CN112611951A - RCD (remote control device) online test system and test method thereof - Google Patents
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- CN112611951A CN112611951A CN202011360097.9A CN202011360097A CN112611951A CN 112611951 A CN112611951 A CN 112611951A CN 202011360097 A CN202011360097 A CN 202011360097A CN 112611951 A CN112611951 A CN 112611951A
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- 238000012360 testing method Methods 0.000 title claims abstract description 32
- 238000010998 test method Methods 0.000 title claims abstract description 7
- 238000001514 detection method Methods 0.000 claims abstract description 57
- 230000009471 action Effects 0.000 claims abstract description 34
- 238000000034 method Methods 0.000 claims abstract description 16
- 230000001012 protector Effects 0.000 claims abstract description 4
- 238000012545 processing Methods 0.000 claims description 10
- 230000003750 conditioning effect Effects 0.000 claims 2
- 238000007689 inspection Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 4
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- 239000003990 capacitor Substances 0.000 description 1
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- 238000009776 industrial production Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
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Abstract
The application discloses surplus action current protector (RCD) on-line test system and test method thereof, the system includes: RCD, detection device, leakage current loop; the detection device is respectively connected with the RCD and the leakage current loop. This application is through directly switching on detection device in the circuit at the RCD place of waiting to examine, whether it is qualified to examine RCD, and need not demolish the former wiring of RCD, inspects again for the testing process is simpler, has reduced work load, and has improved inspection efficiency greatly.
Description
Technical Field
The application relates to the field of electrical detection, in particular to an RCD (remote control device) online test system and a test method thereof.
Background
Residual Current protectors (RCDs) are widely applied to industrial and agricultural production and daily life as safety measures which must be taken in standard electrical design regulations. The RCD is an effective protection measure for preventing personal electric shock, electrical fire and electrical equipment damage, so that it is important to regularly check whether the RCD is qualified, and the RCD is not only in terms of normal use but also in terms of life and property safety.
In the prior art, the RCD is usually required to be detached from a working circuit and then detected in a laboratory, the process is complicated, and the RCD is large in using amount, so that the laboratory detection workload is large and the efficiency is low, and the improvement of the annual picking rate is limited for a long time, so that the detection device capable of rapidly detecting the RCD on line is developed, and the detection device has positive practical significance.
Disclosure of Invention
In order to solve the above problems, the present application provides an RCD online test system and a test method thereof, and specifically adopts the following technical scheme:
in one aspect, the present application provides an RCD online test system, which includes:
a residual current protector RCD for disconnecting the circuit when the residual current of the circuit reaches the residual action current thereof;
a leakage current loop respectively connected with the RCD and the detection device;
and the detection device is respectively connected with the RCD and the leakage current loop and is used for detecting whether the RCD is qualified or not.
Optionally, the detection device includes: the device comprises a detection module, a central processing module and a power supply adjusting module;
the central processing module is respectively connected with one end of the detection module and one end of the power supply adjusting module.
Optionally, the detection apparatus further includes a first input terminal and a second input terminal, the first input terminal is connected to the leakage current loop and the other end of the detection module, and the second input terminal is connected to the RCD and the other end of the power supply adjustment module.
Optionally, the power supply adjustment module comprises a power supply component and an automatic voltage adjustment component.
Optionally, the power supply assembly comprises two sets of current generators, each set of current generators being operable to output an alternating residual current or a pulsating residual current.
Optionally, the test system further includes a load resistor, one end of the load resistor is connected to the power supply adjusting module, and the other end of the load resistor is grounded.
Optionally, the detection device further comprises a display module.
In another aspect, an RCD online testing method is provided, where the method is applied to the testing system described above, and includes:
increasing the output current of the detection device until the RCD acts;
detecting the current of the leakage current loop;
obtaining the residual action current of the RCD according to the output current and the current of the leakage current loop;
restoring the RCD, and instantly increasing the output current of the detection device from 0 to the corresponding output current when the RCD is operated;
obtaining a segment time according to a time interval from when the output current reaches the time that the RCD can be enabled to act to the RCD;
and judging whether the RCD is qualified or not according to the residual action current and the breaking time.
Optionally, the obtaining the residual action current of the RCD according to the output current and the current of the leakage current loop includes: according to formula I△＝I1△+I2△Obtaining the residual action current of the RCD;
wherein, I△Represents the residual operating current, I, of the RCD1△Indicating the output current of the detector during RCD operation, I2△The current of the leakage current circuit during the RCD operation is shown.
Optionally, the method further comprises: comparing the residual action current with a rated residual action current, and comparing the segment time with a rated segment time;
and judging whether the RCD is qualified or not according to the comparison result.
Compared with the prior art, the invention has the following beneficial effects: this application RCD's on-line test system examines whether RCD is qualified through with detection device lug connection in the working circuit at the RCD place of waiting to examine, and need not tear RCD down earlier as in the prior art, inspects again, compares in prior art, and inspection method is simpler, and has improved inspection efficiency greatly.
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 embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic structural diagram of an RCD online test system according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a detection apparatus according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Firstly, whether the RCD is qualified is detected mainly by detecting whether the residual action current and the breaking time of the RCD are qualified, wherein the residual action current is the current when the RCD free shedding mechanism acts, and the breaking time is the time interval from the moment when the residual action current is reached to the moment when all electric arcs are extinguished. And judging that the RCD is qualified only when the residual action current meets the current value specified by the national standard of the product and the breaking time is within the time specified by the national standard of the product.
The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of an online test system of an RCD according to an embodiment of the present application, where the system includes an RCD for disconnecting a circuit when a residual current of the circuit reaches a residual operating current thereof; a leakage current loop respectively connected with the RCD and the detection device; and the detection device is respectively connected with the RCD and the leakage current loop and is used for detecting whether the RCD is qualified or not. Which is an equivalent circuit schematic formed by the leakage current present in normal circuit use. In this application with detection device lug connection in the circuit that RCD protected, and need not pull down RCD from the circuit and be connected with detection device and detect whether qualified, the process is simple, and inspection efficiency is high.
Optionally, the leakage circuit loop is specifically represented by an equivalent resistor R0 in parallel with a capacitor C. The other loads in the test circuit are represented by equivalent resistance R1, and load equivalent resistance R1 is connected in parallel with the leakage circuit loop. Therefore, the detection device is directly connected with the circuit protected by the RCD for qualification test, the RCD does not need to be detached, and the method is simple and high in efficiency.
Referring to fig. 2, a schematic structural diagram of a detection device is shown, the detection device includes: the device comprises a detection module 21, a central processing module 22 and a power supply adjusting module, wherein the central processing module 22 is respectively connected with the detection module 21 and the power supply adjusting module. The detection module 21 is configured to detect a current of the leakage current loop and various electrical parameters required to be detected and analyzed in the device; the central processing module 22 is configured to: sending a control instruction for adjusting the power supply to the power supply adjusting module, receiving the detection information of the detection module 21, and processing the detection information; and the power supply adjusting module is used for adjusting the power supply according to the control instruction sent by the central processing module and outputting the adjusted power supply to the loop where the RCD is located.
Optionally, in conjunction with fig. 1 and fig. 2, the detection apparatus further includes a first input terminal (port 3 in fig. 2) and a second input terminal (ports 1 and 2 in fig. 2, or ports Ua and U0 in fig. 2), the first input terminal is connected to the leakage current loop, the detection module 21 detects the current of the leakage current loop through the first input terminal, and the second input terminal is connected to the RCD and the power supply regulation module.
Optionally, the power supply adjusting module comprises a power supply assembly 23 and an automatic voltage adjusting assembly 24, the power supply assembly 23 is configured to modulate the power supply flowing through the RCD into a desired ac residual current or a desired pulsating dc residual current, then the power supply assembly 23 outputs the ac residual current and/or the pulsating dc residual current, and then the magnitude of the ac residual current and/or the pulsating dc residual current is adjusted by the automatic voltage adjusting assembly 24, and then the adjusted current (i.e., the output current of the power supply adjusting module) is applied to the RCD. In consideration of the fact that in the practical use of the RCD, various conditions can occur in the circuit, such as alternating current residual current or pulse direct current residual current, the application inspects the RCD by applying the alternating current residual current or the pulse direct current residual current, and further ensures the accuracy of qualified inspection of the RCD so as to further ensure the safety.
Alternatively, the power supply module 22 may include two sets of current adjusting devices, each set of current adjusting device may output ac current or pulsating dc current, and if only ac residual current or only pulsating dc residual current is detected, only one set of current adjusting device needs to be gated.
Optionally, the test system further includes a load resistor R2, one end of which is connected to the power supply adjusting module, and the other end of which is grounded, the constant current control resistor R2 is mainly used for properly increasing the output power of the residual current generated by the detection device to improve the measurement accuracy and the operation stability of the detection device, and the load resistor R2 may be built in the detection device or externally mounted on the detection device, for example: when the current is small, such as 5mA and 10mA, an internal connection mode can be adopted, and when the current is large, an external connection mode can be adopted.
Optionally, the detection apparatus further includes an input/output module. The input and output module may be configured to receive an input signal from a user or output a test result, and further, the detection apparatus may further include a display module, where the display module is configured to display the detection data and/or the test result, and may include at least one of: whether the residual action current and the breaking time are qualified or not, and the detected residual action current and the breaking time are displayed respectively. So that the user can visually see the detection result.
The application provides an RCD on-line test system can realize examining whether it is qualified in RCD's normal use circuit, and need not pull down RCD from using the circuit and examine alone, makes the testing process answer more briefly like this, improves RCD's inspection efficiency greatly.
In addition, the present application also provides an online testing method of an RCD, the method is applicable to the above online testing system, and specifically, the method includes:
the detection device stably increases the output current thereof, applies the output current to the RCD until the free shedding structure of the RCD acts (plays the protection role at the moment), and the output current is I1△Detecting the current I of the leakage current loop2△Then according to the output current I when the RCD is operated1△And I2△Obtaining the residual action current I of the RCD△(ii) a After obtaining the residual action current of the RCD, manually restoring the RCD, and then increasing the output current of the detection device from zero to I instantly1△Obtaining instantaneous increase from output current to I1△Starting a time interval from the RCD disconnection, wherein the time interval is the disconnection time; and judging whether the RCD is qualified or not according to the residual action current and the breaking time.
Optionally, the step of the detecting device steadily increasing its output current, and applying the output current to the RCD until the free-release structure of the RCD is actuated (to play its protective role at this time) includes: and the power supply adjusting module adjusts the power supply according to the control instruction sent by the central processing module and applies the adjusted power supply to the RCD. Further, the power supply adjusting module comprises a power supply component and an automatic voltage regulating component, and then the power supply adjusting process comprises the following steps: the power supply assembly modulates a power supply into required alternating current residual current and/or pulsating direct current residual current, then the current of the power supply assembly is adjusted through the automatic voltage regulating assembly, the output of the power supply assembly is applied to the RCD until the RCD acts, and the output current at the moment is I1△。
Optionally, according to output current I when RCD acts1△And I2△Obtaining the residual action current I of the RCD△The method comprises the following steps: according to formula I△＝I1△+I2△The remaining operating current of the RCD is determined.
The method also comprises the steps of comparing the residual action current with the rated residual action current, comparing the segment time with the rated segment time, and judging whether the RCD meets the national standard regulation or not and is qualified or not, so that the rated residual action current and the rated segment time can be preset, and whether the RCD is qualified or not can be judged only by comparing the residual action current and the breaking time of the RCD to be detected with the corresponding preset rated value.
Further, a first threshold value and a second threshold value can be preset, and if the absolute value of the difference value between the residual action current and the rated residual action current is smaller than the first threshold value, the residual action current of the RCD is qualified; and if the absolute value of the difference value between the breaking time and the rated breaking time is smaller than a second threshold, the breaking time of the RCD is qualified, and the RCD is qualified as long as the residual action current and the breaking time are qualified.
The method can further comprise displaying the inspection result, wherein the display content comprises at least one item of: whether the residual action current and the breaking time are qualified or not, and the detected residual action current and the breaking time are displayed respectively. So that the user can visually see the detection result.
The application provides a test method, need not to wait to examine RCD and pull down from the circuit, take the laboratory and test again, but between connect detection device in the return circuit that RCD belongs to, promptly detection device connects RCD normal operating loop.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. An RCD online test system, comprising:
a residual current protector RCD for disconnecting the circuit when the residual current of the circuit reaches the residual action current thereof;
a leakage current loop respectively connected with the RCD and the detection device;
and the detection device is respectively connected with the RCD and the leakage current loop and is used for detecting whether the RCD is qualified or not.
2. The test system of claim 1, wherein the detection device comprises: the device comprises a detection module, a central processing module and a power supply adjusting module;
the central processing module is respectively connected with one end of the detection module and one end of the power supply adjusting module.
3. The test system of claim 2, wherein the detection device further comprises a first input terminal and a second input terminal, the first input terminal is connected to the leakage current loop and the other end of the detection module, and the second input terminal is connected to the RCD and the other end of the power conditioning module.
4. The test system of claim 2, wherein the power regulation module comprises a power component and an auto voltage regulation component.
5. The test system of claim 4, wherein the power supply assembly comprises two sets of current generators, each set of current generators operable to output an alternating residual current or a pulsating residual current.
6. The test system of claim 2, further comprising a load resistor, wherein one end of the load resistor is connected to the power conditioning module and the other end of the load resistor is grounded.
7. The test system of claim 1, wherein the detection device further comprises a display module.
8. An RCD online testing method, the method being applied to the testing system according to any one of claims 1 to 7, comprising:
increasing the output current of the detection device until the RCD acts;
detecting the current of the leakage current loop;
determining the residual action current of the RCD according to the output current and the current of the leakage current loop;
restoring the RCD, and instantly increasing the output current of the detection device from 0 to the corresponding output current when the RCD is operated;
determining a breaking time according to a time interval from when the output current reaches a value enabling the RCD to act to the RCD;
and judging whether the RCD is qualified or not according to the residual action current and the breaking time.
9. The method according to claim 8, wherein the deriving the residual operating current of the RCD according to the output current and the current of the leakage current loop comprises: according to formula I△＝I1△+I2△Determining the residual action current of the RCD;
wherein, I△Represents the residual operating current, I, of the RCD1△Indicating the output current of the detector during RCD operation, I2△The current of the leakage current circuit during the RCD operation is shown.
10. The method of testing of claim 8, further comprising:
comparing the residual action current with rated residual action current, and comparing the breaking time with rated breaking time;
and judging whether the RCD is qualified or not according to the comparison result.
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