Integrated three-phase motor protector

Abstract

The utility model belongs to the technical field of protectors, and discloses an integrated three-phase motor protector, which comprises an electronic component board, a shell and an upper cover. A plurality of groups of protection systems are arranged on the electronic component board at intervals along the length direction of the electronic component board, each group of protection system comprises three current transformers, and each current transformer is provided with a threading hole; the electronic component board is installed in the shell, first hole sets corresponding to the protection systems one to one are formed in a bottom plate of the shell in the length direction of the shell, each first hole set comprises three first core penetrating wire holes, and the three first core penetrating wire holes are arranged opposite to one ends of the three wire penetrating holes respectively; the upper cover is connected with the shell in a buckled mode, second hole sets corresponding to the protection systems in a one-to-one mode are formed in the upper cover in the length direction of the upper cover, each second hole set comprises three second core penetrating wire holes, and the three second core penetrating wire holes are arranged opposite to the other ends of the three wire penetrating holes respectively. The integrated three-phase motor protector is small in size and high in working reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of protectors, in particular to an integrated three-phase motor protector. Background Art

[0002] A motor protector is a device that gives an alarm or provides protection when the motor has problems such as overload, phase loss, short circuit, overvoltage, undervoltage, leakage, three-phase imbalance, overheating, etc.

[0003] Generally, only three phases of a motor protector are used as a protector. However, in actual applications, multiple protectors are often needed at the same time. When multiple protectors are arranged side by side, they occupy more space in the control cabinet. In addition, each protector must be connected to the controller group. Many wires need to be connected, and the installation process is cumbersome. Wiring errors or unreliable connections are prone to occur, which affects the reliability of the protector.

[0004] Therefore, it is urgent to propose an integrated three-phase motor protector to solve the above problems. Utility Model Content

[0005] The utility model provides an integrated three-phase motor protector, which can replace a plurality of protectors arranged side by side, improves the space utilization of the control cabinet, has simple installation process and high working reliability.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Integrated three-phase motor protector, including:

[0008] An electronic component board, wherein a plurality of protection systems are arranged at intervals on the electronic component board along the length direction of the electronic component board, each protection system comprises three current transformers, and each current transformer is provided with a threading hole;

[0009] A housing, the electronic component board is installed in the housing, and along the length direction of the housing, a first hole group corresponding to the protection system is provided on the bottom plate of the housing, the first hole group includes three first core wire holes, and the three first core wire holes are respectively arranged opposite to one end of the three threading holes;

[0010] The upper cover is snap-fitted with the shell, and a second hole group corresponding to the protection system is provided on the upper cover along the length direction of the upper cover, and the second hole group includes three second wire threading holes, and the three second wire threading holes are respectively arranged opposite to the other ends of the three threading holes.

[0011] Optionally, along the length direction of the shell, a first guide column group corresponding to the protection system is provided on the bottom plate of the shell, the first guide column group includes three first guide columns, the three first guide columns are respectively abutted against one side of the three current transformers, and the first guide columns are provided with the first core wire holes;

[0012] Along the length direction of the upper cover, a second guide column group corresponding to the protection system is provided on the upper cover, the second guide column group includes three second guide columns, the three second guide columns are respectively abutted against the other side of the three current transformers, and the second guide columns are provided with the second core wire holes.

[0013] Optionally, a plurality of cover limiting ribs are provided on both side plates opposite to each other in the width direction of the shell, the plurality of cover limiting ribs are arranged at intervals along the length direction of the side plates and extend along the width direction of the side plates, a limiting arm extends from one end of the cover limiting rib close to the upper cover, and a limiting groove is formed between the limiting arm and the side plates;

[0014] The upper cover is provided with flanges at two opposite ends in the width direction, the flanges are inserted into the corresponding limiting grooves, and the bottom surface of the upper cover abuts against the limiting arms.

[0015] Optionally, the flange is provided with limiting notches corresponding one to one with the cover limiting ribs, and the limiting notches and the limiting grooves are engaged with each other.

[0016] Optionally, cover guide ribs are provided on the two opposite side plates in the length direction of the shell, the cover guide ribs extend along the installation direction of the upper cover, and guide grooves are provided at the two opposite ends in the length direction of the upper cover, and the guide grooves are plugged into the cover guide ribs.

[0017] Optionally, a first mounting groove extending along the length direction of the shell is provided on the bottom plate of the shell, and the first end of the electronic component board in the width direction is plugged into the first mounting groove; and / or,

[0018] The housing is provided with second mounting grooves on two opposite side plates along the length direction, and the two opposite ends of the electronic component board along the length direction are respectively plugged into the corresponding second mounting grooves; and / or,

[0019] The upper cover is provided with a third mounting groove extending along the length direction of the upper cover, and the second end of the electronic component board in the width direction is plugged into the third mounting groove.

[0020] Optionally, a first buffer fixing groove is provided on the bottom plate of the housing, a first buffer is provided in the first buffer fixing groove, and a first end of the electronic component board in a width direction abuts against the first buffer; and / or,

[0021] The upper cover is provided with a second buffer member fixing groove, a second buffer member is provided in the second buffer member fixing groove, and the second end of the electronic component board in the width direction abuts against the second buffer member.

[0022] Optionally, a first dividing groove is provided on the outer wall of the bottom plate of the shell between two adjacent first hole groups; and / or a second dividing groove is provided on the top surface of the upper cover between two adjacent second hole groups.

[0023] Optionally, the shell is provided with a first heat dissipation hole; and / or the upper cover is provided with a second heat dissipation hole.

[0024] Optionally, a plug-in terminal hole is provided on the upper cover, and the plug-in terminal hole is arranged opposite to the plug-in terminal seat on the electronic component board;

[0025] And / or, a dial opening is provided on the upper cover, and the dial opening is arranged opposite to the dial switch on the electronic component board;

[0026] And / or, an indicator light hole is provided on the upper cover, and the indicator light hole is arranged opposite to the indicator light on the electronic component board.

[0027] Optionally, the shell is provided with a connecting ear, the connecting ear is provided with a connecting hole, and the integrated three-phase motor protector is fixed in the control cabinet through the connecting hole.

[0028] Optionally, a plurality of reinforcing ribs are provided on at least one side plate of the shell.

[0029] Optionally, the shell is provided with a first connecting column, the upper cover is provided with a second connecting column, the second connecting column is plugged into the first connecting column, and a connecting piece passes through the second connecting column and is connected to the first connecting column.

[0030] Beneficial effects of the utility model:

[0031] The utility model provides an integrated three-phase motor protector, comprising an electronic component board, a shell and an upper cover, wherein the electronic component board is arranged in the shell, and the upper cover is buckled and connected to the shell. Each group of protection systems on the electronic component board is equivalent to an independent protector, and by arranging multiple groups of protection systems on the electronic component board, the functions of multiple groups of protectors are integrated on the electronic component board, thereby enabling the integrated three-phase motor protector to replace multiple groups of protectors arranged side by side, and compared with multiple groups of protectors arranged side by side, the integrated three-phase motor protector has a greatly reduced volume, thereby improving the space utilization rate of the control cabinet.

[0032] When in use, the three-phase through-core wires of the motor to be protected are connected to the corresponding first hole group, protection system and second hole group respectively (each through-core wire is correspondingly passed through the first through-core wire hole, the through-core hole of the current transformer and the second through-core wire hole). The wiring is very simple during use, which reduces the number of external wires during installation, improves installation efficiency, and greatly reduces the risk of wiring errors, thereby improving the working reliability of the integrated three-phase motor protector. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0034] Figure 1 It is a structural schematic diagram of an integrated three-phase motor protector provided by an embodiment of the utility model;

[0035] Figure 2 is a cross-sectional view of an integrated three-phase motor protector provided by an embodiment of the utility model;

[0036] Figure 3 It is a partial cross-sectional view of an exploded view of an integrated three-phase motor protector provided by an embodiment of the utility model;

[0037] Figure 4 It is a partial schematic diagram of an electronic component board provided by an embodiment of the utility model;

[0038] Figure 5 This is a schematic diagram of the structure of the housing provided by the embodiment of the utility model. Figure 1 ;

[0039] Figure 6 This is a schematic diagram of the structure of the housing provided by the embodiment of the utility model. Figure 2 ;

[0040] Figure 7 This is a schematic diagram of the structure of the upper cover provided by the embodiment of the utility model Figure 1 ;

[0041] Figure 8 This is a schematic diagram of the structure of the upper cover provided by the embodiment of the utility model Figure 2 .

[0042] In the figure:

[0043] 100, electronic component board; 110, protection system; 111, current transformer; 1111, threading hole;

[0044] 200, housing; 201, reinforcing rib; 202, first connecting column; 210, first hole group; 211, first guide column; 2111, first through-core wire hole; 220, cover limiting rib; 221, limiting arm; 222, limiting groove; 230, cover guide rib; 240, first mounting groove; 250, second mounting groove; 260, first buffer fixing groove; 261, first buffer; 270, first dividing groove; 280, first heat dissipation hole; 290, connecting ear; 291, connecting hole;

[0045] 300, upper cover; 301, second connecting column; 310, second hole group; 311, second guide column; 3111, second wire hole; 320, flange; 321, limiting notch; 330, guide groove; 340, third installation groove; 350, second buffer fixing groove; 360, second dividing groove; 370, second heat dissipation hole; 381, plug-in terminal hole; 382, ​​dial code opening hole; 383, indicator light hole;

[0046] 400. Connectors. DETAILED DESCRIPTION

[0047] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0048] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0050] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0051] This embodiment provides an integrated three-phase motor protector that can replace a plurality of protectors arranged side by side, thereby improving the space utilization of the control cabinet, and the installation process is simple and the working reliability is high.

[0052] Specifically, Figure 1-Figure 8 As shown, the integrated three-phase motor protector includes an electronic component board 100, a housing 200 and an upper cover 300. Among them, along the length direction of the electronic component board 100, multiple groups of protection systems 110 are arranged on the electronic component board 100 at intervals, and each group of protection systems 110 is equivalent to a protection system 110 of an independent protector; each group of protection systems 110 includes three current transformers 111, and each current transformer 111 is provided with a threading hole 1111, and the three current transformers 111 correspond to the three-phase currents of the three-phase motor respectively. The electronic component board 100 is installed in the shell body 200. Along the length direction of the shell body 200, a first hole group 210 corresponding to the protection system 110 is provided on the bottom plate of the shell body 200. The first hole group 210 includes three first wire threading holes 2111, and the three first wire threading holes 2111 are respectively arranged opposite to one end of the three threading holes 1111; the upper cover 300 is snap-fittedly connected to the shell body 200. Along the length direction of the upper cover 300, a second hole group 310 corresponding to the protection system 110 is provided on the upper cover 300. The second hole group 310 includes three second wire threading holes 3111, and the three second wire threading holes 3111 are respectively arranged opposite to the other end of the three threading holes 1111.

[0053] When using the integrated three-phase motor protector provided in this embodiment, the three-phase through-core wires of the motor to be protected are connected to the corresponding first hole group 210, the protection system 110 and the second hole group 310 respectively. Taking the need for a protection system 110 as an example, the wiring method is: each through-core wire is correspondingly passed through the first through-core wire hole 2111, the through-core hole 1111 of the current transformer 111 and the second through-core wire hole 3111.

[0054] The integrated three-phase motor protector provided in this embodiment is very simple to connect during use, which reduces the number of external wires during installation, improves installation efficiency, and greatly reduces the risk of wiring errors, thereby improving the working reliability of the integrated three-phase motor protector.

[0055] By setting up multiple protection systems 110 on the electronic component board 100, the functions of multiple protectors are integrated on the one electronic component board 100, so that the integrated three-phase motor protector can replace multiple protectors arranged side by side. Compared with multiple protectors arranged side by side, the integrated three-phase motor protector has a greatly reduced volume, thereby improving the space utilization of the control cabinet.

[0056] Optionally, in this embodiment, eight groups of protection systems 110 are provided on the electronic component board 100, the electronic component board 100 is vertically installed in the housing 200, and the three current transformers 111 of each group of protection systems 110 are respectively arranged on opposite sides of the electronic component board 100. Of course, in other embodiments, the number of protection systems 110 on the electronic component board 100 can also be set to other numbers, which can be set according to actual needs, and this application does not make specific limitations.

[0057] Optionally, continue to see Figure 2 , Figure 3 , Figure 5 and Figure 8 In this embodiment, along the length direction of the housing 200, a first guide post group corresponding to the protection system 110 is provided on the bottom plate of the housing 200, and the first guide post group includes three first guide posts 211, and the three first guide posts 211 are respectively abutted against one side of the three current transformers 111, and the first guide posts 211 are provided with first wire threading holes 2111. Along the length direction of the upper cover 300, a second guide post group corresponding to the protection system 110 is provided on the upper cover 300, and the second guide post group includes three second guide posts 311, and the three second guide posts 311 are respectively abutted against the other side of the three current transformers 111, and the second guide posts 311 are provided with second wire threading holes 3111. With such arrangement, on the one hand, the corresponding first guide post 211 and the second guide post 311 will clamp a current transformer 111, so as to better fix the current transformer 111; on the other hand, the first guide post 211 and the second guide post 311 can insulate and protect the through-core wires; on still another hand, the first guide post 211 and the second guide post 311 can improve the structural strength of the shell 200 and the upper cover 300.

[0058] Further, see Figure 2 , Figure 3 , Figure 5 and Figure 7 , the width direction of the housing 200 ( Figure 5A plurality of cover limiting ribs 220 are provided on both side plates opposite to each other (in the direction shown by the middle Z axis), and the plurality of cover limiting ribs 220 are arranged at intervals along the length direction of the side plates and extend along the width direction of the side plates. A limiting arm 221 extends from one end of the cover limiting rib 220 close to the upper cover 300, and a limiting groove 222 is formed between the limiting arm 221 and the side plate; flanges 320 are provided at opposite ends in the width direction of the upper cover 300, and the flanges 320 are inserted into the corresponding limiting grooves 222, and the bottom surface of the upper cover 300 abuts against the limiting arm 221. By providing a plurality of cover limiting ribs 220, the strength of the housing 200 can be improved and the risk of deformation of the housing 200 can be reduced. By setting the limiting arm 221 and the limiting groove 222 to cooperate with the upper cover 300 and the flange 320, on the one hand, the upper cover 300 is not easily deformed when subjected to downward pressure, resulting in a gap between the flange 320 and the shell 200, thereby improving the pressure resistance of the upper cover 300; on the other hand, the connection strength between the upper cover 300 and the shell 200 is improved, thereby improving the sealing performance of the above-mentioned integrated three-phase motor protector.

[0059] Optionally, in a possible embodiment, a cover guide rib 230 is correspondingly disposed on two opposite sides of each protection system 110 .

[0060] Preferably, continue to see Figure 3 and Figure 5 The flange 320 is provided with a limiting notch 321 corresponding to the cover limiting rib 220, and the limiting notch 321 is engaged with the limiting groove 222. By setting the limiting notch 321 and the limiting groove 222 to cooperate with each other, the displacement of the upper cover 300 along its own length direction can be limited, thereby improving the stability of the installation of the upper cover 300.

[0061] Further, see Figure 5 and Figure 7 , the length direction of the housing 200 ( Figure 5 Cover guide ribs 230 are provided on the two opposite side plates (in the direction indicated by the Y axis), and the cover guide ribs 230 extend along the installation direction of the upper cover 300. Guide grooves 330 are provided at the opposite ends of the length direction of the upper cover 300, and the guide grooves 330 are plugged with the cover guide ribs 230. The cover guide ribs 230 can improve the structural strength of the housing 200; the cooperation between the cover guide ribs 230 and the guide grooves 330 can limit the displacement of the upper cover 300 along its own width direction, thereby improving the stability of the installation of the upper cover 300.

[0062] Optionally, a plurality of cover guide ribs 230 may be provided, each cover guide rib 230 correspondingly provided with a guide groove 330, and a plurality of cover guide ribs 230 are provided at intervals along the width direction of the housing 200. By providing a plurality of cover guide ribs 230 to cooperate with the guide groove 330, the limiting effect is better.

[0063] In this embodiment, two cover guide ribs 230 are provided. In other embodiments, three, four, etc., of the cover guide ribs 230 may be provided, which can be provided according to actual needs, and this application does not make specific limitations.

[0064] Optionally, continue to see Figure 2 , Figure 3 and Figure 5 In a possible embodiment, a first mounting groove 240 extending along the length direction of the housing 200 is provided on the bottom plate of the housing 200, and a first end of the electronic component board 100 in the width direction is plugged into the first mounting groove 240. The electronic component board 100 is fixed by plugging the first mounting groove 240 with the electronic component board 100, which has a simple structure and is convenient for installation and removal of the electronic component board 100.

[0065] Continue to see Figure 2 , Figure 3 and Figure 5 In another possible embodiment, the housing 200 is provided with second mounting grooves 250 on two opposite side plates along the length direction, and the two opposite ends of the electronic component board 100 in the length direction are respectively plugged into the corresponding second mounting grooves 250. The electronic component board 100 is fixed by plugging the second mounting grooves 250 with the electronic component board 100, which has a simple structure and is convenient for installation and removal of the electronic component board 100.

[0066] Continue to see Figure 2 and Figure 8 In other possible embodiments, the upper cover 300 is provided with a third mounting groove 340 extending along the length direction of the upper cover 300, and the second end of the electronic component board 100 in the width direction is plugged into the third mounting groove 340. The electronic component board 100 is fixed by plugging the third mounting groove 340 with the electronic component board 100, which has a simple structure and is convenient for installation and removal of the electronic component board 100.

[0067] It is worth noting that in this embodiment, the housing 200 is provided with a first mounting groove 240 and a second mounting groove 250, and the upper cover 300 is provided with a third mounting groove 340. The four ends of the electronic component board 100 can be fixed by the first mounting groove 240, the second mounting groove 250 and the third mounting groove 340, thereby improving the stability of the installation of the electronic component board 100.

[0068] Optionally, continue to see Figure 2 and Figure 3A first buffer fixing groove 260 is provided on the bottom plate of the housing 200, a first buffer 261 is provided in the first buffer fixing groove 260, and a first end of the electronic component board 100 in the width direction abuts against the first buffer 261. By providing the first buffer 261, the electronic component board 100 can be protected by the buffering performance of the first buffer 261, thereby reducing the risk of damage to the electronic component board 100 when the above-mentioned integrated three-phase motor protector is subjected to collision or impact vibration. Of course, continue to refer to Figure 8 A second buffer fixing groove 350 may also be provided on the upper cover 300, and a second buffer (not shown in the figure) is provided in the second buffer fixing groove 350. The second end of the electronic component board 100 in the width direction abuts against the second buffer, and the electronic component board 100 is protected by the second buffer.

[0069] It is worth mentioning that in this embodiment, a first buffer component fixing groove 260 is provided on the shell 200, and a first buffer component 261 is provided in the first buffer component fixing groove 260, and a second buffer component fixing groove 350 is provided on the upper cover 300, and a second buffer component is provided in the second buffer component fixing groove 350. With such a configuration, the protection performance of the electronic component board 100 is better, and the risk of damage to the electronic component board 100 is greatly reduced.

[0070] Further, see Figure 1 , Figure 6 and Figure 7 In one possible embodiment, a first partition groove 270 is provided on the outer wall of the bottom plate of the shell 200 between two adjacent first hole groups 210. By providing the first partition groove 270, the position of the protection system 110 in the shell 200 can be marked, which is convenient for wiring during use, has a fool-proof function, and reduces the risk of wiring errors. In another possible embodiment, a second partition groove 360 ​​can also be provided on the top surface of the upper cover 300 between two adjacent second hole groups 310. By providing the second partition groove 360, the position of the protection system 110 in the shell 200 can be marked, which is convenient for wiring during use, has a fool-proof function, and reduces the risk of wiring errors. In other possible embodiments, the first partition groove 270 can also be provided on the shell 200, and the second partition groove 360 ​​can be provided on the upper cover 300 at the same time. It can be provided according to actual needs, and this application does not make specific limitations.

[0071] Optionally, continue to see Figure 1-Figure 3 , Figure 6 and Figure 7In one possible example, a first heat dissipation hole 280 is provided on the housing 200, and the heat generated by the electronic component board 100 can be quickly diffused to the outside of the housing 200 through the first heat dissipation hole 280, thereby accelerating the heat dissipation speed of the above-mentioned integrated three-phase motor protector, thereby effectively suppressing its temperature rise, which is beneficial to protecting the above-mentioned integrated three-phase motor protector. In another possible embodiment, a second heat dissipation hole 370 can also be provided on the upper cover 300, and the heat generated by the electronic component board 100 can be quickly diffused to the outside of the housing 200 through the second heat dissipation hole 370, thereby accelerating the heat dissipation speed of the above-mentioned integrated three-phase motor protector, thereby effectively suppressing its temperature rise, which is beneficial to protecting the above-mentioned integrated three-phase motor protector. In other possible embodiments, a first heat dissipation hole 280 can be provided on the housing 200, and a second heat dissipation hole 370 can be provided on the upper cover 300 at the same time. It can be set according to actual needs, and this application does not make specific limitations.

[0072] Optionally, in this embodiment, the housing 200 is provided with four groups of heat dissipation holes, which are arranged in two rows and two columns at the four corners of the housing 200, and each group of heat dissipation holes includes a plurality of heat dissipation holes arranged side by side. The arrangement of the heat dissipation holes on the upper cover 300 is the same as that on the housing 200.

[0073] It is understandable that the heat dissipation holes may be arranged in other ways, and the number and uniformity of the heat dissipation holes may affect the speed and uniformity of heat dissipation.

[0074] Optionally, continue to see Figure 1 and Figure 7 A plug-in terminal hole 381 is provided on the upper cover 300, and the plug-in terminal hole 381 is arranged opposite to the plug-in terminal seat on the electronic component board 100. The plug-in terminal seat is exposed by setting the plug-in terminal hole 381, which facilitates the electrical connection between the plug-in terminal seat and the outside. The plug-in terminal seat is mainly used for communication or as a power interface of the integrated three-phase motor protector.

[0075] Optionally, continue to see Figure 1 and Figure 7 The upper cover 300 is provided with a dial opening 382, ​​which is arranged opposite to the dial switch on the electronic component board 100. The dial opening 382 is provided to expose the dial switch, which is convenient for operating the dial switch.

[0076] Optionally, continue to see Figure 1 and Figure 7 An indicator light hole 383 is provided on the upper cover 300, and the indicator light hole 383 is arranged opposite to the indicator light on the electronic component board 100. By setting the indicator light hole 383 to expose the indicator light, it is convenient for the staff to intuitively understand the working status of the above-mentioned integrated three-phase motor protector.

[0077] It is worth noting that, in the present embodiment, the upper cover 300 is provided with a plug-in terminal hole 381 , a dial opening 382 and an indicator light hole 383 .

[0078] Further, see Figure 1 , Figure 5 and Figure 6 The housing 200 is provided with a connecting ear 290, and the connecting ear 290 is provided with a connecting hole 291, and the integrated three-phase motor protector is fixed in the control cabinet through the connecting hole 291. The above-mentioned integrated three-phase motor protector is fixed by the connecting ear 290, which has a simple structure and is easy to install.

[0079] Optionally, in this embodiment, four connecting ears 290 are provided, and the four connecting ears 290 are arranged in two rows and two columns on the side plate in the length direction of the housing 200. In other embodiments, the connection ears 290 can also be arranged in other ways according to actual needs.

[0080] Optionally, continue to see Figure 5 At least one side plate of the housing 200 is provided with a plurality of reinforcing ribs 201. By providing a plurality of reinforcing ribs 201, the structural strength of the housing 200 can be improved.

[0081] Since the side plate connecting the housing 200 and the control cabinet is more likely to deform, in this embodiment, the reinforcing rib 201 is provided on the side plate of the housing 200 where the connecting ear 290 is provided.

[0082] Of course, reinforcing ribs 201 may also be provided on each side panel of the shell 200 according to actual needs, and this application does not make any specific limitation.

[0083] Optionally, in this embodiment, the plurality of reinforcing ribs 201 are arranged in a mesh shape. In other embodiments, the plurality of reinforcing ribs 201 may be arranged in other ways, such as horizontally spaced arrangements, according to actual needs.

[0084] Optionally, continue to see Figure 2 , Figure 5 and Figure 8 The shell 200 is provided with a first connecting column 202, and the upper cover 300 is provided with a second connecting column 301, the second connecting column 301 is plugged with the first connecting column 202, and the connecting piece 400 passes through the second connecting column 301 and is connected with the first connecting column 202. The upper cover 300 and the shell 200 are assembled by the cooperation of the first connecting column 202, the second connecting column 301 and the connecting piece 400, which has a simple structure, is easy to install and disassemble, and has a high connection strength. By setting the first connecting column 202 and the second connecting column 301 to be plugged, the connection strength between the upper cover 300 and the shell 200 can be improved, and the installation of the connecting piece 400 is also convenient.

[0085] Optionally, in this embodiment, there are four first connecting posts 202 and four second connecting posts 301. The four first connecting posts 202 are arranged in two rows and two columns on the housing 200, and the four second connecting posts 301 are also arranged in two rows and two columns on the upper cover 300, and the first connecting posts 202 and the second connecting posts 301 are arranged in a one-to-one correspondence. In other embodiments, the number and arrangement of the first connecting posts 202 and the second connecting posts 301 can also be other, and can be arranged according to actual needs, and this application does not make specific limitations.

[0086] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. Integrated three-phase motor protector, characterized in that: include: An electronic component board (100), wherein a plurality of groups of protection systems (110) are arranged at intervals on the electronic component board (100) along the length direction of the electronic component board (100), each group of the protection systems (110) comprises three current transformers (111), and each current transformer (111) is provided with a threading hole (1111); A housing (200), wherein the electronic component board (100) is installed in the housing (200), and along the length direction of the housing (200), a first hole group (210) corresponding to the protection system (110) is provided on the bottom plate of the housing (200), wherein the first hole group (210) includes three first wire threading holes (2111), and the three first wire threading holes (2111) are respectively arranged opposite to one end of the three wire threading holes (1111); The upper cover (300) is buckled and connected to the shell (200), and a second hole group (310) corresponding to the protection system (110) is provided on the upper cover (300) along the length direction of the upper cover (300), and the second hole group (310) includes three second wire threading holes (3111), and the three second wire threading holes (3111) are respectively arranged opposite to the other ends of the three wire threading holes (1111).

2. The integrated three-phase motor protector according to claim 1, characterized in that: A first guide column group corresponding to the protection system (110) is provided on the bottom plate of the housing (200) along the length direction of the housing (200), the first guide column group comprising three first guide columns (211), the three first guide columns (211) respectively abutting against one side of the three current transformers (111), and the first guide columns (211) are provided with the first core wire holes (2111); A second guide column group corresponding to the protection system (110) is provided on the upper cover (300) along the length direction of the upper cover (300), the second guide column group comprising three second guide columns (311), the three second guide columns (311) respectively abutting against the other side of the three current transformers (111), and the second guide columns (311) are provided with the second core wire holes (3111).

3. The integrated three-phase motor protector according to claim 1, characterized in that: A plurality of cover limiting ribs (220) are provided on two side plates opposite to each other in the width direction of the shell (200); the plurality of cover limiting ribs (220) are arranged at intervals along the length direction of the side plates and extend along the width direction of the side plates; a limiting arm (221) extends from one end of the cover limiting rib (220) close to the upper cover (300); a limiting groove (222) is formed between the limiting arm (221) and the side plates; The upper cover (300) is provided with flanges (320) at two opposite ends in the width direction, and the flanges (320) are inserted into the corresponding limiting grooves (222), and the bottom surface of the upper cover (300) abuts against the limiting arms (221).

4. The integrated three-phase motor protector according to claim 3, characterized in that: The flange (320) is provided with a limiting notch (321) corresponding to the cover limiting rib (220) one by one, and the limiting notch (321) and the limiting groove (222) are mutually engaged.

5. The integrated three-phase motor protector according to claim 1, characterized in that: Cover guide ribs (230) are provided on two opposite side plates in the length direction of the shell (200), and the cover guide ribs (230) extend along the installation direction of the upper cover (300). Guide grooves (330) are provided at two opposite ends in the length direction of the upper cover (300), and the guide grooves (330) are plugged into the cover guide ribs (230).

6. The integrated three-phase motor protector according to claim 1, characterized in that: A first mounting groove (240) extending along the length direction of the housing (200) is provided on the bottom plate of the housing (200), and a first end of the electronic component board (100) in the width direction is plugged into the first mounting groove (240); And / or, the housing (200) is provided with second mounting grooves (250) on two opposite side plates along the length direction, and the two opposite ends of the electronic component board (100) in the length direction are respectively plugged into the corresponding second mounting grooves (250); And / or, the upper cover (300) is provided with a third mounting groove (340) extending along the length direction of the upper cover (300), and the second end of the electronic component board (100) in the width direction is plugged into the third mounting groove (340).

7. The integrated three-phase motor protector according to claim 1, characterized in that: A first buffer member fixing groove (260) is provided on the bottom plate of the housing (200), a first buffer member (261) is provided in the first buffer member fixing groove (260), and a first end of the electronic component board (100) in the width direction abuts against the first buffer member (261); And / or, a second buffer member fixing groove (350) is provided on the upper cover (300), a second buffer member is provided in the second buffer member fixing groove (350), and the second end of the electronic component board (100) in the width direction abuts against the second buffer member.

8. The integrated three-phase motor protector according to claim 1, characterized in that: A first dividing groove (270) is provided on the outer wall of the bottom plate of the shell (200) between two adjacent first hole groups (210); and / or a second dividing groove (360) is provided on the top surface of the upper cover (300) between two adjacent second hole groups (310).

9. The integrated three-phase motor protector according to claim 1, characterized in that: The housing (200) is provided with a first heat dissipation hole (280); and / or the upper cover (300) is provided with a second heat dissipation hole (370).

10. The integrated three-phase motor protector according to any one of claims 1 to 9, characterized in that: The upper cover (300) is provided with a plug-in terminal hole (381), and the plug-in terminal hole (381) is arranged opposite to the plug-in terminal seat on the electronic component board (100); And / or, a dial opening (382) is provided on the upper cover (300), and the dial opening (382) is arranged opposite to the dial switch on the electronic component board (100); And / or, an indicator light hole (383) is provided on the upper cover (300), and the indicator light hole (383) is arranged opposite to the indicator light on the electronic component board (100).

11. The integrated three-phase motor protector according to any one of claims 1 to 9, characterized in that: The housing (200) is provided with a connecting ear (290), the connecting ear (290) is provided with a connecting hole (291), and the integrated three-phase motor protector is fixed in the control cabinet through the connecting hole (291).

12. The integrated three-phase motor protector according to any one of claims 1 to 9, characterized in that: A plurality of reinforcing ribs (201) are provided on at least one side plate of the shell (200).

13. The integrated three-phase motor protector according to any one of claims 1 to 9, characterized in that: The shell (200) is provided with a first connecting column (202), the upper cover (300) is provided with a second connecting column (301), the second connecting column (301) is plugged into the first connecting column (202), and the connecting piece (400) passes through the second connecting column (301) and is connected to the first connecting column (202).

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