Pole-mounted vacuum switch-drop-out fuse combination switch
By designing a combination switch of pole-mounted vacuum switch and drop-out fuse, the rated current and fault current can be automatically interrupted, which solves the safety hazards and high costs of manual operation in the existing technology and improves the safety and reliability of the power grid.
Patent Information
- Application Number
- CN202520400973.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-10
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-03-10
AI Technical Summary
Existing drop-out fuses cannot automatically interrupt the rated current of a normal circuit, and manual operation poses safety hazards. Vacuum switches are expensive and have long fault current interruption times, which can lead to the escalation of accidents.
Design a pole-mounted vacuum switch-drop-out fuse combination switch. By connecting the vacuum switch and the drop-out fuse in series, three-phase linkage is achieved. The vacuum switch is responsible for interrupting the load current and closing the fault current, while the drop-out fuse is responsible for interrupting the overload current. Combined with current and voltage sensors, automatic control is implemented to avoid abnormal operation.
It enables automatic interruption of rated current and fault current, reduces the risk of manual operation, improves the safety and reliability of the power grid, reduces the possibility of accidents escalating, and lowers costs.
Smart Images
Figure CN223858079U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electrical switches, and more specifically, to a combination switch of pole-mounted vacuum switch and drop-out fuse. Background Technology
[0002] Figure 1 A schematic diagram of a typical existing drop-out fuse is shown below. Figure 1 As shown, in the prior art, it consists of a supporting insulator 1, a lower outgoing terminal 2, a lower conductive base 3, a fuse tube 4, an upper conductive base 5, and an upper outgoing terminal 6.
[0003] All components are mounted on the supporting insulator 1, forming a whole. The lower outgoing terminal 2 and the upper outgoing terminal 6 are the input and output terminals for the external circuit to the drop-out fuse. The fuse tube 4 is hung on the lower conductive base 3. The fuse tube 4 can rotate around the lower conductive base 3, so that the other contact of the fuse tube 4 is connected to the upper conductive base 5, so that the lower conductive base 3 and the upper conductive base 5 are connected through the fuse tube 4. When an overload current or fault current flows through the fuse tube 4, the fuse in the fuse tube 4 will melt and break the circuit, disconnecting the electrical connection between the lower conductive base 3 and the upper conductive base 5. Then the fuse tube 4 will detach from the upper conductive base 5 and rotate around the lower conductive base 3 and fall down, forming a complete disconnection between the lower conductive base 3 and the upper conductive base 5.
[0004] To restore power, the fuse tube 4 hanging on the lower conductive base 3 needs to be removed manually using an insulated rod. The fuse in the fuse tube 4 needs to be replaced. Then, the fuse tube 4 needs to be reattached to the lower conductive base 3. The fuse tube 4 needs to be rotated around the lower conductive base 3 and connected to the upper conductive base 5 manually using an insulated rod, thereby restoring the electrical connection between the lower conductive base 3 and the upper conductive base 5 and making the circuit conductive.
[0005] These drop-out fuses typically can only interrupt overload currents up to fault currents, but cannot interrupt the rated current of a normal circuit. Of course, some products now have arc-extinguishing devices added to the fuse tube, which can only interrupt small rated currents, reaching only tens of amperes, and the number of interruptions is also very limited, only a few dozen. On the other hand, existing drop-out fuses are all manually operated; personnel must operate them using an insulated rod beneath the fuse. If a fault current occurs during operation, it poses a safety hazard.
[0006] Figure 2a This is a schematic diagram of a typical existing column-mounted vacuum switch. Figure 2b for Figure 2a As shown in Figure 2, in the prior art, the pole-mounted vacuum switch includes an operating mechanism 01, an insulating operating rod 02, a supporting insulator 03, a conductive connection 04, a vacuum interrupter 05, a current transformer 06, a voltage sensor 07, an upper outgoing terminal 08, and a lower outgoing terminal 09.
[0007] The whole ground insulation is supported by the supporting insulator 03, when the operating mechanism 01 drives the insulating operating rod 02 to move up and down, thereby driving the moving contact in the vacuum interrupter 05 to move up and down, the contact or separation of the moving and static contacts in the vacuum interrupter 05 is formed, thereby forming the conduction and breaking of the circuit. The conductive connection 04 guarantees the electrical connection of the moving end of the vacuum interrupter 05 and the lower outgoing terminal 09, the electrical connection of the static end of the vacuum interrupter 05 and the upper outgoing terminal 08, and the current transformer 06 and the voltage sensor 07 are arranged for collecting circuit parameters.
[0008] The existing vacuum switch can detect the running state of the circuit and automatically or instructively open the rated current in the circuit to any current of the fault current. The deficiency is that the breaking time for the fault current is long, which often leads to the expansion of the accident and the increase of the loss, and the cost is high, which is the root cause that the current manual operation drop-out fuse cannot be eliminated. Practical new type content
[0009] The utility model provides a kind of pole-mounted vacuum switch-drop-out fuse combination switch to solve the problems existing in the prior art described above.
[0010] In order to achieve the above object, the utility model discloses a kind of pole-mounted vacuum switch-fall-out fuse combination switch, each phase of combination switch is by one phase vacuum switch and one phase fall-out fuse tube series connection, constitute one phase complete combination switch;Insulating operating lever, ground support insulating column, vacuum arc-extinguishing chamber electrically connected, vacuum arc-extinguishing chamber, current sensor, voltage sensor, outgoing terminal, ground insulating column reinforcing rib, fall-out fuse tube hanging shaft, fall-out fuse tube, fall-out fuse tube operating ring, interlocking baffle shaft, interlocking baffle are all assembled or glued on ground support insulating column, form complete one phase combination switch assembly;The upper portion of ground support insulating column has a box, three ground support insulating columns are installed on the box, operating mechanism is installed in the box, vacuum switch three-phase is driven to form three-phase linkage by one operating mechanism, fall-out fuse tube is three-phase separate phase operation.Vacuum switch plays the breaking of load current and the closing of load current until fault current;Fall-out fuse plays the breaking of overload current until fault current;If fall-out fuse is replaced by fall-out disconnecting switch, fall-out disconnecting switch can play electrical isolation effect, and fall-out fuse or fall-out disconnecting switch all have visible isolation breaking of pole-mounted combination switch.When combination switch is closed, fall-out fuse tube is closed first, then vacuum switch breaking is closed;When combination switch is opened, for the breaking of normal rated current, it is broken by vacuum switch breaking, and fall-out fuse tube is not moved;For abnormal overload current until fault current, it is automatically broken by fall-out fuse, and fall-out fuse tube falls to form isolation breaking, and then vacuum switch breaking decides whether to open according to need.The interlocking between vacuum switch and fall-out fuse tube of combination switch, vacuum switch has locking function for fall-out fuse tube;When vacuum switch is in open position, fall-out fuse tube is in unlocking state, and can be operated to open and close;When vacuum switch is in closed position, fall-out fuse tube is in locking state, and cannot be operated to open and close.
[0011] In an embodiment of the utility model, combination switch is three-phase integrated structure.
[0012] In an embodiment of the utility model, operating mechanism drives insulating operating lever in three-phase support insulating column to move up and down, so as to drive movable contact in vacuum arc-extinguishing chamber electrically connected, vacuum arc-extinguishing chamber to move horizontally left and right, realize the opening and closing operation of vacuum arc-extinguishing chamber, and current sensor, voltage sensor, outgoing terminal in it jointly constitute vacuum switch, so that one operating mechanism drives three-phase vacuum arc-extinguishing chamber to open and close by operating three-phase insulating operating lever, so this vacuum switch is three-phase linkage.
[0013] In an embodiment of the utility model, the opening and closing operation of fall-out fuse tube is operated by artificial push-pull operating ring to carry out separate phase operation.
[0014] In an embodiment of the utility model, by operating mechanism, insulating operating rod, vacuum arc-extinguishing chamber conductive connection, vacuum arc-extinguishing chamber, current sensor, voltage sensor, outgoing terminal constitute vacuum switch, the vacuum switch is vacuum circuit breaker or vacuum load switch.
[0015] In an embodiment of the utility model, the drop-out fuse tube is a spray type drop-out fuse tube, a current limiting fuse or a drop-out disconnector.
[0016] In an embodiment of the utility model, if the current sensor or / and voltage sensor detects that three-phase current or / and three-phase voltage is abnormal, then the current sensor or / and voltage sensor detection result is transmitted to the controller, so that the controller sends a signal to drive the vacuum switch to open, to avoid abnormal operation of the power grid. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.
[0018] Figure 1 It is a schematic diagram of the existing typical pole-mounted drop-out fuse;
[0019] Figure 2a It is a schematic diagram of the existing typical pole-mounted vacuum switch;
[0020] Figure 2b It is Figure 2a The perspective view of the utility model;
[0021] Figure 3 It is a pole-mounted vacuum switch-drop-out fuse combined switch in an embodiment of the utility model. DETAILED DESCRIPTION
[0022] The technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only some embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.
[0023] The utility model provides a kind of pole-mounted vacuum switch-fall-out fuse combination switch, every phase of combination switch is formed by one phase vacuum switch and one phase fall-out fuse tube series connection, constitute one phase complete combination switch;Insulation operating lever, ground support insulating column, vacuum arc-extinguishing chamber electrically connected, vacuum arc-extinguishing chamber, current sensor, voltage sensor, outgoing terminal, ground support insulating column reinforcing rib, fall-out fuse tube hanging shaft, fall-out fuse tube, fall-out fuse tube operating ring, interlocking baffle shaft, interlocking baffle are all assembled or glued on ground support insulating column, form complete one phase combination switch assembly;The upper portion of ground support insulating column has a box, three ground support insulating columns are installed on the box, operating mechanism is installed in the box, vacuum switch three-phase is driven to form three-phase linkage by one operating mechanism, and fall-out fuse tube is three-phase separate phase operation, and fall-out fuse or fall-out disconnecting switch can play visible isolation breaking point of pole-mounted combination switch.
[0024] Vacuum switch plays the breaking of load current and the closing of load current until fault current; fall-out fuse plays the breaking of overload current until fault current; if fall-out fuse is replaced by fall-out disconnecting switch, fall-out disconnecting switch can play electrical isolation effect, and fall-out fuse or fall-out disconnecting switch has visible isolation breaking point of pole-mounted combination switch.
[0025] When combination switch is closed, fall-out fuse tube is closed first, and then vacuum switch breaking point is closed;
[0026] When combination switch is opened, for the breaking of normal rated current, vacuum switch breaking point is broken, and fall-out fuse tube is not moved; for abnormal overload current until fault current, fall-out fuse is automatically fused and broken, and fall-out fuse tube falls to form isolation breaking point, and thereafter, whether vacuum switch breaking point is opened or not is decided according to need.
[0027] Combination switch has interlock between vacuum switch and fall-out fuse tube, and vacuum switch has locking function for fall-out fuse tube; when vacuum switch is in opening position, fall-out fuse tube is in unlocking state, and can be operated; when vacuum switch is in closing position, fall-out fuse tube is in locking state, and cannot be operated;
[0028] Figure 3 It is the schematic diagram of one embodiment of the utility model a kind of pole-mounted vacuum switch-fall-out fuse combination switch;The three-dimensional diagram of the case can be referred to as shown in Figure 2b Both structure and implementation are similar, and person skilled in the art can be understood according to Figure 2bThe structural form can obtain the perspective view of the case, not described here. The three-phase vacuum switch is driven by an operating mechanism 001, each phase of the combined switch includes an insulated operating rod 002, a ground support insulating column 003, a vacuum arc chamber conducting connection 004, a vacuum arc chamber 005, a current sensor 006, a voltage sensor 007, an outgoing terminal 008, a ground insulating column reinforcing rib 009, a drop-out fuse tube hanging shaft 010, a drop-out fuse tube 011, a drop-out fuse tube operating ring 012, a interlocking baffle shaft 013, and a interlocking baffle 014.
[0029] The upper part of the ground support insulating column 003 has a box A, three ground support insulating columns 003 are installed on the box A, the operating mechanism 001 is installed inside the box A, the insulated operating rod 002, the vacuum arc chamber conducting connection 004, the vacuum arc chamber 005, the current sensor 006, the voltage sensor 007, the outgoing terminal 008, the ground insulating column reinforcing rib 009, the drop-out fuse tube hanging shaft 010, the drop-out fuse tube 011, the drop-out fuse tube operating ring 012, the interlocking baffle shaft 013, and the interlocking baffle 014 are assembled or glued on the ground support insulating column 003 to form a complete one-phase assembly.
[0030] The operating mechanism 001 is located in the box in which the three-phase ground support insulating columns 003 are installed together; the operating mechanism 001 drives the insulated operating rod 002 in the three-phase ground support insulating columns 003 to move up and down, thereby driving the movable contact in the vacuum arc chamber conducting connection 004 and the vacuum arc chamber 005 to move horizontally left and right, realizing the opening and closing operation of the vacuum arc chamber 005, and the current sensor 006, the voltage sensor 007, and the outgoing terminal 008 together constitute the vacuum switch. In this way, one operating mechanism 001 drives three-phase vacuum arc chambers 005 to perform opening and closing operation through operating three-phase insulated operating rods 002, so this vacuum switch is three-phase linkage.
[0031] The ground insulating column reinforcing rib 009, the drop-out fuse tube hanging shaft 010, the drop-out fuse tube 011, the drop-out fuse tube operating ring 012, the interlocking baffle shaft 013, and the interlocking baffle 014 are assembled or glued on the ground support insulating column 003 to form a complete one-phase assembly. The opening and closing operation of the drop-out fuse tube is performed by manually pushing and pulling the operating ring 012.
[0032] There is an interlock between the vacuum interrupter and the drop-out fuse tube. The vacuum interrupter has a locking function for the drop-out fuse tube. When the vacuum interrupter 005 and the drop-out fuse tube 011 are in the closed position, the interlocking baffle shaft 013 rotates counterclockwise, causing the interlocking baffle 014 to block the operating ring 012 of the drop-out fuse tube. This prevents the operator from engaging the operating lever on the operating ring 012 of the drop-out fuse tube, and thus prevents the operator from opening the drop-out fuse tube 011. When the vacuum interrupter 005 is in the closed position, and the drop-out fuse tube 011 is in the open position... When the circuit breaker is in the open position, the interlocking baffle shaft 013 rotates counterclockwise, causing the interlocking baffle 014 to block the drop-out fuse tube from the closing position, thus preventing the operator from pushing the drop-out fuse tube to the closing position and thus preventing the operation of the drop-out fuse tube 011. When the vacuum interrupter chamber 005 is in the open state, the interlocking baffle shaft 013 rotates clockwise, causing the interlocking baffle 014 to release the obstruction of the drop-out fuse tube operating ring 012 and its position, allowing the operator to freely operate the drop-out fuse tube 011 for opening and closing operations through the drop-out fuse tube operating ring 012.
[0033] In this embodiment, a vacuum switch is composed of an operating mechanism 001, an insulating operating rod 002, a vacuum interrupter conductive connection 004, a vacuum interrupter 005, a current sensor 006, a voltage sensor 007, and an output terminal 008. This vacuum switch can be a vacuum circuit breaker or a vacuum load switch, etc.
[0034] In this embodiment, the drop-out fuse tube 011 can be a jet-type drop-out fuse tube, a current-limiting fuse, or a drop-out disconnect switch.
[0035] In this embodiment, if the current sensor 006 or (and) the voltage sensor 007 detects an abnormality in the three-phase current or (and) the three-phase voltage, the detection result of the current sensor 006 or (and) the voltage sensor 007 can be transmitted to the controller, so that the controller can send a signal to drive the vacuum switch to open, thereby avoiding abnormal operation of the power grid.
[0036] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of one embodiment, and the modules or processes shown in the drawings are not necessarily essential for implementing this utility model.
[0037] Those skilled in the art will understand that the modules in the apparatus of the embodiments can be distributed in the apparatus of the embodiments as described in the embodiments, or they can be located in one or more devices different from this embodiment with corresponding changes. The modules of the above embodiments can be combined into one module, or they can be further divided into multiple sub-modules.
[0038] It should be finally pointed out that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the present application examples.
Claims
1. A pole-mounted vacuum switch-drop-out fuse combination switch, characterized by, Each phase of the combined switch is formed by a phase vacuum switch and a phase drop-out fuse tube in series, constituting a complete phase combined switch; the insulation operating rod, the ground support insulating column, the vacuum arc-extinguishing chamber conducting connection, the vacuum arc-extinguishing chamber, the current sensor, the voltage sensor, the outgoing terminal, the ground support insulating column reinforcing rib, the drop-out fuse tube hanging shaft, the drop-out fuse tube, the drop-out fuse tube operating ring, the interlocking baffle shaft and the interlocking baffle are all assembled or glued on the ground support insulating column, forming a complete phase combined switch assembly; the ground support insulating column is provided with a box body above, the three ground support insulating columns are all installed on the box body, the operating mechanism is installed inside the box body, the three-phase vacuum arc-extinguishing chambers are driven by one operating mechanism to form three-phase linkage, the drop-out fuse tubes are operated in three separate phases, the vacuum switch serves to break the load current and close the load current up to the fault current; the drop-out fuse serves to break the overload current up to the fault current; if the drop-out fuse is replaced by a drop-out disconnector, the drop-out disconnector can serve as electrical isolation, and both the drop-out fuse and the drop-out disconnector have visible isolation breaking points of the pole-mounted combined switch; when the combined switch is closed, the drop-out fuse tube is closed first, and then the vacuum switch breaking point is closed; when the combined switch is opened, the normal rated current is broken by the vacuum switch breaking point, and the drop-out fuse tube is not moved; the abnormal overload current up to the fault current is automatically broken by the drop-out fuse, the drop-out fuse tube drops to form an isolation breaking point, and then the vacuum switch breaking point is determined whether to open according to the need, the vacuum switch and the drop-out fuse tube of the combined switch have interlocking, and the vacuum switch has a locking function for the drop-out fuse tube; when the vacuum switch is in the open position, the drop-out fuse tube is in the unlocked state and can be operated; when the vacuum switch is in the closed position, the drop-out fuse tube is in the locked state and cannot be operated.
2. The post vacuum switch-drop-out fuse combination switch according to claim 1, characterized in that, The combined switch is a three-phase integrated structure.
3. The post vacuum switch-drop-out fuse combination switch according to claim 1, wherein, The operating mechanism drives the insulation operating rod in the three-phase ground support insulating column to move up and down, thereby driving the movable contact in the vacuum arc-extinguishing chamber conducting connection and the vacuum arc-extinguishing chamber to move horizontally left and right, realizing the opening and closing operation of the vacuum arc-extinguishing chamber, and the current sensor, the voltage sensor and the outgoing terminal together constitute the vacuum switch, so that one operating mechanism drives three-phase vacuum arc-extinguishing chambers to open and close by operating three-phase insulation operating rods, and therefore the vacuum switch is three-phase linkage.
4. The post vacuum switch-drop-out fuse combination switch of claim 1 wherein, The opening and closing operation of the drop-out fuse tube is performed by manually pushing and pulling the operating ring for separate phase operation.
5. The post vacuum switch-drop-out fuse combination switch according to claim 1, wherein, The vacuum switch is composed of the operating mechanism, the insulation operating rod, the vacuum arc-extinguishing chamber conducting connection, the vacuum arc-extinguishing chamber, the current sensor, the voltage sensor and the outgoing terminal, and the vacuum switch is a vacuum circuit breaker or a vacuum load switch.
6. The post vacuum switch-drop-out fuse combination switch according to claim 1, wherein, The drop-out fuse tube is a spray type drop-out fuse tube, a current limiting fuse or a drop-out disconnector.
7. The post vacuum switch-drop-out fuse combination switch according to claim 1, wherein, If the current sensor or / and the voltage sensor detects abnormal three-phase current or / and three-phase voltage, the detection result of the current sensor or / and the voltage sensor is transmitted to the controller, so that the controller sends a signal to drive the vacuum switch to open, thereby avoiding abnormal operation of the power grid.