to four output circuit breakers 126. The four output circuit breakers 126 are respectively electrically connected to five output wiring modules.

[0023] The output wiring module consists of four output circuit breakers 126. The four output circuit breakers 126 adopt timed closing control and are closed in sequence in a preset order through the opening and closing buttons 103 to reduce the load startup impact current. The spare output interface and the fourth output interface 105 share a circuit breaker, and the spare interface is different from the regular output interface 105, supporting two load access methods.

[0024] Specifically: the cabinet base 101 is connected to the cabinet body 102 by welding, the cabinet body 102 is connected to the sloped top 107 by welding, the cabinet body 102 is connected to the small cabinet door 106 by hinges and locks, the cabinet body 102 is connected to the first input interface 109 by bolts, the cabinet body 102 is connected to the second input interface 108 by bolts, the cabinet body 102 is connected to the five-way output interface 105 by bolts, the cabinet body 102 is connected to the opening and closing button 103 by bolts, the cabinet body 102 is connected to the indicator light 104 by bolts, the cabinet body 102 is connected to the first power input indicator light 211 by bolts, the cabinet body 102 is connected to the second power input indicator light 212 by bolts, the cabinet base 101 is designed to be small at the top and large at the bottom, the sloped top 107 is designed to be high in the front and low in the back, and the small cabinet There are three doors 106, which are distributed on the front and left and right sides of the cabinet 102. A wind hook is also provided inside the small cabinet door 106. The five-way output interface 105 includes four regular output interfaces 105 and one spare output interface, and the regular output interface 105 and the spare output interface have different load connection methods. There are a total of 6 pairs of opening and closing buttons 103, including the opening and closing buttons 103 connected to the first input circuit breaker 123, the opening and closing buttons 103 connected to the second input circuit breaker 124, and the opening and closing buttons 103 connected to the four output circuit breakers 126. The spare output interface in the five-way output interface 105 and the four-way output interface 105 share four output circuit breakers 126. The output indicator light 104 includes four to display the opening and closing status of the output circuit breaker 126.

[0025] The second input circuit breaker 124 is connected to the cabinet 102 by bolts, the first input circuit breaker 123 is connected to the first input copper busbar 121 by bolts, the first input copper busbar 121 is connected to the first input interface 109 by bolts, the second input circuit breaker 124 is connected to the cabinet 102 by bolts, the second input circuit breaker 124 is connected to the second input copper busbar 122 by bolts, the second input copper busbar 122 is connected to the second input interface 108 by bolts, the first input circuit breaker 123 and the second input circuit breaker 124 are connected to the first output copper busbar 125 by bolts, the first output copper busbar 125 is connected to the four output circuit breakers 126 by bolts, and the four output circuit breakers 126 are electrically connected to the five output interfaces 105 respectively by cables.

[0026] according to Figure 1-Figure 5 As shown, the internal wiring of the cabinet 102 is respectively connected to the first input copper bar 121, the second input copper bar 122 and the first output copper bar 125, and the first input copper bar 121, the second input copper bar 122 and the first output copper bar 125 are all fixed to the insulating bracket of the cabinet 102 by bolts to form a low-impedance conductive path.

[0027] The small cabinet door 106 covers the first input interface 109, the second input interface 108 and the output interface 105. The opening angle of the small cabinet door 106 is 90°. The wind hook it carries is used to ensure that the small cabinet door 106 is fixed when opened, and forms a protection with the cabinet body 102 when closed to prevent rain and dust from invading the wiring area.

[0028] The auxiliary contacts of the first input circuit breaker 123 and the second input circuit breaker 124 communicate with the power supply system and provide real-time feedback on the opening and closing status. The auxiliary contacts of the output circuit breaker 126 are connected in series with an indicator light 104, which displays the on / off status of the output circuit breaker 126 by lighting up or off. The side ends of the first input interface 109 and the second input interface 108 are respectively connected to the first power input indicator light 211 and the second power input indicator light 212.

[0029] The top of cabinet 102 is equipped with a sloped roof 107, which directs rainwater from the top through diversion grooves on the surface of the sloped roof 107 to the rear of cabinet 102, preventing it from dripping onto the front operating area. Both the first input circuit breaker 123 and the second input circuit breaker 124 utilize electric operating mechanisms and support dual modes of opening and closing buttons 103 and remote control. During switching, the two power sources operate in parallel through the first input copper busbar 121 and the second input copper busbar 122, achieving zero-power switching.

[0030] The first input interface 109, the second input interface 108 and the output interface 105 all adopt an anti-misplugging design, and the first input interface 109 and the second input interface 108 are respectively marked with "1-way power supply" and "2-way power supply", and the output interface 105 is respectively marked with "normal load" and "standby load" to avoid wiring errors.

[0031] More specifically, a first power input indicator light 211 is provided between the first input copper bar 121 and the first input circuit breaker 123, and the first power input indicator light 211 includes three-phase indicators A\B\C. When the first input interface 109 has power input, the first power input indicator light 211 will light up. When the input power has a phase loss, the corresponding indicator light of the phase loss will not light up. The electrical power supply of the first input circuit breaker 123 comes from the external first power supply system. When the first power supply has input, the opening and closing button 103 of the first input circuit breaker 123 begins to take effect. When the opening and closing button 103 is pressed, the first input circuit breaker 123 is closed, and points 11 and 14 of the first input circuit breaker 123 are connected (such as Figure 4 and Figure 5As shown, the external first power supply system shows that the first input circuit breaker 123 is closed. When the first input circuit breaker 123 is in the closed state, pressing the opening and closing button 103 will disconnect the first input circuit breaker 123. At this time, points 11 and 14 of the first input circuit breaker 123 are disconnected. The external first power supply system shows that the first input circuit breaker 123 is separated. The second input interface 108 and the second input circuit breaker 124 are electrically connected in the same way. The output ports of the first input circuit breaker 123 and the second input circuit breaker 124 are connected in parallel and then output to the input ports of the four output circuit breakers 126. The electrical power supply of the four output circuit breakers 126 comes from points A1 and N1 (as shown in FIG. 1 ), which are the parallel connection points of the first input circuit breaker 123 and the second input circuit breaker 124. Figure 5 As shown in FIG5 ), when either the first input circuit breaker 123 or the second input circuit breaker 124 is closed, points A1 and N1 will supply power to the four output circuit breakers 126. At this time, the five-way output interfaces 105 are electrically connected to the four output circuit breakers 126 respectively, wherein the spare output interface and the four-way output interfaces 105 are connected in parallel at the output end of the four-way output circuit breaker 126. The spare output interface is connected differently from the other four-way output interfaces 105, so that the cabinet can provide two output interfaces.

[0032] The power supply for the four output circuit breakers 126 comes from points A1 and N1 ( Figure 5 In the figure, the corresponding output indicator light 104 and the auxiliary contacts corresponding to the first input circuit breaker 123, the second input circuit breaker 124 and the output circuit breaker 126 are connected in series between points A1 and N1 (i.e., the common bus after the dual power supplies are connected in parallel), ensuring that no matter which input power is closed, the electric power supply can continue to supply power. When both input circuit breakers are disconnected, there is no voltage at points A1 and N1, and the output circuit breaker 126 cannot be operated, avoiding accidental pressing of the output button when there is no input power. When there is AC 220V voltage at A1 and N1, the four outputs are disconnected. The opening and closing button 103 of the switch 126 comes into effect, and a voltage stabilizing chip (such as LM7824) is connected in series between points A1 and N1 and the electric power input terminal to ensure that the voltage input to the circuit breaker coil is stable at 220V±10% to avoid malfunction of the circuit breaker due to power fluctuations. A small circuit breaker or a self-resetting fuse is installed in the electric power circuit to prevent the short circuit of the indicator light 104 from affecting the circuit breaker operation circuit. When the opening and closing button 103 is pressed, the circuit breaker corresponding to the circuit breaker is closed, and the corresponding points 11 and 14 of the circuit breaker are connected ( Figure 4 As shown in ), the indicator light 104 connected to the corresponding output circuit breaker 126 is lit. When the output circuit breaker 126 is in the closed state, the output circuit breaker (126) corresponding to the opening and closing button 103 is disconnected, and the 11 and 14 points of the corresponding output circuit breaker 126 are disconnected ( Figure 4As shown in ), the indicator light 104 of the corresponding output circuit breaker 126 is off. A photoelectric coupler (such as model 4N25) can be installed between the auxiliary contact and the indicator light 104 to isolate the strong current circuit from the weak current circuit of the indicator light 104, so as to avoid arc interference during the opening and closing of the circuit breaker causing the indicator light to light up incorrectly. The signal line of the indicator light 104 adopts a twisted pair and a double-layer shielding layer, and maintains a distance of ≥50mm from the high-current copper busbar to reduce the influence of electromagnetic induction. The opening and closing button 103 in the overall device adopts a mushroom-head button with self-locking function, which needs to be pressed and rotated. Only then can the operation be triggered to avoid accidental touch causing the output circuit breaker 126 to be opened and closed. When the first input circuit breaker 123 and the second input circuit breaker 124 are both disconnected, the closing operation of the output circuit breaker 126 is locked to prevent the load from backfeeding through the output interface 105, thereby ensuring maintenance safety. At the same time, each output circuit breaker 126 is equipped with two indicator lights 104 (main light + auxiliary light), which are respectively connected in series to different auxiliary contacts (such as 11-14 o'clock and 13-14 o'clock). If one of the indicator lights 104 is damaged, the other can still work normally, thereby improving the reliability of status feedback.

[0033] The wiring diagram in the present invention is common knowledge in the art, and its working principle is a well-known technology. The model is selected according to the actual use, so the control method and wiring arrangement are not explained in detail.

[0034] Among them, it is further necessary to explain: 1. The base 101 of the parallel cabinet is designed to be small at the top and large at the bottom, which enhances the overall stability of the parallel cabinet.

[0035] 2. The first input interface 109, the second input interface 108 and the five-way output interface 105 of the parallel cabinet are respectively arranged on the left and right sides and the front of the cabinet body 102, and the first input interface 109, the second input interface 108 and the five-way output interface 105 are respectively provided with a small cabinet door 106 with a wind hook that can be flipped up. This design isolates the input and output interfaces and makes the layout more reasonable. At the same time, the small cabinet door 106 with a wind hook that can be flipped up not only facilitates the wiring operation but also maximizes the protection against rain.

[0036] 3. The top of the cabinet is designed with a sloped roof 107 that is high in the front and low in the back, which can effectively guide rainwater to the back of the cabinet 102 and prevent rainwater from the top from falling to the front operating position.

[0037] 4. Connect the cabinets by closing the first input circuit breaker 123 (QFA1) (as Figure 4 (in) connect one input power source to the system for power supply. When the power of one input power source is about to be exhausted, close the second input circuit breaker 124 (QFA2) (as shown in FIG. Figure 3), and then disconnect the first input circuit breaker 123 (it can be manually disconnected or automatically disconnected by the power system when the power is exhausted), remove the one input power. Since the circuit of the one input power is exactly the same as the circuit of the two input power, there is no master-slave distinction. The same operation can be performed when the two input power is exhausted. A new power supply can be connected to the first input interface 109 for battery life. Under the above operation, it can be ensured that the power supply system will not be cut off during the switching process, and the power supply system can be guaranteed to never be cut off when the power is replaced cyclically.

[0038] 5. The cabinet system is connected internally through circuit breakers and copper bars, with basically no power loss, single components, simple system, high reliability and easy maintenance.

[0039] 6. The two second input circuit breakers 124 and the four output circuit breakers 126 in the parallel cabinet can all be equipped with electric operating mechanisms. The opening and closing of each circuit breaker can be controlled by buttons, which is very simple to operate.

[0040] 7. Three-phase indicator lights are connected in parallel between the first input interface 109, the second input interface 108, the first input circuit breaker 123 and the second input circuit breaker 124 of the parallel cabinet, which can accurately and clearly indicate the input status of the two power supplies.

[0041] 8. The auxiliary contacts of the first input circuit breaker 123 and the second input circuit breaker 124 in the parallel cabinet are connected to the corresponding power supply system, so that the corresponding power supply system can respectively display the opening and closing status of the first input circuit breaker 123 and the second input circuit breaker 124.

[0042] 9. The feedback contacts of the four output circuit breakers 126 of the parallel cabinet are all connected in series with indicator lights 104, which can accurately and clearly indicate the real-time status of each discharge circuit breaker.

[0043] 10. The parallel cabinet is provided with four output circuit breakers 126. When discharging, the four output circuit breakers 126 are closed in sequence to reduce the instantaneous impact current value of the load startup and protect the system electrical components.

[0044] 11. The parallel cabinet is provided with four common output interfaces 105 and one spare output interface 105, which can adapt to two different load interfaces.

[0045] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A parallel cabinet with safe wiring, characterized by: It includes a cabinet (102), an input wiring module, an output wiring module and a circuit breaker control module; The cabinet body (102) is provided with a base (101) with a small top and a large bottom at the bottom, a sloping top (107) with a high front and a low back at the top, and small cabinet doors (106) with wind hooks on the sides and the front. The input wiring module comprises a first input interface (109) and a second input interface (108) which are symmetrically arranged, wherein the side ends of the first input interface (109) and the second input interface (108) are respectively connected to an independent first input copper busbar (121) and a second input copper busbar (122), and the side ends of the first input copper busbar (121) and the second input copper busbar (122) are respectively connected to a first input circuit breaker (123) and a second input circuit breaker (124); The output wiring module includes five output interfaces (105), and the side ends of the five output interfaces (105) are electrically connected to four output circuit breakers (126), wherein the five output interfaces (105) are composed of four common interfaces and one spare interface, and the five output interfaces (105) are connected in parallel with the four output circuit breakers (126); The circuit breaker control module comprises an opening and closing button (103), wherein the opening and closing button (103) is used to control the opening and closing of the first input circuit breaker (123), the second input circuit breaker (124) and the output circuit breaker (126); and when the first input circuit breaker (123) and the second input circuit breaker (124) are synchronously closed, seamless switching of dual power supplies is achieved through parallel connection of copper bars.

2. The parallel cabinet with safe wiring according to claim 1, characterized in that: The first input interface (109), the first input copper busbar (121), and the first input circuit breaker (123) form an independent incoming line loop, and the second input interface (108), the second input copper busbar (122), and the second input circuit breaker (124) form a mirror-symmetrical incoming line loop. The side ends of the two incoming line loops are connected to the first output copper busbar (125), and the two incoming line loops are connected in parallel through the first output copper busbar (125) and then connected to four output circuit breakers (126). The four output circuit breakers (126) are respectively electrically connected to five output wiring modules.

3. The parallel cabinet with safe wiring according to claim 1, characterized in that: The output wiring module is composed of four output circuit breakers (126). The four output circuit breakers (126) are controlled by time sequence closing and are closed in sequence according to a preset sequence through the opening and closing buttons (103), thereby reducing the load starting impact current. One spare output interface and the fourth output interface (105) share a circuit breaker, and the spare interface is different from the regular output interface (105), supporting two load access modes.

4. The parallel cabinet with safe wiring according to claim 1, characterized in that: The internal wiring of the cabinet (102) is respectively connected to a first input copper busbar (121), a second input copper busbar (122), and a first output copper busbar (125), and the first input copper busbar (121), the second input copper busbar (122), and the first output copper busbar (125) are all fixed to an insulating bracket of the cabinet (102) by bolts, forming a low-impedance conductive path.

5. The parallel cabinet with safe wiring according to claim 1, characterized in that: The small cabinet door (106) covers the first input interface (109), the second input interface (108) and the output interface (105). The opening angle of the small cabinet door (106) is 90 degrees. The wind hook provided therewith is used to ensure that the small cabinet door (106) is fixed when opened, and forms a protection with the cabinet body (102) when closed, so as to prevent rain and dust from invading the wiring area.

6. The parallel cabinet with safe wiring according to claim 1, characterized in that: The auxiliary contacts of the first input circuit breaker (123) and the second input circuit breaker (124) communicate with the power supply system to provide real-time feedback on the opening and closing status. The auxiliary contacts of the output circuit breaker (126) are connected in series with an indicator light (104), and the indicator light (104) displays the on / off status of the output circuit breaker (126) by lighting up or extinguishing.

7. The parallel cabinet with safe wiring according to claim 1, characterized in that: The top of the cabinet (102) is provided with a sloped roof (107) for guiding rainwater from the top to the rear of the cabinet (102) through a guide groove provided on the surface of the sloped roof (107) to avoid dripping onto the front operating area.

8. The parallel cabinet with safe wiring according to claim 1, characterized in that: The first input circuit breaker (123) and the second input circuit breaker (124) both adopt an electric operating mechanism and support dual modes of opening and closing buttons (103) and remote control. During the switching process, the two power supplies are connected in parallel through the first input copper busbar (121) and the second input copper busbar (122), realizing zero-power-off switching.

9. The parallel cabinet with safe wiring according to claim 1, characterized in that: The first input interface (109), the second input interface (108) and the output interface (105) all adopt an anti-misplugging design, and the first input interface (109) and the second input interface (108) are respectively marked with "1-way power supply" and "2-way power supply", and the output interface (105) is respectively marked with "normal load" and "standby load" to avoid wiring errors.

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