A harmonic detection device

Abstract

The utility model provides a kind of harmonic detection device, belong to harmonic detection technical field, for the factory detection of harmonic protector, including detection main part, detection main part top is connected with detection frame, detection frame is provided with the detection wheel of array arrangement, detection wheel is arranged in arc shape;Detection main part is provided with multiple buttons, and power supply component is arranged on the side surface of detection main part;Detection wheel is contacted by surface to lead, so that connection is stable, not only avoid the abrasion of lead but also can improve the stability of contact point, guarantee the effective connection main body inside detection port during detection process, utilize detection wheel to be close to the circuit of harmonic protector and carry out detection, avoid the problem that interface type is easy to wear and contact problem, can effectively improve detection efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of harmonic detection technology, and specifically relates to a harmonic detection device. Background Technology

[0002] Currently, with the development of science and technology, high-tech low-voltage electrical equipment is connected to the power grid through power electronic interfaces, such as frequency converters, energy-saving lamps, variable frequency air conditioners, computers, and televisions in industrial, agricultural, military, and civilian electrical equipment. These devices constitute an increasingly large proportion of the power grid, not only injecting a large amount of harmonics into the grid but also being affected by them. Since there are standard limits for low-frequency harmonics (below the 29th harmonic), most electrical equipment can basically meet the requirements. However, the testing devices for harmonic protection devices are often simple in design, and poor contact at the interface can lead to inconvenient testing. Furthermore, improper user operation using the interface-based testing method can cause wire wear during the inspection process and may result in errors due to unstable contact points, leading to inaccurate test results and reducing the factory-installed testing accuracy of the harmonic protection devices. Utility Model Content

[0003] This invention addresses the problems of existing technologies by providing a harmonic detection device.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows: A harmonic detection device for factory testing of harmonic protectors includes a detection body, a detection frame connected to the top of the detection body, and detection wheels arranged in an array on the detection frame in an arc shape; multiple buttons are provided on the detection body, and a power supply component is provided on the side of the detection body.

[0005] The testing frame includes an arc-shaped frame and a connecting plate. The connecting plate connects the arc-shaped frame to the testing body. The connecting plate can rotate at a certain angle relative to the testing body, allowing the arc-shaped frame to rotate at a certain angle. During testing, the angle of the arc-shaped frame can be adjusted according to the testing angle to facilitate testing.

[0006] The detection wheel is installed on the inner side of the arc frame and can rotate relative to the arc frame. The detection wheel is connected to the detection port inside the detection body through a wire. The detection wheel can be used to closely contact the circuit of the harmonic protector and perform detection, which can effectively improve the detection efficiency and deal with abnormalities in a timely manner.

[0007] The buttons connect to the internal circuitry of the detection unit and are used for manual control of the detection process, allowing for corresponding tests on different circuits.

[0008] The power supply unit includes a battery mounting bracket that can hold multiple batteries. The power supply unit can be detached from the testing body for easy transportation and storage.

[0009] Compared with the prior art, the advantages and positive effects of this utility model are as follows: This utility model employs a testing frame and testing wheels mounted on a testing body. The testing frame includes an arc-shaped frame and a connecting plate, which connects the arc-shaped frame to the testing body. The connecting plate can rotate at a certain angle relative to the testing body, allowing the arc-shaped frame to rotate as well. During testing, the angle of the arc-shaped frame can be adjusted according to the testing angle for convenient testing. The testing wheels are installed on the inner side of the arc-shaped frame and can rotate relative to it. The testing wheels make surface contact with the wires, ensuring a stable connection. This not only avoids wear on the wires but also improves the stability of the contact point, ensuring effective connection to the internal testing port of the testing body. The testing wheels can be used to closely contact the circuit of the harmonic protector for testing, avoiding the problems of easy wear and poor contact of the interface type. This effectively improves testing efficiency and allows for timely handling of any abnormalities. It also prevents inconvenience caused by poor contact during use, solving the problem of inaccurate test results due to improper operation by users, and improving the factory testing accuracy of the harmonic protector device. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the first angle structure of a harmonic detection device according to the present invention; Figure 2 This is a schematic diagram of the second angle structure of a harmonic detection device according to the present invention; In the above figures, 1. Detection wheel; 2. Detection frame; 3. Detection body; 4. Power supply assembly; 5. Button. Detailed Implementation

[0012] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0013] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0014] Example 1, such as Figures 1-2As shown, this application provides a harmonic detection device for factory testing of harmonic protectors, including a detection body 3, a detection frame 2 connected to the top of the detection body 3, and multiple detection wheels 1 arranged in an array on the detection frame 2, the detection wheels 1 being arranged in an arc shape; multiple buttons 5 are provided on the detection body 3, and a power supply component 4 is provided on the side of the detection body 3; The testing frame 2 includes an arc-shaped frame and a connecting plate. The connecting plate connects the arc-shaped frame to the testing body 3. The connecting plate and the testing body 3 are connected by a rotating shaft. A toothed structure is installed at the rotating shaft, which can be rotated by a screw. A knob is installed at one end of the screw, so that the rotation can adjust the angle of the arc-shaped frame. The connecting plate can rotate at a certain angle relative to the testing body 3, so that the arc-shaped frame can rotate at a certain angle. During testing, the angle of the arc-shaped frame can be adjusted according to the testing angle to facilitate testing. The testing wheel 1 is installed on the inner side of the arc-shaped frame and can rotate relative to the arc-shaped frame. The testing wheel 1 is connected to the internal testing port of the testing body 3 through a wire. The testing wheel 1 can be used to closely contact the circuit of the harmonic protector for testing, which can effectively improve the testing efficiency and deal with abnormalities in a timely manner.

[0015] Button 5 connects to the internal circuit of the detection body 3. Button 5 is used for manual control of the detection method to perform corresponding tests for different circuits. The power supply component 4 includes a battery mounting bracket, which can install multiple batteries. The power supply component 4 can be removed from the detection body 3 for convenient transportation and storage.

[0016] The detection unit 3 can be a Linax PQ3000 / 5000 series online power quality analyzer, including first inductors L1 to third inductors L3, first rectifier DR1, second rectifier DR2, capacitor C, Zener diode DW, SCR, first push-button switch AN1, second push-button switch AN2, and contactors. First inductors L1, second inductors L2, and third inductors L3 are inductively connected to the three cables of the three-phase power supply, respectively. First inductors L1 to third inductors are connected in series. The two ends of the series-connected first inductors L1 to third inductors L3 are connected to the two input terminals of the first rectifier DR1. The two input terminals of the second rectifier DR2 are connected via the second push-button switch AN2. Switch AN2 and contactor KM are connected to any two phases of the three-phase power supply. The normally open switch KM1 of the contactor is connected to the three-phase power supply. The positive output terminal of the first rectifier DR1 is simultaneously connected to the first terminal of capacitor C, the negative terminal of Zener diode DW, and the control terminal of silicon controlled rectifier SCR. The negative output terminal of the first rectifier DR1 is simultaneously connected to the second terminal of capacitor C, the positive terminal of Zener diode DW, the negative terminal of silicon controlled rectifier SCR, the first terminal of the first push-button switch AN1, and the negative terminal of the second rectifier DR2. The positive terminal of the second rectifier DR2 is simultaneously connected to the positive terminal of silicon controlled rectifier SCR and the second terminal of the first push-button switch AN1.

[0017] The coils of the first inductor L1 to the third inductor L3 are mounted on the power cable. When current flows through the power cable, the inductors generate current. The current is distilled by the first rectifier DR1 and output to the control terminal of the SCR (Silicon Controlled Rectifier). When the power harmonics are too large, the current reaches the conduction point of the SCR, and the SCR conducts, causing the second rectifier DR2 to output current, which causes the contactor KM to disconnect the contactor's control switch KM1. Pressing the push button switch AN1 manually disconnects the power supply to the power cable, and pressing the second push button switch AN2 resets it.

[0018] The capacitor C is 300uf, the Zener diode DW is 2CW1, the first rectifier DR1 and the second rectifier DR2 are both IN4001, the SCR is KP1A / 800V, and the first inductor L1 to the third inductor L3 are all 2mm wound with 5 turns.

[0019] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A harmonic detection device for factory testing of harmonic protectors, characterized in that, It includes a detection body, a detection frame connected to the top of the detection body, and detection wheels arranged in an array on the detection frame in an arc shape; multiple buttons are provided on the detection body, and a power supply component is provided on the side of the detection body; The testing frame includes an arc-shaped frame and a connecting plate. The connecting plate connects the arc-shaped frame to the testing body. The connecting plate and the testing body are connected by a rotating shaft. A toothed structure is installed at the rotating shaft. The toothed structure can be rotated using a screw. A knob is installed at one end of the screw, so that the rotation can adjust the angle of the arc-shaped frame. The connecting plate can rotate at a certain angle with the testing body, so that the arc-shaped frame can rotate at a certain angle. During testing, the angle of the arc-shaped frame can be adjusted according to the testing angle.

2. The harmonic detection device as described in claim 1, characterized in that, The detection wheel is installed on the inner side of the arc-shaped frame and can rotate relative to the arc-shaped frame. The detection wheel is connected to the detection port inside the detection body through a wire. The detection wheel is used to press against the circuit of the harmonic protector and perform detection.

3. The harmonic detection device as described in claim 1, characterized in that, The button connects to the internal circuitry of the detection unit.

4. The harmonic detection device as described in claim 1, characterized in that, The power assembly includes a battery mounting bracket, within which multiple batteries are installed.

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