A load switch-fuse combination electrical apparatus

Abstract

The present application relates to the technical fields of high-voltage electrical equipment, and particularly relates to a load switch-fuse combined electrical appliance. The load switch-fuse combined electrical appliance comprises: a fixing frame; a load switch; a spring operating mechanism for controlling the opening and closing operations of the load switch, comprising an energy storage motor for driving the closing spring to store energy; a fuse; a mechanical tripping mechanism arranged between the fuse and the load switch, which drives the spring operating mechanism to operate when the fuse is ejected by the ejector pin; the combined electrical appliance further comprises: a control switch for controlling the disconnection of the power supply line where the energy storage motor is located; a trigger arranged opposite to the control switch; one of the control switch and the trigger is installed on the mechanical tripping mechanism, and the other is installed on the fixing frame, which drives the trigger to act relative to the control switch when the mechanical tripping mechanism controls the load switch to open, so as to trigger the control switch and disconnect the power supply line where the energy storage motor is located.

Description

Technical Field

[0001] This invention relates to the field of high-voltage electrical equipment technology, and specifically to a load switch-fuse combination appliance. Background Technology

[0002] Power systems place high demands on the safety and reliability of equipment; therefore, interlocking devices are widely used in many fields, including mechanical and electrical engineering. A load switch-fuse combination appliance is a switchgear that uses a load switch for control and a fuse for protection. When a short-circuit current occurs, the fuse drives the load switch to trip, causing it to open. Specifically, as shown in Chinese Utility Model Patent No. CN206179757U, a load switch-fuse combination appliance is disclosed. This appliance includes a fixed frame, a tripping unit (i.e., a load switch), a disconnecting switch, a grounding switch, and a fuse. The load switch and fuse are connected in series. It also includes a spring operating mechanism that drives the load switch to trip or close. A mechanical tripping mechanism is also provided, specifically including a push plate located at the fuse's pin. The push plate is connected to the tripping half-shaft (i.e., the opening half-shaft) of the spring operating mechanism via a series of linkages. When in use, when a short-circuit current occurs, the fuse's pin strikes the push plate. After a series of transmissions, the push plate drives the trip half-shaft to rotate, releasing the trip spring and causing the load switch to trip.

[0003] Existing load switch-fuse combination devices can drive the load switch to trip and disconnect the transmission line in the event of a short-circuit current. However, it is known that after the load switch's spring operating mechanism trips, the motor automatically drives the energy storage spring to store energy. Upon receiving a closing signal, the energy storage spring releases, causing the moving contact of the load switch to engage with the stationary contact, thus placing the load switch in the closed position. The problem arising from this is that when a short-circuit current occurs, the fuse drives the load switch to trip. However, after tripping, the motor causes the energy storage spring to re-store energy, posing a risk that the energy storage spring will again drive the load switch to close, threatening the personal safety of operators. Furthermore, secondary closing of the transmission line can easily affect electrical appliances on the transmission line. Summary of the Invention

[0004] The purpose of this invention is to provide a load switch-fuse combination electrical appliance to solve the technical problem in the prior art where the risk of reclosing after the load switch is opened poses a threat to the personal safety of operators.

[0005] To achieve the above objectives, the technical solution of the load switch-fuse combination electrical appliance of the present invention is: a load switch-fuse combination electrical appliance, comprising:

[0006] Fixture;

[0007] Load switch;

[0008] A spring operating mechanism is used to control the opening and closing operations of a load switch, including an energy storage motor that drives the closing spring to store energy.

[0009] Fuse;

[0010] The mechanical tripping mechanism is arranged between the fuse and the load switch. When the pin of the fuse is pushed out, the mechanical tripping mechanism drives the spring operating mechanism to perform the tripping operation.

[0011] Combined electrical appliances also include:

[0012] The control switch is used to disconnect the power supply line to the energy storage motor.

[0013] The trigger element is arranged opposite to the control switch;

[0014] One of the control switch and the trigger is mounted on the mechanical tripping mechanism, and the other is mounted on the fixed frame. When the mechanical tripping mechanism controls the load switch to open, the trigger moves relative to the control switch to trigger the control switch and disconnect the power supply line to the energy storage motor.

[0015] The beneficial effects of this invention are as follows: By setting a control switch and a trigger, when the load switch is opened by the mechanical tripping mechanism, the power supply line of the energy storage motor can be disconnected, preventing the energy storage motor from driving the closing spring to store energy again. This avoids the risk of the combined electrical appliance reclosing, improves the safety of the combined electrical appliance, and effectively protects the electrical appliances on the transmission line. Moreover, in this invention, the trigger is arranged on the mechanical tripping mechanism, eliminating the need for a separate power source and transmission mechanism to drive the trigger. New functions are achieved using the existing mechanism, resulting in lower costs and a simpler structure.

[0016] Furthermore, the spring-operated mechanism has a tripping half-shaft, and the mechanical tripping mechanism includes a tripping connecting shaft arranged on one side of the tripping half-shaft. The tripping connecting shaft is rotatably mounted on a fixed frame, and one end of the tripping connecting shaft is connected to the tripping half-shaft via a tripping linkage. The tripping connecting shaft can be rotated by being pushed by the fuse's ejector pin. The trigger element is fixed at the end of the tripping connecting shaft where the tripping linkage is located, and the control switch is fixed on the fixed frame at a position corresponding to the trigger element. Arranging the tripping linkage and the trigger element on the same side of the tripping connecting shaft saves space.

[0017] Furthermore, the end of the tripping connecting shaft is provided with a screw hole, and the trigger element is connected to the screw hole of the tripping connecting shaft. The trigger element is installed by screwing, which is convenient for installation.

[0018] Furthermore, the control switch is a mechanically triggered control switch. The trigger point of the control switch is arranged on one side of the control switch perpendicular to the axis of the tripping connection shaft. The trigger element is an L-shaped plate, one side of which is connected to the tripping connection shaft, and the other side is parallel to the axis of the tripping connection shaft and is used to press against the trigger point of the control switch. The fact that one side of the trigger element is parallel to the axis of the tripping connection shaft allows for better pressing contact with the trigger point perpendicular to the axis of the tripping connection shaft.

[0019] Furthermore, the control switch is detachably mounted on the mounting bracket via a control switch mounting plate. The detachable connection of the control switch facilitates replacement and position adjustment.

[0020] Furthermore, the control switch is connected in series in the power supply line of the energy storage motor.

[0021] Furthermore, the combined electrical appliance includes a three-phase load switch and a load switch shaft that simultaneously drives the three-phase load switch, as well as a three-phase grounding switch and a grounding switch shaft that simultaneously drives the three-phase grounding switch. The mechanical tripping mechanism is located at the end of the fuse where the grounding switch shaft is located. Of the two ends of the fuse, the end with the load switch has more components and less space, while the end with the grounding switch has fewer components and more space. Placing the mechanical tripping mechanism at the end with the grounding switch makes better use of space and is also more convenient to install.

[0022] Furthermore, the spring-operated mechanism includes a tripping half-shaft, and the mechanical tripping mechanism includes a tripping connecting shaft arranged on one side of the tripping half-shaft. The tripping half-shaft and the tripping connecting shaft extend in parallel, and the tripping connecting shaft is rotatably mounted on a fixed frame. One end of the tripping connecting shaft is connected to the tripping half-shaft via a tripping linkage. The tripping connecting shaft can be rotated by being pushed by the fuse's ejector pin. The mechanical tripping mechanism also includes a torsion spring for resetting the tripping connecting shaft and the tripping linkage. The torsion spring is sleeved on the tripping connecting shaft, and its two ends press against the tripping connecting shaft and the fixed frame, respectively. With the torsion spring installed, the mechanism can automatically reset after replacing parts without manual operation, making it more convenient.

[0023] Furthermore, the mechanical tripping mechanism includes a tripping connecting plate sleeved on the tripping half-shaft. The tripping connecting plate is L-shaped, with one side for connecting to a tripping connecting rod. This side has an elongated hole through which the tripping connecting rod passes. The tripping connecting rod passes through this side of the tripping connecting plate, and its end has a tripping pusher for pushing the tripping connecting plate to perform a tripping operation. The elongated hole in the tripping connecting plate guides the tripping connecting rod.

[0024] Furthermore, a limiting stop is also provided on the opposite side of the tripping link corresponding to the tripping plate on the tripping linkage. There is a gap between the tripping pusher and the limiting stop to allow relative movement between the tripping plate and the tripping link. The limiting stop prevents the tripping plate from disengaging from the tripping link during normal use as it rotates with the tripping half-shaft, and also prevents the tripping half-shaft from driving the mechanical tripping mechanism and triggering the control switch. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of an embodiment of the load switch-fuse combination electrical appliance of the present invention;

[0026] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0027] Figure 3 This is a schematic diagram showing the cooperation between the mechanical tripping mechanism and the tripping half-shaft in an embodiment of the load switch-fuse combination electrical appliance of the present invention;

[0028] Figure 4 This is a schematic diagram of the mechanical tripping mechanism in an embodiment of the load switch-fuse combination appliance of the present invention (the tripping connecting plate is not shown in the figure).

[0029] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0030] Figure 6 for Figure 3 Assembly diagram of the middle trip half shaft and trip connecting plate;

[0031] Figure 7 for Figure 3 Assembly diagram of the middle trip half shaft, trip connecting plate and trip connecting rod;

[0032] Figure 8 for Figure 3 A schematic diagram of the tripping push plate component;

[0033] Figure 9 This is a schematic diagram of the cooperation between the fuse and the tripping push plate component in an embodiment of the load switch-fuse combination electrical appliance of the present invention;

[0034] Explanation of reference numerals in the attached diagram: 1-Fixed frame; 2-Grounding switch; 3-Mechanical tripping mechanism; 4-Fuse; 5-Load switch; 6-Load switch shaft; 7-Disconnecting switch; 8-Spring operating mechanism; 9-Grounding switch shaft; 10-Trip push plate assembly; 11-Insulating connecting rod; 12-Trip connecting shaft; 13-Trip connecting rod; 14-Trip half-shaft; 15-Trip half-shaft sleeve; 16-Trip half-shaft torsion spring; 17-Opening switch Plate; 18-Trigger connecting plate; 19-Trigger connecting shaft sleeve; 20-Trigger connecting rod crank arm; 21-Trigger connecting shaft torsion spring; 22-Trigger push plate mounting plate; 23-Trigger push plate; 24-Pin shaft; 25-Insulating connecting rod crank arm; 26-Magnetic blow switch pressure plate; 27-Magnetic blow switch mounting plate; 28-Magnetic blow switch; 29-First nut; 30-Second nut; 31-Fuse catch; 32-Ejector pin; 33-Trigger connecting shaft crank arm. Detailed Implementation

[0035] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0036] The load switch-fuse combination appliance of the present invention can achieve mechanical and electrical double interlocking. When an abnormal situation such as a short circuit current occurs in the transmission line, the pin of the fuse extends and puts the load switch in the open position. At the same time, it can disconnect the energy storage motor of the spring operating mechanism to prevent energy storage and re-closing.

[0037] One embodiment of a load switch-fuse combination appliance, such as Figures 1 to 9 As shown, the load switch-fuse combination appliance is referred to as the combination appliance.

[0038] like Figure 1 As shown, the combined electrical appliance includes a mounting frame 1, on which a three-phase load switch 5, a three-phase grounding switch 2, and a three-phase disconnecting switch 7 are mounted. Correspondingly, operating mechanisms are also arranged, including a grounding switch operating mechanism for controlling the opening and closing of the grounding switch 2, which includes a grounding switch shaft 9 that controls the opening and closing of the three-phase grounding switch 2. The operating mechanism also includes a disconnecting switch operating mechanism for controlling the opening and closing of the three-phase disconnecting switch 7. The operating mechanism also includes a spring operating mechanism 8 for controlling the opening and closing of the three-phase load switch 5, which includes a load switch shaft 6 that controls the opening and closing of the three-phase load switch. The combined electrical appliance also includes a three-phase fuse 4, which is connected in series with the load switch 5, and the other end of the fuse 4 is used for outgoing lines. Figure 1 As can be seen, the load switch shaft 6 and the grounding switch shaft 9 extend in parallel. The above content is from the prior art and will not be elaborated further here.

[0039] To ensure that the load switch 5 can quickly trip after the fuse 4 blows, this invention incorporates both mechanical tripping and electrical interlocking. For example... Figure 3 and Figure 4 The mechanical tripping mechanism 3 is shown. The mechanical tripping mechanism 3 includes a tripping push plate component 10 and a tripping connecting shaft 12 rotatably mounted on a fixed frame 1. The tripping push plate component 10 and the tripping connecting shaft 12 are connected by an insulating connecting rod 11. A tripping connecting rod 13 is connected to the tripping connecting shaft 12. During assembly and use, the tripping push plate component 10 corresponds to the fuse 4, and the tripping connecting rod 13 is connected to the tripping half-shaft 14.

[0040] Among them, such as Figure 6 and Figure 7 This demonstrates how the tripping linkage 13 is connected to the tripping half-shaft 14. The tripping half-shaft 14 has a built-in release plate 17, which is used to be pushed by a manual button or electromagnet. During normal operation, the release plate 17 drives the tripping half-shaft 14 to perform a tripping operation. The tripping half-shaft 14 is mounted on the fixed frame 1 via a tripping half-shaft sleeve 15. A tripping half-shaft torsion spring 16 is located between the tripping half-shaft 14 and the fixed frame 1 to achieve automatic reset of the tripping half-shaft 14. The mechanical tripping mechanism 3 includes a tripping linkage 18 fixedly mounted on the other end of the tripping half-shaft 14. Figure 6 and Figure 7 As can be seen, the tripping plate 18 is an L-shaped plate with two sides. One side is fixedly fitted onto the tripping half-shaft 14, and the other side has an elongated hole for the tripping linkage 13 to pass through. Figure 7 As shown, the tripping linkage 13 passes through one side of the tripping half-shaft 14. A first nut 29 and a second nut 30 are fixed to the tripping linkage 13, located on opposite sides of one side of the tripping connecting plate 18. Figure 7 It can be seen that there are two of each nut: the first nut 29 and the second nut 30. One is a stop nut, and the other is a back nut. There is a large distance between the first nut 29 and the second nut 30, which allows the tripping linkage 13 to move relative to the tripping plate 18.

[0041] The connection method between the tripping linkage 13 and the tripping connecting shaft 12 is as follows: Figure 5 As shown, a tripping linkage crank arm 20 is fixedly mounted on the tripping connecting shaft 12, and the tripping linkage 13 is hinged to the end of the tripping linkage crank arm 20.

[0042] The structure of the trip push plate component 10 and its positional relationship with the fuse 4 are as follows: Figure 8 and Figure 9 As shown, the trip push plate assembly 10 includes a trip push plate mounting plate 22, which is mounted on the fixed frame 1 by bolts. The trip push plate mounting plate 22 has two parallel arms, and a pin 24 is rotatably mounted in the two arms. A trip push plate 23 and an insulating connecting rod crank arm 25 are respectively fixed on the pin 24. Figure 3 and Figure 4As shown, the insulating connecting rod crank arm 25 is hinged to one end of the insulating connecting rod 11 during assembly, while the other end of the insulating connecting rod 11 is hinged to a trip connecting shaft crank arm 33, which is fixed to the trip connecting shaft 12. Figure 9 As shown, after installation, the trip push plate 23 corresponds to the pin 32 of the fuse 4, and the fuse 4 is fixed to the load switch 5 by the fuse clip 31. When the fuse 4 blows, the pin 32 pushes the trip push plate 23 to swing.

[0043] The combined electrical appliance can be used normally after the parts are replaced. In order to reset the mechanical tripping mechanism 3, such as... Figure 4 As shown, a tripping connecting shaft torsion spring 21 is fitted onto the tripping connecting shaft 12, and the other end of the tripping connecting shaft torsion spring 21 is respectively abutted against or fixed to the tripping connecting shaft 12 and the fixing frame 1. A tripping connecting shaft sleeve 19 is fitted onto the other end of the tripping connecting shaft 12, and is rotatably mounted on the fixing frame 1 through the tripping connecting shaft sleeve 19.

[0044] The mechanical tripping mechanism 3 of this invention operates as follows: During normal opening and closing operations of the load switch 5, the push pin 32 retracts, and the tripping half-shaft 14 in the spring operating mechanism 8 of the load switch 5 rotates normally to trip. When a short-circuit current occurs in the transmission line, the fuse 4 melts, causing the push pin 32 to extend. The push pin 32 pushes the tripping push plate 23 to rotate. The tripping push plate 23 drives the insulating connecting rod crank arm 25 to swing via the pin shaft 24. The insulating connecting rod crank arm 25 drives the insulating connecting rod 11 to move horizontally. The insulating connecting rod 11 drives the tripping connecting shaft 12 to rotate via the tripping connecting shaft crank arm 33. The rotation of the tripping connecting shaft 12 drives the tripping connecting rod 13 to move in the direction of the tripping half-shaft 14. The first nut 29 on the tripping connecting rod 13 pushes the tripping connecting plate 18, causing the tripping connecting plate 18 to drive the tripping half-shaft 14 to rotate, thus achieving tripping. The tripping connecting shaft torsion spring 21 and the tripping half-shaft torsion spring 16 can reset each component.

[0045] In this invention, in addition to the mechanical tripping mechanism 3, an electrical interlocking component is also provided. For example... Figure 2 As shown, a magnetic blow-out switch 28 is installed on the mounting bracket 1, and the magnetic blow-out switch 28 is fixedly installed on the mounting bracket 1 via a magnetic blow-out switch mounting plate 27. Figure 1 and Figure 6As can be seen, the magnetic blow-out switch 28 and the tripping connecting plate 18 are actually arranged on both sides of the fixing frame 1, and the magnetic blow-out switch 28 is arranged at the same height as the tripping connecting shaft 12. The magnetic blow-out switch 28 is a normally closed switch, connected in series in the power supply line of the energy storage motor. Under normal use, it can be considered that the magnetic blow-out switch 28 is a closed circuit and will not affect the power supply line. The magnetic blow-out switch 28 has elastic contacts, which are located on one side of the tripping connecting shaft 12. In order to ensure that the load switch 5 can control the disconnection of the power supply line of the energy storage motor after tripping and to prevent the closing spring from storing energy again, a magnetic blow-out switch pressure plate 26 is installed at one end of the tripping connecting shaft 12. Specifically, a threaded hole is opened at one end of the tripping connecting shaft 12, and the magnetic blow-out switch pressure plate 26 is fixed to the tripping connecting shaft 12 with screws. Figure 2 As shown, in order to better trigger the elastic contacts of the top-pressure magnetic blow switch 28, the magnetic blow switch pressure plate 26 is designed as an L-shaped plate, with one side fixed on the trip connection shaft 12 and the other side extending along the arrangement direction of multiple elastic contacts, which can trigger multiple elastic contacts at the same time.

[0046] The use of the mechanical tripping mechanism 3 has been described above. During normal use, the tripping connecting shaft torsion spring 21 keeps the magnetic blow-out switch pressure plate 26 separated from the magnetic blow-out switch 28. Simultaneously, the tripping connecting shaft 12 drives the tripping linkage 13, causing the magnetic blow-out switch pressure plate 26 to rotate and press against the magnetic blow-out switch 28. This disconnects the power supply line to the energy storage motor controlled by the magnetic blow-out switch 28, preventing the energy storage motor from re-energizing the closing spring and avoiding a secondary closing. Simultaneously, the tripping connecting shaft torsion spring 21 can also separate the magnetic blow-out switch pressure plate 26 from the magnetic blow-out switch 28 again.

[0047] In this embodiment, the first nut 29 is used to push the tripping connecting plate 18 to form a tripping pusher, and the second nut 30 is used to prevent the tripping connecting plate 18 from dislodging from the tripping connecting rod 13 to form a limiting stop. There is a certain gap between the tripping pusher and the limiting stop to prevent the tripping connecting plate 18 from being clamped, and at the same time to prevent the tripping half shaft 14 from driving the mechanical tripping mechanism to move during normal opening and closing operations, thereby triggering the magnetic blow-out switch 28. In other embodiments, the structure of the tripping pusher and the limiting stop can be changed according to the actual situation, for example, a fixing block fixed to the tripping connecting rod can be used.

[0048] In this embodiment, the mechanical tripping mechanism is arranged on the side where the grounding switch is located. In other embodiments, the mechanical tripping mechanism can be arranged on the side where the load switch is located.

[0049] In this embodiment, the magnetic blow switch pressure plate 26 actually constitutes the trigger element that triggers the magnetic blow switch 28 to disconnect. The magnetic blow switch pressure plate 26 is an L-shaped plate, which can better utilize one side of the L-shaped plate to press and trigger the magnetic blow switch.

[0050] In this embodiment, the magnetic blow-out switch 28 is connected in series in the power supply line of the energy storage motor. The magnetic blow-out switch 28 is a normally closed switch, which disconnects the power supply line when triggered. Its essence is to control the disconnection of the power supply line. Based on this principle, the magnetic blow-out switch 28 is actually a control switch. However, the control switch does not necessarily have to be connected in series in the power supply line of the energy storage motor. It can also control the disconnection of the power supply line by controlling an existing switch in the power supply line. For example, when the control switch is triggered, it sends a signal to the switch on the power supply line or the energy storage motor to disconnect the power supply line. There are many ways to use a control switch. It can be a common limit switch without magnetic blow-out function, or a common mechanical trigger switch. Alternatively, the control switch can also be a non-contact switch. For example, the control switch can be designed as a proximity switch. When the triggering element approaches the proximity switch, the proximity switch is triggered and sends a disconnection signal to the power supply line. In this case, the form of the triggering element depends on the type of control switch.

[0051] Of course, in the above embodiments, the control switch is arranged on the fixed frame and the trigger is arranged on the mechanical tripping mechanism. In other embodiments, the positions of the two can be interchanged.

[0052] In this embodiment, the trigger is installed in a screw hole provided on the tripping connecting shaft, which simplifies the structure. In other embodiments, the trigger can be mounted entirely on the tripping connecting shaft in a manner similar to a crank arm.

[0053] In other embodiments, the installation position of the trigger on the tripping connection shaft can be changed according to the actual situation. After the position of the trigger is changed, the control switch can be changed accordingly.

[0054] In this embodiment, the trigger is mounted on the tripping connecting shaft. In other embodiments, one of the trigger and the control switch can be mounted on the tripping linkage or at the tripping push plate component, and the position of the other trigger and control switch can be changed accordingly. That is, one of the trigger and the control switch is mounted on the mechanical tripping mechanism, and the position is not limited, as long as the insulation and installation requirements are met.

[0055] It should be noted that the overall concept of this invention is that the mechanical tripping and electrical control prevent the energy storage motor from rotating. Based on this concept, the specific structural form of the mechanical tripping mechanism can be changed according to the actual situation, such as adopting the mechanical tripping mechanism in the background art.

Claims

1. A load switch-fuse combination electrical appliance, comprising: Fixture; Load switch; A spring operating mechanism is used to control the opening and closing operations of a load switch, including an energy storage motor that drives the closing spring to store energy. Fuse; The mechanical tripping mechanism is arranged between the fuse and the load switch. When the pin of the fuse is pushed out, the mechanical tripping mechanism drives the spring operating mechanism to perform the tripping operation. Its characteristic is that the combined electrical appliance also includes: The control switch is used to disconnect the power supply line to the energy storage motor. The trigger element is arranged opposite to the control switch; One of the control switch and the trigger is mounted on the mechanical tripping mechanism, and the other is mounted on the fixed frame. When the mechanical tripping mechanism controls the load switch to open, it drives the trigger to move relative to the control switch, thereby triggering the control switch and simultaneously controlling the power supply line of the energy storage motor to disconnect, preventing the energy storage motor from driving the closing spring to store energy again.

2. The load switch-fuse combination appliance according to claim 1, characterized in that: The spring operating mechanism has a tripping half-shaft, and the mechanical tripping mechanism includes a tripping connecting shaft arranged on one side of the tripping half-shaft. The tripping connecting shaft is rotatably mounted on the fixed frame. One end of the tripping connecting shaft is connected to the tripping half-shaft through a tripping linkage. The tripping connecting shaft can be rotated by being pushed by the pin of the fuse. The trigger element is fixed at the end of the tripping connecting shaft where the tripping linkage is located. The control switch is fixed on the fixed frame at the position corresponding to the trigger element.

3. The load switch-fuse combination appliance according to claim 2, characterized in that: The end of the tripping connecting shaft is provided with a screw hole, and the trigger is connected in the screw hole of the tripping connecting shaft.

4. The load switch-fuse combination appliance according to claim 3, characterized in that: The control switch is a mechanically triggered control switch. The trigger point of the control switch is arranged on one side of the control switch perpendicular to the axis of the trip connection shaft. The trigger element is an L-shaped plate. One side of the L-shaped plate is connected to the trip connection shaft, and the other side is parallel to the axis of the trip connection shaft and is used to press against the trigger point of the control switch.

5. The load switch-fuse combination appliance according to any one of claims 2-4, characterized in that: The control switch is detachably mounted on the mounting bracket via a control switch mounting plate.

6. The load switch-fuse combination appliance according to any one of claims 1-4, characterized in that: The control switch is connected in series in the power supply line of the energy storage motor.

7. The load switch-fuse combination appliance according to any one of claims 1-4, characterized in that: The combined electrical appliance includes a three-phase load switch and a load switch shaft that simultaneously drives the three-phase load switch, as well as a three-phase grounding switch and a grounding switch shaft that simultaneously drives the three-phase grounding switch. The mechanical tripping mechanism is arranged at the end of the fuse where the grounding switch shaft is located.

8. The load switch-fuse combination appliance according to claim 1, characterized in that: The spring operating mechanism has a tripping half shaft. The mechanical tripping mechanism includes a tripping connecting shaft arranged on one side of the tripping half shaft. The tripping half shaft and the tripping connecting shaft extend in parallel. The tripping connecting shaft is rotatably mounted on the fixed frame. One end of the tripping connecting shaft is connected to the tripping half shaft through a tripping linkage. The tripping connecting shaft can be rotated by being pushed by the pin of the fuse. The mechanical tripping mechanism also includes a torsion spring for resetting the tripping connecting shaft and the tripping linkage. The torsion spring is sleeved on the tripping connecting shaft and its two ends press against the tripping connecting shaft and the fixed frame, respectively.

9. The load switch-fuse combination appliance according to claim 8, characterized in that: The mechanical tripping mechanism includes a tripping connecting plate that is sleeved on the tripping half shaft. The tripping connecting plate is an L-shaped piece. One of the bent edges of the tripping connecting plate is used to connect with the tripping connecting rod. The bent edge is provided with an elongated hole for the tripping connecting rod to pass through. The tripping connecting rod passes through the bent edge of the tripping connecting plate, and its end is provided with a tripping pusher for pushing the tripping connecting plate to perform the tripping operation.

10. The load switch-fuse combination appliance according to claim 9, characterized in that: A limiting stop is provided on the side opposite to the side where the tripping pusher is located on the bent edge of the tripping connecting plate. There is a gap between the tripping pusher and the limiting stop so that the tripping connecting plate and the tripping connecting rod can move relative to each other.

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