CN212646809U

CN212646809U - Insulation resistance tester for preventing reverse connection of high-voltage terminal and grounding terminal

Info

Publication number: CN212646809U
Application number: CN202021009939.1U
Authority: CN
Inventors: 李培; 李宏博; 牛林; 尹青华; 高楠楠; 张彦; 裴英; 张燕燕; 李海凤; 郭良峰; 许敏敏; 张新磊
Original assignee: State Grid Corp of China SGCC; State Grid of China Technology College; Shandong Electric Power College
Current assignee: State Grid Corp of China SGCC; State Grid of China Technology College; Shandong Electric Power College
Priority date: 2020-06-04
Filing date: 2020-06-04
Publication date: 2021-03-02
Anticipated expiration: 2030-06-04

Abstract

The utility model provides a prevention high voltage terminal connects reverse insulation resistance tester with ground terminal, include: a power supply, an output terminal, a shield terminal, and a ground terminal; the negative pole of the power supply is electrically connected with the shielding terminal, the negative pole is also electrically connected with one end of the output terminal, and the positive pole of the power supply is electrically connected with the grounding terminal after being connected with the switch in series to form a detection circuit; the other end of the output terminal is connected with an alarm device in series and is connected with a grounding terminal to form an alarm circuit; when the high-voltage personnel misoperation occurs, the output terminal of the test wire is connected into the jack of the grounding terminal of the instrument, and the grounding terminal joint of the test wire is connected into the jack of the output terminal of the instrument, the alarm circuit is connected, the tester is reminded to check the wiring, and the wiring is corrected.

Description

Insulation resistance tester for preventing reverse connection of high-voltage terminal and grounding terminal

Technical Field

The utility model relates to an insulation resistance tester especially relates to an insulation resistance tester that can effectively prevent high voltage terminal and ground terminal and connect conversely.

Background

The insulation resistance test is a relatively conventional means for testing and inspecting the insulation performance of electrical equipment, and is also a preparatory test of a high-voltage test, before a relatively dangerous and destructive test, the insulation resistance test is carried out, so that relatively large defects of an insulation material can be found in advance, corresponding measures are taken in advance, and the insulation of a tested article is prevented from being completely damaged. The purpose of measuring the insulation resistance is to detect defects such as moisture or porcelain bushing cracks, the method is the simplest and most convenient auxiliary method for field inspection of the insulation state of equipment, and the method is favorable for finding the defects such as moisture, dirt, serious degradation of insulating oil, serious thermal aging and the like.

The insulation resistance is the ratio of the dc voltage applied to the sample to the leakage current (or conductance current) flowing through the sample. The DC voltage applied to the test article is high voltage with negative polarity (power supply negative polarity output), which is helpful for sensitively finding the insulation condition of the test article, simultaneously improving the breakdown voltage of the test article, and effectively protecting the personal and the safety of the test article. When some testers perform insulation resistance tests, the L \ E terminals are connected reversely by mistake (the L terminal is a high-voltage output terminal, and the E terminal is a ground terminal), so that a finished loop can still be formed, but the L terminal is output in a positive polarity, which not only causes misjudgment of results, but also may cause injury to human bodies and equipment.

Disclosure of Invention

In order to solve the technical problems and avoid the phenomena, the insulation resistance tester is improved. When the L/E terminal is reversely connected, the instrument gives out light and gives an alarm, and voice prompt is carried out to prompt a tester to correct the wiring.

In order to achieve the above object, the utility model adopts the following technical scheme:

the utility model provides a prevention high voltage terminal connects reverse insulation resistance tester with ground terminal, include: a power supply, an output terminal, a shield terminal, and a ground terminal; the negative pole of the power supply is electrically connected with the shielding terminal, the negative pole is also electrically connected with one end of the output terminal, and the positive pole of the power supply is electrically connected with the grounding terminal after being connected with the switch in series to form a detection circuit; the other end of the output terminal is connected with an alarm device in series and is connected with a grounding terminal to form an alarm circuit.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses improve the insulation resistance tester, maloperation appears when the high pressure personnel, the output terminal of test wire inserts in the ground terminal's of instrument jack, when the ground terminal of test wire connects the output terminal jack of inserting the instrument in, there is positive potential difference between the output terminal \ ground terminal, the diode switch-on, the switch-on of way of reporting to the police reminds testing personnel to inspect the wiring, and correct wiring, help the staff correctly carry out the use of insulation resistance tester, good action habit is supported, cultivate rigorous work and do the wind.

2. The utility model discloses an in the output terminal of test wire inserts the jack of the output terminal of instrument, the ground terminal of test wire inserts the jack of the ground terminal of instrument, output terminal's output negative polarity high voltage, ground terminal is positive polarity high voltage, and the inside diode of instrument can't switch on, and speaker and illuminator can not work, have improved detection efficiency and stability, do benefit to the inspection that carries out the insulation resistance tester.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

Fig. 1 is the structure diagram of the insulation resistance tester for preventing the high-voltage terminal and the grounding terminal from being connected reversely.

Fig. 2 is a schematic structural diagram of an insulation resistance tester in the background art.

The device comprises a high-voltage output terminal L1, a high-voltage output terminal L2, a shielding terminal G3, a grounding terminal E, a shielding terminal E4, a shell 5, a diode 6, a loudspeaker 7, a light-emitting indicator lamp 8, an internal power supply 9 and a test wire.

The specific implementation mode is as follows:

the present invention will be further explained with reference to the accompanying drawings and examples.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, 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 application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

In the present invention, the terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, and are only the terms determined for convenience of describing the structural relationship of each component or element of the present invention, and are not specific to any component or element of the present invention, and are not to be construed as limiting the present invention.

In the present invention, terms such as "fixedly connected", "connected", and the like are to be understood in a broad sense, and may be a fixed connection, or an integral connection or a detachable connection; may be directly connected or indirectly connected through an intermediate. The meaning of the above terms in the present invention can be determined according to specific situations by persons skilled in the art, and should not be construed as limiting the present invention.

Example 1

An insulation resistance tester for preventing a high-voltage terminal and a ground terminal from being reversely connected comprises: a power supply, an output terminal, a shield terminal, and a ground terminal; the negative pole of the power supply is electrically connected with the shielding terminal, the negative pole is also electrically connected with one end of the output terminal, and the positive pole of the power supply is electrically connected with the grounding terminal after being connected with the switch in series to form a detection circuit; the other end of the output terminal is connected with an alarm device in series and is connected with a grounding terminal to form an alarm circuit.

Furthermore, the output terminal internally comprises a detection end and an alarm circuit connecting end, and the detection end is connected with a circuit which is connected with the negative electrode of the power supply and the output terminal; the alarm circuit connecting end is connected with the alarm device and the diode in series and is connected with the grounding terminal to form the alarm circuit.

Furthermore, the grounding terminal comprises two wiring ports inside, and the two wiring ports are respectively connected with the positive electrode of the power supply and the alarm circuit connecting end of the output terminal; when the test wire is connected to the grounding terminal, the two wiring ports are conducted.

Further, the alarm device comprises a light-emitting indicator lamp.

Further, the diode is a point contact type diode, a surface contact type diode or a planar type diode.

Furthermore, the positive end of the diode is connected with the alarm circuit connecting end of the output terminal, and the negative end of the diode is connected with the grounding terminal.

Furthermore, the output terminal, the shielding terminal and the wiring terminal are connected to a test line.

Furthermore, when the test line is reversely connected with the output terminal and the grounding terminal in the on state of the switch, a positive potential difference exists between the output terminal and the grounding terminal, the diode is connected, and the alarm circuit is connected.

Furthermore, the alarm device also comprises a loudspeaker, and the loudspeaker is electrically connected with the light-emitting indicator lamp.

Further, the output terminal is a high-voltage output terminal.

Further, still include the casing, inside power and the circuit of setting up of casing, the casing surface sets up output terminal, shielding terminal, ground terminal and switch.

The utility model discloses under the normal condition, the L termination of test wire is gone into in the L end jack of instrument, and the E termination of test wire is gone into in the E end jack of instrument. The terminal L outputs negative polarity high voltage, and the terminal E is positive polarity high voltage. The diode in the instrument can not be conducted, and the loudspeaker and the light-emitting device can not work.

When the high-voltage personnel misoperation occurs, the L end of the test wire is connected into the E end jack of the instrument, and the E end of the test wire is connected into the L end jack of the instrument, a positive potential difference exists between the L/E, the diode is connected, the alarm circuit is connected, and the tester is reminded to check the wiring.

When the L/E terminal is reversely connected, the instrument gives out light and gives an alarm, and voice prompt is carried out to prompt a tester to correct the wiring. The utility model discloses help the staff correctly to carry out the use of insulation resistance tester, support good action habit, cultivate rigorous work and do the wind.

Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.

Claims

1. The utility model provides a prevention high voltage terminal connects anti-insulation resistance tester with ground terminal which characterized in that includes: a power supply, an output terminal, a shield terminal, and a ground terminal; the negative pole of the power supply is electrically connected with the shielding terminal, the negative pole is also electrically connected with one end of the output terminal, and the positive pole of the power supply is electrically connected with the grounding terminal after being connected with the switch in series to form a detection circuit; the other end of the output terminal is connected with an alarm device in series and is connected with a grounding terminal to form an alarm circuit.

2. The insulation resistance tester as claimed in claim 1, wherein the output terminal includes a detection terminal and an alarm circuit connection terminal therein, the detection terminal is connected to a circuit in which a negative electrode of a power supply is connected to the output terminal; the alarm circuit connecting end is connected with the alarm device and the diode in series and is connected with the grounding terminal to form the alarm circuit.

3. The insulation resistance tester as recited in claim 1, wherein said ground terminal includes two connection ports therein, which are connected to the positive electrode of the power supply and the alarm circuit connection terminal of the output terminal, respectively; when the test wire is connected to the grounding terminal, the two wiring ports are conducted.

4. The insulation resistance tester as recited in claim 1, wherein said alarm means comprises a light emitting indicator light.

5. The insulation resistance tester as recited in claim 2, wherein said diode is a point contact diode.

6. The insulation resistance tester as recited in claim 2, wherein a positive terminal of the diode is connected to the alarm circuit connection terminal of the output terminal, and a negative terminal of the diode is connected to the ground terminal.

7. The insulation resistance tester as recited in claim 1, wherein the output terminal, the shield terminal and the connection terminal are connected to a test line.

8. The insulation resistance tester as recited in claim 1, wherein in a state where the switch is turned on, when the test line is connected to the output terminal and the ground terminal in the opposite direction, a positive potential difference exists between the output terminal and the ground terminal, the diode is turned on, and the alarm circuit is turned on.

9. The insulation resistance tester as recited in claim 1, wherein said alarm means further comprises a speaker, said speaker being electrically connected to a light indicator.

10. The insulation resistance tester as recited in claim 1, further comprising a housing, wherein the power supply and the circuit are disposed inside the housing, and the output terminal, the shield terminal, the ground terminal and the switch are disposed on an outer surface of the housing.