Accurate level compensation wiring device and capacitive voltage transformer

Abstract

The utility model relates to a kind of accurate level compensation wiring device and capacitive voltage transformer, accurate level compensation wiring device includes at least one first compensation unit, at least one second compensation unit, phoenix joint unit, at least one first cable unit and at least one second cable unit.Its advantage lies in, the device provided by the utility model is designed using special wiring terminal, assembled on the secondary terminal guide rail of mutual inductor, the device can concentrate the outgoing terminal of all mutual inductor compensation coil together, after finished product test, different compensation values can be freely combined by compensation joint device, and all unnecessary compensation coil can be connected with mutual inductor primary winding equipotential by phoenix bridging piece and cable.The device accessory performance is reliable, easy to operate, improves operation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of mechanical engineering technology, and in particular to an accuracy-level compensation wiring device and a capacitive voltage transformer. Background Technology

[0002] Compared to traditional electromagnetic current transformers, capacitive voltage transformers utilize the principle of capacitive voltage division, eliminating the need for a large amount of expensive high-voltage insulation materials and core structures, resulting in a significant cost advantage. They also more efficiently avoid output distortion caused by potential core saturation due to overvoltage. A capacitive voltage divider consists of a high-voltage capacitor C1 and a low-voltage capacitor C2. The capacitors are designed with an allowable error of +10% to -5%. Errors in the capacitor value will lead to errors in the voltage division ratio, and consequently, errors in the divided voltage. Furthermore, the voltage division ratio of a capacitive voltage divider is also related to frequency and temperature; changes in frequency and temperature will result in certain errors in the voltage division ratio.

[0003] These errors are typically ratio errors, which need to be reduced using a resonant reactor. Pure capacitive voltage division can cause a phase difference between the output and input voltages. Connecting measuring instruments or protection devices to the low-voltage side of the transformer, along with the load current, can also cause a drop in the output voltage; thus, both ratio and phase differences will introduce errors.

[0004] The ratio difference and phase difference of a product can affect the application of relatively sensitive devices such as power metering and relay protection. Therefore, it is necessary to adjust the error by using a compensation coil. However, the actual error of a capacitive voltage transformer can often only be tested during the finished product test. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing an accuracy-level compensation wiring device for capacitive voltage transformers, thereby solving problems such as voltage divider ratio error and phase difference in related technologies.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: In a first aspect, this application provides an accuracy-grade compensation wiring device for a capacitive voltage transformer. The capacitive voltage transformer includes a reactance structure, a core structure, and a secondary terminal wiring structure, comprising: At least one first compensation unit is disposed in the reactance structure of the capacitive voltage transformer; At least one second compensation unit is disposed on the core structure of the capacitive voltage transformer; Phoenix Contact Unit, wherein the Phoenix Contact Unit is disposed in the secondary terminal wiring structure of the capacitive voltage transformer; At least one first cable unit, wherein the first cable unit is connected to the corresponding first compensation unit and the Phoenix connector unit respectively; At least one second cable unit, the second cable unit being connected to the corresponding second compensation unit and the Phoenix connector unit respectively; At least one third cable unit, which is connected to the primary winding of the capacitive voltage transformer and the Phoenix Contact unit respectively.

[0007] In some embodiments, the first compensation unit includes: The first compensation element is disposed in the reactance structure of the capacitive voltage transformer; The first lead terminal element is connected to the first compensation element and the corresponding first cable unit.

[0008] In some embodiments, the second compensation unit includes: The second compensation coil element is disposed in the core structure of the capacitive voltage transformer; The second lead terminal element is connected to the second compensation coil element and the corresponding second cable unit, respectively.

[0009] In some embodiments, the Phoenix Contact unit includes: Phoenix Contact terminal element, wherein the Phoenix Contact terminal element is disposed in the secondary terminal wiring structure of the capacitive voltage transformer.

[0010] In some embodiments, the Phoenix Contact unit further includes: A plurality of first interface elements are distributed on the Phoenix terminal elements and are respectively connected to the first cable unit; A plurality of second interface elements are distributed on the Phoenix terminal elements and are respectively connected to the second cable unit; A plurality of third interface elements are distributed in the Phoenix connector unit and are respectively connected to the third cable unit.

[0011] In some embodiments, the Phoenix Contact unit further includes: At least one first bridging element is provided, which is connected to a first interface element and a second interface element respectively, for compensating for the ratio difference of the accuracy level error of the current transformer.

[0012] In some embodiments, the Phoenix Contact unit further includes: At least one second bridging element is provided, which is connected to a first interface element and a third interface element of the Phoenix Contact unit, respectively, to prevent the non-working compensation coil from being left floating. At least one third bridging element is provided, which is connected to a second interface element and a third interface element of the Phoenix Contact unit respectively, to prevent the non-working compensation coil from being left floating.

[0013] Secondly, this application provides a capacitive voltage transformer, including the accuracy-level compensation wiring device described in any of the first aspects.

[0014] In some embodiments, the capacitive voltage transformer further includes: The reactor device is equipped with the first compensation unit of the accuracy-level compensation wiring device; Iron core device, wherein the iron core device is provided with the second compensation unit of the accuracy level compensation wiring device; A secondary terminal wiring device, wherein the secondary terminal wiring device is provided with the Phoenix connector unit of the accuracy-level compensation wiring device.

[0015] In some embodiments, the secondary terminal wiring device includes: A guide rail element, which is slidably connected to the Phoenix Contact unit.

[0016] The present invention adopts the above technical solution and has the following technical effects compared with the prior art: The device provided by this utility model utilizes special wiring terminals, assembled on the secondary terminal rail of the current transformer. This device can centralize the output terminals of all the current transformer compensation coils. After the finished product test, different compensation values ​​can be freely combined through the compensation connector device. Furthermore, all unused compensation coils can be equipotentially connected to the primary winding of the current transformer through Phoenix Contact bridges and cables. The device is reliable, easy to operate, and improves work efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a capacitive voltage transformer according to Embodiment 1 of this utility model; Figure 2 This is a schematic diagram of the first compensation unit according to Embodiment 1 of the present utility model; Figure 3 This is a schematic diagram of the second compensation unit according to Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the Phoenix connector unit according to Embodiment 1 of the present invention; The reference numerals in the attached figures are: 10. Reactor device; 20. Iron core device; 30. Secondary terminal wiring device; 100. First compensation unit; 110. First compensation element; 120. First lead terminal element; 200, Second compensation unit; 210, Second compensation element; 220, Second lead terminal element; 300, Phoenix Contact Unit; 310, Phoenix Terminal Element; 320, First Interface Element; 330, Second Interface Element; 340, Third Interface Element; 350, First Bridging Element; 360, Second Bridging Element; 370, Third Bridging Element; 400. First cable unit; 500, Second Cable Unit; 600, Third Cable Unit. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0019] Obviously, the accompanying drawings described below are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios based on these drawings without any creative effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, any changes to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0020] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0021] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms “a,” “an,” “an,” “the,” and similar words used in this application do not indicate quantity limitation and may indicate singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that includes a series of steps or units (elements) is not limited to the listed steps or units, but may also include steps or units not listed, or may include other steps or units inherent to these processes, methods, products, or apparatus. The terms “connected,” “linked,” “coupled,” and similar words used in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms “multiple” / “several” used in this application refer to two or more. “And / or” describes the relationship between related objects, indicating that three relationships may exist; for example, “A and / or B” can indicate: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following objects are in an "or" relationship. The terms "first," "second," and "third" used in this application are merely to distinguish similar objects and do not represent a specific ordering of the objects.

[0022] Example 1 This embodiment relates to the accuracy-level compensation wiring device of this utility model.

[0023] An illustrative embodiment of this utility model, such as Figure 1 As shown, an accuracy-level compensation wiring device is used for a capacitive voltage transformer. The capacitive voltage transformer includes a reactance structure, a core structure, and a secondary terminal wiring structure. The accuracy-level compensation wiring device includes at least one first compensation unit 100, at least one second compensation unit 200, a Phoenix Contact unit 300, at least one first cable unit 400, at least one second cable unit 500, and at least one third cable unit 600. The first compensation unit 100 is disposed on the reactance structure of the capacitive voltage transformer; the second compensation unit 200 is disposed on the core structure of the capacitive voltage transformer; the Phoenix Contact unit 300 is disposed on the secondary terminal wiring structure of the capacitive voltage transformer; the first cable unit 400 is connected to the corresponding first compensation unit 100 and Phoenix Contact unit 300 respectively; the second cable unit 500 is connected to the corresponding second compensation unit 200 and Phoenix Contact unit 300 respectively; and the third cable unit 600 is connected to the primary winding of the capacitive voltage transformer and the Phoenix Contact unit 300 respectively.

[0024] Optionally, each reactance structure has at least one first compensation unit 100.

[0025] Optionally, each core structure has at least one second compensation unit 200.

[0026] The number of first cable units 400 and first compensation units 100 are matched. Generally, the number of first cable units 400 is twice the number of first compensation units 100.

[0027] The number of the second cable unit 500 and the second compensation unit 200 are matched. Generally, the number of the second cable unit 500 is twice the number of the second compensation unit 200.

[0028] like Figure 2 As shown, the first compensation unit 100 includes a first compensation element 110 and a first lead terminal element 120. The first compensation element 110 is disposed in the reactance structure of the capacitive voltage transformer; the first lead terminal element 120 is connected to the first compensation element 110 and the corresponding first cable unit 400.

[0029] Generally, the first compensation element 110 is disposed on the surface of the reactance structure of the capacitive voltage transformer and is detachably connected to the reactance structure.

[0030] In some of these embodiments, the first compensation element 110 is a compensation coil.

[0031] In some of these embodiments, the wire of the first compensation element 110 is copper wire.

[0032] Generally, the first lead terminal element 120 protrudes from the lower part of the surface of the reactance structure of the capacitive voltage transformer and is detachably connected to the first compensation element 110.

[0033] In some of these embodiments, the first lead terminal element 120 is a wiring terminal.

[0034] The number of first lead terminal elements 120 matches the number of first cable units 400. Generally, the number of first lead terminal elements 120 is equal to the number of first cable units 400.

[0035] like Figure 3 As shown, the second compensation unit 200 includes a second compensation coil element and a second lead terminal element 220. The second compensation element 210 is disposed on the core structure of the capacitive voltage transformer; the second lead terminal element 220 is connected to the second compensation element 210 and the corresponding second cable unit 500, respectively.

[0036] Specifically, the second compensation element 210 is disposed on the surface of the core structure of the capacitive voltage transformer and is detachably connected to the core structure.

[0037] In some of these embodiments, the second compensation element 210 is a compensation coil.

[0038] Specifically, the wire of the second compensation element 210 is the same as the primary coil on the core of the capacitive voltage transformer.

[0039] Specifically, the second lead terminal element 220 protrudes from the lower part of the surface of the core structure of the capacitive voltage transformer and is detachably connected to the second compensation element 210.

[0040] In some of these embodiments, the second lead terminal element 220 is a wiring terminal.

[0041] The number of second lead terminal elements 220 matches the number of second cable units 500. Generally, the number of second lead terminal elements 220 is equal to the number of second cable units 500.

[0042] like Figure 4 As shown, the Phoenix Contact Unit 300 includes a Phoenix Contact terminal element 310, a plurality of first interface elements 320, a plurality of second interface elements 330, a plurality of third interface elements 340, at least one first bridging element 350, at least one second bridging element 360, and at least one third bridging element 370. The Phoenix Contact terminal element 310 is disposed on the secondary terminal wiring structure of the capacitive voltage transformer; the plurality of first interface elements 320 are distributed on the Phoenix Contact terminal element 310 and connected to the first cable unit 400 and the first bridging element 350 respectively; the plurality of second interface elements 330 are distributed on the Phoenix Contact terminal element 310 and connected to the second cable unit 500 and the first bridging element 350 respectively; the plurality of third interface elements 340 are distributed on the Phoenix Contact terminal element 310 and connected to the third cable unit 600, the second bridging element 360, or the third bridging element 370 respectively. 370 connection; the first bridging element 350 is connected to a first interface element 320 and a second interface element 330 located on the same side of the Phoenix Contact element, respectively, to realize ratio difference compensation for the accuracy level error of the current transformer; the second bridging element is connected to a first interface element 320 and a third interface element 340 located on the same side of the Phoenix Contact element, respectively, to prevent the non-working compensation coil from being suspended; the third bridging element is connected to a second interface element 330 and a third interface element 340 located on the same side of the Phoenix Contact element, respectively, to prevent the non-working compensation coil from being suspended; In some of these embodiments, the Phoenix Contact element 310 is a Phoenix Contact terminal.

[0043] Specifically, the Phoenix terminal element 310 consists of two symmetrical upper and lower parts. Both upper and lower parts have a first interface element 320, a second interface element 330, and a third interface element 330 with the same number. By connecting two different cables to the interfaces with the same number in the upper and lower parts respectively, the two different cables can be connected in series.

[0044] The number of first interface elements 320 matches the number of first cable units 400. Generally, the number of first interface elements 320 is not less than twice the number of first cable units 400.

[0045] In some of these embodiments, the first interface element 320 is a first interface, including but not limited to a cable interface.

[0046] The number of second interface elements 330 matches the number of second cable units 500. Generally, the number of second interface elements 330 is not less than twice the number of second cable units 500.

[0047] In some of these embodiments, the second interface element 330 is a second interface, including but not limited to a cable interface.

[0048] The number of third interface elements 340 matches the number of third cable units 600.

[0049] In some of these embodiments, the third interface element 340 is a second interface, including but not limited to a cable interface.

[0050] In some of these embodiments, the first bridging element 350 is a wire or a Phoenix Contact bridge.

[0051] In some of these embodiments, the second bridging element 360 is a wire or a Phoenix Contact connector.

[0052] In some of these embodiments, the third bridging element 370 is a wire or a Phoenix Contact bridge.

[0053] The method of using this utility model is as follows: The first compensation unit 100 and the second compensation unit 200 are connected in series by the first bridging element 350, the first compensation unit and the primary winding of the transformer are connected in series by the second bridging element, and the second compensation unit and the primary winding of the transformer are connected in series by the third bridging element, thereby compensating for the phase difference and ratio difference of the accuracy level error of the transformer. Then, by adjusting the number of the first bridging element 350, the second bridging element 360, and the third bridging element 370, different compensation requirements can be met, thus avoiding the floating of non-working compensation coils.

[0054] The technical effects of this utility model are as follows: This invention is simple to operate, improves work efficiency, is reliable in performance, standardizes assembly operations, and effectively solves potential safety hazards during compensation processes. Example 2 This embodiment relates to the current transformer of this utility model.

[0055] One illustrative embodiment of this utility model is a current transformer, which includes a current transformer body and an accuracy-level compensation wiring device as described in any of Embodiments 1 to 2.

[0056] In this invention, the transformer body includes, but is not limited to, a capacitive transformer. This is prior art in the field and will not be described further here.

[0057] Furthermore, the current transformer also includes a reactor device 10, a core device 20, and a secondary terminal wiring device 30. The reactor device 10 is equipped with a first compensation unit 100 of the accuracy-level compensation wiring device; the core device 20 is equipped with a second compensation unit 200 of the accuracy-level compensation wiring device; and the secondary terminal wiring device 30 is equipped with a Phoenix Contact unit 300 of the accuracy-level compensation wiring device.

[0058] Furthermore, the secondary terminal wiring device 30 includes a guide rail element. The guide rail element is slidably connected to the Phoenix Contact unit 300.

[0059] Specifically, the guide rail element is slidably connected to the Phoenix Contact terminal element 310.

[0060] In some of these embodiments, the Phoenix Contact terminal element 310 is snap-fitted and slidably disposed on the guide rail element.

[0061] In some of these embodiments, the guide rail element is a DIN rail.

[0062] The usage method of this embodiment is basically the same as that of Embodiment 1, and will not be repeated here.

[0063] The technical effects of this embodiment are basically the same as those of Embodiment 1, and will not be repeated here.

[0064] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An accurate class compensation connection device for a capacitive voltage transformer comprising a reactance structure, a core structure and a secondary terminal connection structure, characterized in that, The application relates to an accurate-grade compensation wiring device for a capacitor voltage transformer. The accurate-grade compensation wiring device comprises: at least one first compensation unit arranged in a reactance structure of the capacitor voltage transformer; at least one second compensation unit arranged in a core structure of the capacitor voltage transformer; a Phoenix joint unit arranged in a secondary terminal wiring structure of the capacitor voltage transformer; at least one first cable unit connected with the corresponding first compensation unit and the Phoenix joint unit respectively; at least one second cable unit connected with the corresponding second compensation unit and the Phoenix joint unit respectively; 2. The accuracy grade compensation wiring device of claim 1, wherein, at least one third cable unit connected with a primary winding of the capacitor voltage transformer and the Phoenix joint unit respectively. The first compensation unit comprises: a first compensation element arranged in the reactance structure of the capacitor voltage transformer; 3. The accuracy grade compensation wiring device of claim 1, wherein, a first lead terminal element connected with the first compensation element and the corresponding first cable unit respectively. The second compensation unit comprises: a second compensation coil element arranged in the core structure of the capacitor voltage transformer; 4. The accuracy grade compensation wiring device of claim 1, wherein, a second lead terminal element connected with the second compensation coil element and the corresponding second cable unit respectively. The Phoenix joint unit comprises:

5. An accuracy grade compensation wiring device according to claim 4, wherein, a Phoenix terminal element arranged in the secondary terminal wiring structure of the capacitor voltage transformer. The Phoenix joint unit further comprises: a plurality of first interface elements arranged in the Phoenix terminal element and connected with the first cable unit respectively; a plurality of second interface elements arranged in the Phoenix terminal element and connected with the second cable unit respectively; 6. An accuracy grade compensation wiring device according to claim 5, wherein, a plurality of third interface elements arranged in the Phoenix joint unit and connected with the third cable unit respectively. The Phoenix joint unit further comprises:

7. The accuracy grade compensation wiring device of claim 5, wherein, at least one first bridge element connected with the first interface element and the second interface element respectively, and used for realizing ratio difference compensation of the accurate-grade error of the transformer. The Phoenix joint unit further comprises: at least one second bridge element connected with the first interface element and the third interface element of the Phoenix joint unit respectively, and used for avoiding the non-working compensation coil being suspended; 8. A capacitor voltage transformer, characterized by at least one third bridge element connected with the second interface element and the third interface element of the Phoenix joint unit respectively, and used for avoiding the non-working compensation coil being suspended. The application further relates to an accurate-grade compensation wiring device.

9. The capacitance voltage transformer according to claim 8, characterized in that, The accurate-grade compensation wiring device comprises: a reactance device provided with the first compensation unit of the accurate-grade compensation wiring device; a core device provided with the second compensation unit of the accurate-grade compensation wiring device. A secondary terminal wiring device is provided with the Phoenix terminal unit of the accuracy level compensation wiring device.

10. The capacitance voltage transformer according to claim 9, characterized in that, The secondary terminal wiring device comprises: A guide rail element is in sliding connection with the Phoenix terminal unit.

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