CN216747949U - Intelligent light device for long cable high-voltage alternating-current voltage withstand test - Google Patents
Intelligent light device for long cable high-voltage alternating-current voltage withstand test Download PDFInfo
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- CN216747949U CN216747949U CN202122290530.2U CN202122290530U CN216747949U CN 216747949 U CN216747949 U CN 216747949U CN 202122290530 U CN202122290530 U CN 202122290530U CN 216747949 U CN216747949 U CN 216747949U
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Abstract
The utility model relates to an intelligent light device for a long cable high-voltage alternating-current withstand voltage test, which comprises a single chip microcomputer, a control switch, a generator, a voltage regulating handle, a first current transformer, a test transformer, a voltage transformer and a reactor, wherein the single chip microcomputer is connected with the control switch; the single chip microcomputer is respectively connected with the control switch, the generator, the test transformer, the first current transformer and the first end of the voltage transformer; the generator and the control switch are respectively connected with the pressure regulating handle; the contact of the voltage regulating handle is contacted with a tap on the test transformer; one end of the test transformer is respectively connected with the third end of the voltage transformer and one end of the reactor; one end of the reactor is also connected with the long cable; the other end of the test transformer is respectively connected with the fourth end of the voltage transformer, the second end of the voltage transformer, the other end of the reactor and one end of the first current transformer; the other end of the first current transformer is connected with the long cable. The device is novel in structure, can realize the withstand voltage test of a high-voltage cable for several kilometers, and is easy to popularize and apply.
Description
Technical Field
The utility model belongs to the technical field of long cable high-voltage alternating current voltage withstand test, and particularly relates to an intelligent light device for long cable high-voltage alternating current voltage withstand test.
Background
The cable is subjected to electrical safety performance parameter inspection and test in the whole life cycle of delivery, installation, use, operation and maintenance, the AC withstand voltage test is one of important indexes for inspecting the safety performance of the cable, and the AC withstand voltage test is to apply certain high voltage to the tested cable and keep the certain high voltage for a certain time so as to verify the capability of the tested cable to bear certain high voltage and ensure the use safety of the tested cable.
At present, a high-voltage cable, such as a 10KV high-voltage cable, is usually long, about several kilometers, and when performing an ac voltage withstand test, the test equipment cannot provide so much reactive power to perform the test. Therefore, how to overcome the defects of the prior art is a problem which needs to be solved urgently in the technical field of the high-voltage alternating-current withstand voltage test of the long cable at present.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the defects in the prior art and provides an intelligent light device for a long-cable high-voltage alternating-current withstand voltage test.
In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:
an intelligent light device for a long cable high-voltage alternating-current withstand voltage test comprises a single chip microcomputer, a control switch, a generator, a voltage regulating handle, a first current transformer, a test transformer, a voltage transformer and a reactor;
the single chip microcomputer is respectively connected with the control switch, the generator, the test transformer, the first current transformer and the first end of the voltage transformer;
the generator and the control switch are respectively connected with the pressure regulating handle;
the contact of the voltage regulating handle is contacted with a tap on the test transformer;
one end of the test transformer is respectively connected with the third end of the voltage transformer and one end of the reactor;
one end of the reactor is also connected with the long cable;
the other end of the test transformer is respectively connected with the fourth end of the voltage transformer, the second end of the voltage transformer, the other end of the reactor and one end of the first current transformer;
the other end of the first current transformer is connected with the long cable.
Further, it is preferable that the reactor further includes a second current transformer, and the second current transformer is provided in a circuit between the second end of the voltage transformer and the other end of the reactor.
Further, it is preferable that the other end of the test transformer is grounded.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model provides an intelligent light device for a long cable high-voltage alternating-current voltage withstand test, which is novel in structure, and can offset the current of a long cable through a shunt reactor L, so that a test transformer can realize the voltage withstand test of a high-voltage cable of several kilometers; the second current transformer is arranged for overcurrent protection, so that the device is protected from being damaged easily; the device is convenient to use and easy to popularize and apply.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a circuit diagram of the intelligent lightweight device for the long-cable high-voltage alternating-current withstand voltage test of the utility model.
Detailed Description
The present invention will be described in further detail with reference to examples.
It will be appreciated by those skilled in the art that the following examples are illustrative of the utility model only and should not be taken as limiting the scope of the utility model. The specific techniques, connections, conditions, or the like, which are not specified in the examples, are performed according to the techniques, connections, conditions, or the like described in the literature in the art or according to the product specification. The materials, instruments or equipment are not indicated by manufacturers, and all the materials, instruments or equipment are conventional products which can be obtained by purchasing.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the description of the present invention, "a plurality" means two or more unless otherwise specified. The terms "inner," "upper," "lower," and the like, refer to an orientation or a state relationship based on that shown in the drawings, which is for convenience in describing and simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "provided" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention are understood according to specific situations.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including 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 belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
As shown in fig. 1, the intelligent lightweight device for the long-cable high-voltage alternating-current voltage withstand test comprises a single chip microcomputer 1, a control switch QF, a generator M, a voltage regulating handle HG, a first current transformer TA0, a test transformer SB, a voltage transformer TV and a reactor L;
the single chip microcomputer 1 is respectively connected with a control switch QF, a generator M, a test transformer SB, a first current transformer TA0 and a first end of a voltage transformer TV;
the generator M and the control switch QF are respectively connected with a voltage regulating handle HG;
a contact P of the voltage regulating handle HG is contacted with a tap on the test transformer SB;
one end of the test transformer SB is respectively connected with the third end of the voltage transformer TV and one end of the reactor L;
one end of the reactor L is also connected with the long cable DL;
the other end of the test transformer SB is respectively connected with the fourth end of the voltage transformer TV, the second end of the voltage transformer TV, the other end of the reactor L and one end of the first current transformer TA 0;
the other end of the first current transformer TA0 is connected to the long cable DL.
Preferably, a second current transformer TA1 is further included, and the second current transformer TA1 is provided in the circuit between the second terminal of the voltage transformer TV and the other terminal of the reactor L.
Preferably, the other end of the test transformer SB is grounded.
At present, a long cable DL has a large distributed capacitor, which can generate large current and consume a lot of reactive power, and the existing device can not provide so much reactive power and can not realize detection; according to the utility model, the reactor L is connected in parallel, so that the current of the reactor L and the current of the capacitor of the long cable DL can be mutually offset; therefore, the test transformer SB can realize the voltage withstand test of a cable of several kilometers;
the single chip microcomputer 1 controls the device through the control switch QF, and when the control switch QF is closed, the device works.
The single chip microcomputer 1 controls the work of a generator M, and the generator M is used for driving a pressure regulating handle HG to move up and down.
The contact P of the pressure regulating handle HG is contacted with a tap on the test transformer SB, the reset position of the contact P is the first tap at the top, when the contact P of the pressure regulating handle HG is at the reset position, the output voltage is quite low and is only 200-300V; when a withstand voltage test is carried out, the generator M controls the contact P of the voltage regulating handle HG to move downwards, so that the voltage is boosted; when moving downwards, the number of turns of the primary coil of the test transformer SB is reduced, and the number of turns of the secondary coil is unchanged, so that the secondary voltage is higher and higher.
The voltage transformer TV is used for converting high voltage into low voltage and then collecting the low voltage by the singlechip 1;
because singlechip 1 gathers voltage data through voltage transformer TV, gathers current data through first current transformer TA0, through calculating the relation of current and voltage, the phase place of current and voltage, the active power that consumes to whether to calculate the long cable can satisfy the requirement.
The second current transformer TA1 is used for overcurrent protection, and when the single chip microcomputer 1 monitors that the current passing through the second current transformer TA1 is too large, the control switch QF is controlled to be switched off, so that the device is protected.
The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (3)
1. An intelligent light device for a long cable high-voltage alternating-current withstand voltage test is characterized by comprising a single chip microcomputer, a control switch, a generator, a voltage regulating handle, a first current transformer, a test transformer, a voltage transformer and a reactor;
the single chip microcomputer is respectively connected with the control switch, the generator, the test transformer, the first current transformer and the first end of the voltage transformer;
the generator and the control switch are respectively connected with the pressure regulating handle;
the contact of the voltage regulating handle is contacted with a tap on the test transformer;
one end of the test transformer is respectively connected with the third end of the voltage transformer and one end of the reactor;
one end of the reactor is also connected with the long cable;
the other end of the test transformer is respectively connected with the fourth end of the voltage transformer, the second end of the voltage transformer, the other end of the reactor and one end of the first current transformer;
the other end of the first current transformer is connected with the long cable.
2. The intelligent lightweight device for the long-cable high-voltage alternating-current withstand voltage test according to claim 1, further comprising a second current transformer, wherein the second current transformer is arranged on a circuit between the second end of the voltage transformer and the other end of the reactor.
3. The intelligent lightweight device for the long-cable high-voltage alternating-current withstand voltage test according to claim 1, wherein the other end of the test transformer is grounded.
Priority Applications (1)
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CN202122290530.2U CN216747949U (en) | 2021-09-22 | 2021-09-22 | Intelligent light device for long cable high-voltage alternating-current voltage withstand test |
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CN202122290530.2U CN216747949U (en) | 2021-09-22 | 2021-09-22 | Intelligent light device for long cable high-voltage alternating-current voltage withstand test |
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CN216747949U true CN216747949U (en) | 2022-06-14 |
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CN202122290530.2U Active CN216747949U (en) | 2021-09-22 | 2021-09-22 | Intelligent light device for long cable high-voltage alternating-current voltage withstand test |
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2021
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