CN210720564U - Electrical performance testing device of low-voltage complete equipment - Google Patents
Electrical performance testing device of low-voltage complete equipment Download PDFInfo
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- CN210720564U CN210720564U CN201921699959.3U CN201921699959U CN210720564U CN 210720564 U CN210720564 U CN 210720564U CN 201921699959 U CN201921699959 U CN 201921699959U CN 210720564 U CN210720564 U CN 210720564U
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Abstract
The utility model discloses a low pressure complete sets's electrical performance testing arrangement, include: n voltage detection circuits; m current detection circuits; wherein M and N are positive integers; a controller connected with the N voltage detection circuits, the M current detection circuits and the display device and used for displaying various electrical parameters on the display device according to the output of the N voltage detection circuits and the output of the M current detection circuits; a display device; and the power generation device is connected with the controller and used for providing rated current for the electrical performance test of the low-voltage complete equipment when receiving the control signal of the controller. By the scheme, the testing efficiency and the testing accuracy of the electrical performance test of the low-voltage complete equipment can be effectively improved, and the stability of the test is favorably guaranteed.
Description
Technical Field
The utility model relates to a low pressure complete sets detects technical field, especially relates to a low pressure complete sets's electrical performance testing arrangement.
Background
The low-voltage plant is generally a plant used in a voltage class of 380V or less, and includes electric devices such as a low-voltage switchgear, a switchboard, a control box, and a switch box. Low-voltage plants are widely used in power distribution, electrical transmission and automatic control devices of low-voltage power supply systems.
In the process of detecting the electrical performance of the low-voltage complete equipment, in the traditional scheme, various measuring devices are often used for measuring different parameters, so that the measuring devices are connected and disconnected for many times, the utilization rate is low, and the detection efficiency is low. For example, when an electrical performance test is performed according to bus duct GB/T7251.6-2015 standard, a rated current needs to be supplied to measure parameters such as resistance, reactance, impedance, and the like of the bus duct when the temperature rise of the bus duct is stable, as shown in fig. 1, an ammeter, a voltmeter, and a power meter need to measure the current, the voltage, and the power, and then parameters such as resistance, reactance, impedance, and the like are manually calculated according to a conversion formula. In addition, since the current, the voltage and the power are measured by different devices, it is difficult to ensure that all parameters can be triggered synchronously, that is, only data acquisition in an instantaneous state is possible, and data acquisition cannot be performed in real time. Because the real-time measurement of the data can not be realized, the testing efficiency is reduced, and the testing accuracy is not improved.
In summary, how to effectively improve the testing efficiency and the testing accuracy of the electrical performance test of the low-voltage complete equipment is a technical problem that needs to be solved urgently by those skilled in the art at present.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a low pressure complete sets's electrical performance testing arrangement to improve low pressure complete sets's electrical performance test's efficiency of software testing and the degree of accuracy of test.
In order to solve the technical problem, the utility model provides a following technical scheme:
an electrical performance testing device for a low-voltage complete equipment, comprising:
n voltage detection circuits;
m current detection circuits; wherein M and N are positive integers;
the controller is connected with the N voltage detection circuits, the M current detection circuits and the display device and is used for displaying various electrical parameters on the display device according to the output of the N voltage detection circuits and the output of the M current detection circuits;
the display device;
and the power generation device is connected with the controller and used for providing rated current for the electrical performance test of the low-voltage complete equipment when receiving the control signal of the controller.
Preferably, each of the voltage detection circuits includes:
the voltage input circuit is used for sampling voltage;
the first operational amplifier is connected with the voltage input circuit;
and the first analog-to-digital conversion circuit is connected with the first operational amplifier and the controller.
Preferably, each of the voltage detection circuits further includes:
a voltage divider disposed between the voltage input circuit and the first operational amplifier;
a first isolation circuit disposed between the first analog-to-digital conversion circuit and the controller.
Preferably, each of the current detection circuits includes:
the current input circuit is used for sampling current;
the second operational amplifier is connected with the current input circuit;
and the second analog-to-digital conversion circuit is connected with the second operational amplifier and the controller.
Preferably, each of the current detection circuits further includes:
a current divider disposed between the current input circuit and the second operational amplifier;
a second isolation circuit disposed between the second analog-to-digital conversion circuit and the controller.
Preferably, the method further comprises the following steps:
and the protection device is connected with the controller and used for outputting a termination signal to the controller when the low-voltage complete equipment is detected to be abnormal, so that the controller stops the electrical performance test of the low-voltage complete equipment after receiving the termination signal.
Preferably, the voltage input circuit is a high-precision voltage transformer.
Preferably, the current input circuit is a high-precision current transformer.
Use the embodiment of the utility model provides a technical scheme because included N way voltage detection circuit and M way current detection circuit in testing arrangement for testing arrangement can multiple spot synchronous measurement data, and then the controller can show each electrical parameter in real time, can't acquire each data in step in comparing in traditional scheme, and the testing arrangement of this application has realized the real-time measurement of data, consequently is favorable to improving the degree of accuracy of test, also is favorable to improving efficiency of software testing. In addition, this application can utilize power generation facility to provide rated current for the electric performance test of low pressure complete sets, compares in the traditional method that adopts the commercial power, provides rated current through power generation facility and is favorable to guaranteeing the stability of test. Therefore, the scheme of the application can effectively improve the testing efficiency and the testing accuracy of the electrical performance test of the low-voltage complete equipment, and is favorable for guaranteeing the stability of the test.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a device for testing electrical performance of a bus duct in a conventional scheme;
fig. 2 is a schematic structural view of an electrical performance testing device of the low voltage bushing apparatus of the present invention;
fig. 3 is a schematic structural diagram of an electrical performance testing apparatus for low-voltage complete equipment in a specific embodiment of the present invention.
Detailed Description
The core of the utility model is to provide a low pressure complete sets's electrical performance testing arrangement, can improve low pressure complete sets's electrical performance test's the efficiency of software testing and the degree of accuracy of test effectively to be favorable to the stability of guarantee test.
In order to make the technical field better understand the solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and the detailed description. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 2, fig. 2 is a schematic structural diagram of an electrical performance testing apparatus of a low-voltage complete equipment according to the present invention, the electrical performance testing apparatus of the low-voltage complete equipment may include:
an N-way voltage detection circuit 10;
m current detection circuits 20; wherein M and N are positive integers.
The values of M and N can be set and adjusted according to actual conditions, and it should be noted that, in fig. 2 and 3 of the present application, only the 1-way voltage detection circuit 10 and the 1-way current detection circuit 20 are shown, and in practical applications, the multi-way voltage detection circuit 10 and the multi-way current detection circuit 20 are usually provided.
The specific circuit configuration of the voltage detection circuit 10 and the current detection circuit 20 can also be set and adjusted according to actual conditions, for example, in a specific embodiment of the present invention, each voltage detection circuit 10 includes:
a voltage input circuit 11 for performing voltage sampling;
a first operational amplifier 13 connected to the voltage input circuit 11;
and a first analog-to-digital conversion circuit 14 connected to the first operational amplifier 13 and the controller 30.
This embodiment is a voltage detection circuit 10 which is relatively commonly used, the circuit configuration is simple, the application range is wide, and in addition, in the embodiment of fig. 3, each voltage detection circuit 10 further includes: a voltage divider 12 disposed between the voltage input circuit 11 and the first operational amplifier 13; a first isolation circuit 15 disposed between the first analog-to-digital conversion circuit 14 and the controller 30.
The voltage input circuit 11 is used to obtain voltage input, for example, in order to obtain a more accurate test result, the voltage input circuit 11 may be specifically selected as a high-precision voltage transformer, and of course, other circuit structures may be used in other occasions.
The voltage divider 12 disposed between the voltage input circuit 11 and the first operational amplifier 13 may be a resistor device, and is generally applied to the situation where the collected voltage level is higher, the voltage can be made to reach the voltage specification of the input terminal of the first operational amplifier 13 through the voltage divider 12.
After analog-to-digital conversion of the first analog-to-digital conversion circuit 14, the voltage signal output by the first operational amplifier 13 can be output to the controller 30, so that the controller 30 acquires the voltage signal detected by the voltage detection circuit 10. In the embodiment of fig. 3, a first isolation circuit 15 is disposed between the first analog-to-digital conversion circuit 14 and the controller 30, and is used for protecting the controller 30, for example, when the voltage detection circuit 10 is abnormal, for example, overvoltage and overcurrent are caused by short circuit, damage to the controller 30 is avoided due to the arrangement of the first isolation circuit 15, and meanwhile, dangerous voltage can be isolated to a certain extent by the arrangement of the first isolation circuit 15, so as to protect personal safety of a user. The first isolation circuit 15 may be generally selected to be an optically coupled isolation circuit. Accordingly, the second isolation circuit 25 can also protect the corresponding branch.
In a specific embodiment of the present invention, each of the current detection circuits 20 may include:
a current input circuit 21 for sampling a current;
a second operational amplifier 23 connected to the current input circuit 21;
and a second analog-to-digital conversion circuit 24 connected to the second operational amplifier 23 and the controller 30.
The current detection circuit 20 in this embodiment is also a current detection circuit 20 that is relatively common, and has a relatively simple circuit configuration and can detect a relatively accurate current. In addition, in the embodiment of fig. 3, each of the current detection circuits 20 further includes:
a shunt 22 provided between the current input circuit 21 and the second operational amplifier 23;
and a second isolation circuit 25 disposed between the second analog-to-digital conversion circuit 24 and the controller 30.
The current input circuit 21 is used to obtain a current input, for example, the current input is obtained through a detection resistor connected in series in a line, and for example, the current input circuit 21 may be a current transformer with a wide application range, and in consideration of obtaining a high-precision test result, the current input circuit 21 may be selected as a high-precision current transformer.
In some cases, the current value obtained by the current input circuit 21 is large, so that a current divider 22 is arranged between the current input circuit 21 and the second operational amplifier 23 in fig. 3, the current signal output by the current input circuit 21 can be converted into a voltage signal by the current divider 22, and the converted voltage signal can reach the voltage specification of the input end of the second operational amplifier 23.
The voltage signal output by the second operational amplifier 23 can be output to the controller 30 after analog-to-digital conversion by the second analog-to-digital conversion circuit 24, and of course, in the case where the second isolation circuit 25 is provided, the output of the second analog-to-digital conversion circuit 24 is output to the controller 30 by the second isolation circuit 25.
And a controller 30 connected to the N-channel voltage detection circuit 10, the M-channel current detection circuit 20 and the display device 40, for displaying various electrical parameters on the display device 40 according to the output of the N-channel voltage detection circuit 10 and the output of the M-channel current detection circuit 20.
And a display device 40.
The specific type and model of the controller 30 can be set and adjusted according to actual needs, and can be a DSP or PLC type controller, for example. The electrical parameters displayed on the display device 40 may include the outputs of the N voltage detection circuits 10 and the M current detection circuits 20, and may further include related parameters calculated by the controller 30. For example, after acquiring the outputs of the N-path voltage detection circuit 10 and the M-path current detection circuit 20, the controller 30 determines relevant resistance parameters, reactance parameters, power parameters, and the like through calculation formulas, and displays the calculated parameters and the acquired measurement values on the display device 40. That is, the electrical parameters displayed on the display device 40 may include various parameters directly measured, and there may be related parameters calculated by the measured values.
Of course, the formula on which the controller 30 is based when calculating the relevant electrical parameter is known to the skilled person and may be preset in the controller 30. In addition, because the electrical performance of the low-voltage complete equipment is tested according to different test items, the electrical parameters required to be obtained by the staff may be correspondingly different, and the calculation formula used by the controller 30 may also be correspondingly different. Therefore, in practical applications, the controller 30 may generally receive relevant instructions input by a worker, and then trigger a corresponding calculation mode, so as to display the corresponding electrical parameters on the display device 40. In addition, in consideration of the fact that the display device 40 is provided in the solution of the present application, the display device 40 may also be used to input instructions, for example, the display device 40 is provided with related buttons, keys, a USB interface, and the like, and the worker may input related instructions to the controller 30 through the display device 40, so that the controller 30 triggers a corresponding calculation mode according to information carried in the instructions.
And the power generation device 50 is connected with the controller 30 and used for providing rated current for the electrical performance test of the low-voltage complete equipment when receiving the control signal of the controller 30.
When testing the electrical performance of a low-voltage plant, it is necessary to provide the rated current required for the test, which is conventionally provided by the mains. In the present application, considering that the mains may have an unstable condition, a power generation device 50 connected to the controller 30 is provided, and the power generation device 50 can output a rated current to complete the test. Compared with the mains supply, the probability of current instability caused by the rated current provided by the power supply generating device 50 is reduced, so that the stability of the test is guaranteed, and a more accurate test result is obtained.
Specifically, the display device 40 may be provided with relevant keys, and after the keys are pressed, the display device 40 communicates with the controller 30, and the controller 30 outputs a control signal to the power generating device 50. Of course, in other occasions, the controller 30 may be triggered to output the control signal in other manners according to actual needs, and the implementation of the present invention is not affected.
Use the embodiment of the utility model provides a technical scheme because included N way voltage detection circuit 10 and M way current detection circuit 20 in the testing arrangement for testing arrangement can multiple spot synchronous measurement data, and then controller 30 can show each electrical parameter in real time, compare in traditional scheme unable synchronous acquisition to each data, the testing arrangement of this application has realized the real-time measurement of data, consequently is favorable to improving the degree of accuracy of test, also is favorable to improving efficiency of software testing. In addition, this application can utilize power generation facility 50 to provide rated current for the electric performance test of low pressure complete sets, compares in the traditional method that adopts the commercial power, provides rated current through power generation facility 50 and is favorable to guaranteeing the stability of test. Therefore, the scheme of the application can effectively improve the testing efficiency and the testing accuracy of the electrical performance test of the low-voltage complete equipment, and is favorable for guaranteeing the stability of the test.
In a specific embodiment of the present invention, the present invention can further include:
and a protection device 60 connected to the controller 30 for outputting a termination signal to the controller 30 when the abnormality of the low-voltage plant is detected, so that the controller 30 stops the electrical performance test of the low-voltage plant after receiving the termination signal.
The protection device 60 may determine that the low-voltage complete equipment is abnormal in a plurality of ways, for example, the protection device 60 may test the voltage and the current of a plurality of preset points on the power transmission line of the low-voltage complete equipment, and when the voltage of any one point exceeds a preset voltage value corresponding to the point or the current exceeds a preset current value corresponding to the point, it may determine that the low-voltage complete equipment is abnormal, and then output a termination signal to the controller 30. As another example, a temperature sensor may also be included in the protection device 60, and when the temperature exceeds a corresponding temperature threshold, an abnormality of the low-pressure plant may be determined.
The controller 30 stops the electrical performance test of the low-voltage complete equipment after receiving the termination signal, and specifically, for example, may control the power generating device 50 to stop the current output or switch the current output of the commercial power. In addition, the controller 30 may output a related prompt message on the display device 40 so that the worker can notice the situation in time. In this kind of embodiment, through setting up protection device 60, be favorable to ensureing the security of test.
It should be noted that, in this embodiment, whether the low-voltage plant is abnormal or not is determined by the protection device 60, but in other embodiments, the controller 30 may determine the abnormality, that is, the protection device 60 includes only the relevant detection circuit, and after outputting the corresponding signal to the controller 30, the controller 30 determines whether the low-voltage plant is abnormal or not, which does not affect the implementation of the present invention.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, article, or apparatus that comprises the element.
The principle and the implementation of the present invention are explained herein by applying specific examples, and the above descriptions of the embodiments are only used to help understand the technical solution and the core idea of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (8)
1. An electrical performance testing device of a low-voltage complete equipment is characterized by comprising:
n voltage detection circuits;
m current detection circuits; wherein M and N are positive integers;
the controller is connected with the N voltage detection circuits, the M current detection circuits and the display device and is used for displaying various electrical parameters on the display device according to the output of the N voltage detection circuits and the output of the M current detection circuits;
the display device;
and the power generation device is connected with the controller and used for providing rated current for the electrical performance test of the low-voltage complete equipment when receiving the control signal of the controller.
2. The electrical performance testing device of the low-voltage complete equipment according to claim 1, wherein each of the voltage detection circuits comprises:
the voltage input circuit is used for sampling voltage;
the first operational amplifier is connected with the voltage input circuit;
and the first analog-to-digital conversion circuit is connected with the first operational amplifier and the controller.
3. The electrical performance testing apparatus of a low-voltage complete equipment according to claim 2, wherein each of the voltage detection circuits further comprises:
a voltage divider disposed between the voltage input circuit and the first operational amplifier;
a first isolation circuit disposed between the first analog-to-digital conversion circuit and the controller.
4. The electrical performance testing device of the low-voltage complete equipment according to claim 1, wherein each of the current detection circuits comprises:
the current input circuit is used for sampling current;
the second operational amplifier is connected with the current input circuit;
and the second analog-to-digital conversion circuit is connected with the second operational amplifier and the controller.
5. The electrical performance testing device of the low-voltage complete equipment according to claim 4, wherein each of the current detection circuits further comprises:
a current divider disposed between the current input circuit and the second operational amplifier;
a second isolation circuit disposed between the second analog-to-digital conversion circuit and the controller.
6. The electrical performance testing apparatus of a low-voltage plant according to any one of claims 1 to 5, further comprising:
and the protection device is connected with the controller and used for outputting a termination signal to the controller when the low-voltage complete equipment is detected to be abnormal, so that the controller stops the electrical performance test of the low-voltage complete equipment after receiving the termination signal.
7. The electrical performance testing device of the low-voltage complete equipment according to claim 2, wherein the voltage input circuit is a high-precision voltage transformer.
8. The electrical performance testing device of the low-voltage complete equipment according to claim 4, wherein the current input circuit is a high-precision current transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921699959.3U CN210720564U (en) | 2019-10-11 | 2019-10-11 | Electrical performance testing device of low-voltage complete equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921699959.3U CN210720564U (en) | 2019-10-11 | 2019-10-11 | Electrical performance testing device of low-voltage complete equipment |
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| Publication Number | Publication Date |
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| CN210720564U true CN210720564U (en) | 2020-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921699959.3U Active CN210720564U (en) | 2019-10-11 | 2019-10-11 | Electrical performance testing device of low-voltage complete equipment |
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- 2019-10-11 CN CN201921699959.3U patent/CN210720564U/en active Active
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