Portable leakage current testing tool

Abstract

The utility model provides a portable test tool for leakage current, and belongs to the technical field of detection. A portable leakage current testing tool comprises a box body which is provided with a main switch, a voltage reduction module, an ampere meter, a control panel, two testing interfaces, a mains supply interface, a voltage stabilization source interface and two relays. The mains supply interface is electrically connected with the step-down module, the step-down module is electrically connected with the control panel and the ampere meter, and the control panel is electrically connected with the relay and used for controlling closing of the relay; one ends of the two relays are electrically connected with the two test interfaces respectively, and the other ends of the two relays are electrically connected with the ampere meter and the voltage stabilization source interface respectively; the voltage stabilization source interface is electrically connected with the ammeter.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of detection, especially a portable test tool for leakage current. BACKGROUND

[0002] In the field of leakage current test of chapter 16 in standard GB / T 4706.1-2024 of household electrical products, currently, multimeter and stopwatch are mainly used for detection, and this detection mode needs two persons to operate the wiring of multimeter and the use of stopwatch respectively, and manually records parameters.

[0003] The prior art has the following disadvantages: complex operation, external line is messy, power safety factor is low, professional personnel are needed to operate and read, and it is inconvenient for ordinary users or non-professionals to use. SUMMARY

[0004] The utility model discloses a portable test tool for leakage current, which has the characteristics of convenient testing and simple operation.

[0005] The utility model discloses a portable test tool for leakage current, which has the characteristics of convenient testing and simple operation.

[0006] A portable test tool for leakage current, comprising: a box body, the box body is provided with a main switch, a voltage reduction module, an ammeter, a control panel, two test interfaces, a commercial power supply interface, a voltage stabilizing source interface and two relays; the commercial power supply interface is electrically connected with the voltage reduction module; the voltage reduction module is electrically connected with the control panel and the ammeter respectively; the control panel is electrically connected with the relays and is used for controlling the closure of the relays; one end of the two relays is respectively electrically connected with the two test interfaces; the other end of the two relays is respectively electrically connected with the ammeter and the voltage stabilizing source interface; the voltage stabilizing source interface is electrically connected with the ammeter.

[0007] In the above-mentioned portable test tool for leakage current, a stopwatch is further included, and the control panel and the stopwatch are used for displaying test timing information in real time.

[0008] In the above-mentioned portable test tool for leakage current, the ammeter is a low-impedance ammeter.

[0009] In the above-mentioned portable test tool for leakage current, a display window is formed in the box body for screen display of the ammeter.

[0010] In the above-mentioned portable test tool for leakage current, a display port is formed in the box body for display of the stopwatch.

[0011] In the above-mentioned portable test tool for leakage current, the upper plate surface of the box body comprises the display window, the display port, the main switch and the two test interfaces.

[0012] The rear plate surface of the box has a voltage stabilizer interface and a commercial power interface.

[0013] Compared with the prior art, the application has the following advantages:

[0014] The integrated design integrates power management, measurement and control in the same box, reduces external wiring complexity, and reduces operation steps through the unified control of the main switch. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 is the layout of the upper plate surface of the box in the application;

[0016] Fig. 2 is the layout of the rear plate surface of the box in the application;

[0017] Fig. 3 is the connection diagram of the template structure in the application;

[0018] In the figure,

[0019] 2, the box;

[0020] 3, the main switch;

[0021] 4, the voltage reduction module;

[0022] 5, the ammeter;

[0023] 6, the control panel;

[0024] 7, the test interface;

[0025] 8, the commercial power interface;

[0026] 9, the voltage stabilizer interface;

[0027] 10, the relay. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the application.

[0029] As Figs. 1 to 3As shown, a leakage current portable test tool, comprising: a box 2, the box 2 has a total switch 3, a voltage reduction module 4, an ammeter 5, a control panel 6, two test interfaces 7, a power supply interface 8, a voltage source interface 9, two relays 10; the power supply interface 8 is electrically connected with the voltage reduction module 4, the voltage reduction module 4 is electrically connected with the control panel 6 and the ammeter 5 respectively, the control panel 6 is electrically connected with the relay 10 and used for controlling the closure of the relay 10; one end of the two relays 10 is respectively electrically connected with the two test interfaces 7, the other end of the two relays 10 is respectively electrically connected with the ammeter 5 and the voltage source interface 9; the voltage source interface 9 is electrically connected with the ammeter 5.

[0030] After the power supply interface 8 is connected with the alternating current power supply, the total switch 3 is used for controlling the on-off; after the power supply is reduced to the safe and appropriate voltage by the voltage reduction module 4, the control panel 6 (used for providing the driving signal for the relay 10) and the ammeter 5 (used for measuring the leakage current) are respectively connected. The relay 10 is closed or opened under the instruction of the control panel 6, and the measured line (through the two test interfaces 7) is respectively connected with the ammeter 5 or the voltage source. The voltage source interface 9 can provide the stable voltage for the measured object, so as to test the leakage. The test interface 7 can be used for inserting the measuring circuit components.

[0031] The integrated design integrates the power management, measurement and control in the same box 2, reduces the complexity of external wiring, and reduces the operation steps through the unified control on-off or power-off of the total switch 3.

[0032] Specifically, it also includes a stopwatch, the control panel 6 is connected with the stopwatch, and is used for displaying the test timing information in real time.

[0033] In addition to driving the relay 10, the control panel 6 is also connected with the stopwatch through a digital or analog signal interface. When the test starts, the control panel 6 triggers the relay 10 to close at the same time, and starts the stopwatch; when the test ends (the relay 10 is opened or manually stopped), the stopwatch automatically stops timing, and records the test duration in real time. The start-stop control of the stopwatch is controlled by one key of the control panel 6, and the control panel 6 adopts a programmable PLC control panel 6.

[0034] Specifically, the ammeter 5 is a low-impedance ammeter 5.

[0035] By using the low-impedance ammeter 5, the leakage current of the order of milliamperes or even microamperes can be accurately measured in the case that a very small additional resistance is introduced in the measured line, the measurement sensitivity and accuracy are improved, and the subtle leakage current can be detected.

[0036] Specifically, a display window for the screen display of the ammeter 5 is formed on the box 2.

[0037] The timing information can be viewed in real time without carrying or observing an independent stopwatch.

[0038] Specifically, the box 2 is provided with a display port for displaying the stopwatch.

[0039] Specifically, the upper plate surface of the box 2 comprises a display window, a display port, a main switch 3 and two test interfaces 7.

[0040] The display window, the display port, the main switch 3 and the two test interfaces 7 are arranged on the upper plate surface, which is convenient for the user to directly look down and operate on the operation table or the workbench.

[0041] Specifically, the rear plate surface of the box 2 is provided with a voltage stabilizer interface 9 and a mains interface 8.

[0042] It should be noted that all directional indications, such as upper, lower, left, right, front, back, etc., in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture, as shown in the drawings, and if the specific posture changes, the directional indications will also change accordingly.

[0043] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features indicated or implicitly indicating the number of technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. At the same time, the meaning of "and / or" appearing throughout the text is to include three schemes, taking "A and / or B" as an example, including A scheme, or B scheme, or A and B schemes. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled personnel in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection claimed by the present application.

[0044] The above components are all general standard components or components known to those skilled in the art, and their structure and principle can be known by those skilled in the art through technical manuals or through conventional experimental methods.

[0045] The specific embodiments described herein are merely illustrative of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but without deviating from the present application or exceeding the scope defined by the appended claims.

Claims

1. A portable test fixture for leakage current, characterized by, The utility model relates to a kind of test box, including: Box (2), total switch (3) is had on the box (2), voltage reduction module (4), ammeter (5), control panel (6), two test interfaces (7), mains interface (8), voltage source interface (9), two relays (10);The mains interface (8) is electrically connected with voltage reduction module (4), and voltage reduction module (4) is electrically connected with control panel (6), ammeter (5) respectively, and control panel (6) is electrically connected with the relay (10) and is used to control the closure of relay (10);Two relays (10) one end is electrically connected with two test interfaces (7) respectively, and the other end of two relays (10) is electrically connected with ammeter (5) and voltage source interface (9) respectively;The voltage source interface (9) is electrically connected with ammeter (5).

2. The portable test fixture of claim 1, wherein, It also includes a stopwatch, the control panel (6) is used to display test timing information in real time with the stopwatch.

3. The portable test fixture of claim 1, wherein, The ammeter (5) is a low-impedance ammeter (5).

4. The leakage current portable test fixture of claim 3, wherein, The box (2) is provided with a display window for the screen display of the ammeter (5).

5. The leakage current portable test fixture of claim 4, wherein, The box (2) is provided with a display port for the display of the stopwatch.

6. The leakage current portable test fixture of claim 5, wherein, The upper plate surface of the box (2) includes the display window, the display port, the total switch (3) and the two test interfaces (7).

7. The leakage current portable test fixture of claim 1, wherein, The rear plate surface of the box (2) has the voltage source interface (9) and the mains interface (8).

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