Combined electric appliance

Abstract

The utility model provides a combined electric appliance, and belongs to the technical field of switch equipment. The combined electric appliance comprises a base frame with the transverse length direction, a circuit breaker is arranged on the base frame, at least one transverse side of the circuit breaker is connected with a current transformer, one transverse side, away from the circuit breaker, of the current transformer is connected with a switch, and the combined electric appliance further comprises a control cubicle arranged on one longitudinal side of the circuit breaker or the current transformer or the switch. The control cubicle is respectively in control connection with the circuit breaker, the current transformer and the switch, a support frame is fixed on the bottom frame, the control cubicle is supported and fixed on the support frame, and / or the control cubicle is fixedly connected to a shell flange of the circuit breaker or the current transformer or the switch through a connecting frame. The arrangement position of the control cubicle is changed, the transverse size of the bottom frame can be shortened, the length of the combined electric appliance is reduced, and transportation and on-site installation and arrangement are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to a combined electric appliance and belongs to the technical field of switch device. BACKGROUND

[0002] The combined electric appliance is an organic whole formed by combining various electrical devices in a transformer substation, such as GIS (gas insulated switchgear) and HGIS (hybrid gas insulated metal-enclosed switchgear), and generally comprises circuit breakers, disconnectors, grounding switches, current transformers, etc. For example, the combined electric appliance disclosed in the Chinese utility model patent with the announcement number CN203883326U comprises circuit breakers and current transformers connected to the left and right sides of the circuit breakers, respectively, wherein the current transformer on the left side is connected to an outgoing bushing and a quick grounding switch through a three-position switch, and the current transformer on the right side is connected to a disconnector and a three-position switch, and the disconnector and the three-position switch are respectively connected to busbars, which are arranged horizontally and at intervals.

[0003] The circuit breakers, busbars, three-position switches, etc. mentioned above are all arranged on the chassis, and a control and monitoring cabinet is further arranged at the rightmost side of the chassis, which is connected to the various devices (the control lines are generally routed through the chassis) for centralized control of the various devices, such as the state switching of the three-position switches, disconnectors and quick grounding switches; at the same time, the control and monitoring cabinet is also used for monitoring the operating states of the various components, such as the open-close positions of the switches, the pressure and density of SF6 gas, etc.; in addition, the control and monitoring cabinet is also used for transmitting the operating state information of the combined electric appliance to the monitoring system of the transformer substation, so that the operating conditions of the combined electric appliance can be remotely grasped by the operators, and of course, the control and monitoring cabinet can also receive control instructions from the monitoring system to realize remote operation.

[0004] However, since the combined electric appliance is a "slim and long" type of device, and the control and monitoring cabinet is arranged at the transverse end of the chassis, this results in a relatively long transverse dimension of the combined electric appliance and a relatively large length dimension of the chassis, which in turn leads to the need for occupying more length space during transportation and on-site installation and arrangement, and is inconvenient for transportation and on-site installation and arrangement. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a combined electric appliance to solve the problem that the control and monitoring cabinet is arranged at the transverse end of the chassis in the prior art, resulting in a relatively long transverse dimension of the combined electric appliance and a relatively large length dimension of the chassis, which in turn leads to inconvenience in transportation and on-site installation and arrangement.

[0006] To achieve the above-mentioned purpose, the combined electric appliance in the utility model adopts the following technical scheme:

[0007] The utility model provides a kind of combined electric appliance, including the chassis of length direction is transverse, be provided with circuit breaker on chassis, and the transverse at least one side of circuit breaker is connected with current transformer, and the transverse side of current transformer away from circuit breaker is connected with switch, combined electric appliance further include the control cabinet of being arranged in the longitudinal side of circuit breaker or current transformer or switch, control cabinet is controlled connection with circuit breaker, current transformer and switch respectively, support frame is fixed on chassis and control cabinet is supported and fixed on support frame, and / or control cabinet is fixedly connected on the shell flange of circuit breaker or current transformer or switch by connecting frame.

[0008] The beneficial effects of the above technical solution are that the utility model belongs to the invention and creation of element relationship change, mainly changes the setting position of the control cabinet, arranges the control cabinet on the longitudinal side of the circuit breaker or the current transformer or the switch, supports and fixes the control cabinet by the support frame fixed on the chassis, and / or fixes the control cabinet and the shell flange of the circuit breaker or the current transformer or the switch by the connecting frame, realizes the fixation of the control cabinet, and the control cabinet is no longer arranged on the transverse end of the chassis, so that the transverse size of the chassis can be saved, the length size of the combined electric appliance is reduced, transportation and on-site installation and arrangement are facilitated.

[0009] Further, the support frame is fixed on the chassis, and the support frame includes two inclined struts, the lower ends of the two inclined struts are fixed to the chassis, and the upper ends are fixed to the bottom surface of the control cabinet.

[0010] Further, the distance between the lower ends of the two inclined struts is greater than the distance between the upper ends.

[0011] Further, the lower ends of the two inclined struts are fixed to the side surface of the chassis.

[0012] Further, the upper and lower ends of the two inclined struts are respectively provided with fixing plates, the fixing plate at the upper end is fixedly connected to the bottom surface of the control cabinet by bolts, and the fixing plate at the lower end is fixedly connected to the chassis by bolts.

[0013] Further, the connecting frame is connected to the control cabinet, and the connecting frame includes two connecting beams, one end of each of the two connecting beams is fixed to the control cabinet, and the other end is respectively fixed to the shell flanges on the two transverse sides of the circuit breaker or the current transformer or the switch.

[0014] Further, the connecting frame is connected to the control cabinet, and the connecting point of the connecting frame and the shell flange is located in the upper middle part of the shell flange.

[0015] Further, the circuit breaker or the current transformer or the switch is provided with a wire slot extending in the transverse direction on the longitudinal side opposite to the switchgear cabinet, and a first branch slot is connected to the wire slot at a position corresponding to the switchgear cabinet.

[0016] Further, the circuit breaker is connected with a current transformer on each of the transverse sides, and a switch is connected to each of the current transformers away from the transverse side of the circuit breaker, the switchgear cabinet is located on the longitudinal side of one of the current transformers, a second branch slot is connected to the wire slot at a position corresponding to the other current transformer, and the second branch slot comprises a second vertical part extending downwardly in communication with the wire slot, a second horizontal part extending horizontally and longitudinally from below the current transformer in communication with the second vertical part, and a third horizontal part extending horizontally and transversely away from the circuit breaker in communication with the second horizontal part.

[0017] Further, the switchgear cabinet has a depth in the longitudinal direction greater than a depth in the transverse direction, and a cabinet door of the switchgear cabinet is arranged on the transverse side of the switchgear cabinet. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a front view of the combined electrical apparatus according to an embodiment of the present application;

[0019] Figure 2 is a front view of the combined electrical apparatus according to an embodiment of the present application; Figure 1

[0020] Figure 3 is a front view of the combined electrical apparatus according to an embodiment of the present application; Figure 1

[0021] Figure 4 is a top view of the position of the switchgear cabinet in the combined electrical apparatus according to an embodiment of the present application;

[0022] Figure 5 is a front view of the combined electrical apparatus according to an embodiment of the present application; Figure 1

[0023] In the drawing: 1, base frame; 2, circuit breaker; 3, current transformer; 4, isolation grounding switch; 5, fast grounding switch; 6, isolation switch; 7, switchgear cabinet; 7-1, cabinet door; 8, diagonal brace; 9, connecting beam; 10, wire slot; 11, first branch slot; 11-1, first vertical part; 11-2, first horizontal part; 12, second branch slot; 12-1, second vertical part; 12-2, second horizontal part; 12-3, third horizontal part; 13, first leg; 14, second leg; 15, third leg; 16, fourth leg. DETAILED DESCRIPTION ​​​

[0024] To address the technical problems existing in the prior art, the basic concept of this utility model is to change the installation position of the control cabinet, arrange the control cabinet on the longitudinal side of the circuit breaker, current transformer or switch, support and fix the control cabinet by the bottom support frame, and / or fix it to the housing flange of the circuit breaker, current transformer or switch by the connecting frame, thereby fixing the control cabinet, reducing the lateral length of the base frame and shortening the length of the combined electrical appliance.

[0025] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0026] Embodiment 1 of the combined electrical appliance in this utility model:

[0027] like Figure 1 As shown, the combined electrical appliance in this embodiment is an HGIS, which includes components whose length direction is transverse (i.e., Figure 1 The base frame 1 (in the left-right direction of the paper) is provided, and the circuit breaker 2 is installed on the base frame 1. The circuit breaker 2 is arranged vertically and has a support foot at the bottom, which is fixed to the base frame 1. Current transformers 3 are connected to the two sides of the circuit breaker 2 respectively. A switch is connected to the side of each current transformer 3 away from the circuit breaker 2. In this embodiment, the switches are all isolation grounding switches 4, and the isolation grounding switches 4 on both the left and right sides are also connected to fast grounding switches 5. Isolation switches 6 are connected to the upper and lower sides of the isolation grounding switch 4 on the right side respectively.

[0028] The combined electrical unit also includes a control cabinet 7. In this embodiment, the control cabinet 7 is located on the longitudinal side of the current transformer 3 on the right side, specifically in front of the current transformer 3. The control cabinet 7 is connected to the circuit breaker 2, the current transformer 3, the isolating grounding switch 4, the fast grounding switch 5, and the isolating switch 6 for control purposes. Figure 1 The layout of the control lines is shown in the diagram.

[0029] To secure the control cabinet 7, a support frame is fixed on the base frame 1, and the control cabinet 7 is supported and fixed on the support frame. At the same time, a connecting frame is fixed on the control cabinet 7, and the control cabinet 7 is fixedly connected to the housing flange of the current transformer 3 through the connecting frame to ensure the fixing effect.

[0030] Specifically in this embodiment, combined with Figure 1 , Figure 3 and Figure 4As shown, the support frame comprises two inclined braces 8, the lower ends of which are fixed to the base frame 1 and the upper ends of which are fixed to the bottom surface of the control cabinet 7. The inclined braces 8 can be made of angle steel or channel steel, which is convenient to obtain and process. The connection points of the two inclined braces 8 to the bottom surface of the control cabinet 7 are located in the middle of the longitudinal direction of the control cabinet 7, which ensures stable support. The lower ends of the two inclined braces 8 are fixed to the side surface of the base frame 1, which is more convenient to fix. Compared with being fixed to the top surface of the base frame 1, the angle between the inclined braces 8 and the horizontal plane is larger, and the support effect is better.

[0031] Further, in order to facilitate the fixing operation, a fixing plate is arranged at each of the upper and lower ends of the two inclined braces 8. The fixing plate at the upper end is attached to the bottom surface of the control cabinet 7 and is fixedly connected to the bottom surface of the control cabinet 7 by bolts. The fixing plate at the lower end is attached to the side surface of the base frame 1 and is fixedly connected to the base frame 1 by bolts. In addition, the distance between the lower ends of the two inclined braces 8 is greater than the distance between the upper ends, which makes the support more stable.

[0032] The connection frame fixed to the control cabinet 7 comprises left and right two connection beams 9. One end of each of the two connection beams 9 is fixed to the control cabinet 7, and the other end is fixed to the shell flanges on the transverse two sides of the current transformer 3. The connection beams 9 are inclined and extended. The connection points of the connection beams 9 to the shell flanges are located in the middle and upper part of the shell flanges. The connection points of the connection beams 9 to the control cabinet 7 are located in the upper part of the control cabinet 7 and are higher than the connection points of the connection beams 9 to the shell flanges. In this way, a kind of hanging installation effect is formed, which cooperates with the two inclined braces 8 below to achieve a better fixing effect.

[0033] The main part of the connection beam 9 can be made of angle steel or channel steel. A notch is formed at one end of the connection beam 9 to facilitate the attachment to the end surface of the shell flange and the fixation to the shell flange by bolts. A fixing plate is welded at the other end of the connection beam 9 to facilitate the attachment to the side surface of the control cabinet 7 and the fixed connection to the side surface of the control cabinet 7 by bolts. In fact, a shell flange is also arranged on the side of the circuit breaker 2 connected to the current transformer 3. The shell flange of the circuit breaker 2 is butted against the shell flange of the current transformer 3, and the two shell flanges are fixed by bolts. The bolts for fixing the connection beam 9 can pass through the original bolt holes of the shell flanges of the circuit breaker 2 and the current transformer 3, and then the nuts are connected. Alternatively, bolt holes can be additionally processed on the shell flanges of the circuit breaker 2 and the current transformer 3. Of course, a light hole can be additionally processed on the shell flange of the circuit breaker 2, and a threaded hole can be additionally processed on the shell flange of the current transformer 3. At this time, the bolt passes through the light hole of the shell flange of the circuit breaker 2 and the threaded hole of the shell flange of the current transformer 3 to be connected.

[0034] Due to the change of the position of the control cabinet 7, the wiring mode of the control lines between the control cabinet 7 and each device has also changed. In combination with Figure 1 , Figure 2 and Figure 3As shown, the longitudinal other side (i.e. rear side) of the right current transformer 3 away from the switch cabinet 7 is provided with a line slot 10 extending in the transverse direction, the line slot 10 is used for the wiring of the control lines, the left end of the line slot 10 extends to the position of the left current transformer 3, and the right end extends to the position of the right side isolation grounding switch 4, and the left and right ends of the line slot 10 are connected to the nearest shell flanges through fixing plates and bolts respectively.

[0035] Further, the position corresponding to the switch cabinet 7 on the line slot 10 is connected with a first branch slot 11, as shown in Figure 3 The first branch slot 11 includes a first vertical part 11-1 in communication with the line slot 10 and extending downward, and a first horizontal part 11-2 in communication with the first vertical part 11-1 and extending horizontally and longitudinally from the lower side of the current transformer 3 (i.e. extending forward), the first horizontal part 11-2 is located below the switch cabinet 7 and communicates with the inside of the switch cabinet 7, so that various control lines are connected into the switch cabinet 7.

[0036] In addition, the position corresponding to the left current transformer 3 on the line slot 10 is connected with a second branch slot 12, as shown in Figure 1 , Figure 2 and Figure 5 The second branch slot 12 includes a second vertical part 12-1 in communication with the line slot 10 and extending downward, a second horizontal part 12-2 in communication with the second vertical part 12-1 and extending horizontally and longitudinally from the lower side of the current transformer 3 (i.e. extending forward), and a third horizontal part 12-3 in communication with the second horizontal part 12-2 and extending horizontally away from the circuit breaker 2 (i.e. extending leftward), the left end of the third horizontal part 12-3 extends to the position of the left side isolation grounding switch 4, so that the control lines enter the line slot 10 through the second branch slot 12.

[0037] Specifically, the control lines of the left quick grounding switch 5, the isolation grounding switch 4 and the current transformer 3 all enter the second branch slot 12, and then enter the switch cabinet 7 through the line slot 10 and the first branch slot 11. The control lines of the circuit breaker 2, the right current transformer 3, the right upper side isolation grounding switch 6 and the right quick grounding switch 5 all enter the line slot 10, and then enter the switch cabinet 7 through the first branch slot 11. The control lines of the right side isolation grounding switch 4 and the right lower side isolation grounding switch 6 all directly enter the first branch slot 11, and then enter the switch cabinet 7. Since the switch cabinet 7 is not at the end of the chassis, each device is connected to the line slot 10 or the branch slot nearby, which simplifies the wiring layout and shortens the length of the control lines compared with the prior art.

[0038] In addition, as shown in Figure 1As shown, in order to ensure stable support for each device, a first supporting leg 13 is arranged between the left side isolation grounding switch 4 and the base frame 1, a second supporting leg 14 is arranged between the left side current transformer 3 and the base frame 1, a third supporting leg 15 is arranged between the right side current transformer 3 and the base frame 1, and a fourth supporting leg 16 is arranged between the right side lower side isolation switch 6 and the base frame 1, and each supporting leg is arranged in pairs, and the two supporting legs in each pair are arranged in an "eight" shape.

[0039] In addition, as shown in Figure 4 As shown, the depth of the control cabinet 7 in the longitudinal direction is greater than the depth in the transverse direction, and the cabinet door 7-1 of the control cabinet 7 is arranged on the transverse side of the control cabinet 7, and in the embodiment, the cabinet door 7-1 is arranged on the left side, so that the operation depth is slightly smaller when wiring or maintenance is performed, and the operation is facilitated.

[0040] In addition, as shown in Figure 1 As shown, the control cabinet 7 in the embodiment is arranged on the front side of the right side current transformer 3 and connected to the flanges of the housings on the left and right sides of the current transformer 3, which is because the front side of the right side current transformer 3 is not provided with other components and is more convenient for arranging the control cabinet 7, unlike the front side of the isolation grounding switch 4 which is provided with an operating mechanism and is originally protruding. In addition, the height of the right side current transformer 3 is relatively appropriate, which is higher than that of the left side current transformer 3 and matches the height of a person, so that the operator can conveniently operate the control cabinet 7 at this height.

[0041] In summary, the arrangement position of the control cabinet is changed in the utility model, the control cabinet is arranged on the longitudinal side of the current transformer instead of the end of the base frame, and stable support and fixation of the control cabinet are realized through the bottom supporting frame and the upper connecting frame, the transverse size of the base frame is shortened, the length of the combined electric appliance can be reduced, the length space is reduced, and transportation and on-site installation and arrangement are facilitated.

[0042] In other embodiments of the combined electric appliance: the combined electric appliance can also be a GIS.

[0043] In other embodiments of the combined electric appliance: when the depth of the control cabinet in the longitudinal direction is greater than the depth in the transverse direction, the cabinet door of the control cabinet can also be arranged on the right side of the control cabinet, and of course, the cabinet door of the control cabinet can be arranged forward regardless of whether the depth of the control cabinet in the longitudinal direction is greater than the depth in the transverse direction, and if the control cabinet is arranged on the rear side of the current transformer, the cabinet door of the control cabinet is arranged backward.

[0044] In other embodiments of the combined electric appliance: the second branch groove can not be arranged, and in this case, the left end of the wire groove directly extends to the position of the left side isolation grounding switch, and in this case, the control lines of the left side quick grounding switch, the isolation grounding switch and the current transformer directly enter the wire groove.

[0045] In other embodiments of the combined electrical apparatus: neither the second branch groove nor the first branch groove can be provided, at this time the control lines of each device directly enter the wire groove, and the wire hole is opened at the position closest to the control cabinet in the wire groove, and various control lines come out of the wire hole and then enter the control cabinet, at this time the exposed part of the control line is more.

[0046] In other embodiments of the combined electrical apparatus: neither the second branch groove nor the first branch groove can be provided, at this time the control lines of each device directly enter the wire groove, and the wire hole is opened at the position closest to the control cabinet in the wire groove, and various control lines come out of the wire hole and then enter the control cabinet, at this time the exposed part of the control line is more.

[0047] In other embodiments of the combined electrical apparatus: the connecting frame can only include one connecting beam at this time, the connecting frame is fixedly connected with the flange of one side of the shell, of course, the connecting frame can also be a whole frame structure, at this time the connecting frame is still fixedly connected with the flanges of both sides of the shell.

[0048] In other embodiments of the combined electrical apparatus: the connecting point of the connecting frame and the flange of the shell can also be located in the middle or lower middle part of the flange of the shell.

[0049] In other embodiments of the combined electrical apparatus: the upper and lower ends of the two inclined supports can not be provided with fixed plates, at this time the upper end of the inclined support is directly welded and fixed with the bottom surface of the control cabinet, and the lower end of the inclined support is directly welded and fixed with the bottom frame.

[0050] In other embodiments of the combined electrical apparatus: the lower end of the two inclined supports can also be fixed with the top surface of the bottom frame.

[0051] In other embodiments of the combined electrical apparatus: the distance between the lower ends of the two inclined supports can be equal to the distance between the upper ends.

[0052] In other embodiments of the combined electrical apparatus: the support frame can be a whole frame structure, the upper end of the frame structure is fixed with the bottom surface of the control cabinet, and the lower end is fixed with the bottom frame.

[0053] In other embodiments of the combined electrical apparatus: only the support frame below the control cabinet can be provided to support and fix the control cabinet, and the upper connecting frame is no longer provided.

[0054] In other embodiments of the combined electrical apparatus: only the upper connecting frame can be provided to fix the control cabinet on the flange of the shell, and the lower support frame is no longer provided.

[0055] In other embodiments of the combined electrical apparatus: when the operating mechanism of the isolated grounding switch is located at the rear side, the control cabinet can be arranged at the front side of the isolated grounding switch, and the control cabinet is fixed by the bottom support frame and / or the upper connecting frame, and if the connecting frame is provided, the connecting frame is fixedly connected with the shell flange of the isolated grounding switch.

[0056] In other embodiments of the combined electrical apparatus: the control cabinet can be arranged at the front side or the rear side of the circuit breaker, and the control cabinet is fixed by the bottom support frame and / or the upper connecting frame, and if the connecting frame is provided, the connecting frame is fixedly connected with the shell flange of the circuit breaker, and if the shell flanges on the left and right sides of the circuit breaker are not of the same height, the connecting frame is connected with only one of the shell flanges, and if the shell flanges on the left and right sides of the circuit breaker are of the same height, the connecting frame is connected with both of the shell flanges.

[0057] In other embodiments of the combined electrical apparatus: the isolated grounding switch directly connected with the current transformer can be replaced by an isolation switch, and when the operating mechanism of the isolation switch is located at the rear side, the control cabinet can be arranged at the front side of the isolation switch, and when the operating mechanism of the isolation switch is located at the front side, the control cabinet can be arranged at the rear side of the isolation switch.

[0058] In other embodiments of the combined electrical apparatus: the circuit breaker is connected with the current transformer only on one lateral side, and is directly connected with a switch such as an isolated grounding switch or an isolation switch on the other lateral side, and the control cabinet can be arranged on the longitudinal side of the circuit breaker or the current transformer or the switch, and the control cabinet is fixed by the bottom support frame and / or the upper connecting frame.

[0059] The above description is only a preferred embodiment of the present application, and is not used to limit the present application, and the patent protection scope of the present application is subject to the claims, and any equivalent structural changes made according to the content of the description and drawings of the present application should also be included in the protection scope of the present application.

Claims

1. A combination electrical appliance, characterized in that, The device includes a horizontally extending base frame on which a circuit breaker is mounted. At least one side of the circuit breaker is connected to a current transformer, and the side of the current transformer away from the circuit breaker is connected to a switch. The combined electrical appliance also includes a control cabinet located on the longitudinal side of the circuit breaker, current transformer, or switch. The control cabinet is connected to the circuit breaker, current transformer, and switch for control purposes. A support frame is fixed on the base frame, and the control cabinet is supported and fixed on the support frame. And / or the control cabinet is fixedly connected to the housing flange of the circuit breaker, current transformer, or switch via a connecting frame.

2. The combined electrical appliance according to claim 1, characterized in that, The support frame is fixed on the base frame. The support frame includes two diagonal braces. The lower ends of the two diagonal braces are fixed to the base frame, and the upper ends are fixed to the bottom surface of the control cabinet.

3. The combined electrical appliance according to claim 2, characterized in that, The distance between the lower ends of the two diagonal braces is greater than the distance between their upper ends.

4. The combined electrical appliance according to claim 2, characterized in that, The lower ends of both diagonal braces are fixed to the sides of the base frame.

5. The combined electrical appliance according to claim 2, characterized in that, The upper and lower ends of the two diagonal braces are respectively equipped with fixing plates. The upper fixing plate is fixedly connected to the bottom surface of the control cabinet by bolts, and the lower fixing plate is fixedly connected to the base frame by bolts.

6. The combined electrical appliance according to any one of claims 1 to 5, characterized in that, The control cabinet is connected to the aforementioned connecting frame, which includes two connecting beams. One end of each connecting beam is fixed to the control cabinet, and the other end is fixed to the housing flanges on both sides of the circuit breaker, current transformer, or switch.

7. The combined electrical appliance according to any one of claims 1 to 5, characterized in that, The control cabinet is connected to the aforementioned connecting frame, and the connection point between the connecting frame and the housing flange is located in the upper middle part of the housing flange.

8. The combined electrical appliance according to any one of claims 1 to 5, characterized in that, A horizontally extending cable trough is provided on the other side of the control cabinet opposite to the circuit breaker, current transformer, or switch. A first branch trough is connected to the cable trough at a position corresponding to the control cabinet. The first branch trough includes a first vertical portion that communicates with the cable trough and extends downward, and a first horizontal portion that communicates with the first vertical portion and extends horizontally longitudinally from below the current transformer or switch. The first horizontal portion is located below the control cabinet and communicates with the interior of the control cabinet.

9. The combined electrical appliance according to claim 8, characterized in that, Current transformers are connected to both sides of the circuit breaker. Switches are connected to the two current transformers on the side away from the circuit breaker. The control cabinet is located on the longitudinal side of one of the current transformers. A second branch slot is connected to the cable tray at the position corresponding to the other current transformer. The second branch slot includes a second vertical part that communicates with the cable tray and extends downward, a second horizontal part that communicates with the second vertical part and extends horizontally longitudinally from below the current transformer, and a third horizontal part that communicates with the second horizontal part and extends horizontally in the opposite direction to the circuit breaker.

10. The combined electrical appliance according to any one of claims 1 to 5, characterized in that, The control cabinet is deeper in the longitudinal direction than in the transverse direction, and the cabinet door is located on the transverse side of the control cabinet.

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