ENERGY DISTRIBUTION SYSTEM

Abstract

A power distribution system (100) includes a frame (120), at least one busbar, and switching modules (140). The busbar is arranged on the frame (120) and configured to be connectable to at least one input line (50). Each switching module (140) includes a switching module main body (142) and a control unit (144), and the switching module main body (142) is removably arranged on the frame (120) and has an input interface (142a) and an output interface (142b). The input interface (142a) is coupled to the control unit (144) and connected to the busbar. The output interface (142b) is coupled to the control unit (144) and is configured to be connectable to at least one output line (60). The control unit (144) is arranged in the switch module main body (142) and includes a relay (1441) and a control board (1442) which are coupled to each other.The power distribution system (100) further includes a plurality of connection terminals (170) and a plurality of circuit breakers, wherein the connection terminals (170) are arranged on the frame (120) and correspond to the switching modules (140), each of the connection terminals (170) is plugged into the output interface (142b) of the corresponding switching module (140), the circuit breakers are detachably arranged on the frame (120) and connected to the connection terminals (170), and the output interface (142b) is coupled to the at least one output line through the corresponding connection terminal (170) and the corresponding circuit breaker.

Description

BACKGROUNDTechnical field

[0001] The disclosure relates to an energy system and in particular to an energy distribution system. Description of the state of the art

[0002] A conventional electrical panel is not equipped with intelligent control functions, so a smart control panel must be installed to provide measurement and control functions. Such an arrangement requires the installation of multiple smart control panels due to the large number of loops. It is not suitable for outdoor installation or in locations with limited space, and the wiring is complicated. Currently, some integrated electrical panels include an electrical panel and a smart control panel, eliminating the need to install an additional smart control panel. However, an integrated electrical panel has many parts, and its assembly is therefore complicated.In addition, the number of loops cannot be changed, and multiple sets of molds must be developed to manufacture products with different numbers of loops, resulting in low production efficiency and high manufacturing costs. Furthermore, the multiple switching and measurement components of a conventional electrical switchboard or existing integrated electrical switchboard are not individually modular but share a single control board. Therefore, if a single channel fails, the entire system must be disassembled for maintenance, resulting in low maintenance efficiency and a significant increase in power downtime for the user.

[0003] US 2021 / 0 066 013 A1 discloses a semiconductor power switch including: a power semiconductor device; an air gap isolation unit connected in series with the power semiconductor device; a detection and control circuit that switches off the power semiconductor device upon detection of a short circuit or an overload of unacceptably long duration; and a microcontroller unit that triggers the air gap isolation unit to form an air gap and galvanically isolate a connected load after the detection and control circuit switches off the power semiconductor device.

[0004] EP 3 246 995 A1 discloses a busbar system for connecting devices with at least one touch-protected base plate module for receiving elongated and electrically conductive busbar modules, each having a plurality of evenly spaced contact openings of a contact opening grid, wherein electrical connection contacts of a device to be connected can be inserted into the contact openings of the contact opening grid of the electrically conductive busbar modules to establish an electrical and mechanical connection. SUMMARY

[0005] The disclosure provides a power distribution system that enables improved maintenance efficiency.

[0006] The present invention provides a power distribution system including a frame, at least one bus bar, and a plurality of switching modules. The bus bar is arranged on the frame and is configured to be coupled to at least one input line. Each of the switching modules includes a switching module main body and a control unit, and the switching module main body is detachably arranged on the frame and has an input interface and an output interface. The input interface is coupled to the control unit and connected to the bus bar. The output interface is coupled to the control unit and is configured to be coupled to at least one output line. The control unit is arranged in the switching module main body and includes a relay and a control board that are connected to each other.

[0007] In one embodiment of the disclosure, each of the switching modules further includes a current sensor and a voltage measuring unit, and the current sensor and the voltage measuring unit are arranged in the switching module main body and coupled to the control board.

[0008] According to the present invention, the power distribution system further includes a plurality of connection terminals and a plurality of circuit breakers. The connection terminals are arranged on the frame and correspond to the switching modules. Each of the connection terminals is plugged into the output interface of the corresponding switching module. The circuit breakers are removably arranged on the frame and connected to the connection terminals. The output interface is connected to the output line through the corresponding connection terminal and the corresponding circuit breaker.

[0009] In one embodiment of the disclosure, the frame includes a backplate and a base body that are connected to each other. The base body has a supporting surface and a bottom surface that oppose each other. A receiving space is provided between the backplate and the bottom surface. The switching modules are arranged in the receiving space, and the circuit breakers are arranged on the supporting surface.

[0010] In one embodiment of the disclosure, the switch module main body has two locking holes. The base body has a plurality of openings corresponding to the locking holes of the switch module main bodies. Each of the switch modules further includes two locking elements that pass through the corresponding two openings to lock with the two locking holes of the corresponding switch module main body and abut against the busbar and the corresponding connection terminal.

[0011] In one embodiment of the disclosure, each of the circuit breakers is adapted to be separated from the body to expose some of the openings.

[0012] In one embodiment of the disclosure, the backplate includes a plurality of sub-backplates detachably connected in series.

[0013] In one embodiment of the disclosure, the base body includes a plurality of sub-base bodies that are detachably connected one after the other.

[0014] In one embodiment of the disclosure, the back plate has a plurality of first slide rails, and the main body has a plurality of second slide rails. The switch module main body has a plurality of slide grooves and is slidably disposed between a first slide rail and a second slide rail through the slide grooves.

[0015] In one embodiment of the disclosure, the switch module main body has a hook that engages the base body.

[0016] In one embodiment of the disclosure, the base body has a plurality of openings corresponding to the switching modules. The hook is adapted to be pushed through the corresponding opening to be released from the base body.

[0017] In one embodiment of the disclosure, the receiving space includes two adjacent sub-receiving spaces. Some switching modules are arranged sequentially in one sub-receiving space, and other switching modules are arranged sequentially in the other sub-receiving space.

[0018] In one embodiment of the disclosure, the busbar has a plurality of first busbar terminals and a plurality of second busbar terminals. The first busbar terminals are inserted into the switching modules in one sub-accommodating space in a first direction, and the second busbar terminals are inserted into the switching modules in the other sub-accommodating space in a second direction opposite to the first direction.

[0019] In one embodiment of the disclosure, the power distribution system further includes a housing. In a width direction of the power distribution system, a size of the housing is W, a size of each switching module is L, an installation gap between each switching module and the housing is a, an installation width of the busbar is b, and W = 4*L+2*a+b < 362 mm.

[0020] In one embodiment of the disclosure, each of the connection terminals has a first end portion and a second end portion opposite each other. The first end portion is connected to the corresponding circuit breaker. The second end portion is connected to the corresponding output interface. Each of the connection terminals is inserted into the base body such that the base body is located between the first end portion and the second end portion. The second end portion is located in the receiving space. The busbar is arranged on the back plate and located between the back plate and the second end portion.

[0021] In one embodiment of the disclosure, the frame further includes a plurality of support elements supported between the backplate and the base body. Each of the support elements is located between two adjacent switch modules.

[0022] In one embodiment of the disclosure, each of the support elements is an I-shaped structure.

[0023] In one embodiment of the disclosure, the busbar includes a first phase busbar and a second phase busbar. The frame further includes at least one insulating column supported between the backplate and the base body and blocked between the first phase busbar and the second phase busbar.

[0024] In one embodiment of the disclosure, each of the switching modules is adapted to be removed and separated independently of the other switching modules, the circuit breakers, and the frame.

[0025] In one embodiment of the disclosure, the switching modules are coupled together via a daisy chain topology.

[0026] In summary, the power distribution system of the disclosure includes a plurality of independent switching modules. Each of these switching modules is equipped with a control board, rather than sharing a single board. Accordingly, in the event of a failure of a single channel of the power distribution system, only the corresponding switching module can be removed for maintenance without having to remove all switching modules as a whole, thereby improving maintenance efficiency.

[0027] In order to make the above more understandable, several embodiments are described in detail below with drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the disclosure and, together with the description, serve to explain the principles of the disclosure. Fig. 1 is a front view of a power distribution system according to an embodiment of the disclosure. Fig. 2 is an exploded view of the power distribution system of Fig. 1. Fig. 3 is an exploded view of some elements of the power distribution system of Fig. 2. Fig. Figure 4 is a schematic diagram of the power distribution system of Fig. 1, which is connected to an input line and an output line. Fig. 5 is a partial bottom view of the power distribution system of Fig. 1. Fig. 6 is a substructure of the energy distribution system of Fig. 3. Fig. 7 is a substructure of the energy distribution system of Fig. 3. Fig. Figure 8 is an exploded view of some elements of the power distribution system of Fig. 7. Fig. 9 shows the internal structure of a switching module from Fig. 5. Fig. 10 and Fig. 11 are three-dimensional views of some elements of the power distribution system of Fig. 7 from different perspectives. Fig. 12 is a front view of the switching module of Fig. 6. Fig. 13 is a front view of a partial structure of the power distribution system of Fig. 6. Fig. 14 is a side view of a partial structure of the power distribution system of Fig. 6. Fig. 15 is a cross-sectional view of the power distribution system of Fig. 13 along line II. Fig. 16 is a front view of a partial structure of the power distribution system of Fig. 15. Fig. 17 is a three-dimensional partial view of some elements of the power distribution system of Fig. 6. Fig. 18 is a three-dimensional partial view of some elements of the power distribution system of Fig. 17. Fig. 19 is a three-dimensional partial view of some elements of the power distribution system of Fig. 6. Fig. 20 is a front view of the power distribution system of Fig. 19. Fig. 21 is a partial side view of some elements of the power distribution system of Fig. 6. Fig. 22 shows a partial structure of a basic body made of Fig. 3. Fig. 23 is an enlarged partial view of the main body of Fig. 22. Fig. 24A and Fig. 24B illustrate an assembly method for a sub-base body made of Fig. 22. Fig. 25 shows a partial structure of a back plate made of Fig. 3. Fig. 26 shows how two switching modules from Fig. 5 be moved away from two sub-recording rooms. DESCRIPTION OF THE EMBODIMENTS

[0029] Fig. 1 is a front view of a power distribution system according to an embodiment of the disclosure. Fig. 2 is an exploded view of the power distribution system of Fig. 1. Fig. 3 is an exploded view of some elements of the power distribution system of Fig. 2. With reference to Fig. 1 to Fig. 3, a power distribution system 100 of this embodiment includes a housing 110, a frame 120, a cover 130, a plurality of switching modules 140, and a plurality of circuit breakers 150. The frame 120 is disposed within the housing 110 and configured to support the switching modules 140 and the circuit breakers 150. The cover 130 is pivotally connected to the housing 110 and configured to cover the housing 110 to cover the frame 120, the switching modules 140, the circuit breakers 150, and other elements within the housing 110.

[0030] Fig. Figure 4 is a schematic diagram of the power distribution system of Fig. 1, which is connected to an input line and an output line. With regard to Fig. 4, an input line 50 (e.g., an alternating current (AC) line) is used to input power to the switching module 140, and the power is output from the switching module 140 through the power switch 150 to an output line 60 (e.g., an AC line).

[0031] Fig. 5 is a partial bottom view of the power distribution system of Fig. 1, Fig. 6 is a substructure of the energy distribution system of Fig. 3, and Fig. 7 is a substructure of the energy distribution system of Fig. 3. To clarify the drawings, a part of the switching module 140 and a part of the circuit breaker 150 are shown in Fig. 5 to Fig. 7 shown in disassembled condition. Fig. Figure 8 is an exploded view of some elements of the power distribution system of Fig. 7. With reference to Fig. 5 to Fig. 8, each switching module 140 of this embodiment includes a switching module main body 142 that is detachably mounted on the frame 120 and has an input interface 142a and an output interface 142b. The power distribution system 100 further includes at least one bus bar (shown as a first phase bus bar 160A and a second phase bus bar 160B) and a plurality of connection terminals 170. The first phase bus bar 160A and the second phase bus bar 160B are mounted on the frame 120 and configured to be connected to the Fig. 2. The input interfaces 142a of some switching module main bodies 142 are connected to the first phase busbar 160A, and the input interfaces 142a of other switching module main bodies 142 are connected to the second phase busbar 160B.

[0032] The connection terminals 170 are arranged on the frame 120 and correspond to the switching modules 140. Each connection terminal 170 is plugged into the output interface 142b of the switching module main body 142 of the corresponding switching module 140. The circuit breakers 150 are detachably arranged on the frame 120 and connected to the connection terminals 170. The output interface 142b of each switching module main body 142 is connected via the corresponding connection terminal 170 and the corresponding circuit breaker 150 to the Fig. 2. Furthermore, these switching modules 140 are coupled to one another, for example, via connection ports 1401 in a daisy-chain topology, so that signals and power can be transferred between them.

[0033] Fig. 9 shows the internal structure of a switching module from Fig. 5. With regard to Fig. 9, each switching module 140 of this embodiment further includes a control unit 144 disposed in the switching module main body. The input interface 142a and the output interface 142b of the switching module main body 142 are coupled to the control unit 144. The control unit 144 includes a relay 1441 and a control board 1442 that are coupled to each other. Furthermore, each switching module 140 includes a current sensor 146 and a voltage measurement unit 148. The current sensor 146 and the voltage measurement unit 148 are disposed in the switching module main body 142 and coupled to the control board 1442. More specifically, the power enters the switching module 140 from the input interface 142a, reaches the relay 1441, reaches the current sensor 146 via the control board 1442, and then reaches the output interface 142b via the control board 1442. The relay 1441 is configured to switch the power transmission of the switching module 140.The current sensor 146 is configured to detect the current. The voltage measuring unit 148 is configured to measure the voltage. The control board 1442 is configured to control at least part of the switching module 140, including the various functions mentioned above. The detailed functions and operating principles of the control board 1442, the relay 1441, the current sensor 146, and the voltage measuring unit 148 are well-known technologies in the field of electrical switchboards and will not be explained in detail here.

[0034] Compared with a conventional electrical switchboard, at least one feature of the power distribution system 100 of this embodiment is that the power distribution system 100 includes a plurality of switching modules 140 that are independent of each other as described above. These switching modules 140 are each provided with a control board 1442 integrated with the voltage measurement unit 148, rather than sharing a single board. Therefore, each switching module 140 can be detached and separated independently of other switching modules 140, the circuit breakers 150, and the frame 120. Accordingly, if a single channel of the power distribution system 100 fails, only the corresponding switching module 140 can be removed for maintenance without having to remove all the switching modules 140 as a whole, thereby improving maintenance efficiency.

[0035] Fig. 10 and Fig. 11 are three-dimensional views of some elements of the power distribution system of Fig. 7 from different perspectives. With reference to Fig. 7, Fig. 10 and Fig. 11, the frame 120 in this embodiment includes a back plate 122 and a base body 124 that are connected to each other. The base body 124 has a support surface 124a and a bottom surface 124b that oppose each other. A receiving space S is provided between the back plate 122 and the bottom surface 124b of the base body 124. The switching modules 140 are arranged in the receiving space S, and the circuit breakers 150 are arranged on the support surface 124a of the base body 124. Furthermore, each of the connection terminals 170 has a first end portion 170a and a second end portion 170b that oppose each other. The first end portion 170a is connected to the corresponding circuit breaker 150, and the second end portion 170b is connected to the output interface 142b of the corresponding switching module 140.Each of the connecting terminals 170 is inserted into the base body 124 such that the base body 124 is located between the first end portion 170a and the second end portion 170b. The second end portion 170b is located in the receiving space S. The first phase busbar 160A and the second phase busbar 160B are arranged on the back plate 122 and are located between the back plate 122 and the second end portion 170b.

[0036] With this arrangement, the frame 120, including its back plate 122 and the base body 124, forms a two-layer open installation structure. Furthermore, the at least one busbar (the first phase busbar 160A and the second phase busbar 160B) and the first end portion 170a and the second end portion 170b of the connection terminal 170 form a three-layer external terminal. Therefore, the circuit breaker 150 and the switching module 140 can be easily installed on an upper layer and a lower layer of the frame 120, respectively, and can be easily electrically connected to the connection terminal 170 via the at least one busbar (the first phase busbar 160A and the second phase busbar 160B).

[0037] Furthermore, the accommodation space S of this embodiment includes two adjacent sub-accommodation spaces S1 and S2. Some switching modules 140 are arranged one after another in the sub-accommodation space S1, and other switching modules 140 are arranged one after another in the sub-accommodation space S2. The first phase busbar 160A has a plurality of first busbar terminals 162A and a plurality of second busbar terminals 164A, as shown in Fig. 11. The first busbar terminals 162A are plugged into some switching modules 140 in the sub-accommodating space S1 in a first direction D1. The second busbar terminals 164A are plugged into some switching modules 140 in the sub-accommodating space S2 in a second direction D2 opposite to the first direction D1. Similarly, the second phase busbar 160B has a plurality of first busbar terminals 162B and a plurality of second busbar terminals 164B, as shown in Fig. 11. The first busbar terminals 162B are inserted into some switching modules 140 in the sub-accommodating space S1 in the first direction D1. The second busbar terminals 164B are inserted into some switching modules 140 in the sub-accommodating space S2 in the second direction D2. With this arrangement, the at least one busbar (the first phase busbar 160A and the second phase busbar 160B) and the switching module 140 are compactly arranged in the accommodation space S, so that an arrangement space is saved and a volume of the entire device is reduced.

[0038] Fig. 12 is a front view of the switching module of Fig. 6. Fig. 13 is a front view of a partial structure of the power distribution system of Fig. 6. With reference to Fig. 6, Fig. 7, Fig. 12 and Fig. 13, each switch module main body 142 of this embodiment has two locking holes H1. The base body 124 has a plurality of openings H2 corresponding to the locking holes H1 of the switch module main bodies 142. Each of the circuit breakers 150 is adapted to be separated from the base body 124 to expose some of the openings H2. Each of the switch modules 140 further includes two locking elements 141 (shown in Fig. 12 and Fig. 13) passing through the corresponding two openings H2 to be locked with the two locking holes H1 of the corresponding switch module main body 142 and abut against the terminals (illustrated as the first bus bar terminals 162A of the first phase bus bar 160A) of the corresponding bus bar and the second end portion 170b of the corresponding connection terminal 170.

[0039] Fig. 14 is a side view of a partial structure of the power distribution system of Fig. 6. With reference to Fig. 8 and Fig. 14, the back plate 122 of this embodiment has a plurality of first slide rails 1221, and the base body 124 has a plurality of second slide rails 1241. The switch module main body 142 has a plurality of slide grooves 1421 and is slidably disposed between a first slide rail 1221 and a second slide rail 1241 through the slide grooves 1421. Accordingly, each switch module main body 142 can be easily installed on the frame 120 by being guided by the first slide rails 1221 and the second slide rails 1241.

[0040] Fig. 15 is a cross-sectional view of the power distribution system of Fig. 13 along line II. Fig. 16 is a front view of a partial structure of the power distribution system of Fig. 15. With regard to Fig. 15 and Fig. 16, each switch module main body 142 has a hook 1422. The base body 124 has a plurality of openings 1242, and these openings 1242 correspond to these switch modules 140. The hooks 1422 engage with the openings 1242 of the base body 124, so that the switch module main body 142 is stably installed on the frame 120. The hook 1422 is adapted to be pushed through the corresponding opening 1242 to be separated from the base body 124, so that the switch module main body 142 can be removed from the frame 120.

[0041] Fig. 17 is a three-dimensional partial view of some elements of the power distribution system of Fig. 6. Fig. 18 is a three-dimensional partial view of some elements of the power distribution system of Fig. 17. With reference to Fig. 17 and Fig. 18, the frame 120 of this embodiment further includes a plurality of support members 126 supported between the back plate 122 and the base body 124. As shown in Fig. As shown in Figure 18, each support element 126 is a thin, I-shaped structure. Each support element 126 can be arranged between two adjacent switching modules 140 without excessively encumbering the arrangement spaces of the switching modules 140.

[0042] Fig. 19 is a three-dimensional partial view of some elements of the power distribution system of Fig. 6. Fig. 20 is a front view of the power distribution system of Fig. 19. Fig. 21 is a partial side view of some elements of the power distribution system of Fig. 6. With reference to Fig. 19 to Fig. 21, the frame 120 of this embodiment further includes a plurality of insulating columns 128 supported between the back plate 122 and the base body 124 and blocked between the terminals (the first busbar terminals 162A and the second busbar terminals 162B) of the first phase busbar 160A and the terminals (the first busbar terminals 164A and the second busbar terminals 164B) of the second phase busbar 160B. As described above, the insulating columns 128 have the functions of both structural support and electrical insulation of the various phases, so that the structural design of the frame 120 can be simplified and the arrangement space can be saved.

[0043] Fig. 22 shows a partial structure of the basic body of Fig. 3. Fig. 23 is an enlarged partial view of the main body of Fig. 22. Fig. 24A and Fig. 24B show an assembly method for a sub-base body of Fig. 22. With reference to Fig. 3 and Fig. 22 to Fig. 24B, the main body 124 of this embodiment includes a plurality of sub-main bodies 124S that are detachably connected one after the other. More specifically, a pin P1 (in Fig. 23) of each sub-base body 124S into a pin hole P2 (in Fig. 23) of another sub-base body 124S. Furthermore, a hook K1 of each sub-base body 124S can be buckled or snapped into a buckle groove K2 of another sub-base body 124S, as shown in Fig. 24A to Fig. 24B, so that the connection of the two sub-base bodies 124S can be quickly established without additional fastening means. Fig. 25 shows a partial structure of a back plate made of Fig. 3. Similarly, the backplate 122 of this embodiment includes a plurality of sub-backplates 122S that are detachably connected one after another. The connection method is the same as or similar to that of the sub-base 124S, so it will not be described further here. With this arrangement, a user can change the number of sub-bases 124S and sub-backplates 122S according to the number of loops required in the power distribution system, thus flexibly expanding the number of loops and easily meeting customer requirements.

[0044] Fig. 26 shows how two switching modules from Fig. 5 be moved away from two sub-recording rooms. With reference to Fig.26, in a width direction of the power distribution system 100 parallel to the first direction D1 and the second direction D2, a size of the enclosure 110W, a size of each switching module 140L, an installation gap between each switching module 140 and the enclosure 110a, an installation width of the at least one busbar b, and W = 4*L+2*a+b < 362mm (the common width of European and American distribution panels). In this way, the switching module 140 can have sufficient space for expansion while reducing the width of the enclosure 110 as much as possible.

[0045] In view of the above, the power distribution system of the disclosure includes a plurality of independent switching modules. Each of these switching modules is equipped with a control board, rather than sharing a single board. Accordingly, if a single channel of the power distribution system fails, only the corresponding switching module can be removed for maintenance without having to remove all switching modules as a whole, thereby improving maintenance efficiency.

[0046] It will be apparent to those skilled in the art that various modifications and variations may be made to the disclosed embodiments without departing from the scope or spirit of the disclosure. In view of the foregoing, the disclosure is intended to cover modifications and variations provided they come within the scope of the following claims and their equivalents. List of reference symbols 50 input line 60 output line 100 Energy distribution system 110 housings 120 frames 122 back plate 1221 first slide rail 122S lower back plate 124 basic bodies 1241 second slide rail 1242 Opening 124a wing 124b Floor area 124S lower base body 126 Support element 128 Insulation column 130 Cover 140 switching module 1401 connection port 141 Locking element 142 Switch module main body 1421 sliding groove 1422 hooks 142a Input interface 142b Output interface 144 Control unit 1441 Relay 1442 control board 146 Current sensor 148 Voltmeter 150 circuit breakers 160A first phase busbar 160B second phase busbar 162A, 162B first busbar connection 164A, 164B second busbar connection 170 connection port 170a first end section 170b second end section D1 first direction D2 second direction H1 locking hole H2 opening K1 hook K2 buckle groove P1 pin P2 pin hole S recording room S1, S2 sub-recording room

Claims

[1] Energy distribution system (100), comprising: a frame (120); at least one busbar disposed on the frame (120) and configured to be coupled to at least one input line (50); a plurality of switching modules (140), each of the switching modules (140) comprising a switching module main body (142) and a control unit (144), the switching module main body (142) being detachably mounted on the frame (120) and comprising an input interface (142a) and an output interface (142b), the input interface (142a) being coupled to the control unit (144) and connected to the at least one busbar, the output interface (142b) being coupled to the control unit (144) and configured to be coupled to at least one output line (60), and the control unit (144) being arranged in the switching module main body (142) and comprising a relay (1441) and a control board (1442) coupled to one another; and a plurality of connection terminals (170) and a plurality of circuit breakers (150), wherein the connection terminals (170) are arranged on the frame (120) and correspond to the switching modules (140), each of the connection terminals (170) is plugged into the output interface (142b) of the corresponding switching module (140), the circuit breakers (150) are detachably arranged on the frame (120) and connected to the connection terminals (170), and the output interface (142b) is coupled to the at least one output line (60) through the corresponding connection terminal (170) and the corresponding circuit breaker (150). [2] The power distribution system (100) according to claim 1, wherein each of the switching modules (140) further comprises a current sensor (146) and a voltage measuring unit (148), and the current sensor (146) and the voltage measuring unit (148) are arranged in the switching module main body (142) and coupled to the control board (1442). [3] The power distribution system (100) according to claim 1, wherein the frame (120) comprises a back plate (122) and a base body (124) which are connected to each other, the base body (124) has a support surface (124a) and a bottom surface (124b) which are opposite to each other, a receiving space (S) is provided between the back plate (122) and the bottom surface (124b), the switching modules (140) are arranged in the receiving space (S), and the circuit breakers (150) are arranged on the support surface (124a). [4] The power distribution system (100) according to claim 3, wherein the switch module main body (142) has two locking holes (H1), the base body (124) has a plurality of openings (H2) corresponding to the locking holes (H1) of the switch module main bodies (142), and each of the switch modules (140) further comprises two locking members (141) passing through the corresponding two openings (H2) to be locked with the two locking holes (H1) of the corresponding switch module main body (142) and to abut against the at least one bus bar and the corresponding connection terminal (170). [5] The power distribution system (100) of claim 4, wherein each of the circuit breakers (150) is adapted to be separated from the base body (124) to expose some of the openings (H2). [6] The power distribution system (100) of claim 3, wherein the backplate (122) comprises a plurality of sub-backplates (122S) detachably connected one after the other. [7] The power distribution system (100) according to claim 3, wherein the base body (124) comprises a plurality of sub-base bodies (124S) detachably connected one after the other. [8] The power distribution system (100) according to claim 3, wherein the back plate (122) has a plurality of first slide rails (1221), the base body (124) has a plurality of second slide rails (1241), and the switch module main body (142) has a plurality of slide grooves (1421) and is slidably arranged between a first slide rail (1221) and a second slide rail (1241) through the slide grooves (1421). [9] The power distribution system (100) according to claim 3, wherein the switch module main body (142) has a hook (1422) engaging with the base body (124). [10] The power distribution system (100) of claim 9, wherein the base body (124) has a plurality of openings (1242) corresponding to the switching modules (140), and the hook (1422) is adapted to be pushed through the corresponding opening (1242) to be released from the base body (124). [11] The power distribution system (100) according to claim 3, wherein the accommodation space (S) comprises two adjacent sub-accommodation spaces (S1, S2), wherein some switching modules (140) are arranged one after the other in one sub-accommodation space (S1, S2) and other switching modules (140) are arranged one after the other in the other sub-accommodation space (S1, S2). [12] The power distribution system (100) according to claim 11, wherein the at least one busbar has a plurality of first busbar terminals (162A, 162B) and a plurality of second busbar terminals (164A, 164B), the first busbar terminals (162A, 162B) are inserted in a first direction (D1) into the switching modules (140) in one sub-accommodating space (S1, S2), and the second busbar terminals (164A, 164B) are inserted in a second direction (D2) opposite to the first direction (D1) into the switching modules (140) in the other sub-accommodating space (S1, S2). [13] The power distribution system (100) according to claim 11, further comprising a housing (110), wherein in a width direction of the power distribution system (100), a size of the housing (110) is W, a size of each switching module (140) is L, an installation gap between each switching module (140) and the housing (110) is a, an installation width of the at least one bus bar is b, and W = 4*L+2*a+b < 362mm. [14] The power distribution system (100) according to claim 3, wherein each of the connection terminals (170) has a first end portion (170a) and a second end portion (170b) opposite each other, the first end portion (170a) is connected to the corresponding circuit breaker (150), the second end portion (170b) is connected to the corresponding output interface (142b), each of the connection terminals (170) is inserted into the base body (124) such that the base body (124) is located between the first end portion (170a) and the second end portion (170b), the second end portion (170b) is located in the receiving space (S), and the at least one busbar is arranged on the back plate (122) and is located between the back plate (122) and the second end portion (170b). [15] The power distribution system (100) of claim 3, wherein the frame (120) further comprises a plurality of support members (126) supported between the back plate (122) and the base body (124), and each of the support members (126) is located between two adjacent switch modules (140). [16] The power distribution system (100) of claim 15, wherein each of the support members (126) is an I-shaped structure. [17] The power distribution system (100) of claim 3, wherein the at least one busbar comprises a first phase busbar (160A) and a second phase busbar (160B), wherein the frame (120) further comprises at least one insulating column (128) supported between the back plate (122) and the base body (124) and blocked between the first phase busbar (160A) and the second phase busbar (160B). [18] The power distribution system (100) of claim 1, wherein each of the switching modules (140) is adapted to be removed and separated independently of the other switching modules (140), the circuit breakers (150) and the frame (120). [19] The power distribution system (100) of claim 1, wherein the switching modules (140) are coupled together via a daisy chain topology.

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