CN210092863U - Intelligent fuse device - Google Patents
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- CN210092863U CN210092863U CN201920869912.0U CN201920869912U CN210092863U CN 210092863 U CN210092863 U CN 210092863U CN 201920869912 U CN201920869912 U CN 201920869912U CN 210092863 U CN210092863 U CN 210092863U
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- 229920003023 plastic Polymers 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 239000000155 melt Substances 0.000 description 29
- 238000010586 diagram Methods 0.000 description 5
- 239000006004 Quartz sand Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
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Abstract
The utility model relates to an intelligent fuse device, include: the fusing circuit is connected in series in the voltage transformer inlet circuit, and when the current value of the fusing circuit reaches a preset first threshold value, the connected circuit is disconnected; the detection device is used for detecting the voltage value or the current value of the fusing circuit; the signal sending device is used for sending a fusing signal of the fusing circuit when the voltage value or the current value detected by the detection device reaches a preset second threshold value; and the signal receiving device is connected with the power grid monitoring server and is used for receiving and transmitting the fusing signal to the power grid monitoring server. The utility model provides an intelligent fuse device can intellectual detection system and transmit voltage transformer high-voltage fuse fusing signal to electric wire netting monitoring server to remind relevant staff in time to take effective measure, guarantee the safe operation of electric wire netting, equipment, reduce the loss that the distribution network brought because of the voltage transformer trouble.
Description
Technical Field
The utility model relates to a fuse, especially an intelligent fuse device that is arranged in establishing ties in voltage transformer inlet circuit in distribution network.
Background
A Potential Transformer (PT) is an important device for measuring, metering and relaying voltage in a power distribution network. In order to protect the voltage transformer and avoid adverse effects on a power grid system caused by a fault of a voltage transformer body or a fault of a high-voltage side lead, a high-voltage fuse is generally required to be installed at an inlet of the voltage transformer. The high-voltage fuse is used as a protection device of the voltage transformer, and has the advantages of simple structure and convenience in overhaul and maintenance, so that the high-voltage fuse is widely applied to a power distribution network below 110 kV.
On one hand, in the actual operation process, a voltage transformer in a power distribution network often has a fault of high-voltage fuse fusing, so that the secondary side of the power grid is powered off, the zero sequence voltage is abnormally increased, an electric energy metering error is caused, even false grounding alarm of the system can be caused, the malfunction of a zero sequence voltage protection relay is caused, and an operator can take wrong treatment measures and further enlarge the accident range. On the other hand, the replacement of the high-voltage fuse is troublesome, and the expenditure cost of manpower and material resources can be increased. Therefore, the conventional high-voltage fuse is disadvantageous to the power distribution network to be operated safely, reliably, stably and economically.
SUMMERY OF THE UTILITY MODEL
In view of the above, there is a need for an intelligent fuse device, which is intended to solve at least one of the technical problems in the related art to some extent.
The utility model provides a pair of intelligent fuse device for establish ties in voltage transformer inlet circuit in the distribution network, include:
the fusing circuit is connected in series in the voltage transformer inlet circuit, and when the current value of the fusing circuit reaches a preset first threshold value, the connected circuit is disconnected;
the detection device is used for detecting the voltage value or the current value of the fusing circuit;
the signal sending device is used for sending a fusing signal of the fusing circuit when the voltage value or the current value detected by the detection device reaches a preset second threshold value; and the number of the first and second groups,
and the signal receiving device is connected with the power grid monitoring server and used for receiving the fusing signal sent by the signal sending device and transmitting the fusing signal to the power grid monitoring server.
Above-mentioned intelligent fuse device can intellectual detection system and transmission voltage transformer high-voltage fuse fusing signal to electric wire netting monitoring server to remind relevant staff in time to take effective measure, guarantee the safe operation of electric wire netting, equipment, reduce the loss that the distribution network brought because of the voltage transformer trouble.
In one embodiment, the fuse circuit includes:
the first fusing device is connected in series in the voltage transformer inlet circuit and used for disconnecting the connected circuit when the value of the flowing current reaches a preset third threshold value;
and the second fusing device is connected with the first fusing device in parallel and used for disconnecting the connected circuit when the value of the current flowing through the second fusing device reaches a preset fourth threshold value.
In one embodiment, the resistance of the second fuse device is greater than the resistance of the first fuse device.
In one embodiment, the second fuse device comprises a fuse body and a high-value resistor connected in series, and the detection device comprises a voltage detection device connected with the second fuse device in parallel.
In one embodiment, a high value resistor is connected in series in a circuit in parallel with the first fuse device, the high value resistor is used for reducing current flowing through the second fuse device, and the detection device comprises a voltage detection device connected in parallel with the high value resistor.
In one embodiment, the fusing device further comprises a body fusing indicator light which is lighted when the fusing device body is fused.
In one embodiment, the resistance of the high value resistor may be 10 times or 500 Ω of the resistance of the second fuse device.
In one embodiment, when the voltage value detected by the voltage detection device exceeds 3.0V, the signal sending device sends the fusing signal of the first fusing device, and the signal receiving device receives and transmits the fusing signal of the first fusing device to the grid monitoring server.
In one embodiment, when the voltage value detected by the voltage detection device exceeds 7.5V, the signal sending device sends the fusing signal of the second fusing device, and the signal receiving device receives and transmits the fusing signal of the second fusing device to the grid monitoring server.
In one embodiment, the signal receiving apparatus further includes:
and the signal processing device is used for processing the received fusing signal and then transmitting the fusing signal to the power grid monitoring server.
In one embodiment, the signal transmitting device is a wireless signal transmitting device, and may be an infrared signal transmitting device.
In one embodiment, the signal receiving apparatus further includes:
the antenna is arranged on the outer side of the voltage transformer cabinet and used for transmitting signals to the outside; and the number of the first and second groups,
the infrared signal receiver is arranged on the outer side of the voltage transformer cabinet and is covered by filter glass and/or plastic with a sunlight filtering function; or the infrared signal receiver is arranged inside the voltage transformer cabinet; the infrared signal receiver is powered by a battery and/or obtains electric energy through the voltage transformer.
Drawings
Fig. 1 is a schematic diagram of a system architecture of an intelligent fuse device provided in a first embodiment of the present invention.
Fig. 2 is a schematic diagram of a system architecture of an intelligent fuse device provided in a second embodiment of the present invention.
Fig. 3 is a schematic diagram of a system architecture of an intelligent fuse device provided in a third embodiment of the present invention.
Fig. 4 is a schematic diagram of a system architecture of an intelligent fuse device provided in a fourth embodiment of the present invention.
Fig. 5 is a schematic diagram of a system architecture of an intelligent fuse device provided in a fifth embodiment of the present invention.
Fig. 6 is a schematic view of a melt structure of an intelligent fuse device provided in an embodiment of the present invention.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Where the terms "comprising," "having," and "including" are used herein, another element may be added unless an explicit limitation is used, such as "only," "consisting of … …," etc. Unless mentioned to the contrary, terms in the singular may include the plural and are not to be construed as being one in number.
It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the connection may be direct or indirect via an intermediate medium, and the connection may be internal to the two components. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the present invention, the terms "plurality", and "a plurality" mean two or more unless otherwise specified.
The fuse melts the melt by the heat generated by the fuse after the current exceeds a specified value for a period of time, so that the circuit is disconnected. The fuse is widely applied to high and low voltage distribution systems, control systems and electric equipment as a short circuit and overcurrent protector, and is one of the most commonly applied protection devices.
The fuse is mainly composed of a fuse body, a fuse tube, an additional filler and the like. When the fuse is used, the fuse is connected in series in a protected circuit, when the current of the protected circuit exceeds a specified value, the specified value is the rated current value of the melt, and after a certain time, the melt is fused by the heat generated by the melt, so that the circuit is disconnected, and the protection effect is achieved. The electric appliance which takes the metal conductor as the melt body and breaks the circuit is connected in series in the circuit, when overload or short-circuit current passes through the melt body, the melt body is heated and fused, thereby playing a certain protection role for a power system, various electrical equipment and household appliances. The fuse is mainly composed of a fuse element, a housing and a support 3, wherein the fuse element is a key element for controlling fusing characteristics.
The utility model discloses an in the embodiment provide an intelligent fuse device for establish ties in voltage transformer inlet circuit in the distribution network, include:
the fusing circuit is connected in series in the voltage transformer inlet circuit, and when the current value of the fusing circuit reaches a preset first threshold value, the connected circuit is disconnected; for example, the fusing circuit can comprise a melt, and when the value of the current flowing through the melt reaches the rated current value of the melt, the melt is fused to disconnect the circuit connected with the melt;
the detection device is used for detecting the voltage value or the current value of the fusing circuit; for example, the detecting device may be connected in series in the circuit to detect the value of the current flowing through the circuit, or the detecting device may be connected in parallel with the monitored circuit to detect the voltage value of the monitored circuit;
the signal sending device is used for sending a fusing signal of the fusing circuit when the voltage value or the current value detected by the detecting device reaches a preset second threshold value, in some embodiments, the signal sending device may be a wireless signal sending device, and in this embodiment, the signal sending device may be selected to be an infrared signal sending device;
the signal receiving device is connected to the grid monitoring server, and configured to receive the fusing signal sent by the signal sending device and transmit the fusing signal to the grid monitoring server.
The intelligent fuse device provided in the above embodiment can intelligently detect and transmit a voltage transformer high-voltage fuse fusing signal to a power grid monitoring server to remind relevant workers to take effective measures in time, so that safe operation of a power grid and equipment is ensured, and loss of a power distribution network caused by voltage transformer faults is reduced.
The utility model discloses an in some embodiments, the fusing circuit can include a plurality of fusing device that connect in parallel each other, and fusing device breaks off its circuit that connects when the current value that flows through reaches the regulation current value, and as follows uses fusing circuit to include two fusing device that connect in parallel each other as an example, further explains this embodiment, and fusing circuit includes:
the first fusing device is connected in series in the inlet circuit of the voltage transformer and used for disconnecting the connected circuit when the flowing current value reaches a preset third threshold value, in some embodiments, the first fusing device comprises a melt, and the melt is fused when the flowing current value of the melt in the first fusing device reaches the rated current value of the melt, so that the circuit connected with the first fusing device is disconnected;
the second fusing device is connected with the first fusing device in parallel and used for disconnecting a connected circuit when the value of current flowing through reaches a preset fourth threshold value.
In some embodiments of the present invention, the second fusing device includes a fuse element and a high-value resistor connected in series, and the fuse element fuses when the flowing current value of the fuse element reaches the rated current value of the fuse element, thereby disconnecting the circuit connected to the second fusing device.
In some embodiments of the present invention, the second fuse device is further connected in series with a high value resistor, the high value resistor and the second fuse device connected in series constitute a parallel circuit of the first fuse device, and the high value resistor can reduce a current flowing through the second fuse device. The high value resistor may function to protect the second fuse device after the first fuse device is fused.
The utility model discloses an in some embodiments, fusing device includes body fusing pilot lamp, and the pilot lamp lights when fusing device body fusing, sees fusing pilot lamp when lighting as the staff, can tentatively judge that the fuse-element in the fusing device has fused. In this embodiment, the detection means may include voltage detection means connected in parallel to the high-value resistor for detecting the terminal voltage of the high-value resistor. After the first fusing device fuses and the resonance disappears, the current flowing through the second fusing device can be stabilized in a certain range, the terminal voltage of the high-value resistor can be stabilized in a certain range, and whether the second fusing device is fused or not can be judged by detecting whether the terminal voltage of the high-value resistor is in a preset range or not. For example, with the embodiment of the present invention, the intelligent fuse device is applied to the input circuit of the voltage transformer in the 10KV distribution network, and selects a suitable fuse, in some embodiments, the resistance value of the high value resistor can be set to about 10 times of the resistance value of the second fuse device, and the resistance value of the high value resistor is selected to be 500 Ω here, after the fuse in the first fuse device is fused, the current flowing through the high value resistor can be increased, and thus, whether the first fuse device is fused can be determined by detecting the terminal voltage of the high value resistor. For example, a first threshold value of the voltage detection device is set to 3V according to the resistance values of the selected first fusing device and the second fusing device, and when the measured value of the voltage detection device reaches 3V, the signal sending device is started to send the fusing signal of the first fusing device; after the first fusing device is fused, the current flowing through the second fusing device is quickly stabilized in a normal working state within a range of 10mA-15mA, and the voltage at two ends of the high-value resistor is stabilized within a range of 5V-7.5V, so that the second threshold value of the voltage detection device can be set to be 7.5V, and when the measured value of the voltage detection device reaches 7.5V, the signal sending device is started to send the fusing signal of the second fusing device.
The utility model discloses an in some embodiments, infrared signal receiver sets up in the voltage transformer cabinet outside, owing to have the sunlight to shine, can cover the filter glass and/or the plastics that set up and be used for filtering the sunlight outside infrared signal receiver.
In some embodiments of the present invention, the signal receiving device may be an infrared signal receiver, and may include an antenna for transmitting signals to the outside; the infrared signal receiver is arranged inside the voltage transformer cabinet, and acquires electric energy through the voltage transformer or supplies power through a battery; the antenna can be arranged on the outer side of the voltage transformer cabinet, so that signals can be transmitted conveniently, and in some embodiments, the antenna can transmit the signals to the power grid monitoring server through GPRS.
Some embodiments of the present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, an embodiment of the present invention provides an intelligent fuse device 100 for being connected in series in an inlet circuit of a voltage transformer in a power distribution network, including:
the fusing circuit 110 is connected in series in the voltage transformer inlet circuit, and disconnects the connected circuit when the current value of the fusing circuit reaches a preset first threshold value, for example, the fusing circuit may include a melt, and when the flowing current of the melt reaches the rated current of the melt, the melt is fused, and the circuit connected with the melt is disconnected;
the detecting device 120 is used for detecting the voltage value or the current value of the fuse circuit, for example, the detecting device may be connected in series in the circuit to detect the flowing current value of the circuit, or the detecting device may be connected in parallel with the monitored circuit to detect the voltage value of the monitored circuit;
a signal sending device 130, configured to send a fusing signal of the fusing circuit when the voltage value or the current value detected by the detecting device reaches a preset second threshold value, in some embodiments, the signal sending device may be a wireless signal sending device, and in this embodiment, the signal sending device may be selected to be an infrared signal sending device;
the signal receiving device 140 is connected to the grid monitoring server, and configured to receive the fusing signal sent by the signal sending device and transmit the fusing signal to the grid monitoring server.
The intelligent fuse device provided in this embodiment can intellectual detection system and transmit voltage transformer high-voltage fuse fusing signal to electric wire netting monitoring server to remind relevant staff in time to take effective measures, guarantee the safe operation of electric wire netting, equipment, reduce the loss that the distribution network brought because of the voltage transformer trouble.
As shown in fig. 2, an embodiment of the present invention provides an intelligent fuse device 100 for use in series in an input circuit of a voltage transformer in a power distribution network, which differs from the embodiment shown in fig. 1 in that the fuse circuit includes two fuse devices connected in parallel, i.e.,
the first fusing device 111 is connected in series in the inlet circuit of the voltage transformer and is used for disconnecting the connected circuit when the flowing current value reaches a preset third threshold value, and in some embodiments, the first fusing device comprises a melt which is fused when the flowing current value of the melt reaches the rated current value of the melt, so that the circuit connected with the first fusing device is disconnected;
and the second fusing device 112 is connected in parallel with the first fusing device and is used for disconnecting a connected circuit when the current value flowing through reaches a preset fourth threshold value, the resistance value of the second fusing device is greater than that of the first fusing device, and the second fusing device can continue to work under the condition that the first fusing device disconnects the connected circuit, so that the connected voltage transformer can normally work.
In this embodiment, the detecting device is a voltage detecting device 121 connected in parallel with the second fusing device 112, since the value of the current flowing through the second fusing device 112 increases after the first fusing device 111 is fused, so that the terminal voltage of the second fusing device 112 increases, a first threshold of the voltage detecting device 121 may be set according to the resistance value of the first fusing device 111, and when the measured value of the voltage detecting device 121 reaches the first threshold, the triggering signal sending device 130 sends the fusing signal of the first fusing device 111; setting a second threshold value of the voltage detection device 121 according to the resistance value of the second fusing device 112, and triggering the signal sending device 130 to send the fusing signal of the second fusing device 112 when the measured value of the voltage detection device 121 reaches the second threshold value;
the signal receiving device 140 is connected to the grid monitoring server, and configured to receive the fusing signal sent by the signal sending device and transmit the fusing signal to the grid monitoring server.
In some embodiments of the present invention, the infrared signal receiver may be disposed outside the voltage transformer cabinet, and due to sunlight irradiation, filter glass and/or plastic for filtering sunlight may be covered and disposed outside the infrared signal receiver; in some embodiments, the infrared signal receiver may include an antenna for transmitting signals to the outside, and in the case where the infrared signal receiver is disposed inside the voltage transformer cabinet, the antenna may be disposed outside the voltage transformer cabinet to facilitate transmission of signals. In this embodiment, the antenna may transmit a signal to the grid monitoring server through GPRS. In this embodiment, the infrared signal receiver may obtain power through a voltage transformer, or may be powered by a battery.
As shown in fig. 3, the utility model provides an embodiment of an intelligent fuse device 100 for in series connection voltage transformer entry circuit in the distribution network, with the difference in the embodiment shown in fig. 2 that the second fuse device includes fuse-element 1121 and high value resistance 1122, this fuse-element fusing when the value of the current of flowing through of fuse-element 1121 reaches this rated current value of fuse-element, high value resistance 1122 is used for reducing the value of the current of flowing through of second fuse device 112, make under the condition of the circuit that first fuse device breaks its connection, second fuse device can continue to work, ensure that the voltage transformer that its connection can normally work.
As shown in fig. 4, an embodiment of the present invention provides an intelligent fuse device 100 for being connected in series in an input circuit of a voltage transformer in a power distribution network, which is different from the embodiment shown in fig. 2 in that a high value resistor 1122 is further connected in series to a second fuse device 112, the high value resistor 1122 and the second fuse device 112 connected in series constitute a parallel circuit of a first fuse device 111, and the high value resistor 1122 can reduce a current flowing through the second fuse device 112. High value resistor 1122 may serve to protect second fuse device 112 after first fuse device 111 is blown. In this embodiment, fusing device includes body fusing pilot lamp, and the pilot lamp is lighted when fusing device body fusing, sees fusing pilot lamp when lighting as the staff, can tentatively judge that fusing device body has fused. In this embodiment, the detection means may include voltage detection means 121 connected in parallel to the high-value resistor 1122 for detecting the terminal voltage of the high-value resistor 1122. After the first fuse device 111 is blown and the resonance disappears, the current flowing through the second fuse device 112 will be stable within a certain range, the terminal voltage of the high-value resistor 1122 will also be stable within a certain range, and whether the second fuse device 112 is blown can be determined by detecting whether the terminal voltage of the high-value resistor 1122 is within a predetermined range. For example, with the embodiment of the present invention, the intelligent fusing device is applied to the input circuit of the voltage transformer in the 10KV power distribution network, and selects a suitable fuse, in some embodiments, the resistance value of the high value resistor 1122 can be set to be about 10 times of the resistance value of the second fusing device 112, where the resistance value of the high value resistor 1122 is selected to be 500 Ω, after the fuse in the first fusing device 111 is fused, the current flowing through the high value resistor 1122 can be increased, and thus, whether the first fusing device 111 is fused can be determined by detecting the terminal voltage of the high value resistor 1122. For example, the first threshold value of the voltage detection device 121 is set to 3V according to the selected resistance values of the first and second fusing devices 111 and 112, and the start signal transmission device 130 transmits the fusing signal of the first fusing device 111 when the measured value of the voltage detection device 121 reaches 3V; after the first fuse device 111 is fused, the flowing current of the second fuse device 112 is quickly stabilized within the range of 10mA to 15mA in the normal operating state, and the voltage across the high-value resistor 1122 is stabilized within the range of 5V to 7.5V, so that the second threshold of the voltage detection device 121 can be set to 7.5V, and when the measured value of the voltage detection device 121 reaches 7.5V, the start signal transmission device transmits the fusing signal of the second fuse device 112. The signal receiving device 140 receives the fusing signal and transmits the fusing signal to the grid monitoring server.
As shown in fig. 5, an embodiment of the present invention provides an intelligent fuse device 100 for being connected in series to an input circuit of a voltage transformer in a power distribution network, which is different from the embodiment shown in fig. 4 in that a third fuse device 113 is connected in parallel to a first fuse device 111, and a resistance value of the third fuse device 113 can be set between a resistance value of the first fuse device 111 and a high value resistor 1122. The third fusing device 113 can continue to work after the first fusing device 111 is fused, so that the normal work of a voltage transformer connected with the third fusing device is guaranteed; after the third fusing device 113 is fused, the second fusing device 112 continues to work, and the voltage transformer connected with the second fusing device is guaranteed to work normally. In some embodiments, a plurality of fusing devices may be respectively connected in parallel to two ends of the first fusing device 111 to form a plurality of parallel branches of the first fusing device 111, and resistance values of the branches are different, so that the parallel branches may sequentially play a role in ensuring normal operation of the voltage transformer. The circuit connection form illustrated in fig. 5 schematically illustrates that the number of parallel branches of the first fuse device 111 may be at least 2, and in other embodiments, the number of parallel branches of the first fuse device 111 may be increased or decreased as appropriate according to actual situations.
As shown in fig. 6, an embodiment of the present invention provides a fuse element of an intelligent fuse device, including: outer cap 1123, outer tube 1124, inner tube 1125, inner tube fuse 1126, outer tube fuse 1127, and quartz sand 1128. The outer tube 1124 is a hollow tubular structure, and outer caps 1123 are arranged at the left end and the right end of the outer tube 1124 for sealing the outer tube 1124 and playing a role in insulation protection; the inner pipe 1125 is disposed in a cavity inside the outer pipe 1124, and both left and right ends of the inner pipe 1125 are connected to the outer cap 1123, respectively, so that a closed cavity is formed inside the inner pipe 1125; the inner tube fuse 1126 is arranged in the cavity inside the inner tube 1125, and the left end and the right end of the inner tube fuse 1126 are respectively connected with the outer cap 1123; an outer tube fuse 1127 is disposed in a cavity formed between the inside of the outer tube 1124 and the outside of the inner tube 1125, and both left and right ends of the outer tube fuse 1127 are connected to the outer cap 1123, respectively; outer tube fuse 1127 forms a parallel configuration with inner tube fuse 1126. In this embodiment, the maximum length of the melt may be 194mm, the diameter of the outer cap 1123 may be 30mm, and the cavity inside the outer pipe 1124 and the inner pipe 1125 may be filled with quartz sand 1128 for isolating, insulating and protecting the fuse. In the present embodiment, the resistance value of the inner-tube fuse 1126 may be set to 10 Ω, the resistance value of the outer-tube fuse 1127 may be set to 1.11 Ω, and since the resistance value of the inner-tube fuse 1126 is larger than the resistance value of the outer-tube fuse 1127, the value of the current flowing through the inner-tube fuse 1126 is smaller than the value of the current flowing through the outer-tube fuse 1127, so that the inner-tube fuse 1126 can continue to operate with the outer-tube fuse 1127 blown. Fig. 6 only schematically illustrates the structure of the melt, and the number of fuses connected in parallel to outer tube fuses 1127 may be increased on the basis of the structure of the melt illustrated in fig. 6.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. An intelligent fuse device for series connection in a voltage transformer inlet circuit in a power distribution network, comprising:
the fusing circuit is connected in series in the voltage transformer inlet circuit, and when the current value of the fusing circuit reaches a preset first threshold value, the connected circuit is disconnected;
the detection device is used for detecting the voltage value or the current value of the fusing circuit;
the signal sending device is used for sending a fusing signal of the fusing circuit when the voltage value or the current value detected by the detection device reaches a preset second threshold value; and the number of the first and second groups,
and the signal receiving device is connected with the power grid monitoring server and is used for receiving and transmitting the fusing signal to the power grid monitoring server.
2. The intelligent fuse device of claim 1, wherein the fuse circuit comprises:
the first fusing device is connected in series in the voltage transformer inlet circuit and used for disconnecting the connected circuit when the value of the flowing current reaches a preset third threshold value;
and the second fusing device is connected with the first fusing device in parallel and used for disconnecting the connected circuit when the value of the current flowing through the second fusing device reaches a preset fourth threshold value.
3. The intelligent fuse device of claim 2, wherein the resistance value of the second fuse device is greater than the resistance value of the first fuse device.
4. The intelligent fuse device of claim 2, wherein the second fuse device comprises a fuse element and a high value resistor in series.
5. The intelligent fuse apparatus of claim 4, wherein the detection means comprises a voltage detection means in parallel with the second fuse apparatus.
6. An intelligent fuse device as claimed in any of claims 2 to 4, wherein the second fuse device is connected in series with a high value resistor and together in parallel with the first fuse device, the high value resistor being used to reduce the current through the second fuse device; the detection means comprises voltage detection means connected in parallel with the high value resistance.
7. The intelligent fuse device of any one of claims 2-4, wherein the fusing device includes a body fusing indicator that lights up when the fusing device body fuses.
8. The intelligent fuse device according to any one of claims 2-4, wherein the signal transmission device is a wireless signal transmission device.
9. The intelligent fuse device according to any one of claims 2-4, wherein the signal receiving means comprises:
and the signal processing device is used for processing the received fusing signal and then transmitting the fusing signal to the power grid monitoring server.
10. The intelligent fuse apparatus of claim 9, wherein the signal receiving means further comprises:
the antenna is arranged on the outer side of the voltage transformer cabinet and used for transmitting signals to the outside; and the number of the first and second groups,
the infrared signal receiver is arranged on the outer side of the voltage transformer cabinet, and filter glass and/or plastic with a sunlight filtering function are/is covered on the infrared signal receiver; or the infrared signal receiver is arranged inside the voltage transformer cabinet; the infrared signal receiver is powered by a battery and/or obtains electric energy through the voltage transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920869912.0U CN210092863U (en) | 2019-06-11 | 2019-06-11 | Intelligent fuse device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920869912.0U CN210092863U (en) | 2019-06-11 | 2019-06-11 | Intelligent fuse device |
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| CN210092863U true CN210092863U (en) | 2020-02-18 |
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| CN201920869912.0U Active CN210092863U (en) | 2019-06-11 | 2019-06-11 | Intelligent fuse device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110233469A (en) * | 2019-06-11 | 2019-09-13 | 深圳供电局有限公司 | Intelligent fuse device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110233469A (en) * | 2019-06-11 | 2019-09-13 | 深圳供电局有限公司 | Intelligent fuse device |
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