A control system for a drop-out fuse

Abstract

The present invention discloses a control system for a drop-out fuse, which includes a processing module, a closing module, a tripping module, a closing detection module, and a power meter on-off module. The closing module receives a closing instruction from the processing module, so that the closing module drives the drop-out fuse to perform a closing operation, thereby enabling the moving contact of the fuse tube to contact and combine with the static contact of the arc extinguishing cover, and further enabling the high-voltage line to be conducted with the electrical equipment. The control system for a drop-out fuse disclosed by the present invention automatically trips and closes the drop-out fuse through the tripping module and the closing module, and judges whether the closing of the drop-out fuse is in place through the closing detection module, and has the advantages of convenient use, high safety, and stable structure, etc.

Description

Technical Field

[0001] The present invention belongs to the technical field of drop fuses, and particularly relates to a control system for a drop fuse. Background Art

[0002] A fuse is an overcurrent protection electrical appliance. It is widely used in high and low voltage power distribution systems, control systems, and electrical equipment as a protector against short circuits or overcurrents. When the current exceeds the specified value, it melts the fuse element with the heat generated by itself to disconnect the circuit. Among them, an electric drop fuse is an outdoor high-voltage protector, which is assembled on the high-voltage side of a distribution transformer or on a distribution line pole line, and is used for short-circuit, overload protection, and switching of combined current of the transformer and the line. It is connected in series in the protected circuit. When the circuit or the equipment in the circuit is overloaded or fails, the fuse heats up and melts, thereby cutting off the circuit to achieve the purpose of protecting the circuit or equipment.

[0003] A high-voltage drop fuse installed between the high-voltage line and the transformer of the power grid facilitates the maintenance and repair of the transformer equipment and the line or the need for power restriction. An ordinary high-voltage drop fuse generally consists of a high-voltage porcelain insulator, a fuse tube, and a high-voltage switch wiring. One end of the fuse tube is movably connected to the high-voltage switch wiring of the porcelain insulator, and the other end is connected to the porcelain insulator through a fuse movable hook ring. When opening or closing the switch, a special high-voltage insulating rod needs to be used to manually push up or pull down. During operation, the operator needs to wear insulating boots and insulating gloves, and the operation is relatively troublesome and prone to safety accidents. Especially when operating in bad weather such as rain, it is very easy to cause personal safety accidents.

[0004] The utility model patent with the publication number of 208637377U and the patent name of: Electric Drop Fuse realizes unmanned automatic opening and closing of the fuse tube through a driving motor, thereby solving the safety hazards brought by manual operation. However, it cannot conduct the watt-hour meter during closing to detect the power consumption of the electrical equipment, and it cannot know whether the closing is in place during closing. If the moving contact and the static contact cannot be closed in place, the fuse is likely to fall off, thereby affecting the on-off and bringing safety hazards.

[0005] Therefore, in view of the above problems, further improvements are made. Summary of the Invention

[0006] The main object of the present invention is to provide a control system for a drop fuse, which automatically opens and closes the drop fuse through a tripping module and a closing module, and judges whether the closing of the drop fuse is in place through a closing detection module. It has the advantages of convenient use, high safety, and stable structure.

[0007] Another object of the present invention is to provide a control system for a drop-out fuse. The system determines whether the current drop-out fuse is closed through a closing detection module and a processing module. If it is closed, a closing instruction is transmitted to the power meter on-off module, so that the relay of the power meter on-off module is braked, thereby disconnecting the branch originally supplying power to the power meter, so that the power meter only detects the power consumption of the electrical equipment. If it is open, the processing module transmits an opening instruction to the power meter on-off module, so that the branch originally supplying power to the power meter is continuously conducted to maintain the basic power consumption requirements of the power meter. It has the advantages of high detection accuracy, stable structure and high safety.

[0008] To achieve the above object, the present invention provides a control system for a drop-out fuse, which is used to control the drop-out fuse and includes a processing module, a closing module, an opening module, a closing detection module and a power meter on-off module, wherein:

[0009] The closing module receives a closing instruction from the processing module, so that the closing module drives the drop-out fuse to perform a closing action, so that the moving contact of the fuse tube contacts and combines with the static contact of the arc extinguishing cover (and in place), and further makes the high-voltage line conduct with the electrical equipment (closing state);

[0010] The opening module receives an opening instruction from the processing module, so that the opening module drives the drop-out fuse to perform an opening action, so that the moving contact of the fuse tube separates from the static contact of the arc extinguishing cover, and further makes the high-voltage line disconnect from the electrical equipment (opening state);

[0011] The closing detection module includes a primary closing detection unit and a secondary closing detection unit. The primary closing detection unit preliminarily detects the closing action of the closing module and transmits the generated primary detection signal to the processing module to determine whether the moving contact and the static contact are in contact and combined for the first time. The secondary closing detection unit re-detects the closing action of the closing module and transmits the generated secondary detection signal to the processing module to determine whether the moving contact and the static contact are in contact and combined in place for the second time;

[0012] The processing module transmits a switching instruction generated according to the closing and opening states of the drop-out fuse to the power meter on-off module, so that the power meter on-off module performs a switching action on the power meter for detecting the electrical equipment (mainly power consumption) according to the switching instruction, and further makes the power meter accurately detect the power consumption data of the electrical equipment.

[0013] As a further preferred technical solution of the above technical solution, the primary closing detection unit includes a voltage sampling sub-unit and a signal conditioning sub-unit, wherein:

[0014] The voltage sampling sub-unit is used to collect the voltage at the detection end of the drop-out fuse (preferably at the moving contact), so as to transmit the detected voltage sampling data to the signal conditioning sub-unit, and then the signal conditioning sub-unit processes the voltage sampling data (primary detection signal) and transmits it to the processing module. The processing module analyzes the voltage sampling data to determine whether the moving contact and the static contact are in contact (if there is voltage, it means that the high-voltage line and the electrical equipment are already conducting, and if there is no conduction, no voltage can be detected). Among them:

[0015] If the voltage sampling data reaches the voltage threshold and lasts for a preset detection period, it means that the moving contact and the static contact are in contact, and thus the initial closing is successful;

[0016] If the voltage sampling data is 0, it means that the moving contact and the static contact are not in contact, and thus the initial closing is not successful.

[0017] As a further preferred technical solution of the above technical solution, the secondary closing detection unit includes a triggering sub-unit. The triggering sub-unit detects the position of the moving contact relative to the static contact and outputs different triggering instructions (the primary closing detection unit only judges whether the moving contact and the static contact are in contact, but cannot judge whether they are in place). Among them:

[0018] If during the closing operation, the moving contact reaches the in-place position relative to the static contact, the triggering sub-unit is triggered for the first time and transmits the generated first triggering instruction to the processing module, so that the processing module judges that the current closing is in place;

[0019] If during the closing operation, the moving contact does not reach the in-place position relative to the static contact (generally, the moving contact cannot reach the preset in-place position, for example, the moving contact is at half the distance. In the case of not being in place, it is not stable and cannot make the static contact stabilize the moving contact, which has a certain potential safety hazard), the triggering sub-unit is triggered for the second time and transmits the generated second triggering instruction to the processing module, so that the processing module judges that the current closing is not in place.

[0020] As a further preferred technical solution of the above technical solution, the drop-out fuse control system further includes a closing auxiliary module. The closing auxiliary module includes a first closing auxiliary unit and a second closing auxiliary unit. Among them:

[0021] When the processing module determines that the initial closing of the drop-out fuse is unsuccessful, it transmits the generated first auxiliary instruction to the first closing auxiliary unit, so that the first closing auxiliary unit assists in pushing the fuse tube, enabling the moving contact to contact the static contact. Then, the primary closing detection unit detects again. If the processing module determines through the primary closing detection unit that the initial closing of the current drop-out fuse is successful, it cancels the first auxiliary instruction; otherwise, the first closing auxiliary unit periodically assists in pushing the fuse tube within a preset auxiliary period until the processing module determines that the initial closing of the current drop-out fuse is successful (the first closing auxiliary unit is installed at one end of the fuse tube away from the high-voltage porcelain pot and is provided with a first pushing end and a first auxiliary motor. When receiving the first auxiliary instruction, the first auxiliary motor operates, causing the first pushing end to act on the fuse tube and push the fuse tube upward for auxiliary closing. When the first auxiliary instruction is cancelled, the first auxiliary motor operates in the reverse direction, causing the first pushing end to return to its original position).

[0022] When the processing module determines that the closing of the drop-out fuse is not in place, it transmits the generated second auxiliary instruction to the second closing auxiliary unit, so that the second closing auxiliary unit assists in pushing the fuse tube, enabling the moving contact to reach the in-place position relative to the static contact. Then, the secondary closing detection unit detects again. If the processing module determines through the secondary closing detection unit that the closing of the current drop-out fuse is in place, it cancels the second auxiliary instruction; otherwise, the second closing auxiliary unit periodically assists in pushing the fuse tube within a preset auxiliary period until the processing module determines that the closing of the current drop-out fuse is in place (the second closing auxiliary unit is installed around the static contact. If the second closing auxiliary unit is to be used, it means that the moving contact has already contacted the static contact, but the position is not in place. Therefore, it can be installed around the static contact. It is provided with a second pushing end and a second auxiliary motor. When receiving the second auxiliary instruction, the second auxiliary motor operates, causing the second pushing end to act on the fuse tube (preferably around the moving contact) and push the fuse tube in the forward closing direction for auxiliary closing. When the second auxiliary instruction is cancelled, the second auxiliary motor operates in the reverse direction, causing the second pushing end to return to its original position).

[0023] As a further preferred technical solution of the above technical solution, when the processing module determines that the drop-out fuse is in the closed state, it transmits the generated conduction instruction to the power meter on-off module, so that the switch of the power meter on-off module performs a first action, thereby cutting off the power supply branch that provides basic power supply to the power meter in the open state, and further enabling the power meter to accurately detect only the power consumption data of the current electrical equipment;

[0024] When the processing module determines that the drop-out fuse is in the open state, it transmits the generated conduction instruction to the electricity meter on-off module, so that the switch of the electricity meter on-off module performs a second action, thereby continuously conducting the power supply branch that provides basic power supply to the electricity meter in the open state, and further continuously maintaining the basic power supply of the electricity meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of a drop-out fuse control system of the present invention.

[0026] Figure 2 is a structural diagram of the drop-out fuse of the drop-out fuse control system of the present invention.

[0027] The reference numerals include: 10, drop-out fuse; 11, fuse tube; 111, moving contact; 12, extinguishing cover; 121, static contact; 3, swing arm; 14, push-pull rod; 15, drive motor; 16, drive gear; 17, drive rod; 18, pin shaft. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles defined in the following description can be applied to other implementation schemes, variant schemes, improvement schemes, equivalent schemes, and other technical schemes that do not depart from the spirit and scope of the present invention.

[0029] In the preferred embodiment of the present invention, those skilled in the art should note that the drop-out fuses, high-voltage lines, electrical equipment, etc. involved in the present invention can be regarded as the prior art.

[0030] Preferred embodiment.

[0031] The present invention discloses a drop-out fuse control system for controlling a drop-out fuse, including a processing module, a closing module, a tripping module, a closing detection module, and an electricity meter on-off module, wherein:

[0032] The closing module receives a closing instruction from the processing module, so that the closing module drives the drop-out fuse to perform a closing action, thereby making the moving contact of the fuse tube contact and combine (and in place) with the static contact of the arc extinguishing cover, and further making the high-voltage line conduct with the electrical equipment (closing state);

[0033] The tripping module receives a tripping instruction from the processing module, so that the tripping module drives the drop-out fuse to perform a tripping action, thereby making the moving contact of the fuse tube separate from the static contact of the arc extinguishing cover, and further making the high-voltage line disconnect from the electrical equipment (tripping state);

[0034] The closing detection module includes a primary closing detection unit and a secondary closing detection unit. The primary closing detection unit preliminarily detects the closing action of the closing module and transmits the generated primary detection signal to the processing module to initially determine whether the moving contact and the static contact are in contact and combined. The secondary closing detection unit re-detects the closing action of the closing module and transmits the generated secondary detection signal to the processing module to secondarily determine whether the moving contact and the static contact are in contact and combined in place;

[0035] The processing module transmits the generated on-off command to the electricity meter on-off module according to the closing and opening states of the drop-out fuse, so that the electricity meter on-off module performs on-off actions on the electricity meter for detecting the electrical equipment (mainly the electricity consumption), and further enables the electricity meter to accurately detect the electricity consumption data of the electrical equipment.

[0036] Specifically, the primary closing detection unit includes a voltage sampling sub-unit and a signal conditioning sub-unit, where:

[0037] The voltage sampling sub-unit is used to collect the voltage at the detection end of the drop-out fuse (preferably at the moving contact), so that the collected voltage data is transmitted to the signal conditioning sub-unit, and further the signal conditioning sub-unit processes the voltage data (primary detection signal) and transmits it to the processing module. The processing module analyzes the voltage data to determine whether the moving contact and the static contact are in contact and combined (if there is voltage, it means that the high-voltage line and the electrical equipment are already conducting, and if not, no voltage can be detected). Among them:

[0038] If the voltage data reaches the voltage threshold and lasts for a preset detection period, it indicates that the moving contact and the static contact are in contact and combined, and thus the primary closing is successful;

[0039] If the voltage data is 0, it indicates that the moving contact and the static contact are not in contact and combined, and thus the primary closing is unsuccessful.

[0040] More specifically, the secondary closing detection unit includes a trigger sub-unit. The trigger sub-unit detects the position of the moving contact relative to the static contact and outputs different trigger commands (the primary closing detection unit only determines whether the moving contact and the static contact are in contact, but cannot determine whether they are in contact in place). Among them:

[0041] If, during the closing action, the moving contact reaches the in-place position relative to the static contact, the trigger sub-unit is triggered for the first time and transmits the generated first trigger command to the processing module, so that the processing module determines that the current closing is in place;

[0042] If, during the closing operation, the moving contact does not reach the in-place position relative to the static contact (generally, the moving contact fails to reach the preset in-place position. For example, the moving contact is at half the distance and is unstable in the non-in-place situation, unable to make the static contact stabilize the moving contact, presenting a certain safety hazard), then the triggering subunit is triggered for the second time, and the generated second trigger instruction is transmitted to the processing module, so that the processing module determines that the current closing is not in place.

[0043] Furthermore, the fuse cutout control system further includes a closing assist module, and the closing assist module includes a first closing assist unit and a second closing assist unit, where:

[0044] When the processing module determines that the initial closing of the fuse cutout is unsuccessful, it transmits the generated first assist instruction to the first closing assist unit, so that the first closing assist unit performs an auxiliary push on the fuse tube, thereby enabling the moving contact to contact the static contact. Then, the primary closing detection unit detects again. If the processing module determines through the primary closing detection unit that the current initial closing of the fuse cutout is successful, the first assist instruction is withdrawn; otherwise, the first closing assist unit performs an intermittent auxiliary push on the fuse tube within a preset assist period until the processing module determines that the current initial closing of the fuse cutout is successful (the first closing assist unit is installed at one end of the fuse tube away from the high-voltage porcelain pot and is provided with a first push end and a first assist motor. When receiving the first assist instruction, the first assist motor operates, causing the first push end to act on the fuse tube and push the fuse tube upward for auxiliary closing. When the first assist instruction is withdrawn, the first assist motor operates in the reverse direction, causing the first push end to return to its original position).

[0045] When the processing module determines that the closing of the fuse cutout is not in place, it transmits the generated second assist instruction to the second closing assist unit, so that the second closing assist unit performs an auxiliary push on the fuse tube, thereby enabling the moving contact to reach the in-place position relative to the static contact. Then, the secondary closing detection unit detects again. If the processing module determines through the secondary closing detection unit that the current closing of the fuse cutout is in place, the second assist instruction is withdrawn; otherwise, the second closing assist unit performs an intermittent auxiliary push on the fuse tube within a preset assist period until the processing module determines that the current closing of the fuse cutout is in place (the second closing assist unit is installed around the static contact. If the second closing assist unit is to be used, it indicates that the moving contact has already contacted the static contact, but the position is not in place. Therefore, it can be installed around the static contact. It is provided with a second push end and a second assist motor. When receiving the second assist instruction, the second assist motor operates, causing the second push end to act on the fuse tube (preferably around the moving contact) and push the fuse tube in the forward closing direction for auxiliary closing. When the second assist instruction is withdrawn, the second assist motor operates in the reverse direction, causing the second push end to return to its original position).

[0046] Furthermore, when the processing module determines that the drop-out fuse is in the closed state, the generated conduction instruction is transmitted to the power meter on-off module, so that the switch of the power meter on-off module performs a first action, thereby cutting off the power supply branch that provides basic power supply to the power meter in the open state, and further enabling the power meter to only accurately detect the power consumption data of the current electrical equipment;

[0047] When the processing module determines that the drop-out fuse is in the open state, the generated conduction instruction is transmitted to the power meter on-off module, so that the switch of the power meter on-off module performs a second action, thereby continuously conducting the power supply branch that provides basic power supply to the power meter in the open state, and further maintaining the basic power supply of the power meter.

[0048] Preferably, the principle of the present invention is as follows:

[0049] As Figure 2 shown, the automatic drop-out fuse includes a fuse tube 11, an arc extinguishing cover 12, a swing arm 13, a push-pull rod 14, a driving motor 15, a driving gear 16 and a driving rod 17. Conventionally (the traditional drop-out fuse does not have driving components such as a driving motor), the fuse tube is manually pushed upward with the pin shaft 18 as the rotation point from bottom to top, so that the moving contact 111 of the fuse tube 11 touches the static contact 121 of the arc extinguishing cover 12, thereby completing the closing action. When opening, the moving contact is separated from the static contact;

[0050] In order to reduce potential safety hazards and automatically achieve opening and closing, the opening and closing control system of the present invention is generally located in the control cabinet, and the control cabinet is located beside the drop-out fuse, so as to perform wired opening and closing of the drop-out fuse. Since there are three wires in the high-voltage line, a drop-out fuse needs to be installed on each wire, and the three are used in combination to cooperate with the three phases of the high-voltage circuit;

[0051] When closing is required, after the processing module receives the closing instruction (which can be in the form of a button), the closing instruction is output to the three relays of the closing module. Each relay corresponds to a driving motor, so that each driving motor rotates forward, so that the driving gear of the driving motor rotates, and then drives the driving rod to move obliquely upward, and then drives the push-pull rod. The push-pull rod drives the fuse tube to rotate coaxially around the pin shaft until the moving contact is combined with the static contact, thereby realizing the closing operation of the 3 drop-out fuses;

[0052] The first closing detection unit: When the moving contact and the static contact come into contact, a circuit is formed, and the high-voltage line is connected to the electrical equipment. Then, voltage can be detected in the circuit. In the present invention, it is preferably sampled by the voltage sampling sub-unit at the place where the moving contact closes. The three voltage sampling sub-units respectively correspond to the three phases of the high-voltage line. The input end of the transformer is connected to the sampling end, and then the collected voltage is processed by the signal conditioning sub-unit and transmitted to the processing module. Then, at the processing module, it is judged whether there is a voltage signal. If there is, it is judged that the preliminary closing is successful; otherwise, the closing is unsuccessful.

[0053] The second closing detection unit: Although a voltage signal is detected and it is judged that the preliminary closing is successful, it cannot be judged whether the closing is in place. It is possible that there is only a slight contact, but the closing is not in place firmly. Therefore, a trigger sub-unit can be installed at the static contact. The trigger sub-unit detects the position of the moving contact relative to the static contact and outputs different trigger instructions, and then it is judged whether the closing is in place.

[0054] Regarding the on-off of the electricity meter: When closing is required, after the processing module receives a closing instruction (which can be in the form of a button), the closing instruction is output to the three relays of the closing electric module. Each relay corresponds to a driving motor, so that each driving motor rotates forward, causing the driving gear of the driving motor to rotate, and then driving the driving rod to move obliquely upward, and then driving the push-pull rod. The push-pull rod drives the fuse tube to rotate coaxially around the pin shaft until the moving contact and the static contact are combined, thus realizing the closing operation of the 3 drop-out fuses.

[0055] If the closing is successful, the processing module transmits a conduction instruction to the electricity meter on-off module to cut off the branch that originally supplied power to the electricity meter (because in the open state, the electricity meter also needs to be powered to maintain its basic power consumption requirements. If the original power supply is not disconnected during closing, the electricity meter will not accurately detect the power consumption of the electrical equipment). Thus, the electricity meter only detects the path from the high-voltage line to the electrical equipment and obtains the power supply demand through this path, and finally the electricity meter accurately detects the power consumption of the electrical equipment.

[0056] Similarly, during opening, the processing module cannot detect the voltage signal from the signal conditioning sub-unit, so it is judged that the current drop-out fuse is in the open state. Then, the path from the high-voltage line to the electrical equipment is disconnected. Therefore, it is necessary to reconnect the branch that originally supplied power to the electricity meter to meet the basic power consumption of the electricity meter, so that the branch that originally supplied power to the electricity meter is conducted.

[0057] It is worth mentioning that technical features such as the drop-out fuse, high-voltage line, and electrical equipment involved in this invention patent application should be regarded as the prior art. For the specific structures, working principles, control methods, and spatial arrangement methods that may be involved in these technical features, conventional selections in the art can be adopted, and they should not be regarded as the invention points of this invention patent. This invention patent will not be further specifically elaborated.

[0058] For those skilled in the art, it is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A drop-out fuse control system for controlling a drop-out fuse, characterized in that, It includes a processing module, a closing module, a tripping module, a closing detection module, and a power meter on-off module, where: The closing module receives a closing instruction from the processing module, so that the closing module drives the drop-out fuse to perform a closing operation, thereby making the moving contact of the fuse tube contact and combine with the static contact of the arc extinguishing cover, and further making the high-voltage line conduct with the electrical equipment; The tripping module receives a tripping instruction from the processing module, so that the tripping module drives the drop-out fuse to perform a tripping operation, thereby making the moving contact of the fuse tube separate from the static contact of the arc extinguishing cover, and further disconnecting the high-voltage line from the electrical equipment; The closing detection module includes a primary closing detection unit and a secondary closing detection unit. The primary closing detection unit preliminarily detects the closing operation of the closing module and transmits the generated primary detection signal to the processing module to determine whether the moving contact and the static contact are in contact and combined for the first time. The secondary closing detection unit re-detects the closing operation of the closing module and transmits the generated secondary detection signal to the processing module to determine whether the moving contact and the static contact are in contact and combined in place for the second time; The primary closing detection unit includes a voltage sampling sub-unit and a signal conditioning sub-unit, where: The voltage sampling sub-unit is used to collect the voltage at the detection end of the drop-out fuse, so that the collected voltage data is transmitted to the signal conditioning sub-unit, and then the signal conditioning sub-unit processes the voltage data and transmits it to the processing module. The processing module analyzes the voltage data to determine whether the moving contact and the static contact are in contact and combined, where: If the voltage data reaches the voltage threshold and lasts for a preset detection period, it indicates that the moving contact and the static contact are in contact and combined, and the primary closing is successful; If the voltage data is 0, it indicates that the moving contact and the static contact are not in contact and combined, and the primary closing is unsuccessful; The secondary closing detection unit includes a trigger sub-unit, which detects the position of the moving contact relative to the static contact and outputs different trigger instructions, where: If during the closing operation, the moving contact reaches the in-place position relative to the static contact, the trigger sub-unit is triggered for the first time and transmits the generated first trigger instruction to the processing module, so that the processing module determines that the current closing is in place; If during the closing operation, the moving contact does not reach the in-place position relative to the static contact, the trigger sub-unit is triggered for the second time and transmits the generated second trigger instruction to the processing module, so that the processing module determines that the current closing is not in place; The processing module transmits the generated on-off instruction to the power meter on-off module according to the closing and tripping states of the drop-out fuse, so that the power meter on-off module performs an on-off operation on the power meter of the detected electrical equipment according to the on-off instruction, and further enables the power meter to accurately detect the power consumption data of the electrical equipment; The drop-out fuse control system further includes a closing auxiliary module, and the closing auxiliary module includes a first closing auxiliary unit and a second closing auxiliary unit, where: When the processing module determines that the initial closing of the drop-out fuse is unsuccessful, it transmits the generated first auxiliary instruction to the first closing auxiliary unit, so that the first closing auxiliary unit assists in pushing the fuse tube, so that the moving contact contacts the static contact. Then, the primary closing detection unit detects again. If the processing module determines through the primary closing detection unit that the initial closing of the current drop-out fuse is successful, the first auxiliary instruction is removed. Otherwise, the first closing auxiliary unit periodically assists in pushing the fuse tube within a preset auxiliary period until the processing module determines that the initial closing of the current drop-out fuse is successful; When the processing module determines that the closing of the drop-out fuse is not in place, it transmits the generated second auxiliary instruction to the second closing auxiliary unit, so that the second closing auxiliary unit assists in pushing the fuse tube, so that the moving contact reaches the in-place position relative to the static contact. Then, the secondary closing detection unit detects again. If the processing module determines through the secondary closing detection unit that the closing of the current drop-out fuse is in place, the second auxiliary instruction is removed. Otherwise, the second closing auxiliary unit periodically assists in pushing the fuse tube within a preset auxiliary period until the processing module determines that the closing of the current drop-out fuse is in place; The drop-out fuse includes a fuse tube, a extinguishing cover, a swing arm, a push-pull rod, a driving motor, a driving gear and a driving rod, where: When closing is required, after receiving the closing instruction, the processing module outputs the closing instruction to the three relays of the closing module. Each relay corresponds to a driving motor, so that each driving motor rotates forward, so that the driving gear of the driving motor rotates, and then drives the driving rod to move obliquely upward, and then drives the push-pull rod. The push-pull rod drives the fuse tube to rotate coaxially around the pin shaft until the moving contact is combined with the static contact, so as to realize the closing operation of 3 drop-out fuses; For the primary closing detection unit, since the moving contact and the static contact are in contact, a circuit is formed, the high-voltage line is connected to the electrical equipment, and then a voltage is detected in the circuit. Sampling is performed at the moving contact closing position through the voltage sampling sub-unit. The three voltage sampling sub-units respectively correspond to the three phases of the high-voltage line. The input end of the transformer is connected to the sampling end, and then the collected voltage is processed by the signal conditioning sub-unit and transmitted to the processing module, so that the processing module determines whether there is a voltage signal. If there is, it is determined that the initial closing is successful, otherwise the closing is unsuccessful; For the secondary closing detection unit, a trigger sub-unit is installed at the static contact. The trigger sub-unit detects the position of the moving contact relative to the static contact and outputs different trigger instructions, so as to determine whether the closing is in place.

2. The drop fuse control system according to claim 1, characterized in that When the processing module determines that the drop-out fuse is in the closing state, it transmits the generated conduction instruction to the electric energy meter on-off module, so that the switch of the electric energy meter on-off module performs a first action, so as to cut off the power supply branch that provides basic power supply to the electric energy meter in the open state, so that the electric energy meter only accurately detects the power consumption data of the current electrical equipment; When the processing module determines that the drop-out fuse is in the open state, it transmits the generated conduction instruction to the power meter on-off module, so that the switch of the power meter on-off module performs a second action, thereby continuously conducting the power supply branch that provides basic power supply to the power meter in the open state, and then continuously maintaining the basic power supply of the power meter.

Images