Fuse overload breaking test system

Abstract

The utility model relates to the technical field of fuses, in particular to a fuse overload breaking test system, which comprises a control device, a data acquisition device, a low-voltage constant-current source device, a constant-voltage constant-current source device and a fuse test grade. The control device is electrically connected with the low-voltage constant-current source device, the constant-voltage constant-current source device and the data acquisition device respectively; the data acquisition device is electrically connected with the fuse test grade; and the fuse test grade is electrically connected with the low-voltage constant-current source device and the constant-voltage constant-current source device. The system provided by the utility model is safe and reliable, has a modularized, universal and standardized structure, and is compact in overall structure, simple to install, convenient to replace and easy to maintain.

Description

TECHNICAL FIELD

[0001] The utility model relates to fuse technology field especially relates to a fuse overload breaking test system. BACKGROUND

[0002] With the rapid development of power system and the wide application of electrical equipment, as the key element of protecting the circuit from overload or short-circuit damage, the stability and reliability of the performance of the fuse are particularly important. The working principle of the fuse is that when the current in the circuit exceeds the preset value, the fuse inside the fuse melts due to temperature rise, thereby cutting off the circuit to achieve the protection effect. In order to ensure the reliability and safety of the fuse in actual application, various tests need to be carried out on the fuse, especially the test of overload breaking capacity.

[0003] However, the traditional fuse overload breaking test system is limited by the power capacity and cannot maintain operation for a long time under constant voltage and constant current conditions. In addition, the traditional fuse overload breaking test system has problems such as complex wiring and inconvenient maintenance. These problems not only affect the accuracy and reliability of the test results, but also increase the complexity and cost of the test.

[0004] Therefore, there is an urgent need for a fuse overload breaking test system. SUMMARY

[0005] (I) Technical problem to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a fuse overload breaking test system, which solves the technical problems of complex wiring and inconvenient maintenance in the prior art.

[0007] (II) Technical scheme

[0008] In order to achieve the above-mentioned purpose, the utility model adopts the main technical scheme including:

[0009] The utility model embodiment provides a kind of fuse overload breaking test system, comprising:

[0010] Control device, data acquisition device, low-voltage constant-current source device, constant-voltage constant-current source device and fuse test product site;

[0011] The control device is respectively connected with the low-voltage constant-current source device, constant-voltage constant-current source device and data acquisition device;The data acquisition device is connected with the fuse test product site;The fuse test product site is connected with the low-voltage constant-current source device and constant-voltage constant-current source device.

[0012] Optionally, the control device includes:

[0013] The first analog signal conditioning circuit, the second analog signal conditioning circuit, the A / D interface, the DSP controller, the DI / DO interface, the first switch quantity input / output circuit and the second switch quantity input / output circuit;

[0014] The DSP controller is electrically connected with the A / D interface and the DI / DO interface, the A / D interface is electrically connected with the first analog signal conditioning circuit and the second analog signal conditioning circuit, and the DI / DO interface is electrically connected with the first switch quantity input / output circuit and the second switch quantity input / output circuit.

[0015] The first analog signal conditioning circuit and the second analog signal conditioning circuit are respectively electrically connected with a data acquisition device, the first switch quantity input / output circuit is electrically connected with a low-voltage constant current source device, and the second switch quantity input / output circuit is electrically connected with a constant-voltage constant-current source device.

[0016] Optionally, the data acquisition device comprises:

[0017] a voltage sensor, a current sensor and a data display component.

[0018] The voltage sensor and the current sensor are respectively electrically connected with the data display component; the voltage sensor is a resistance-capacitance voltage divider, and the current sensor is an optical fiber sensor.

[0019] The voltage sensor is further electrically connected with the first analog signal conditioning circuit in the fuse sample position and the control device.

[0020] The current sensor is further electrically connected with the second analog signal conditioning circuit in the fuse sample position and the control device.

[0021] Optionally, the low-voltage constant current source device comprises:

[0022] a first power supply cabinet, a multi-magnetic circuit transformer, a first rectifier cabinet and a first switch.

[0023] The first power supply cabinet is electrically connected with the multi-magnetic circuit transformer, the multi-magnetic circuit transformer is electrically connected with the first rectifier cabinet, the first rectifier cabinet is electrically connected with the first switch, and the first switch is electrically connected with the fuse sample position.

[0024] The first power supply cabinet and the first switch are further electrically connected with the first switch quantity input / output circuit of the control device.

[0025] Optionally, the constant-voltage constant-current source device comprises:

[0026] a second power supply cabinet, a short-circuit impact transformer, a second rectifier cabinet, an impedance load and a second switch.

[0027] The second power cabinet is electrically connected with a short-circuit impact transformer, the short-circuit impact transformer is electrically connected with a second rectifier cabinet, the second rectifier cabinet is electrically connected with an impedance load, the impedance load is electrically connected with a second switch, and the second switch is electrically connected with a fuse test level.

[0028] The second power cabinet and the second switch are also electrically connected with a second switch quantity input / output circuit of the control device.

[0029] Optionally, the multi-magnetic-circuit transformer is a transformer with four independent windings in the primary side and one winding in the secondary side; and any one of the four independent windings in the primary side is a voltage regulator.

[0030] Optionally, the fuse test level is electrically connected through a short-circuit wire.

[0031] Optionally, the first switch of the low-voltage constant-current source device and the second switch of the constant-voltage constant-current source device are mechanically interlocked.

[0032] When the first switch is in communication with the fuse test level, the second switch is turned off; and when the first switch is disconnected from the fuse test level, the second switch is turned on.

[0033] Optionally, the control device comprises:

[0034] a fault early warning component;

[0035] The fault early warning component is electrically connected with the DSP controller.

[0036] Optionally, the constant-voltage constant-current source device further comprises:

[0037] a heat dissipation device;

[0038] The heat dissipation device is fixed outside the short-circuit impact transformer.

[0039] The heat dissipation device comprises heat dissipation fins and a heat dissipation fan.

[0040] (Three) beneficial effects

[0041] The fuse overload breaking test system has the advantages that the fuse overload breaking test system is safe and reliable, has a modular, universal and standardized structure, is compact in overall structure, simple to install, convenient to replace and easy to maintain. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 is a structural block diagram of the fuse overload breaking test system of the utility model embodiment;

[0043] Figure 2 is a detailed structural diagram of the fuse overload breaking test system of the utility model embodiment.

[0044] REFERENCE NUMERALS

[0045] 1: control device; 2: data acquisition device; 3: low-voltage constant-current source device; 4: constant-voltage constant-current source device; 5: fuse test position;

[0046] 1.1: A / D interface; 1.2: DSP controller; 1.3: DI / DO interface; 1.4: first analog signal conditioning circuit; 1.5: second analog signal conditioning circuit; 1.6: first switch quantity input / output circuit; 1.7: second switch quantity input / output circuit;

[0047] 2.1: data display component; 2.2: voltage sensor; 2.3: current sensor;

[0048] 3.1: first power supply cabinet; 3.2: multi-magnetic circuit transformer; 3.3: first rectifier cabinet; 3.4: first switch;

[0049] 4.1: second power supply cabinet; 4.2: short-circuit impact transformer; 4.3: second rectifier cabinet; 4.4: impedance load; 4.5: second switch. DETAILED DESCRIPTION

[0050] In order to better explain the utility model, so as to facilitate understanding, the following combining with the specific embodiments, the utility model is described in detail.

[0051] The fuse overload breaking test system provided by the embodiment of the utility model, in order to solve the technical problem of slow data acquisition and processing speed, and complex wiring, inconvenient maintenance in the prior art, by dividing the system into fuse test position, data acquisition device, control device, low-voltage constant-current source device and constant-voltage constant-current source device, it has modular, generalization, standardization structure, compact overall structure;

[0052] Further, the utility model places control device and fuse test position in different spaces, sets up data display component in data acquisition device, reduces the protection requirement of equipment, has remote operation and monitoring function, guarantees the safety of equipment and test personnel;

[0053] Meanwhile, the voltage sensor in the data acquisition device of the utility model is a resistance-capacitance voltage divider, and the current sensor is an optical fiber sensor, which improves the anti-interference ability of the system.

[0054] For better understanding of the above technical solutions, the exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer, more thorough understanding of the present application and to convey the complete scope of the present application to those skilled in the art.

[0055] Embodiment 1

[0056] Referring to Figure 1 , the fuse overload breaking test system in the embodiment of the present application comprises:

[0057] The control device 1, the data acquisition device 2, the low-voltage constant current source device 3, the constant-voltage constant current source device 4, and the fuse test product level 5;

[0058] The control device 1 is electrically connected with the low-voltage constant current source device 3, the constant-voltage constant current source device 4, and the data acquisition device 2 respectively; the data acquisition device 2 is electrically connected with the fuse test product level 5; and the fuse test product level 5 is electrically connected with the low-voltage constant current source device 3 and the constant-voltage constant current source device 4.

[0059] The fuse test product level 5 is electrically connected through a short connection line.

[0060] In the specific implementation process, the control device 1 and the fuse test product level 5 are respectively arranged in different spaces, thereby reducing the protection requirements of the equipment.

[0061] In the embodiment, the control device 1 comprises:

[0062] The first analog signal conditioning circuit 1.4, the second analog signal conditioning circuit 1.5, the A / D interface 1.1, the DSP controller 1.2, the DI / DO interface 1.3, the first switching quantity input / output circuit 1.6, and the second switching quantity input / output circuit 1.7;

[0063] The DSP controller 1.2 is electrically connected with the A / D interface 1.1 and the DI / DO interface 1.3, the A / D interface 1.1 is electrically connected with the first analog signal conditioning circuit 1.4 and the second analog signal conditioning circuit 1.5; and the DI / DO interface 1.3 is electrically connected with the first switching quantity input / output circuit 1.6 and the second switching quantity input / output circuit 1.7;

[0064] Moreover, the first analog signal conditioning circuit 1.4 and the second analog signal conditioning circuit 1.5 are respectively electrically connected with the data acquisition device 2, the first switching quantity input / output circuit 1.6 is electrically connected with the low-voltage constant current source device 3, and the second switching quantity input / output circuit 1.7 is electrically connected with the constant-voltage constant current source device 4.

[0065] Specifically, by using the first analog signal conditioning circuit 1.4 and the second analog signal conditioning circuit 1.5, the raw analog signals from the voltage sensor 2.2 and the current sensor 2.3 can be pre-processed, such as filtering, amplification, etc., to improve the quality of the signals, which helps the A / D interface 1.1 to convert the analog signals to digital signals more accurately, thereby improving the accuracy of data acquisition.

[0066] Through the connection of the DI / DO interface 1.3 with the first and second switch quantity input / output circuits 1.6 and 1.7, the control device 1 can conveniently interact with the equipment in digital signals, which not only supports various types of input / output requirements, but also increases the flexibility and scalability of the system.

[0067] At the same time, by setting the DSP controller 1.2, which is good at real-time processing of complex mathematical operations, the data of the A / D interface 1.1 can be quickly received and processed, improving the efficiency of data processing.

[0068] In this embodiment, the existence of the first and second analog signal conditioning circuits 1.4 and 1.5 can effectively reduce the influence of external interference on the signals, and the first and second switch quantity input / output circuits 1.6 and 1.7 can ensure the stable transmission of digital signals, thereby improving the stability and reliability of the entire control device 1.

[0069] The data acquisition device 2 comprises:

[0070] a voltage sensor 2.2, a current sensor 2.3, and a data display component 2.1;

[0071] The voltage sensor 2.2 and the current sensor 2.3 are electrically connected with the data display component 2.1; the voltage sensor 2.2 is a resistance-capacitance voltage divider, and the current sensor 2.3 is an optical fiber sensor;

[0072] The voltage sensor 2.2 is also electrically connected with the fuse test level 5 and the first analog signal conditioning circuit 1.4 in the control device 1;

[0073] The current sensor 2.3 is also electrically connected with the fuse test level 5 and the second analog signal conditioning circuit 1.5 in the control device 1.

[0074] In the specific implementation process, the voltage sensor 2.2 is a resistance-capacitance voltage divider, and the current sensor 2.3 is an optical fiber sensor.

[0075] The resistance-capacitance voltage divider can realize accurate measurement of high voltage through the voltage division effect of resistance and capacitance, and has simple structure, low cost and high precision. Further, the resistance-capacitance voltage divider consumes very little power when working, and has short response time, and can quickly capture the change of voltage.

[0076] The optical fiber sensor is used as the current sensor 2.3, which transmits information by optical signal and is not affected by electromagnetic interference, and has high insulation performance. At the same time, the optical fiber sensor can realize non-contact current measurement, avoiding the safety risk and interference of direct contact to the measured circuit.

[0077] Further, the optical fiber sensor has high sensitivity and can detect small current changes, so as to realize accurate measurement.

[0078] In addition, the data display component 2.1 in the embodiment supports multi-channel display, and users can select different display modes according to needs, thereby enhancing the flexibility of the system. The data display component 2.1 is a touch screen and supports multiple languages, which can meet the needs of users in different regions; supports external storage and network interface, so that the system is more open and extensible, and adapts to the needs of future technological development.

[0079] The low-voltage constant-current source device 3 comprises:

[0080] The first power supply cabinet 3.1, the multi-magnetic circuit transformer 3.2, the first rectifier cabinet 3.3, and the first switch 3.4;

[0081] The first power supply cabinet 3.1 is electrically connected to the multi-magnetic circuit transformer 3.2, the multi-magnetic circuit transformer 3.2 is electrically connected to the first rectifier cabinet 3.3, the first rectifier cabinet 3.3 is electrically connected to the first switch 3.4, and the first switch 3.4 is electrically connected to the fuse test level 5.

[0082] The first power supply cabinet 3.1 and the first switch 3.4 are also electrically connected to the first switch quantity input / output circuit 1.6 of the control device 1.

[0083] The multi-magnetic circuit transformer 3.2 is a transformer with four independent windings in the primary side and one winding in the secondary side; and any one of the four independent windings in the primary side is a voltage regulator.

[0084] In the embodiment, the primary side of the multi-magnetic circuit transformer 3.2 has four independent windings, and one of the windings is used as a voltage regulator, which means that the input voltage of the transformer can be changed by adjusting the voltage of the voltage regulator. This design allows users to flexibly adjust the output current according to actual needs, and is suitable for applications under different load conditions.

[0085] Further, the multiple independent windings in the multi-magnetic circuit transformer 3.2 can offset the magnetic field to some extent, reduce the influence on the external environment, thereby reducing electromagnetic interference and avoiding interference with the normal work of other devices.

[0086] The constant-voltage constant-current source device 4 comprises:

[0087] The second power supply cabinet 4.1, the short-circuit impact transformer 4.2, the second rectifier cabinet 4.3, the impedance load 4.4, and the second switch 4.5;

[0088] The second power supply cabinet 4.1 is electrically connected to the short-circuit impact transformer 4.2, the short-circuit impact transformer 4.2 is electrically connected to the second rectifier cabinet 4.3, the second rectifier cabinet 4.3 is electrically connected to the impedance load 4.4, the impedance load 4.4 is electrically connected to the second switch 4.5, and the second switch 4.5 is electrically connected to the fuse test level 5.

[0089] The second power supply cabinet 4.1 and the second switch 4.5 are also electrically connected to the second switch input / output circuit 1.7 of the control device 1.

[0090] In this embodiment, the short-circuit impact transformer 4.2 can provide a large current in a short time to simulate the actual short-circuit condition, and the impedance load 4.4 can adjust the impedance value during the test to simulate different load conditions, thereby more comprehensively testing the performance of the device.

[0091] In this embodiment, the first switch 3.4 of the low-voltage constant-current source device 3 and the second switch 4.5 of the constant-voltage constant-current source device 4 are mechanically interlocked;

[0092] When the first switch 3.4 is in communication with the fuse test level 5, the second switch 4.5 is open; when the first switch 3.4 is disconnected from the fuse test level 5, the second switch 4.5 is closed.

[0093] Through the mechanical interlocking mechanism between the first switch 3.4 of the low-voltage constant-current source device 3 and the second switch 4.5 of the constant-voltage constant-current source device 4, the operation and maintenance of the system are simplified, and the resource utilization is optimized.

[0094] In this embodiment, the control device 1 further comprises:

[0095] a fault early warning component;

[0096] The fault early warning component is electrically connected to the DSP controller 1.2.

[0097] The constant-voltage constant-current source device 4 further comprises:

[0098] a heat dissipation device;

[0099] The heat dissipation device is fixed outside the short-circuit impact transformer 4.2;

[0100] The heat dissipation device comprises heat dissipation fins and a heat dissipation fan.

[0101] By adding the fault early warning assembly and the heat dissipation device in the fuse overload breaking test system in the embodiment, the system is comprehensively improved in fault detection and temperature control, the overall performance and reliability are improved, and the performance and user experience are optimized.

[0102] The fuse overload breaking test system in the embodiment provides a safe and reliable fuse overload breaking test system with a modular, universal and standardized structure, and the fuse overload breaking test system is compact in overall structure, simple to install, convenient to replace and easy to maintain.

[0103] In the description of the utility model, it is to be understood that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0104] In the utility model, unless otherwise specifically defined and limited, the terms "installation", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium; it can be the communication between two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0105] In the utility model, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature, can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature, can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is lower than that of the second feature.

[0106] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0107] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and the person skilled in the art can modify, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A fuse overload breaking test system, characterized in that, include: Control device (1), data acquisition device (2), low voltage constant current source device (3), constant voltage constant current source device (4), and fuse test sample (5); The control device (1) is electrically connected to the low-voltage constant current source device (3), the constant voltage constant current source device (4) and the data acquisition device (2) respectively; the data acquisition device (2) is electrically connected to the fuse test position (5); the fuse test position (5) is electrically connected to the low-voltage constant current source device (3) and the constant voltage constant current source device (4).

2. The fuse overload breaking test system according to claim 1, characterized in that, The control device (1) includes: The circuit includes a first analog signal conditioning circuit (1.4), a second analog signal conditioning circuit (1.5), an A / D interface (1.1), a DSP controller (1.2), a DI / DO interface (1.3), a first digital input / output circuit (1.6), and a second digital input / output circuit (1.7). The DSP controller (1.2) is electrically connected to the A / D interface (1.1) and the DI / DO interface (1.3). The A / D interface (1.1) is electrically connected to the first analog signal conditioning circuit (1.4) and the second analog signal conditioning circuit (1.5). The DI / DO interface (1.3) is electrically connected to the first digital input / output circuit (1.6) and the second digital input / output circuit (1.7). Furthermore, the first analog signal conditioning circuit (1.4) and the second analog signal conditioning circuit (1.5) are electrically connected to the data acquisition device (2), the first digital input / output circuit (1.6) is electrically connected to the low-voltage constant current source device (3), and the second digital input / output circuit (1.7) is electrically connected to the constant voltage constant current source device (4).

3. The fuse overload breaking test system according to claim 2, characterized in that, The data acquisition device (2) includes: Voltage sensor (2.2), current sensor (2.3), and data display component (2.1); The voltage sensor (2.2) and the current sensor (2.3) are electrically connected to the data display component (2.1); the voltage sensor (2.2) is a resistive-capacitive voltage divider, and the current sensor (2.3) is an optical fiber sensor. The voltage sensor (2.2) is also electrically connected to the fuse test position (5) and the first analog signal conditioning circuit (1.4) in the control device (1); The current sensor (2.3) is also electrically connected to the fuse test position (5) and the second analog signal conditioning circuit (1.5) in the control device (1).

4. The fuse overload breaking test system according to claim 2, characterized in that, The low-voltage constant current source device (3) includes: The first power supply cabinet (3.1), the multi-magnetic circuit transformer (3.2), the first rectifier cabinet (3.3), and the first switch (3.4); The first power supply cabinet (3.1) is electrically connected to the multi-magnetic circuit transformer (3.2), the multi-magnetic circuit transformer (3.2) is electrically connected to the first rectifier cabinet (3.3), the first rectifier cabinet (3.3) is electrically connected to the first switch (3.4), and the first switch (3.4) is electrically connected to the fuse test position (5). The first power cabinet (3.1) and the first switch (3.4) are also electrically connected to the first digital input / output circuit (1.6) of the control device (1).

5. The fuse overload breaking test system according to claim 2, characterized in that, The constant voltage and constant current source device (4) includes: The second power supply cabinet (4.1), the short-circuit impact transformer (4.2), the second rectifier cabinet (4.3), the impedance load (4.4), and the second switch (4.5). The second power supply cabinet (4.1) is electrically connected to the short-circuit impulse transformer (4.2), the short-circuit impulse transformer (4.2) is electrically connected to the second rectifier cabinet (4.3), the second rectifier cabinet (4.3) is electrically connected to the impedance load (4.4), the impedance load (4.4) is electrically connected to the second switch (4.5), and the second switch (4.5) is electrically connected to the fuse test position (5). The second power supply cabinet (4.1) and the second switch (4.5) are also electrically connected to the second digital input / output circuit (1.7) of the control device (1).

6. The fuse overload breaking test system according to claim 4, characterized in that, The multi-magnetic-circuit transformer (3.2) is a transformer with four independent windings on the primary side and one winding on the secondary side; and any one of the four independent windings on the primary side is a voltage regulator.

7. The fuse overload breaking test system according to claim 1, characterized in that, The fuse test piece (5) is electrically connected via a shorting wire.

8. The fuse overload breaking test system according to claim 1, characterized in that, The first switch (3.4) of the low-voltage constant current source device (3) and the second switch (4.5) of the constant-voltage constant current source device (4) are mechanically interlocked. When the first switch (3.4) is connected to the fuse test position (5), the second switch (4.5) is open; when the first switch (3.4) is disconnected from the fuse test position (5), the second switch (4.5) is closed.

9. The fuse overload breaking test system according to claim 2, characterized in that, The control device (1) includes: Fault warning component; The fault warning component is electrically connected to the DSP controller (1.2).

10. The fuse overload breaking test system according to claim 5, characterized in that, The constant voltage and constant current source device (4) also includes: Heat dissipation device; The heat dissipation device is fixed to the outside of the short-circuit impact transformer (4.2); The heat dissipation device includes: heat dissipation fins and a cooling fan.

Images