Socket tester working circuit and socket tester

Abstract

The utility model relates to a socket tester working circuit and a socket tester. The working circuit of the socket tester comprises a microprocessor module, a wiring state detection module, an insulation state detection module and a display module, the wiring state detection module is connected with a live wire, a zero wire and a ground wire, and the insulation state detection module comprises a first insulation state detection sub-module, a second insulation state detection sub-module and a third insulation state detection sub-module; the first insulation state detection sub-module is connected with a live wire and a zero wire, the second insulation state detection sub-module is connected with a live wire and a ground wire, and the third insulation state detection sub-module is connected with a zero wire and a ground wire; and the microprocessor module is used for determining the wiring states of the live wire, the zero wire and the ground wire of the detected socket and the insulation state between any two of the live wire, the zero wire and the ground wire of the detected socket, and sending the detection result to the display module for displaying. The working circuit of the socket tester can meet diversified test requirements of users and improve the test efficiency of the users.

Description

Technical Field

[0001] The utility model relates to the technical field of socket testers, in particular to a socket tester working circuit and the socket tester. Background Art

[0002] An outlet tester is an instrument used to check the safety of household outlets. It can detect whether the outlets are properly wired and whether there are any leakage problems. By using an outlet tester, you can effectively prevent electrical fires and personal injuries, ensuring a safe home life.

[0003] Socket leakage detection includes testing for leakage between the live and ground wires, between the neutral wire and ground wire, and between the live and neutral wires. In related technologies, socket testers can perform leakage detection between the live and ground wires, as well as between the neutral wire and ground wire. However, testing between the live and neutral wires often requires the use of a megohmmeter. Existing socket testers are unable to perform leakage detection between both wires, severely impacting user testing efficiency. Utility Model Content

[0004] Based on this, it is necessary to provide a socket tester working circuit and a socket tester to address the problem that the existing socket tester cannot simultaneously perform leakage detection between the live wire and the neutral wire, which seriously affects the user experience.

[0005] A socket tester working circuit includes a microprocessor module, a wiring status detection module, an insulation status detection module and a display module, wherein the microprocessor module is connected to the wiring status detection module, the insulation status detection module and the display module respectively;

[0006] The wiring status detection module is used to connect the live wire, neutral wire and ground wire of the tested socket and feed back a first detection signal to the microprocessor module, and the microprocessor module is used to determine the wiring status of the live wire, neutral wire and ground wire of the tested socket according to the first detection signal;

[0007] The insulation state detection module includes a first insulation state detection submodule, a second insulation state detection submodule and a third insulation state detection submodule;

[0008] The first insulation state detection submodule is used to connect the live wire and the neutral wire of the tested socket and feed back a second detection signal to the microprocessor module, and the microprocessor module is used to determine the insulation state between the live wire and the neutral wire of the tested socket according to the second detection signal;

[0009] The second insulation state detection submodule is used to connect the live wire and the ground wire of the tested socket and feed back a third detection signal to the microprocessor module, and the microprocessor module is used to determine the insulation state between the live wire and the ground wire of the tested socket according to the third detection signal;

[0010] The third insulation state detection submodule is used to connect the neutral wire and the ground wire of the tested socket and feed back a fourth detection signal to the microprocessor module, and the microprocessor module is used to determine the insulation state between the neutral wire and the ground wire of the tested socket according to the fourth detection signal;

[0011] The microprocessor module is also used to send the detection results to the display module for display.

[0012] When the above-mentioned microprocessor module is working, the wiring status detection module can feedback a first detection signal to the microprocessor module, and the microprocessor module can determine the wiring status of the live wire, neutral wire and ground wire of the tested socket based on the first detection signal; the first insulation status detection submodule can feedback a second detection signal to the microprocessor module, and the microprocessor module can determine the insulation status between the live wire and neutral wire of the tested socket based on the second detection signal; the second insulation status detection submodule can feedback a third detection signal to the microprocessor module, and the microprocessor module can determine the insulation status between the live wire and ground wire of the tested socket based on the third detection signal; the third insulation status detection submodule can feedback a fourth detection signal to the microprocessor module, and the microprocessor module can determine the insulation status between the neutral wire and ground wire of the tested socket based on the fourth detection signal; the microprocessor module can further send the detection results to the display module for display. Through the mutual cooperation of the microprocessor module, the wiring status detection module, the first insulation status detection submodule, the second insulation status detection submodule, the third insulation status detection submodule and the display module, the microprocessor module can not only determine the wiring status of the live wire, neutral wire and ground wire of the tested socket, but also determine the insulation status between the live wire and the neutral wire, the insulation status between the live wire and the ground wire, and the insulation status between the neutral wire and the ground wire of the tested socket, thereby meeting the user's diverse testing needs and improving the user's testing efficiency.

[0013] In one embodiment, the socket tester working circuit further includes a power supply module and a power on / off control module, wherein the power supply module is respectively connected to the power on / off control module, the microprocessor module, the wiring status detection module, the insulation status detection module and the display module;

[0014] The power supply module is used to provide working power to the microprocessor module, the wiring status detection module, the insulation status detection module and the display module;

[0015] The power on / off control module includes a power on / off button, which is used to control the working state of the power module according to the state of the power on / off button.

[0016] In one embodiment, the power on / off control module is connected to the microprocessor module;

[0017] The microprocessor module is further configured to send an on / off control signal to the on / off control module, and the on / off control module is further configured to control the working state of the power module according to the on / off control signal.

[0018] In one embodiment, the microprocessor module is connected to the first insulation status detection submodule;

[0019] The microprocessor module is used to obtain a sampled voltage signal from the first insulation state detection submodule, and generate the power on / off control signal according to the sampled voltage signal.

[0020] In one embodiment, the socket tester working circuit further includes a detection switching module, which is respectively connected to the socket under test, the wiring status detection module, the insulation status detection module and the microprocessor module;

[0021] The microprocessor module is used to send a detection switching signal to the detection switching module;

[0022] The detection switching module is used to connect the wiring status detection module to the live wire, neutral wire and ground wire of the tested socket according to the detection switching signal, or,

[0023] Connect the insulation status detection module to the live wire, neutral wire and ground wire of the socket to be tested.

[0024] In one embodiment, the detection switching module includes a first single-pole double-throw relay, a second single-pole double-throw relay, and a third single-pole double-throw relay;

[0025] The common end of the first single-pole double-throw relay is connected to the live wire of the socket under test, the normally closed end is used to connect to the wiring status detection module, and the normally open end is used to connect to the first insulation status detection submodule;

[0026] The common terminal of the second single-pole double-throw relay is connected to the neutral line of the socket under test, the normally closed terminal is used to connect to the wiring status detection module, and the normally open terminal is used to connect to the second insulation status detection submodule;

[0027] The common end of the third single-pole double-throw relay is connected to the ground wire of the socket under test, the normally closed end is used to connect to the wiring status detection module, and the normally open end is used to connect to the third insulation status detection submodule.

[0028] In one embodiment, the second insulation state detection submodule and the third insulation state detection submodule use a common insulation state detection circuit, and the detection switching module further includes a fourth single-pole double-throw relay;

[0029] The common end of the fourth single-pole double-throw relay is connected to the common insulation state detection circuit, the normally closed end is used to connect to the normally open end of the second single-pole double-throw relay, and the normally open end is used to connect to the normally open end of the third single-pole double-throw relay.

[0030] In one embodiment, the first insulation state detection submodule includes a step-up transformer;

[0031] The step-up transformer is connected to the power module and is used to obtain a low-voltage reference signal from the power module and convert the low-voltage reference signal into a high-voltage test signal.

[0032] In one embodiment, the microprocessor module includes a single chip microcomputer, and the model of the single chip microcomputer is HY17P60B.

[0033] A socket tester comprises the above-mentioned socket tester working circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the overall structure of the working circuit of the socket tester of the utility model;

[0035] Figure 2 This is a structural diagram of the insulation status detection module in the working circuit of the socket tester of the utility model;

[0036] Figure 3 This is another overall structural diagram of the working circuit of the socket tester of the utility model;

[0037] Figure 4 This is a structural diagram of the detection switching module in the working circuit of the socket tester of the utility model;

[0038] Figure 5 This is a schematic diagram of a connection structure of a detection switching module in the working circuit of the socket tester of the present utility model;

[0039] Figure 6 This is another schematic diagram of the connection structure of the detection switching module in the working circuit of the socket tester of the present utility model. DETAILED DESCRIPTION

[0040] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0041] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only."

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended only to describe specific embodiments and are not intended to limit this invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0043] The utility model relates to a socket tester working circuit and the socket tester.

[0044] like Figures 1 to 2 As shown, the socket tester working circuit includes a microprocessor module 10, a wiring status detection module 20, an insulation status detection module 30 and a display module 40, and the microprocessor module 10 is connected to the wiring status detection module 20, the insulation status detection module 30 and the display module 40 respectively;

[0045] The wiring status detection module 20 is used to connect the live wire L, the neutral wire E and the ground wire N of the tested socket, and feed back a first detection signal to the microprocessor module 10. The microprocessor module 10 is used to determine the wiring status of the live wire L, the neutral wire E and the ground wire N of the tested socket according to the first detection signal;

[0046] The insulation state detection module 30 includes a first insulation state detection submodule 31, a second insulation state detection submodule 32 and a third insulation state detection submodule 33;

[0047] The first insulation state detection submodule 31 is used to connect the live wire L and the neutral wire E of the tested socket and feed back a second detection signal to the microprocessor module 10. The microprocessor module 10 is used to determine the insulation state between the live wire L and the neutral wire E of the tested socket according to the second detection signal;

[0048] The second insulation state detection submodule 32 is used to connect the live wire L and the ground wire N of the tested socket and feed back a third detection signal to the microprocessor module 10. The microprocessor module 10 is used to determine the insulation state between the live wire L and the ground wire N of the tested socket according to the third detection signal;

[0049] The third insulation state detection submodule 33 is used to connect the neutral wire and the ground wire of the tested socket and feed back a fourth detection signal to the microprocessor module 10. The microprocessor module 10 is used to determine the insulation state between the neutral wire E and the ground wire N of the tested socket according to the fourth detection signal;

[0050] The microprocessor module 10 is further configured to send the detection results to the display module 40 for display.

[0051] When the above-mentioned microprocessor module is working, the wiring status detection module 20 can feedback a first detection signal to the microprocessor module 10, and the microprocessor module 10 can determine the wiring status of the live wire L, neutral wire E and ground wire N of the tested socket based on the first detection signal; the first insulation status detection submodule 31 can feedback a second detection signal to the microprocessor module 10, and the microprocessor module 10 can determine the insulation status between the live wire L and the neutral wire E of the tested socket based on the second detection signal; the second insulation status detection submodule 32 can feedback a third detection signal to the microprocessor module 10, and the microprocessor module 10 can determine the insulation status between the live wire L and the ground wire N of the tested socket based on the third detection signal; the third insulation status detection submodule 33 can feedback a fourth detection signal to the microprocessor module 10, and the microprocessor module 10 can determine the insulation status between the neutral wire E and the ground wire N of the tested socket based on the fourth detection signal; the microprocessor module 10 can also further send the detection results to the display module 40 for display. Through the mutual cooperation of the microprocessor module 10, the wiring status detection module 20, the first insulation status detection submodule 31, the second insulation status detection submodule 32, the third insulation status detection submodule 33 and the display module 40, the microprocessor module 10 can not only determine the wiring status of the live wire L, the neutral wire E and the ground wire N of the tested socket, but also can respectively determine the insulation status between the live wire L and the neutral wire E, the insulation status between the live wire L and the ground wire N, and the insulation status between the neutral wire E and the ground wire N of the tested socket, thereby meeting the user's diverse testing needs and improving the user's testing efficiency.

[0052] like Figure 3As shown, the socket tester's operating circuit also includes a power supply module 50 and a power-on / off control module 60. The power supply module 50 is connected to the power-on / off control module 60, the microprocessor module 10, the wiring status detection module 20, the insulation status detection module 30, and the display module 40. Furthermore, the power supply module 50 is connected to the first insulation status detection submodule 31, the second insulation status detection submodule 32, and the third insulation status detection submodule 33. The power supply module 50 is used to provide operating power to the microprocessor module 10, the wiring status detection module 20, the insulation status detection module 30, and the display module 40. The power-on / off control module 60 includes a power button for controlling the operating state of the power supply module 50 based on the state of the power button.

[0053] When the user presses the power button, the power control module 60 can put the power module 50 into working state according to the trigger state of the power button, that is, power is supplied to the microprocessor module 10, the wiring status detection module 20, the insulation status detection module 30 and the display module 40 through the power module 50; when the user releases the power button, the power control module 60 can put the power module 50 into sleep state according to the trigger state of the power button, that is, disconnect the power module 50 from the microprocessor module 10, the wiring status detection module 20, the insulation status detection module 30 and the display module 40, so that the power module 50 no longer supplies power to the microprocessor module 10, the wiring status detection module 20, the insulation status detection module 30 and the display module 40.

[0054] Furthermore, the power on / off control module 60 is connected to the microprocessor module 10. The microprocessor module 10 is further configured to send a power on / off control signal to the power on / off control module 60, and the power on / off control module 60 is further configured to control the working state of the power module 50 according to the power on / off control signal.

[0055] It should be noted that the microprocessor module 10 can also indirectly control the power module 50 by controlling the power on / off control module 60, causing the power module 50 to enter an operating state or a dormant state. Indirect control of the power module 50 by the microprocessor module 10 can protect the socket tester's operating circuit. For example, when the microprocessor module 10 detects an abnormality in the output voltage and / or output current of the power module 50, the power module 50 is put into a dormant state to prevent a malfunction in the socket tester's operating circuit. When the microprocessor module 10 detects that the output voltage and / or output current of the power module 50 have returned to normal, the power module 50 is put into an operating state.

[0056] Furthermore, the microprocessor module 10 is connected to the first insulation state detection submodule 31. The microprocessor module 10 is configured to obtain a sampled voltage signal from the first insulation state detection submodule 31 and generate a power on / off control signal based on the sampled voltage signal. Because the first insulation state detection submodule 31 is connected to the power supply module 50, the microprocessor module 10 can calculate the output voltage of the power supply module 50 based on the sampled voltage signal. If the output voltage of the power supply module 50 is detected to be too low, a power on / off control signal is generated, and the power supply module 50 is controlled to enter a dormant state via the power on / off control module 60. If the output voltage of the power supply module 50 is detected to have returned to normal, a power on / off control signal is generated, and the power supply module 50 is controlled to enter an active state via the power on / off control module 60.

[0057] like Figure 3 As shown, the working circuit of the socket tester also includes a detection switching module 70, which is respectively connected to the socket under test, the wiring status detection module 20, the insulation status detection module 30 and the microprocessor module 10; the microprocessor module 10 is used to send a detection switching signal to the detection switching module 70; the detection switching module 70 is used to connect the wiring status detection module 20 to the live wire L, neutral wire E and ground wire N of the socket under test according to the detection switching signal, or connect the insulation status detection module 30 to the live wire L, neutral wire E and ground wire N of the socket under test.

[0058] In actual work, through the control of the detection switching module 70 by the microprocessor module 10, the wiring status detection module 20 can be first connected to the live wire L, neutral wire E and ground wire N of the socket under test, that is, the wiring status of the live wire L, neutral wire E and ground wire N of the socket under test is measured first, and then the insulation status detection module 30 is connected to the live wire L, neutral wire E and ground wire N of the socket under test, and the insulation status between the live wire L and the neutral wire E of the socket under test, the insulation status between the live wire L and the ground wire N of the socket under test, and the insulation status between the neutral wire E and the ground wire N of the socket under test are measured.

[0059] like Figures 4 to 6 As shown, the detection switching module 70 includes a first single-pole double-throw relay 71, a second single-pole double-throw relay 72 and a third single-pole double-throw relay 73. The first single-pole double-throw relay 71, the second single-pole double-throw relay 72 and the third single-pole double-throw relay 73 are respectively connected to the microprocessor module 10. The microprocessor module 10 is used to control the working status of the first single-pole double-throw relay 71, the second single-pole double-throw relay 72 and the third single-pole double-throw relay 73.

[0060] The common terminal COM1 of the first single-pole double-throw relay 71 is connected to the live wire L of the socket under test, the normally closed terminal NC1 is used to connect to the wiring status detection module 20, and the normally open terminal NO1 is used to connect to the first insulation status detection sub-module 31; the common terminal COM2 of the second single-pole double-throw relay 72 is connected to the neutral wire E of the socket under test, the normally closed terminal NC2 is used to connect to the wiring status detection module 20, and the normally open terminal NO2 is used to connect to the second insulation status detection sub-module 32; the common terminal COM3 of the third single-pole double-throw relay 73 is connected to the ground wire N of the socket under test, the normally closed terminal NC3 is used to connect to the wiring status detection module 20, and the normally open terminal NO3 is used to connect to the third insulation status detection sub-module 33.

[0061] When the microprocessor module 10 controls the common terminal COM1 of the first single-pole double-throw relay 71 to be connected to the normally closed terminal NC1, controls the common terminal COM2 of the second single-pole double-throw relay 72 to be connected to the normally closed terminal NC2, and controls the common terminal COM3 of the third single-pole double-throw relay 73 to be connected to the normally closed terminal NC3, the connection status of the live wire L, neutral wire E and ground wire N of the tested socket can be measured; when the microprocessor module 10 controls the common terminal COM1 of the first single-pole double-throw relay 71 to be connected to the normally open terminal NO1, controls the common terminal COM2 of the second single-pole double-throw relay 72 to be connected to the normally open terminal NO2, and controls the common terminal COM3 of the third single-pole double-throw relay 73 to be connected to the normally open terminal NO3, the insulation status between the live wire L and the neutral wire E of the tested socket, the insulation status between the live wire L and the ground wire N of the tested socket, and the insulation status between the neutral wire E and the ground wire N of the tested socket can be measured respectively.

[0062] Furthermore, the second insulation state detection submodule 32 and the third insulation state detection submodule 33 can utilize a common insulation state detection circuit. The detection switching module 70 further includes a fourth single-pole double-throw relay 74. The fourth single-pole double-throw relay 74 is connected to the microprocessor module 10, and the microprocessor module 10 is configured to control the operating state of the fourth single-pole double-throw relay 74. The common terminal COM4 of the fourth single-pole double-throw relay 74 is connected to the common insulation state detection circuit, the normally closed terminal NC4 is configured to connect to the normally open terminal NO2 of the second single-pole double-throw relay 72, and the normally open terminal NO4 is configured to connect to the normally open terminal NO3 of the third single-pole double-throw relay 73.

[0063] The microprocessor module 10 controls the working states of the second single-pole double-throw relay 72, the third single-pole double-throw relay 73 and the fourth single-pole double-throw relay 74 in combination, and can measure the insulation state between the live wire L and the ground wire N of the tested socket and the insulation state between the neutral wire E and the ground wire N of the tested socket respectively through the common insulation state detection circuit.

[0064] The first insulation state detection submodule 31 includes a step-up transformer connected to the power module 50. The step-up transformer is configured to obtain a low-voltage reference signal from the power module 50 and convert the low-voltage reference signal into a high-voltage test signal. Furthermore, the first insulation state detection submodule 31 can apply the high-voltage test signal between the live wire L and the neutral wire E of the tested socket to measure the insulation state between the live wire L and the neutral wire E of the tested socket.

[0065] The microprocessor module 10 includes a single chip microcomputer, and the signal acquisition, signal processing and signal control of the microprocessor module 10 are completed by the single chip microcomputer. Preferably, the model of the single chip microcomputer is HY17P60B.

[0066] The utility model also discloses a socket tester, which includes the aforementioned socket tester working circuit. Because the socket tester includes the aforementioned socket tester working circuit, the socket tester can not only determine the connection status of the live wire L, neutral wire E, and ground wire N of the tested socket, but can also separately determine the insulation status between the live wire L and the neutral wire E, the insulation status between the live wire L and the ground wire N, and the insulation status between the neutral wire E and the ground wire N of the tested socket, thereby meeting the diverse testing needs of users and improving the user's testing efficiency.

[0067] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A socket tester working circuit, characterized in that: It includes a microprocessor module, a wiring status detection module, an insulation status detection module and a display module, wherein the microprocessor module is connected to the wiring status detection module, the insulation status detection module and the display module respectively; The wiring status detection module is used to connect the live wire, neutral wire and ground wire of the tested socket and feed back a first detection signal to the microprocessor module, and the microprocessor module is used to determine the wiring status of the live wire, neutral wire and ground wire of the tested socket according to the first detection signal; The insulation state detection module includes a first insulation state detection submodule, a second insulation state detection submodule and a third insulation state detection submodule; The first insulation state detection submodule is used to connect the live wire and the neutral wire of the tested socket and feed back a second detection signal to the microprocessor module, and the microprocessor module is used to determine the insulation state between the live wire and the neutral wire of the tested socket according to the second detection signal; The second insulation state detection submodule is used to connect the live wire and the ground wire of the tested socket and feed back a third detection signal to the microprocessor module, and the microprocessor module is used to determine the insulation state between the live wire and the ground wire of the tested socket according to the third detection signal; The third insulation state detection submodule is used to connect the neutral wire and the ground wire of the tested socket and feed back a fourth detection signal to the microprocessor module, and the microprocessor module is used to determine the insulation state between the neutral wire and the ground wire of the tested socket according to the fourth detection signal; The microprocessor module is also used to send the detection results to the display module for display.

2. The socket tester working circuit according to claim 1, characterized in that: The socket tester working circuit further includes a power supply module and a power on / off control module, wherein the power supply module is respectively connected to the power on / off control module, the microprocessor module, the wiring status detection module, the insulation status detection module and the display module; The power supply module is used to provide working power to the microprocessor module, the wiring status detection module, the insulation status detection module and the display module; The power on / off control module includes a power on / off button, which is used to control the working state of the power module according to the state of the power on / off button.

3. The socket tester working circuit according to claim 2, characterized in that: The power on / off control module is connected to the microprocessor module; The microprocessor module is further configured to send an on / off control signal to the on / off control module, and the on / off control module is further configured to control the working state of the power module according to the on / off control signal.

4. The socket tester working circuit according to claim 3, characterized in that: The microprocessor module is connected to the first insulation status detection submodule; The microprocessor module is used to obtain a sampled voltage signal from the first insulation state detection submodule, and generate the power on / off control signal according to the sampled voltage signal.

5. The socket tester working circuit according to any one of claims 1 to 4, characterized in that: The socket tester working circuit further includes a detection switching module, which is respectively connected to the socket under test, the wiring status detection module, the insulation status detection module and the microprocessor module; The microprocessor module is used to send a detection switching signal to the detection switching module; The detection switching module is used to connect the wiring status detection module to the live wire, neutral wire and ground wire of the tested socket according to the detection switching signal, or, Connect the insulation status detection module to the live wire, neutral wire and ground wire of the socket to be tested.

6. The socket tester working circuit according to claim 5, characterized in that: The detection switching module includes a first single-pole double-throw relay, a second single-pole double-throw relay and a third single-pole double-throw relay; The common end of the first single-pole double-throw relay is connected to the live wire of the socket under test, the normally closed end is used to connect to the wiring status detection module, and the normally open end is used to connect to the first insulation status detection submodule; The common terminal of the second single-pole double-throw relay is connected to the neutral line of the socket under test, the normally closed terminal is used to connect to the wiring status detection module, and the normally open terminal is used to connect to the second insulation status detection submodule; The common end of the third single-pole double-throw relay is connected to the ground wire of the socket under test, the normally closed end is used to connect to the wiring status detection module, and the normally open end is used to connect to the third insulation status detection submodule.

7. The socket tester working circuit according to claim 6, characterized in that: The second insulation state detection submodule and the third insulation state detection submodule use a common insulation state detection circuit, and the detection switching module further includes a fourth single-pole double-throw relay; The common end of the fourth single-pole double-throw relay is connected to the common insulation state detection circuit, the normally closed end is used to connect to the normally open end of the second single-pole double-throw relay, and the normally open end is used to connect to the normally open end of the third single-pole double-throw relay.

8. The socket tester working circuit according to claim 2, characterized in that: The first insulation state detection submodule includes a step-up transformer; The step-up transformer is connected to the power module and is used to obtain a low-voltage reference signal from the power module and convert the low-voltage reference signal into a high-voltage test signal.

9. The socket tester working circuit according to claim 1, characterized in that: The microprocessor module includes a single chip microcomputer, and the model of the single chip microcomputer is HY17P60B.

10. A socket tester, characterized in that: The socket tester includes the socket tester working circuit according to any one of claims 1 to 9.

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