Bar-type fuse disconnecting switch and disconnecting switch group

Abstract

The present invention provides a strip fuse disconnector, which includes a base, a clamping plate, and at least one fuse unit arranged in the base and the clamping plate, and each fuse unit includes a handle bracket assembly, a fuse core, a contact assembly, and a hanging assembly. The handle bracket assembly includes a bracket and a handle arranged in the bracket, and the bracket is rotatably connected to the clamping plate. The fuse core is detachably connected to the inner wall of the bracket to follow the handle linkage. The contact assembly is arranged in the base opposite to the fuse core, and the contact assembly includes a contact and an input and output line terminal electrically connected to the contact and extending to the bottom of the base, and the fuse core electrode is closed or disconnected with the contact. The hanging assembly includes a clamping bracket, a hanging body, and a fastener. The hanging body is detachably connected to the base through the clamping bracket, and the hanging body is suspended from the busbar and the input and output line terminals are opposite to the busbar. The fastener locks the hanging body to the base so that the input and output line terminals are in close contact with the busbar.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical switches, and in particular to a strip fuse disconnector and a disconnector group. Background Art

[0002] Strip fuse disconnectors are integrated disconnectors. They are mainly used in power distribution circuits and motor circuits with high short-circuit currents, and have the functions of "manual connection", "load disconnection" and "isolation". Strip fuse disconnectors make full use of the protective characteristics of the fuse core. When facing large currents, the fuse core can be quickly disconnected to protect the disconnector. Strip fuse disconnectors have been widely used due to their advantages such as strong breaking capacity, high reliability and small size.

[0003] During actual use and installation, the strip fuse disconnector needs to be installed on the busbar of the control cabinet. When installing the existing strip fuse disconnector on the busbar, one method is to drill holes on the busbar and then fix the switch to the busbar with screws, which is very troublesome to install. Another method is to install it in a hanging manner, first pre-install the hanging terminal and part of the base, and then hang the pre-installed switch and part of the base on the busbar. After the hanging installation is completed, the clamping plate and other components on the base are installed on the switch until all the installation is completed. Since the clamping plate and other components on the base are to be installed after being hung on the busbar, this greatly increases the difficulty of switch assembly. Not only is the process very complicated, time-consuming and labor-intensive, but it also requires at least two people to install. In addition, in the existing strip fuse disconnector, the bracket is simply rotated and connected to the base, and anyone can rotate the bracket to operate the switch, and the safety performance of the switch is low. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a strip fuse disconnector and a disconnector group which are easy to install.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a strip fuse disconnector, which includes a base, a clamping plate and at least one fuse unit arranged in the base and the clamping plate, and each fuse unit includes a handle bracket assembly, a fuse core, a contact assembly and a hanging assembly. The handle bracket assembly includes a bracket and a handle arranged in the bracket, and the bracket is rotatably connected to the base. The fuse core is detachably connected to the inner wall of the bracket to follow the handle linkage. The contact assembly is arranged in the base opposite to the fuse core, and the contact assembly includes a contact and an input and output line terminal electrically connected to the contact and extending to the bottom of the base, and the fuse core electrode is closed or disconnected with the contact. The hanging assembly includes a snap-fit bracket, a hanging body and a fastener, and the hanging body is detachably connected to the base through the snap-fit bracket, and the hanging body is suspended from the busbar and the input and output line terminals are opposite to the busbar, and the fastener locks the hanging body and the input and output line terminals to the busbar.

[0006] According to an embodiment of the present invention, the engaging bracket includes an engaging body portion, elastic engaging portions provided on both sides of the engaging body portion, and two claw catches provided at the ends of the engaging body portion. The engaging body portion is press-fitted into the base through the elastic engaging portions, and the two claw catches grip the incoming and outgoing wire ends.

[0007] According to an embodiment of the present invention, the elastic engaging portions are two engaging walls provided on both sides of the engaging body portion. A deformation cavity is formed between the engaging walls and the engaging body portion to enable elastic deformation of the engaging walls. A limiting groove is provided on the outer surface of the engaging walls, and a limiting protrusion column matching the limiting groove is provided on the inner wall of the base.

[0008] According to an embodiment of the present invention, each fuse unit further includes an arc extinguishing component provided in the clamping plate. The arc extinguishing component includes an arc extinguishing grid and an arc separating plate. The arc extinguishing grid faces the fuse core, and the arc separating plate is detachably provided on the side of the arc extinguishing grid away from the fuse core.

[0009] According to an embodiment of the present invention, the arc separating plate includes an arc separating plate body and a hanging ear provided at the top of the arc separating plate body and extending out of the clamping plate. A locking hole is provided on the hanging ear, and a hanging ear perforation is provided on the bracket. When the bracket covers the clamping plate, the hanging ear passes through the hanging ear perforation on the bracket, and a hanging lock is suspended in the locking hole to lock the arc separating plate and the bracket.

[0010] According to an embodiment of the present invention, the arc separating plate includes an arc separating plate body, connecting portions provided on both sides of the arc separating plate body, and an insertion portion provided on the back of the arc separating plate body. Two insertion columns are provided on the connecting portions. The inner wall of the clamping plate has two jacks matching the insertion columns, and a supporting portion protruding towards the inside of the clamping plate is provided on one side of each jack. A slot is provided on the supporting portion, and the insertion portion of the arc separating plate is detachably inserted into the slot.

[0011] According to an embodiment of the present invention, the insertion portion includes a horizontal insertion portion and a vertical strengthening portion, and the slot is a horizontal slot facing the horizontal insertion portion.

[0012] According to an embodiment of the present invention, each fuse unit further includes an outgoing wire clip. The outgoing wire clip includes a clip clamping plate, two elastic cards provided on both sides of the clip clamping plate, and a hand-held portion provided at both ends of the clip clamping plate and extending away from the clamping plate. The clip clamping plate is detachably clamped to the side wall of the clamping plate through the two elastic cards and fixes multiple wires to the side wall of the clamping plate.

[0013] According to an embodiment of the present invention, each fuse unit further includes a test locking assembly. The test locking assembly includes an insulating connecting member and a locking member. The insulating connecting member passes through the handle bracket and contacts the contact. The locking member is disposed at the bottom end of the insulating connecting member and has a locking position and an unlocking position. During the short-time withstand current test, the locking member is in the locking position, and the locking member engages with the locking cooperation portion on the contact to lock the fuse core electrode in the contact for the short-time withstand current test. During normal use, the insulating connecting member drives the locking member to move to the unlocking position.

[0014] Correspondingly, the present invention further provides a disconnecting switch group, which includes at least two of the above-mentioned strip fuse disconnecting switches and at least one parallel card for connecting two adjacent strip fuse disconnecting switches.

[0015] In summary, in the strip fuse disconnecting switch and the disconnecting switch group provided by the present invention, a hanging assembly is provided in each fuse unit. During installation, after the strip fuse disconnecting switch is integrally installed, the clamping bracket pre-clamps and installs the hanging body in the base. Then the overall switch is hung on the busbar through the hanging body. Open the handle bracket assembly, adjust the fastener from inside the switch, and lock the hanging body and the incoming and outgoing line ends to the busbar, thereby completing the connection between the strip fuse disconnecting switch and the busbar. The setting of the hanging assembly greatly simplifies the connection method between the strip fuse disconnecting switch and the busbar. After hanging, only one component, the fastener, needs to be adjusted, and the installation is very convenient, saving time and effort.

[0016] To make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following specific preferred embodiments are given in conjunction with the accompanying drawings and described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The structure diagram of the strip fuse disconnecting switch provided by an embodiment of the present invention is shown.

[0018] Figure 2 As shown Figure 1 The enlarged schematic view of part A in

[0019] Figure 3 As shown Figure 1 The structure diagram of the strip fuse disconnecting switch in

[0020] Figure 4 As shown Figure 1 The structure diagram of the hanging assembly in

[0021] Figure 5 As shown Figure 4 The structure diagram from another perspective.

[0022] Figure 6 As shownFigure 4 Schematic diagram of the structure of the middle clamping bracket.

[0023] Figure 7 As shown in Figure 4 Schematic diagram of the structure of the middle hanging body.

[0024] Figure 8 Schematic diagram of the structure with the bracket opened relative to the base.

[0025] Figure 9 Schematic diagram of the structure of the bar-type fuse disconnecting switch in the padlock state.

[0026] Figure 10 Schematic diagram of the internal structure of the splint.

[0027] Figure 11 As shown in Figure 10 Enlarged schematic diagram at position B in the middle.

[0028] Figure 12 and Figure 13 Schematic diagram of the structure of the arc-dividing plate.

[0029] Figure 14 Schematic diagram of the structure of the bar-type fuse disconnecting switch with an outgoing line clamp.

[0030] Figure 15 As shown in Figure 14 Schematic diagram of the structure at position C in the middle.

[0031] Figure 16 and Figure 17 Schematic diagram of the structure of the outgoing line clamp.

[0032] Figure 18 Schematic diagram of the structure of the bar-type fuse disconnecting switch with a test locking component.

[0033] Figure 19 As shown in Figure 18 Cross-sectional schematic diagram of

[0034] Figure 20 As shown in Figure 19 Schematic diagram of the structure from another perspective.

[0035] Figure 21 As shown in Figure 18 Another cross-sectional view of

[0036] Figure 22 As shown in Figure 21 Enlarged schematic diagram at position D in the middle.

[0037] Figure 23 Schematic diagram of the structure of the test locking component in the locked state.

[0038] Figure 24 Shown is a schematic diagram of the structure of the test locking assembly in the unlocked state.

[0039] Figure 25 Shown is a schematic diagram of the test locking assembly structure.

[0040] Figure 26 Shown Figure 25 Schematic cross-section diagram of .

[0041] Figure 27 Shown is a schematic diagram of the contact structure.

[0042] Figure 28 Shown is a schematic diagram of the structure of the isolating switch group.

[0043] Figure 29 Shown Figure 28 Enlarged schematic diagram of point E in the middle.

[0044] Figure 30 Shown Figure 28 Schematic diagram of the structure after the parallel card components are separated.

[0045] Figure 31 Said Figure 30 Enlarged schematic diagram of point F in the middle.

[0046] Figure 32 and 33 Shown is a schematic diagram of the structure of parallel card components. DETAILED DESCRIPTION

[0047] like Figures 1 to 8 as well as Figure 19 As shown, the strip fuse disconnector 100 provided in this embodiment includes a base 10, a clamping plate 50, and at least one fuse unit 20 arranged in the base 10 and the clamping plate 50, and each fuse unit 20 includes a handle bracket assembly 1, a fuse core 2, a contact assembly 3, and a hanging assembly 5. The handle bracket assembly 1 includes a bracket 11 and a handle 12 arranged on the bracket 11, and the bracket 11 is rotatably connected to the clamping plate 50. The fuse core 2 is detachably connected to the inner wall of the bracket 11 to follow the linkage of the handle 12. The contact assembly 3 is arranged in the base 10 relative to the fuse core 2, and the contact assembly 3 includes a contact 31 and an inlet and outlet terminal 32 electrically connected to the contact 31 and extending to the bottom of the base 10, and the fuse core electrode 21 is closed or disconnected with the contact 31. The hanging assembly 5 includes a snap-fit bracket 51, a hanging body 52 and a fastener 53. The hanging body 52 is detachably connected to the base 10 via the snap-fit bracket 51. The hanging body 52 is suspended on the busbar 30 and the input and output line terminals 32 are opposite to the busbar 30. The fastener 53 locks the hanging body 52 and the input and output line terminals 32 to the busbar.

[0048] The clamping bracket 51 realizes the pre-connection of the hanging body 52 and the base 10, while the fastener 53 realizes the locking of the hanging body 52 and the busbar 30 after the switch is hung on the busbar and the contact electrical connection between the incoming and outgoing line end 32 and the busbar 30. The setting of the hanging assembly 5 greatly facilitates the assembly of the bar-type fuse disconnect switch and its connection with the busbar, saving time and effort in installation. In this embodiment, as Figure 1 shown, there are three fuse units 20 in the base 10 and the clamping plate 50. However, the present invention does not make any limitation in this regard. In other embodiments, one, two or more than four fuse units can also be provided in the base and the clamping plate.

[0049] As Figure 7 shown, the hanging body 52 includes a hanging body portion 521 and two hooks 522 provided on both sides of the hanging body portion 521 and hanging on the busbar 30. The hanging body portion 521 has a first fastener mounting hole 523. As Figure 4 and Figure 5 shown, the clamping bracket 51 includes a clamping body portion 511, two elastic clamping portions 512 provided on both sides of the clamping body portion 511, and two claw catches 513 provided at the end of the clamping body portion 511. The clamping body portion 511 has a second fastener mounting hole 5111 coaxial with the first fastener mounting hole 523. Specifically, the clamping body portion 511 is sleeved and wrapped around the hanging body portion 521, and the clamping body portion 511 is press-fitted into the base 10 through the elastic clamping portions 512; the incoming and outgoing line end 32 includes a vertical connection section 321 connected to the contact and a horizontal extension section 322 extending in the length direction of the base 10, and the two claw catches 513 grip the vertical connection section 321 of the incoming and outgoing line end. During installation, the two claw catches 513 can move vertically relative to the vertical connection section 321 to make the hanging body 52 snap into the base 10. The setting of the claw catches 513 limits the position of the hanging assembly 5 in the length direction of the base 10 and prevents the hanging assembly 5 from moving along the length direction of the base 10.

[0050] In this embodiment, the elastic clamping portions 512 are two clamping walls provided on both sides of the clamping body portion 511, and a deformation cavity 510 is formed between the clamping walls and the clamping body portion 511 to enable the clamping walls to undergo elastic deformation. However, the present invention does not make any limitation in this regard. In other embodiments, the elastic clamping portion can also be an elastic card provided on the side wall of the clamping body portion, and the elastic card has a hook, and the base has a slot corresponding to the hook.

[0051] In this embodiment, the outer surface of the clamping wall further has a limiting groove 5121, Figure 2 in which, on the inner wall of the base 10, there is a limiting convex column 101 cooperating with the limiting groove 5121. The setting of the limiting groove 5121 and the limiting convex column 101 further strengthens the limiting strength of the hanging assembly 5 in the length direction of the base 10.

[0052] To improve the safety of the fuse core breaking, in this embodiment, as Figure 8 shown, each fuse unit 20 further includes an arc extinguishing component 6 disposed in the clamping plate 50. The arc extinguishing component 6 includes an arc extinguishing grid 61 and an arc separating plate 62. The arc extinguishing grid 61 faces the fuse core 2, and the arc separating plate 62 is detachably disposed on the side of the arc extinguishing grid 61 away from the fuse core 2. The setting of the arc separating plate 62 avoids the mutual influence of arcs when adjacent fuse units 20 are broken, improving the safety of the switch.

[0053] Specifically, in this embodiment, as Figure 12 and Figure 13 shown, the arc separating plate 62 includes an arc separating plate body 621, connecting portions 622 disposed on both sides of the arc separating plate body 621, and an insertion portion 624 disposed on the back of the arc separating plate body 621. There are two insertion columns 623 on the connecting portion 622. As Figure 11 shown, the inner wall of the clamping plate 50 has two jacks 501 that cooperate with the insertion columns 624, and on one side of each jack 501, there is a support portion 502 protruding towards the inside of the base. There is a slot 5021 on the support portion 502. The insertion portion 624 of the arc separating plate is detachably inserted into the slot 5021. During installation, the arc separating plate 62 can be detachably connected to the clamping plate 50 through the insertion portion 624 and the insertion columns 623. The settings of the insertion portion 624 and the slot 5021 achieve the support in the middle of the arc separating plate, ensuring that the arc separating plate 62 can be stably assembled in the clamping plate 50.

[0054] To improve the installation strength, in this embodiment, the insertion portion 624 includes a horizontal insertion portion 6241 and a vertical strengthening portion 6242, and the slot 5021 is a horizontal slot facing the horizontal insertion portion 6241. The setting of the vertical strengthening portion 6232 greatly improves the connection strength between the horizontal insertion portion 6241 and the arc separating plate body 621.

[0055] In the existing strip fuse disconnect switch, the bracket is only simply rotatably connected to the clamping plate, and non-professionals are prone to misoperation. In view of this, in this embodiment, as shown in Figure 8 , Figure 12 and Figure 13As shown, the arc separating plate 62 further includes a hanging ear 625 disposed at the top of the arc separating plate body 621 and extending out of the clamping plate. The hanging ear 625 has a lock hole 6251, and the bracket 11 has a hanging ear perforation 111. When the bracket 11 is covered on the base 10, the hanging ear 625 passes through the hanging ear perforation 111 on the bracket, and the hanging lock 40 is suspended in the lock hole 6251 to lock the arc separating plate 62 and the bracket 11, thus effectively preventing misoperations caused by non-professionals opening the bracket. The hanging lock arrangement based on the arc separating plate greatly simplifies the structure of the switch. At the same time, the detachable arc separating plate also enables the selection of whether to set the hanging ear and the lock hole according to the user's needs, greatly improving the applicability and expandability of the switch.

[0056] When the bar type fuse disconnecting switch is in use, each fuse unit 20 needs to be connected to external devices through multiple wires. When the number of fuse units is multiple, the number of wires is large, the wiring is chaotic and there are certain safety hazards. Therefore, in this embodiment, as Figures 14 to 17 shown, each fuse unit 20 is further provided with an outgoing line clamp 7. The outgoing line clamp 7 includes a clamp plate 71, two elastic cards 72 arranged on both sides of the clamp plate 71, and a hand-held part 73 arranged at both ends of the clamp plate 71 and extending away from the clamping plate. The clamp plate 71 is detachably clamped to the side wall of the clamping plate through two elastic cards 72, and multiple wires 50 are fixed to the side wall of the clamping plate 50.

[0057] Specifically, each elastic card 72 has two hook parts 721 that are engaged and limited with the inner wall of the clamping plate, so as to stably clamp the outgoing line clamp 7 to the side wall of the clamping plate. After the multiple wires are sorted, they are restricted between the outgoing line body 71 and the side wall of the clamping plate. During assembly, the operator can insert or pull out the outgoing line clamp 7 by applying force to the hand-held part 73. To improve the strength of the clamp plate 71, in this embodiment, a reinforcing member 74 bent in an arch shape is further arranged between the two hand-held parts 73, and a reinforcing block 75 is also arranged at the connection between the elastic card 72 and the clamp plate 71.

[0058] When the bar type fuse disconnecting switch is in use, when a short circuit occurs in the power grid, it is required to quickly act to cut off the short circuit circuit. However, since it takes time to cut off the short circuit circuit, it is required that the bar type fuse disconnecting switch on the main circuit can withstand the thermal shock of the short circuit current within a short time without being damaged. Therefore, when the bar type fuse disconnecting switch leaves the factory, it needs to be subjected to a short-time withstand current test to assess its withstand ability. During the test, the fuse core needs to be fixed on the contact to enable it to withstand a large current of 25KA within a certain time (such as 1 second) without breaking. In this embodiment, as Figures 18 to 27As shown, each fuse unit 20 further includes a test locking assembly 4. The test locking assembly 4 includes an insulating connecting member 41 and a locking member 42. The insulating connecting member 41 passes through the handle bracket 11 and contacts the contact 31. The locking member 42 is disposed at the bottom end of the insulating connecting member 41 and has a locking position and an unlocking position. During the short-time withstand current test, the locking member 42 is in the locking position, and the locking member 42 engages with the locking mating portion on the contact 31 to lock the fuse core electrode 21 in the contact 31 for the short-time withstand current test. During normal use, the insulating connecting member 41 drives the locking member 42 to move to the unlocking position.

[0059] In this embodiment, the top of the bracket 11 has an assembly hole opposite to the contact 3. The insulating connecting member 41 is rotatably connected to the assembly hole. The locking member 42 is fixed to the bottom end of the insulating connecting member 41 and moves with the insulating connecting member 41 between the locking position and the unlocking position. This setting enables the operator to rotate the insulating connecting member 41 located outside the bracket 11 to switch the locking member 42 between the locking position and the unlocking position, thereby realizing the locking of the fuse core during the test after assembly. However, the present invention does not make any limitation on the adjustment method of the insulating connecting member.

[0060] Specifically, in this embodiment, the contact 31 includes two relatively arranged contact spring pieces 311. The fuse core electrode 21 is clamped between the two contact spring pieces 311 to be closed with the contact 31. Each contact spring piece 311 has a locking hole 3110, and the locking hole 3110 forms a locking mating portion. In the locked state, the locking member 42 vertically straddles between the two contact spring pieces 311 and its two ends are inserted into the two locking holes 3110 to lock the fuse core electrode 21 between the two contact spring pieces 311. When unlocking, the locking member 42 rotates with the insulating connecting member 41, and its two ends slide out of the two locking holes 3110.

[0061] To facilitate the insertion and locking and the sliding and unlocking of the locking member 42, in this embodiment, the locking hole 3110 is provided with an opening and the opening direction faces the side where the fuse core 2 is located. The locking hole 3110 with an opening provides space for the rotation of the locking member 42, enabling it to smoothly insert into or slide out of the locking hole 3110. However, the present invention does not make any limitation on this. In other embodiments, the locking hole can also be a through hole with a closed perimeter in the middle of the contact spring piece.

[0062] In this embodiment, the width of the locking member 42 is set to be smaller than the width of the fuse core electrode 21. This setting ensures that at the unlocking position, the locking member 42 will not cause any interference to the disconnection of the fuse core 2 and the contact 31. For the convenience of the locking member 42 and the fuse core electrode 21 being inserted between the two contact spring pieces 311, in this embodiment, each contact spring piece 311 includes a contact engaging portion 3111 and a guiding portion 3112 which is arranged at the upper end of the contact engaging portion 3111 and expands outwards. The locking hole 3110 is arranged at the upper end portion of the contact engaging portion 3111. The outwardly expanding guiding portion 3112 provides a larger space for the insertion of the locking member 42 and the fuse core electrode 21.

[0063] In this embodiment, the insulating connecting member 41 is an insulating plastic screw. The top of the plastic screw has a cross-shaped driving groove 411 and locking marks 412 and unlocking marks 413 located on the peripheral wall of the driving groove 411. The operator can rotate the plastic screw according to the locking marks 412 and the unlocking marks 413 to drive the rotation of the locking member 42. In this embodiment, the entire test locking assembly is made of insulating material, and this setting greatly improves the stability of the test. However, the present invention does not make any limitation in this regard. In other embodiments, the locking member can also be made of metal to increase the strength in the locked state.

[0064] In this embodiment, as Figure 23 and Figure 24 shown, the handle bracket 1 includes a bracket 11 and a handle 12 which is telescopically connected to the bracket 11. The fuse core 2 is detachably connected to the bracket 11 through a fuse core hanging plate. Specifically, both sides of the bracket 11 have a handle mounting groove 112, and both ends of the handle 12 can be telescopically inserted into the handle mounting groove 112. The handle 12 includes a hand-held portion 121, two handle connecting portions 122 arranged at both ends of the hand-held portion 121, and a handle engaging member 123 arranged on the handle connecting portion 222. The handle engaging member 123 moves relative to the handle connecting portion 222 to engage or disengage with the handle mounting groove 112. When the handle engaging member 123 disengages from the handle mounting groove 112, the depth of the handle connecting portion 222 inserted into the handle mounting groove 112 is adjusted by pulling up and down the hand-held portion 121, so as to realize the adjustment of the height of the handle 12. After the adjustment is in place, the handle engaging member 123 engages with the handle mounting groove 112, thereby locking the handle 12 and the bracket 11. The height-adjustable handle 12 enables the bar-type fuse disconnecting switch to be applicable to cabinets with different installation heights, reduces the installation requirements, and has better versatility. In addition, this setting also greatly reduces the space occupied by the bar-type fuse disconnecting switch during transportation.

[0065] Correspondingly, as Figure 29 and Figure 31As shown in the figure, the present embodiment further provides a disconnect switch group, which includes two of the above-mentioned strip fuse disconnect switches 100 and a parallel connection card 200 connecting the two strip fuse disconnect switches 100. However, the present invention makes no limitation thereto. In other embodiments, the disconnect switch group may also include a plurality of strip fuse disconnect switches and a plurality of parallel connection cards, and the parallel connection cards are detachably connected to adjacent two strip fuse disconnect switches.

[0066] In the present embodiment, as Figure 31 shown, on each strip fuse disconnect switch 100, the bottom of the base 10 has a groove 102, the opening of the groove 102 has a groove connection part 103 that partially covers the groove, and the groove connection part 103 has a hook part 104 protruding into the inside of the groove. The parallel connection card 200 includes a card body 201 and elastic card hooks 202 provided on both sides of the card body 201. The ends of the two elastic card hooks 202 gradually approach each other inward, and an accommodation groove 203 is formed between the two elastic card hooks 202 and the card body 201.

[0067] During assembly, the groove connection parts 103 on the bases 10 of the two strip fuse disconnect switches are press-fitted into the accommodation groove 203, and the two elastic card hooks 202 respectively extend into the corresponding grooves 102 and are interlocked with the corresponding hook parts 104, thereby realizing the parallel interlock of the two strip fuse disconnect switches.

[0068] In summary, in the strip fuse disconnect switch and the disconnect switch group provided by the present invention, a hanging component is provided in each fuse unit. During installation, after the strip fuse disconnect switch is integrally installed, the clamping bracket pre-clamps and installs the hanging body in the base. Then, the overall switch is hung on the busbar through the hanging body, and the fastening member is adjusted to lock the hanging body to the base and make the incoming and outgoing wire ends closely attached to the busbar, thereby completing the connection between the strip fuse disconnect switch and the busbar. The setting of the hanging component greatly simplifies the connection method between the strip fuse disconnect switch and the busbar. After hanging, only one component, the fastening member, needs to be adjusted, and the installation is very convenient, saving time and effort.

[0069] Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope claimed in the claims.

Claims

1. A bar-type fuse disconnect switch, characterized in that include: A base, a clamping plate, and at least one fuse unit disposed in the base and the clamping plate, each fuse unit comprising: A handle bracket assembly, comprising a bracket and a handle arranged on the bracket, wherein the bracket is rotatably connected to the clamping plate; The fuse is detachably connected to the inner wall of the bracket to move in conjunction with the handle; A contact assembly is arranged in the base opposite to the fuse, and the contact assembly includes a contact and an inlet and outlet terminal electrically connected to the contact and extending toward the bottom of the base, and the fuse electrode is closed or disconnected with the contact; The hanging assembly includes a clamping bracket, a hanging body and a fastener. The hanging body is detachably connected to the base through the clamping bracket. The hanging body is hung on the busbar and the inlet and outlet terminals are opposite to the busbar. The fastener locks the hanging body and the inlet and outlet terminals to the busbar. Wherein, each fuse unit also includes a test locking assembly, which includes an insulating connector and a locking member, the insulating connector passes through the handle bracket and contacts the contact, the locking member is arranged at the bottom end of the insulating connector and has a locking position and an unlocking position, and the width of the locking member is smaller than the width of the fuse electrode; when conducting a short-time withstand current test, the locking member is located in the locking position, the locking member is engaged with the locking mating portion on the contact, and the fuse electrode is locked in the contact for conducting a short-time withstand current test; in normal use, the insulating connector drives the locking member to move to the unlocking position, and the locking member slides out of the locking mating portion on the contact.

2. The strip fuse disconnecting switch according to claim 1, characterized in that, The clamping bracket includes a clamping body, elastic clamping parts arranged on both sides of the clamping body, and two claw buckles arranged at the ends of the clamping body. The clamping body is clamped in the base through the elastic clamping parts, and the two claw buckles grasp the input and output wire ends.

3. The strip fuse disconnecting switch according to claim 2, characterized in that, The elastic locking part is two locking walls arranged on both sides of the locking body. A deformation cavity is formed between the locking wall and the locking body to allow the locking wall to undergo elastic deformation. A limiting groove is provided on the outer surface of the locking wall, and a limiting protrusion matching the limiting groove is provided on the inner wall of the base.

4. The strip fuse disconnecting switch according to claim 1, wherein Each fuse unit also includes an arc extinguishing assembly arranged in the clamping plate, the arc extinguishing assembly includes an arc extinguishing grid and an arc isolating plate, the arc extinguishing grid is opposite to the fuse core, and the arc isolating plate is detachably arranged on the side of the arc extinguishing grid away from the fuse core.

5. The strip fuse disconnecting switch according to claim 4, characterized in that, The arc isolation plate comprises an arc isolation plate body and a hanging ear arranged on the top of the arc isolation plate body and extending out of the clamping plate, the hanging ear is provided with a locking hole, and the bracket is provided with a hanging ear through-hole. When the bracket is covered on the clamping plate, the hanging ear passes through the hanging ear through-hole on the bracket, and a padlock is hung on the locking hole to lock the arc isolation plate and the bracket.

6. The strip fuse disconnecting switch according to claim 4, characterized in that The arc isolation plate includes an arc isolation plate body, connecting parts arranged on both sides of the arc isolation plate body and an insertion part arranged on the back of the arc isolation plate body. The connecting part is provided with two insertion columns. The inner wall of the clamping plate is provided with two insertion holes matching with the insertion columns and a supporting part protruding toward the inside of the clamping plate is provided on one side of each insertion hole. The supporting part is provided with a slot, and the insertion part of the arc isolation plate can be detachably inserted into the slot.

7. The strip fuse disconnecting switch according to claim 6, characterized in that, The inserting portion comprises a horizontal inserting portion and a vertical reinforcing portion, and the slot is a horizontal slot facing the horizontal inserting portion.

8. The strip fuse disconnecting switch according to claim 1, characterized in that, Each of the fuse units further includes an outgoing line clamp, which includes a clamp plate, two elastic cards arranged on both sides of the clamp plate, and a hand-held portion arranged at both ends of the clamp plate and extending away from the clamping plate. The clamp plate is detachably clamped to the side wall of the clamping plate through the two elastic cards, and a plurality of wires are fixed to the side wall of the clamping plate.

9. An isolating switch group, characterized in that, Comprising: At least two strip fuse disconnect switches according to any one of claims 1 to 8, and at least one parallel connection member connecting two adjacent strip fuse disconnect switches.

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