CN220271507U - Circuit breaker action voltage test system - Google Patents
Circuit breaker action voltage test system Download PDFInfo
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- CN220271507U CN220271507U CN202321720482.9U CN202321720482U CN220271507U CN 220271507 U CN220271507 U CN 220271507U CN 202321720482 U CN202321720482 U CN 202321720482U CN 220271507 U CN220271507 U CN 220271507U
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Abstract
The application relates to the technical field of testing devices and provides a circuit breaker action voltage testing system, and the system includes: a power input module; the switching power supply module is connected with the output end of the power supply input module and is configured to adjust the waveform of input current and compensate the phase difference between current and voltage; the direct-current voltage linear power amplifier module is connected with the output end of the switching power supply module and is connected with the input end of the target circuit breaker; and the output end of the control module is connected with the input end of the direct-current voltage linear power amplifier module, and the input end of the control module is connected with the output end of the target circuit breaker. The circuit breaker action voltage test system can realize transient direct current voltage control output, can realize motorized test, automatically judge whether action and automatically display action voltage values in the test function, does not need manual pressurization and voltage regulation in the test process, and therefore improves the efficiency and accuracy of the circuit breaker action voltage test.
Description
Technical Field
The application relates to the technical field of testing devices, in particular to a circuit breaker action voltage testing system.
Background
A circuit breaker is a switching device capable of closing, carrying and breaking a current under normal circuit conditions, and capable of closing, carrying and breaking a current under abnormal circuit conditions for a prescribed time. The circuit breaker is classified into a high voltage circuit breaker and a low voltage circuit breaker according to its use range. The circuit breaker can be used for distributing electric energy, starting the asynchronous motor infrequently, protecting a power line, the motor and the like, and automatically cutting off the circuit when serious overload or short circuit, undervoltage and other faults occur, and the functions of the circuit breaker are equivalent to the combination of a fuse type switch, an over-under-heating relay and the like.
Based on the existing breaker action voltage test system, a test instrument needs to be manually adjusted, but because the action time of the breaker is very short, the accurate action voltage value cannot be obtained by manual operation.
Therefore, how to obtain accurate breaker operation voltage is a problem to be solved.
Disclosure of Invention
In view of the above problems in the prior art, an object of the present application is to provide a circuit breaker operating voltage testing system, so as to at least solve the technical problem of how to obtain an accurate circuit breaker operating voltage value.
To achieve the above and other related objects, the present application provides a circuit breaker operating voltage testing system, the system comprising:
a power input module;
the switching power supply module is connected with the output end of the power supply input module and is configured to adjust the waveform of input current and compensate the phase difference between current and voltage;
the direct-current voltage linear power amplifier module is connected with the output end of the switching power supply module and is connected with the input end of the target circuit breaker;
the output end of the control module is connected with the input end of the direct-current voltage linear power amplifier module, and the input end of the control module is connected with the output end of the target circuit breaker.
In an embodiment of the present application, the power input module is a 220V ac power input module.
In an embodiment of the present application, the switching power supply module includes a power factor correction unit, a switching power supply unit, and a voltage output control unit, where an output end of the power factor correction unit is connected to an input end of the switching power supply unit, the switching power supply unit is connected to an input end of the voltage output control unit, and an output end of the voltage output control unit is connected to an input end of the dc voltage linear power amplifier module.
In one embodiment of the present application, the switching power supply unit includes 5 sets of 60V tributary power supplies connected in series.
In an embodiment of the present application, the dc voltage linear power amplifier module includes an input unit, a driving unit, a power output unit, a negative feedback adjustment unit, and a protection circuit, where an input end of the input unit is connected to an output end of the switching power supply module, an output end of the input unit is connected to an input end of the driving unit, an input end of the negative feedback adjustment unit is connected to an output end of the power output unit, an output end of the negative feedback adjustment unit is connected to an input end of the driving unit, an output end of the driving unit is connected to an input end of the power output unit, and an output end of the power output unit is connected to an input end of the target circuit breaker.
In an embodiment of the present application, the protection circuit includes a current equalizing circuit, an overheat protection circuit, and a distortion alarm circuit.
In an embodiment of the present application, the input unit includes a differential circuit.
In an embodiment of the present application, the driving unit includes a composite amplifying circuit.
In an embodiment of the present application, the power output unit includes 10 sets of MOS transistors connected in parallel.
In an embodiment of the application, the control module includes a control unit and a display unit.
The utility model has the beneficial effects that:
the power input module is a switch power module function, the switch power module adjusts the waveform of input current, compensates the phase difference between current and voltage, and then is a direct-current voltage linear power amplifier module function, the direct-current voltage linear power amplifier module amplifies an input signal and is a target circuit breaker function, and the control module controls the working state of the direct-current voltage linear power amplifier and collects the direct current and the opening amount of the target circuit breaker during working so as to display the action voltage. The circuit breaker action voltage test system can realize transient direct current voltage control output, can realize motorized test, automatically judge whether action and automatically display action voltage values in the test function, does not need manual pressurization and voltage regulation in the test process, and therefore improves the efficiency and accuracy of the circuit breaker action voltage test.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:
FIG. 1 is a schematic diagram of a circuit breaker operating voltage testing system shown in an exemplary embodiment of the present application;
FIG. 2 is a schematic diagram illustrating the operation of a circuit breaker operating voltage testing system according to an exemplary embodiment of the present application;
fig. 3 is a schematic diagram of a switching power supply module according to an exemplary embodiment of the present application;
fig. 4 is a schematic diagram of a dc voltage linear power amplifier module according to an exemplary embodiment of the present application.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Firstly, in the existing test process of the circuit breaker action voltage, an existing analog circuit breaker is adopted for testing. At present, the existing relay protection tester has a direct-current voltage output function, but the load capacity of the direct-current voltage output is less than 0.5A, and the load requirement of a circuit breaker testing loop cannot be met. In addition, the test wiring of the existing circuit breaker action voltage test system is complex, in the test process, the voltage drop (the voltage drop value changes according to the current change) of the test bed is caused by the small voltage source capacity of the tester, the power supply internal resistance is not negligible, therefore, a tester needs to measure by means of a universal meter, the action time of the circuit breaker is generally less than 100ms, the difficulty of recording the voltage value of the instantaneous change of the universal meter in 100ms is high, meanwhile, the output voltage of the tester needs to be manually and continuously regulated in the test process, and the starting and stopping buttons are continuously operated according to whether the circuit breaker is successfully switched on or off, so that the voltage output time and the output voltage amplitude cannot be accurately controlled, and the risk of burning out the coil or the test instrument caused by the fact that the stopping button is not timely pressed due to untimely reflection of the tester exists, and the accurate action voltage value of the circuit breaker cannot be obtained due to the fact that the output voltage needs manual regulation.
In an embodiment of the present application, in order to solve the problem of how to obtain an accurate breaker action voltage value in the existing breaker action voltage test, a breaker action voltage test system is provided, where the breaker action voltage test system includes:
a power input module;
the switching power supply module is connected with the output end of the power supply input module and is configured to adjust the waveform of input current and compensate the phase difference between current and voltage;
the direct-current voltage linear power amplifier module is connected with the output end of the switching power supply module and is connected with the input end of the target circuit breaker;
the output end of the control module is connected with the input end of the direct-current voltage linear power amplifier module, and the input end of the control module is connected with the output end of the target circuit breaker.
Referring to fig. 1, fig. 1 is a schematic diagram illustrating a circuit breaker operating voltage testing system according to an exemplary embodiment of the present application. In fig. 1, the breaker operation voltage testing system includes a power input module 101, a switching power module 102, a dc voltage linear power amplifier module 103, a control module 104, and a control module 104. The switching power supply module 102 is connected with the output end of the power supply input module 101 and is configured to adjust the waveform of input current and compensate the phase difference between current and voltage; the direct-current voltage linear power amplifier module 103 is connected with the output end of the switching power supply module 102, and the direct-current voltage linear power amplifier module 103 is connected with the input end of the target circuit breaker 105; the output end of the control module 104 is connected with the input end of the 103 direct-current voltage linear power amplifier module, and the input end of the control module 104 is connected with the output end of the target circuit breaker 105.
In an embodiment of the present application, the power input module is a 220V ac power input module.
Referring to fig. 2, for illustration, fig. 2 is a schematic diagram illustrating the operation of a circuit breaker operating voltage testing system according to an exemplary embodiment of the present application. The 220V alternating current power supply input module is used for inputting signals to the switching power supply module, the switching power supply module adjusts the waveform of current through the special IC, compensates the phase difference between current and voltage, and then outputs a direct current voltage value direct current voltage linear power amplifier module; the direct-current voltage linear power amplifier module amplifies voltage and power and then outputs the amplified direct-current voltage to the target circuit breaker; the control module controls the output of the direct-current voltage linear power amplifier module, and collects the opening amount of the target circuit breaker and the direct-current to display the action voltage.
In an embodiment of the present application, the switching power supply module includes a power factor correction unit, a switching power supply unit, and a voltage output control unit, where an output end of the power factor correction unit is connected to an input end of the switching power supply unit, the switching power supply unit is connected to an input end of the voltage output control unit, and an output end of the voltage output control unit is connected to an input end of the dc voltage linear power amplifier module.
In an embodiment of the present application, the switching power supply unit includes 5 sets of 60V tributary power supplies connected in series.
Referring to fig. 3, fig. 3 is a schematic diagram illustrating a structure of a switching power supply module according to an exemplary embodiment of the present application. The switching power supply module adopts an active PFC (power factor correction) design, adjusts the waveform of current through a special IC, compensates the phase difference between current and voltage, and the PF can be more than 0.95. The switching power supply unit adopts a mode of connecting 5 groups of 60V direct current power supplies in series, and is controlled by the voltage output control unit, and the switching power supply unit can provide 60V, 120V, 180V, 240V and 300V power supplies for the direct current voltage linear power amplifier module, so that the heating of the direct current voltage linear power amplifier module is reduced, and the volume and the weight of the whole system are greatly reduced. The PFC and switching power supply unit is used for providing energy for the direct-current voltage linear power amplifier module in the whole system.
In an embodiment of the present application, the dc voltage linear power amplifier module includes an input unit, a driving unit, a power output unit, a negative feedback adjustment unit, and a protection circuit, an input end of the input unit is connected with an output end of the switching power supply module, an output end of the input unit is connected with an input end of the driving unit, an input end of the negative feedback adjustment unit is connected with an output end of the power output unit, an output end of the negative feedback adjustment unit is connected with an input end of the driving unit, an output end of the driving unit is connected with an input end of the power output unit, and an output end of the power output unit is connected with an input end of the target circuit breaker.
In an embodiment of the present application, the protection circuit includes a current equalizing circuit, an overheat protection circuit, and a distortion alarm circuit.
In an embodiment of the present application, the input unit includes a differential circuit.
In an embodiment of the present application, the driving unit includes a composite amplifying circuit.
In an embodiment of the present application, the power output unit includes 10 sets of MOS transistors connected in parallel.
Referring to fig. 4, fig. 4 is a schematic diagram illustrating a dc voltage linear power amplifier module according to an exemplary embodiment of the present application. The direct-current voltage linear power amplifier module comprises an input unit, a driving unit, a power output unit, a negative feedback regulating unit and a protection circuit. Wherein the protection circuit includes: the device comprises a current equalizing circuit, an overheat protection circuit and a distortion alarm circuit. The direct-current voltage linear power amplifier module carries out differential processing on an input signal through an input unit, then a driving unit generates a driving voltage for driving a power output unit through the combined action of the signal and a feedback signal, and the driving voltage drives the power output unit consisting of power tubes to amplify voltage and power.
The input unit receives a small signal externally applied to the power amplifier, and has a decisive influence on the performance of the whole amplifying circuit. The input unit adopts a differential circuit, and the input unit is required to have high input impedance, high stability and strong anti-interference capability.
The driving unit is a composite amplifying circuit formed by using an operational amplifier, and the operational amplifier automatically generates a driving signal matched with the output of the direct-current voltage linear power amplifier module through the comparison of an input signal and an output feedback signal.
The power output unit is used for providing enough output voltage and current for the target circuit breaker, is a core part of the whole direct-current voltage linear power amplifier module, and is also used for determining whether the direct-current voltage linear power amplifier module can reach required performance parameter indexes, and a structure with 10 groups of MOS tubes connected in parallel is adopted in the circuit.
In the protection circuit, the current equalizing circuit is mainly used for balancing the current passing through each path of power tube and mainly preventing a certain path of power tube from being damaged when passing through larger current. The overheat protection circuit is used for closing signals and outputting when the temperature of the direct-current voltage linear power amplifier module is too high. The waveform distortion alarm circuit is used for sending an alarm signal to the tester when detecting that the waveform distortion or the output value of the DC voltage linear power amplifier module is inconsistent with the set value.
In an embodiment of the present application, the control module includes a control unit and a display unit.
As can be seen from the circuit breaker operating circuit, when the circuit breaker is successfully opened and closed, the auxiliary contacts of the circuit breaker are turned over to open the control circuit, so that whether the circuit breaker is successfully opened or closed can be mainly determined by whether the auxiliary contacts of the circuit breaker are turned over or not and testing the circuit current. The auxiliary contact of the breaker is required to be connected to the test equipment in the field test process, and meanwhile, as the auxiliary contact of the breaker is not arranged on a part of the switch, the adaptability is poor, and the field test workload is increased. The use of test loop current criteria avoids the above problems. The control module is internally provided with a 32-bit arm microcontroller with a DSP core, the microcontroller is connected with a 16-bit high-resolution DA (digital to analog) converter through a parallel port, and a 16-bit digital signal is sent through the parallel port, so that the DA outputs an adjustable 0-10V high-precision direct current analog small signal, the analog small signal is provided for the direct current voltage linear power amplifier module to amplify and output, and the direct current voltage linear power amplifier module can output 0-250V high-precision controllable and adjustable direct current voltage. The microcontroller is connected with the 16-bit high-resolution AD analog-to-digital converter through the SPI interface, and the output loop current signal is input into the AD analog-to-digital converter through the conditioning circuit and is converted into a 16-bit digital signal, so that the output loop current is accurately collected. The output voltage is intermittently changed from small to large after the test is started and is output until the circuit breaker is operated (the circuit breaker is output for a while, the circuit breaker is stopped for a while, the circuit breaker coil is prevented from being burnt out by long-time output), the circuit current is synchronously sampled during the output, the circuit current is 0 after the circuit breaker is operated, and the circuit breaker operation logic is intelligently judged based on the current change value. The output voltage automatically stops outputting after the circuit breaker acts, the action voltage value is automatically displayed, the whole process automatic test can be realized, and the test process does not need manual intervention.
In summary, in the present application, the power input module is a switching power module function, the switching power module adjusts the waveform of the input current, compensates the phase difference between the current and the voltage, and then is a dc voltage linear power amplifier module function, the dc voltage linear power amplifier module amplifies the input signal and is a target circuit breaker function, and the control module controls the working state of the dc voltage linear power amplifier and collects the dc current and the opening amount of the target circuit breaker during working so as to display the operating voltage. The circuit breaker action voltage test system can realize transient direct current voltage control output, can realize motorized test, automatically judge whether action and automatically display action voltage values in the test function, does not need manual pressurization and voltage regulation in the test process, and therefore improves the efficiency and accuracy of the circuit breaker action voltage test.
The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. It is therefore intended that all equivalent modifications and changes made by those skilled in the art without departing from the spirit and technical spirit of the present utility model shall be covered by the appended claims.
Claims (10)
1. A circuit breaker action voltage testing system, the system comprising:
a power input module;
the switching power supply module is connected with the output end of the power supply input module and is configured to adjust the waveform of input current and compensate the phase difference between current and voltage;
the direct-current voltage linear power amplifier module is connected with the output end of the switching power supply module and is connected with the input end of the target circuit breaker;
the output end of the control module is connected with the input end of the direct-current voltage linear power amplifier module, and the input end of the control module is connected with the output end of the target circuit breaker.
2. The circuit breaker operating voltage testing system of claim 1 wherein the power input module is a 220V ac power input module.
3. The circuit breaker operating voltage testing system of claim 1, wherein the switching power supply module comprises a power factor correction unit, a switching power supply unit, and a voltage output control unit, the output end of the power factor correction unit is connected with the input end of the switching power supply unit, the switching power supply unit is connected with the input end of the voltage output control unit, and the output end of the voltage output control unit is connected with the input end of the direct-current voltage linear power amplifier module.
4. A circuit breaker action voltage testing system according to claim 3 wherein said switching power supply unit comprises 5 sets of 60V dc power supplies in series.
5. The circuit breaker action voltage testing system of claim 1, wherein the dc voltage linear power amplifier module comprises an input unit, a driving unit, a power output unit, a negative feedback adjustment unit, and a protection circuit, wherein the input end of the input unit is connected with the output end of the switching power supply module, the output end of the input unit is connected with the input end of the driving unit, the input end of the negative feedback adjustment unit is connected with the output end of the power output unit, the output end of the negative feedback adjustment unit is connected with the input end of the driving unit, the output end of the driving unit is connected with the input end of the power output unit, and the output end of the power output unit is connected with the input end of the target circuit breaker.
6. The circuit breaker operating voltage testing system of claim 5 wherein the protection circuit comprises a current sharing circuit, an overheat protection circuit, a distortion alarm circuit.
7. The circuit breaker action voltage testing system of claim 5 wherein the input unit comprises a differential circuit.
8. The circuit breaker action voltage testing system of claim 5 wherein the drive unit comprises a compound amplifier circuit.
9. The circuit breaker operating voltage testing system of claim 5 wherein the power output unit comprises 10 sets of MOS transistors in parallel.
10. The circuit breaker action voltage testing system of claim 1 wherein the control module comprises a control unit and a display unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321720482.9U CN220271507U (en) | 2023-07-03 | 2023-07-03 | Circuit breaker action voltage test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321720482.9U CN220271507U (en) | 2023-07-03 | 2023-07-03 | Circuit breaker action voltage test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220271507U true CN220271507U (en) | 2023-12-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321720482.9U Active CN220271507U (en) | 2023-07-03 | 2023-07-03 | Circuit breaker action voltage test system |
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| Country | Link |
|---|---|
| CN (1) | CN220271507U (en) |
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2023
- 2023-07-03 CN CN202321720482.9U patent/CN220271507U/en active Active
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