Zinc oxide arrester on-line monitor with live display function

Abstract

The utility model provides a zinc oxide arrester on-line monitor with a live-line display function. The zinc oxide arrester on-line monitor comprises a live-line display module, a measurement host and a high-precision open-close type current transformer. The live display module comprises a control relay, a high-brightness and wide-temperature industrial-grade liquid crystal screen, a current amplification module and an interface module; the measurement host comprises a weak current signal acquisition module, an analog-to-digital conversion module, a data processing unit and a display control module; the high-precision open-close type current transformer collects signals; the data processing unit performs data interaction with the display control module through a communication line; a convenient plugging output terminal is connected with a signal line of the locking device, and an electrified display module end comprises two groups of double-contact relay outputs and has the functions of high-voltage electrified display and forced locking for controlling the locking device. The integrated design of a live display device and a zinc oxide arrester on-line monitoring device is realized, and the device has two functions at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical testing, in particular to an online monitoring instrument for zinc oxide lightning arresters with a charged display function. Background Art

[0002] The zinc oxide arrester online monitor with live display function is used to measure the zinc oxide leakage current, mainly to measure the zinc oxide arrester leakage current, so as to analyze the degree of aging and moisture of the internal valve plate of the zinc oxide arrester; at the same time, the equipment has the high-voltage live display locking function, the light display line live function and the function of preventing live earthing knife (hanging ground wire). The traditional zinc oxide arrester online monitor does not have the line live display and the function of preventing live earthing knife. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide an online monitor for zinc oxide lightning arresters with a live display function, so as to realize live replacement of the live display device without power outage.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an online monitor for zinc oxide lightning arresters with a live display function, comprising a live display module, a measuring host and a high-precision split current transformer; the live display module comprises a control relay, a high-brightness, wide-temperature industrial-grade LCD screen, a current amplification module and an interface module; the measuring host comprises a weak current signal acquisition module, an analog-to-digital conversion module, a data processing unit and a display control module; the high-precision split current transformer collects signals; the output port collected by the high-precision split current transformer is connected to the input port of the current signal acquisition module, the output port of the current signal acquisition module is connected to the input port of the analog-to-digital conversion module, and the analog-to-digital conversion module exchanges data with the data processing unit; the data processing unit interacts with the display control module through a communication line; a convenient plug-in output terminal is used to connect to the locking device signal line, and the live display module end includes two sets of double-contact relay outputs, which have the functions of high-voltage live display and forced locking of the control locking device.

[0005] In a preferred embodiment, the split-type current transformer is a high-precision split-type current transformer with a measuring range of 0.1A and a transformation ratio of 1000:1, and an iron core made of an iron-based nanocrystalline alloy material.

[0006] In a preferred embodiment, the data processing unit is an ARM chip with DSP operation and analysis functions.

[0007] In a preferred embodiment, the zinc oxide lightning arrester online monitor with a live display function integrates the live display and high-voltage live lockout on the zinc oxide lightning arrester online monitor. When the current transformer in the zinc oxide lightning arrester online detector collects leakage current, it indicates that the line is live, the live display light is on, and the control locking device is forced to lock; when the leakage current in the zinc oxide lightning arrester online monitor is less than 1μA, it indicates that the line is not live, the live display light is off, and the control locking device is unlocked.

[0008] Compared with the prior art, the utility model has the following beneficial effects:

[0009] 1. The device has both the line live display function and the zinc oxide arrester leakage current monitoring function, which can realize the replacement of the live display device without power outage.

[0010] 2. The device is equipped with forced locking of the control locking device when the high voltage is energized, and has an indicator light to show that the line is energized. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of an online monitoring instrument for zinc oxide lightning arresters with a charged display function according to an embodiment of the utility model;

[0012] Figure 2 This is a schematic diagram of the current sampling working mode of an online monitor for zinc oxide lightning arresters with a charged display function according to an embodiment of the utility model;

[0013] Figure 3 The utility model is a voltage sampling principle diagram of an online monitor for zinc oxide lightning arresters with a charged display function according to an embodiment of the utility model. DETAILED DESCRIPTION

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0015] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0016] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application; as used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations.

[0017] like Figure 1-3As shown in the figure, the zinc oxide arrester online monitor with power display function collects signals to the current signal acquisition module through a high-precision current transformer. Figure 1 The analog-to-digital conversion module converts analog measurements into digital quantities; the analog-to-digital conversion module exchanges the output digital quantities with the data processing unit, and uses Fourier transform processing to calculate the digital quantity of leakage current collected by the current transformer. According to the design logic, when the current transformer in the zinc oxide arrester online detector collects leakage current (>10μA), the data processing unit indicates that the line is energized, the energized display light is on, and the forced locking of the control locking device is controlled; when the leakage current in the arrester online monitor is less than 1μA, it indicates that the line is not energized, the energized display light is off, and the forced locking of the control locking device is released. Use the convenient plug-in output terminal to connect to the locking device signal line. The energized display module end contains two sets of double-contact relay outputs, which have the functions of high-voltage energized display and forced locking of the control locking device. The equipment has a reasonable structure layout and is characterized by small size, light weight, and easy installation.

[0018] Furthermore, the zinc oxide arrester online monitor with a charge display function integrates a charge display device with an online monitoring device of the zinc oxide arrester, and has both functions.

[0019] Furthermore, the split current transformer has a range of 0.1A, a ratio of 1000:1, and a high-precision split current transformer made of an iron-based nanocrystalline alloy material. The unique double-layer shielding technology has a strong anti-interference ability, high test stability and accuracy, and is not afraid of complex interference environments. It can accurately test weak currents, ensuring high precision, high stability, and high reliability of uninterrupted measurement throughout the year.

[0020] Furthermore, the data processing unit is an ARM chip with DSP operation and analysis functions, which can achieve real-time transmission with milliseconds as one operation cycle, and better realize device linkage.

[0021] Furthermore, the zinc oxide arrester online monitor with live display function integrates live display and high-voltage live lockout on the arrester online monitor. When the current transformer in the zinc oxide arrester online detector collects leakage current (>10μA), it indicates that the line is live, the live display light is on, and the control locking device is forced to lock; when the leakage current in the arrester online monitor is less than 1μA, it indicates that the line is not live, the live display light is off, and the control locking device releases the forced lockout.

Claims

1. An online monitor for zinc oxide lightning arresters with a charge display function, characterized in that: It includes a live display module, a measuring host and a high-precision split current transformer; the live display module includes a control relay, a high-brightness, wide-temperature industrial-grade LCD screen, a current amplification module and an interface module; the measuring host includes a weak current signal acquisition module, an analog-to-digital conversion module, a data processing unit and a display control module; the high-precision split current transformer collects signals; the output port collected by the high-precision split current transformer is connected to the input port of the current signal acquisition module, the output port of the current signal acquisition module is connected to the input port of the analog-to-digital conversion module, the analog-to-digital conversion module exchanges data with the data processing unit; the data processing unit interacts with the display control module through a communication line; the convenient plug-in output terminal is connected to the locking device signal line, the live display module end includes two sets of double-contact relay outputs, and has the function of high-voltage live display and forced locking of the control locking device.

2. The zinc oxide arrester online monitor with a charge display function according to claim 1 is characterized in that: The split-type current transformer has a range of 0.1A, a transformation ratio of 1000:1, and a high-precision split-type current transformer whose core is made of iron-based nanocrystalline alloy material.

3. The zinc oxide arrester online monitor with a charge display function according to claim 1 is characterized in that: The data processing unit is an ARM chip with DSP operation and analysis functions.

4. The zinc oxide arrester online monitor with a charge display function according to claim 1, characterized in that: The zinc oxide arrester online monitor with live display function integrates live display and high-voltage live interlock on the zinc oxide arrester online monitor. When the current transformer in the zinc oxide arrester online detector collects leakage current, it means that the line is live, the live display light is on, and the control interlock device is forced to lock; when the leakage current in the zinc oxide arrester online monitor is less than 1μA, it means that the line is not live, the live display light is off, and the control interlock device is unlocked.

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