Socket tester working circuit and socket tester

Abstract

The invention 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. According to the working circuit of the socket tester, diversified test requirements of users can be met, and the test efficiency of the users is improved.

Description

Technical Field

[0001] This invention relates to the field of socket tester technology, and in particular to a socket tester working circuit and a socket tester. Background Technology

[0002] A socket tester is an instrument used to test the safety of household sockets. It can detect whether the socket wiring is correct and whether there are any problems such as leakage. By using a socket tester, electrical fires and personal injuries can be effectively prevented, ensuring the safety of home life.

[0003] Socket leakage current detection includes leakage detection between the live wire and the ground wire, between the neutral wire and the ground wire, and between the live wire and the neutral wire. In related technologies, socket testers can detect leakage between the live wire and the ground wire, and between the neutral wire and the ground wire. However, detecting leakage between the live wire and the neutral wire often requires the use of a megohmmeter. This means that existing socket testers cannot simultaneously perform leakage detection between the live wire and the neutral wire, severely impacting the user's testing efficiency. Summary of the Invention

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

[0005] A socket tester 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. The wiring status detection module is used to connect the live wire, neutral wire and ground wire of the socket under test, and to feed back a first detection signal to the microprocessor module. The microprocessor module is used to determine the wiring status of the live wire, neutral wire and ground wire of the socket under test based on the first detection signal. The insulation condition detection module includes a first insulation condition detection submodule, a second insulation condition detection submodule, and a third insulation condition detection submodule. The first insulation condition detection submodule is used to connect the live wire and the neutral wire of the socket under test, and to feed back a second detection signal to the microprocessor module. The microprocessor module is used to determine the insulation condition between the live wire and the neutral wire of the socket under test based on the second detection signal. The second insulation condition detection submodule is used to connect the live wire and the ground wire of the socket under test, and to feed back a third detection signal to the microprocessor module. The microprocessor module is used to determine the insulation condition between the live wire and the ground wire of the socket under test based on the third detection signal. The third insulation condition detection submodule is used to connect the neutral wire and the ground wire of the socket under test, and to feed back a fourth detection signal to the microprocessor module. The microprocessor module is used to determine the insulation condition between the neutral wire and the ground wire of the socket under test based on the fourth detection signal. The microprocessor module is also used to send the detection results to the display module for display.

[0006] When the aforementioned microprocessor module is operating, the wiring status detection module can feed back a first detection signal to the microprocessor module, which can then determine the wiring status of the live, neutral, and ground wires of the tested socket based on the first detection signal. The first insulation status detection submodule can feed back a second detection signal to the microprocessor module, which can then determine the insulation status between the live and neutral wires of the tested socket based on the second detection signal. The second insulation status detection submodule can feed back a third detection signal to the microprocessor module, which can then determine the insulation status between the live and ground wires of the tested socket based on the third detection signal. The third insulation status detection submodule can feed back a fourth detection signal to the microprocessor module, which can then determine the insulation status between the neutral and ground wires of the tested socket based on the fourth detection signal. The microprocessor module can also further send the detection results to the display module for display. Through the cooperation of the microprocessor module, wiring status detection module, first insulation status detection submodule, second insulation status detection submodule, third insulation status detection submodule, and display module, the microprocessor module can not only determine the wiring status of the live wire, neutral wire, and ground wire of the socket under test, but also determine the insulation status between the live wire and neutral wire, the live wire and ground wire, and the neutral wire and ground wire, respectively. This meets the diverse testing needs of users and improves their testing efficiency.

[0007] In one embodiment, the socket tester's operating circuit further includes a power supply module and a power on / off control module. The power supply module is 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, respectively. The power module is used to provide operating 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, used to control the operating state of the power module according to the state of the power on / off button.

[0008] In one embodiment, the power-on / off control module is connected to the microprocessor module; The microprocessor module is also used to send a power-on / off control signal to the power-on / off control module, and the power-on / off control module is also used to control the operating state of the power module according to the power-on / off control signal.

[0009] In one embodiment, the microprocessor module is connected to the first insulation state detection submodule; The microprocessor module is used to acquire a sampled voltage signal from the first insulation state detection submodule and generate the power-on / off control signal based on the sampled voltage signal.

[0010] In one embodiment, the socket tester's operating circuit further includes a detection switching module, which is connected to the socket under test, the wiring status detection module, the insulation status detection module, and the microprocessor module, respectively. 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 socket under test according to the detection switching signal, or... Connect the insulation condition detection module to the live wire, neutral wire, and ground wire of the socket under test.

[0011] 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; The common terminal of the first single-pole double-throw relay is connected to the live wire 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 first insulation status detection submodule. The common terminal of the second single-pole double-throw relay is connected to the neutral wire 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 terminal of the third single-pole double-throw relay is connected to the ground wire 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 third insulation status detection submodule.

[0012] In one embodiment, the second insulation state detection submodule and the third insulation state detection submodule adopt a common insulation state detection circuit, and the detection switching module further includes a fourth single-pole double-throw relay; The common terminal of the fourth single-pole double-throw relay is connected to the common insulation state detection circuit, the normally closed terminal is used to connect to the normally open terminal of the second single-pole double-throw relay, and the normally open terminal is used to connect to the normally open terminal of the third single-pole double-throw relay.

[0013] In one embodiment, the first insulation condition detection submodule includes a step-up transformer; The step-up transformer is connected to the power supply module and is used to obtain a low-voltage reference signal from the power supply module and convert the low-voltage reference signal into a high-voltage test signal.

[0014] In one embodiment, the microprocessor module includes a microcontroller, the model of which is HY17P60B.

[0015] A socket tester, the socket tester including the above-described socket tester operating circuit. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the working circuit of the socket tester of the present invention; Figure 2 This is a schematic diagram of the insulation status detection module in the working circuit of the socket tester of the present invention; Figure 3 This is another overall structural diagram of the working circuit of the socket tester of the present invention; Figure 4 This is a schematic diagram of the detection switching module in the working circuit of the socket tester of the present invention; Figure 5 This is a schematic diagram of a connection structure of the detection switching module in the working circuit of the socket tester of the present invention; Figure 6 This is a schematic diagram of another connection structure of the detection switching module in the working circuit of the socket tester of the present invention. Detailed Implementation

[0017] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0018] It should be noted that when an element is said to be "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is said to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. Conversely, when an element is said to be "directly on" another element, there is no intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] This invention relates to a working circuit for a socket tester and the socket tester itself.

[0021] like Figures 1 to 2 As shown, the working circuit of the socket tester includes a microprocessor module 10, a wiring status detection module 20, an insulation status detection module 30, and a display module 40. 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. The wiring status detection module 20 is used to connect the live wire L, neutral wire E and ground wire N of the socket under test, 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, neutral wire E and ground wire N of the socket under test based on the first detection signal. The insulation condition detection module 30 includes a first insulation condition detection submodule 31, a second insulation condition detection submodule 32, and a third insulation condition detection submodule 33; The first insulation condition detection submodule 31 is used to connect the live wire L and the neutral wire E of the socket under test, and to feed back a second detection signal to the microprocessor module 10. The microprocessor module 10 is used to determine the insulation condition between the live wire L and the neutral wire E of the socket under test based on the second detection signal. The second insulation condition detection submodule 32 is used to connect the live wire L and the ground wire N of the socket under test, and to feed back a third detection signal to the microprocessor module 10. The microprocessor module 10 is used to determine the insulation condition between the live wire L and the ground wire N of the socket under test based on the third detection signal. The third insulation condition detection submodule 33 is used to connect the neutral wire and the ground wire of the socket under test and to feed back the fourth detection signal to the microprocessor module 10. The microprocessor module 10 is used to determine the insulation condition between the neutral wire E and the ground wire N of the socket under test based on the fourth detection signal. The microprocessor module 10 is also used to send the detection results to the display module 40 for display.

[0022] When the aforementioned microprocessor module is working, the wiring status detection module 20 can feed back 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 feed back 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 neutral wire E of the tested socket based on the second detection signal; the second insulation status detection submodule 32 can feed back 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 ground wire N of the tested socket based on the third detection signal; the third insulation status detection submodule 33 can feed back 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 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 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, neutral wire E, and ground wire N of the socket under test, but also determine the insulation status between the live wire L and neutral wire E, the insulation status between the live wire L and ground wire N, and the insulation status between the neutral wire E and ground wire N, thus meeting the diverse testing needs of users and improving their testing efficiency.

[0023] like Figure 3 As 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. Further, 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 provides 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 on / off button, used to control the operating state of the power supply module 50 according to the state of the power on / off button.

[0024] When the user presses the power button, the power-on / off control module 60 can activate the power module 50 to operate based on the button's activation state. This means the power module 50 supplies power to the microprocessor module 10, wiring status detection module 20, insulation status detection module 30, and display module 40. When the user releases the power button, the power-on / off control module 60 can activate the power module 50 to enter a sleep state based on the button's activation state. This disconnects the power module 50 from the microprocessor module 10, wiring status detection module 20, insulation status detection module 30, and display module 40, preventing the power module 50 from supplying power to these components.

[0025] Furthermore, the power on / off control module 60 is connected to the microprocessor module 10. The microprocessor module 10 is also used to send power on / off control signals to the power on / off control module 60, and the power on / off control module 60 is also used to control the operating state of the power supply module 50 according to the power on / off control signals.

[0026] It should be noted that the microprocessor module 10 can also indirectly control the power supply module 50 by controlling the power on / off control module 60, causing the power supply module 50 to enter either a working state or a sleep state. Indirect control of the power supply module 50 by the microprocessor module 10 can protect the working circuit of the socket tester. For example, when the microprocessor module 10 detects an abnormality in the output voltage and / or output current of the power supply module 50, it causes the power supply module 50 to enter a sleep state to prevent malfunctions in the socket tester's working circuit; when the microprocessor module 10 detects that the output voltage and / or output current of the power supply module 50 has returned to normal, it causes the power supply module 50 to enter a working state.

[0027] Furthermore, the microprocessor module 10 is connected to the first insulation condition detection submodule 31. The microprocessor module 10 is used to acquire the sampled voltage signal from the first insulation condition detection submodule 31 and generate a power-on / off control signal based on the sampled voltage signal. Since the first insulation condition 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 through 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 sleep state through the power-on / off control module 60; if the output voltage of the power supply module 50 is detected to return to normal, a power-on / off control signal is generated, and the power supply module 50 is controlled to enter the working state through the power-on / off control module 60.

[0028] like Figure 3As shown, the socket tester's working circuit also includes a detection switching module 70, which is 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, or to connect the insulation status detection module 30 to the live wire L, neutral wire E, and ground wire N of the socket under test, according to the detection switching signal.

[0029] In practical work, through the control of the detection switching module 70 by the microprocessor module 10, the wiring status detection module 20 can be connected to the live wire L, neutral wire E and ground wire N of the socket under test first, 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. 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 to measure the insulation status between the live wire L and neutral wire E, the insulation status between the live wire L and ground wire N, and the insulation status between the neutral wire E and ground wire N of the socket under test.

[0030] 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 state 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.

[0031] 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 submodule 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 submodule 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 submodule 33.

[0032] When the microprocessor module 10 controls the common terminal COM1 of the first single-pole double-throw relay 71 to connect to the normally closed terminal NC1, controls the common terminal COM2 of the second single-pole double-throw relay 72 to connect to the normally closed terminal NC2, and controls the common terminal COM3 of the third single-pole double-throw relay 73 to connect to the normally closed terminal NC3, the wiring status of the live wire L, neutral wire E, and ground wire N of the socket under test can be measured. When the microprocessor module 10 controls the common terminal COM1 of the first single-pole double-throw relay 71 to connect to the normally open terminal NO1, controls the common terminal COM2 of the second single-pole double-throw relay 72 to connect to the normally open terminal NO2, and controls the common terminal COM3 of the third single-pole double-throw relay 73 to connect to the normally open terminal NO3, the insulation status between the live wire L and neutral wire E, the insulation status between the live wire L and ground wire N, and the insulation status between the neutral wire E and ground wire N of the socket under test can be measured respectively.

[0033] Furthermore, the second insulation condition detection submodule 32 and the third insulation condition detection submodule 33 can adopt a common insulation condition detection circuit. The detection switching module 70 also includes a fourth single-pole double-throw relay 74, which is connected to the microprocessor module 10. The microprocessor module 10 is used 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 condition detection circuit, the normally closed terminal NC4 is used to connect to the normally open terminal NO2 of the second single-pole double-throw relay 72, and the normally open terminal NO4 is used to connect to the normally open terminal NO3 of the third single-pole double-throw relay 73.

[0034] 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. It can measure the insulation state between the live wire L and the ground wire N of the socket under test and the insulation state between the neutral wire E and the ground wire N of the socket under test through the common insulation state detection circuit.

[0035] The first insulation condition detection submodule 31 includes a step-up transformer connected to the power supply module 50. The step-up transformer is used to obtain a low-voltage reference signal from the power supply module 50 and convert the low-voltage reference signal into a high-voltage test signal. Furthermore, the first insulation condition detection submodule 31 can apply the high-voltage test signal between the live wire L and the neutral wire E of the socket under test to measure the insulation condition between the live wire L and the neutral wire E of the socket under test.

[0036] The microprocessor module 10 includes a microcontroller, which performs signal acquisition, signal processing and signal control. Preferably, the microcontroller is a HY17P60B.

[0037] The socket tester disclosed in this invention includes the aforementioned socket tester working circuit. Because the socket tester includes this working circuit, it can not only determine the wiring status of the live wire L, neutral wire E, and ground wire N of the socket under test, but also determine the insulation status between the live wire L and neutral wire E, the insulation status between the live wire L and ground wire N, and the insulation status between the neutral wire E and ground wire N, thus meeting diverse user testing needs and improving user testing efficiency.

[0038] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0039] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A working circuit for a socket tester, 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 socket under test, and to feed back a first detection signal to the microprocessor module. The microprocessor module is used to determine the wiring status of the live wire, neutral wire and ground wire of the socket under test based on the first detection signal. The insulation condition detection module includes a first insulation condition detection submodule, a second insulation condition detection submodule, and a third insulation condition detection submodule. The first insulation condition detection submodule is used to connect the live wire and the neutral wire of the socket under test, and to feed back a second detection signal to the microprocessor module. The microprocessor module is used to determine the insulation condition between the live wire and the neutral wire of the socket under test based on the second detection signal. The second insulation condition detection submodule is used to connect the live wire and the ground wire of the socket under test, and to feed back a third detection signal to the microprocessor module. The microprocessor module is used to determine the insulation condition between the live wire and the ground wire of the socket under test based on the third detection signal. The third insulation condition detection submodule is used to connect the neutral wire and the ground wire of the socket under test, and to feed back a fourth detection signal to the microprocessor module. The microprocessor module is used to determine the insulation condition between the neutral wire and the ground wire of the socket under test based on the fourth detection signal. The microprocessor module is also used to send the detection results to the display module for display.

2. The working circuit of the socket tester according to claim 1, characterized in that, The socket tester's working circuit also includes a power supply module and a power on / off control module. The power supply module is 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, respectively. The power module is used to provide operating 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, used to control the operating state of the power module according to the state of the power on / off button.

3. The working circuit of the socket tester according to claim 2, characterized in that, The power on / off control module is connected to the microprocessor module; The microprocessor module is also used to send a power-on / off control signal to the power-on / off control module, and the power-on / off control module is also used to control the operating state of the power module according to the power-on / off control signal.

4. The working circuit of the socket tester 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 acquire a sampled voltage signal from the first insulation state detection submodule and generate the power-on / off control signal based on the sampled voltage signal.

5. The working circuit of the socket tester according to any one of claims 1 to 4, characterized in that, The socket tester's working circuit also includes a detection switching module, which is 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 socket under test according to the detection switching signal, or... Connect the insulation condition detection module to the live wire, neutral wire, and ground wire of the socket under test.

6. The working circuit of the socket tester 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 terminal of the first single-pole double-throw relay is connected to the live wire 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 first insulation status detection submodule. The common terminal of the second single-pole double-throw relay is connected to the neutral wire 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 terminal of the third single-pole double-throw relay is connected to the ground wire 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 third insulation status detection submodule.

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

8. The working circuit of the socket tester according to claim 1, characterized in that, The first insulation condition detection submodule includes a step-up transformer; The step-up transformer is connected to the power supply module and is used to obtain a low-voltage reference signal from the power supply module and convert the low-voltage reference signal into a high-voltage test signal.

9. The working circuit of the socket tester according to claim 1, characterized in that, The microprocessor module includes a microcontroller, the model of which is HY17P60B.

10. A socket tester, characterized in that, The socket tester includes the socket tester operating circuit as described in any one of claims 1 to 9.

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