CN207866897U - insulation resistance tester - Google Patents

Abstract

The utility model discloses a kind of Insulation Resistance Testers; including casing and the electronic device being arranged in casing; electronic device includes measuring circuit device, control device, leak protection cell arrangement, display unit device, memory unit, interface unit device, power unit device, numerical controlled voltage device, DC converter and bleeder circuit device, and casing surface is provided with the first output interface and the first input interface.The utility model solves the problems, such as accurately to measure relatively low insulation impedance, and complete machine power output is big, especially applies and is tested on the larger circuit of leakage current, can reduce influence of the leakage current to measurement accuracy, improve the accuracy of Insulation test.

Description

Insulation Resistance Tester

technical field

The utility model relates to the technical field of insulation testing, in particular to an insulation resistance tester.

Background technique

Insulation resistance tester is commonly used to measure the resistance value of various insulating materials, such as measuring the insulation properties of motors, cables, transformers and electrical equipment. In practical applications, there are often leakage problems of test equipment. Due to the connection of low insulation resistance in the line, it is often improperly connected in parallel with the tested sample, sampling resistor, etc., which has a great impact on the measurement results. Test effects that cause measurement inaccuracies and errors.

For example, the Chinese patent with publication number CN104101784A proposes a detection circuit for insulation resistance, including: DC/DC power supply module; The positive pole or negative pole of the high-voltage bus is connected, and the second end is grounded through the first resistor to adjust the current flow direction; the power sampling module collects the current flowing through the first DC/DC steering module in different directions after the first switch is switched to the positive pole of the high-voltage bus. The voltage and the second voltage; the current sampling module collects the first current and the second current flowing through the DC/DC steering module in different directions after the first switch is switched to the positive terminal of the high-voltage bus; the controller, according to the first and second The two voltages, the first and the second current obtain the insulation resistance between the positive pole of the high voltage busbar and the ground. The technical solution disclosed in the patent specification can be used to collect the insulation resistance of the high-voltage busbar to the ground, which has the advantages of eliminating the interference from the whole vehicle and the influence of parasitic capacitance, and can improve the safety of the whole vehicle. However, there are still unsolvable problems, such as Test flexibility, precision, and leakage of test equipment.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art and provide an insulation resistance tester, which improves the accuracy and precision of the test, and improves the flexibility and universality of equipment use.

The purpose of this utility model is achieved through the following technical solutions: an insulation resistance tester, including a casing and an electronic device arranged in the casing, the electronic device includes a measuring circuit device, a controller device, and a leakage protection unit device, a display unit device, a storage unit device, an interface unit device, a power supply unit device, a digitally controlled voltage regulating device, a DC conversion device, and a voltage dividing circuit device, and a first output interface and a first input interface are arranged on the surface of the casing; The first input interface is connected to the first input terminal of the measurement circuit device, the input and output terminals of the measurement circuit device are connected to the first input and output terminal of the controller device, and the second input and output terminal of the controller device is connected to the display unit The input and output terminals of the device are connected, the third input and output terminals of the controller device are connected with the input and output terminals of the storage unit device, the fourth input and output terminals of the controller device are connected with the input and output terminals of the interface unit device, and the The fifth input and output end of the controller device is connected to the input and output end of the numerically controlled pressure regulating device, the first input end of the controller device is connected to the output end of the leakage protection unit device, and the second input end of the controller device is The terminal is connected to the output terminal of the power supply unit device, the output terminal of the digital control voltage regulating device is connected to the input terminal of the DC converting device, the output terminal of the DC converting device is connected to the first output interface, and the voltage dividing circuit device The input terminal is connected to the output terminal of the DC converting device, and the output terminal of the voltage dividing circuit device is connected to the second input terminal of the measuring circuit device.

Further, the DC conversion device includes a step-up transformer, the input end of the step-up transformer is connected to the output end of the digitally controlled voltage regulating device, and the output end of the step-up transformer is connected to the first output interface.

Further, the interface unit device includes an RS232 interface unit device.

Further, the power supply unit device includes one or more of a rechargeable battery, a charger and a commercial power supply.

Further, the controller device includes a 32-bit microcontroller.

Further, the step-up transformer is used to output DC high voltage of 0-5kv.

The beneficial effects of the utility model are:

(1) The utility model adopts a measuring circuit device, a controller device, a leakage protection unit device, a display unit device, a storage unit device, an interface unit device, a power supply unit device, a numerical control voltage regulating device, a DC conversion device, a voltage dividing circuit device, The first output interface and the first input interface, etc., solve the problem of accurately measuring lower insulation resistance. The output power of the whole machine is large, especially when it is used for testing on lines with large leakage current, which can significantly reduce the impact of leakage current on measurement accuracy. impact, improve the accuracy of the test, the test process only needs to connect the corresponding high-voltage lines and signal lines to the interface on the casing, which simplifies the structure of the test device and is convenient for operation and use. The voltage device can adapt to the test requirements in different electric field environments, which improves the flexibility and versatility of the equipment, and can be widely used in measuring the insulation resistance of transformers, transformers, generators, high-voltage motors, power capacitors, power cables, and lightning arresters. testing scenarios.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

Fig. 1 is the structural representation of the utility model.

Detailed ways

The technical scheme of the utility model is further described in detail below in conjunction with the accompanying drawings, but the protection scope of the utility model is not limited to the following description. Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless expressly stated otherwise, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

Specific embodiments of the present utility model will be described in detail below, and it should be noted that the embodiments described here are only for illustration and are not intended to limit the present utility model. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one of ordinary skill in the art that these specific details need not be employed to practice the invention. In other instances, well-known circuits and the like are not described in detail in order to avoid obscuring the present invention.

As shown in Figure 1, an insulation resistance tester includes a casing and an electronic device arranged in the casing, the electronic device includes a measuring circuit device, a controller device, a leakage protection unit device, a display unit device, a storage unit device, The interface unit device, the power supply unit device, the digital control voltage regulating device, the DC conversion device and the voltage dividing circuit device are provided with a first output interface and a first input interface on the surface of the casing; the first input interface and the first input of the measurement circuit device The input and output terminals of the measuring circuit device are connected with the first input and output terminals of the controller device, the second input and output terminals of the controller device are connected with the input and output terminals of the display unit device, and the third input and output terminals of the controller device It is connected with the input and output terminals of the storage unit device, the fourth input and output terminal of the controller device is connected with the input and output terminals of the interface unit device, and the fifth input and output terminal of the controller device is connected with the input and output terminals of the digital control voltage regulating device, and the control The first input end of the controller device is connected to the output end of the leakage protection unit device, the second input end of the controller device is connected to the output end of the power supply unit device, the output end of the digital control voltage regulating device is connected to the input end of the DC conversion device, The output end of the DC converting device is connected to the first output interface, the input end of the voltage dividing circuit device is connected to the output end of the DC converting device, and the output end of the voltage dividing circuit device is connected to the second input end of the measuring circuit device.

Optionally, the DC conversion device includes a step-up transformer, an input end of the step-up transformer is connected to an output end of the digitally controlled voltage regulating device, and an output end of the step-up transformer is connected to the first output interface.

Optionally, the interface unit device includes an RS232 interface unit device.

Optionally, the power supply unit device includes one or more of a rechargeable battery, a charger and a commercial power supply.

Optionally, the controller means comprises a 32-bit microcontroller.

Optionally, a step-up transformer is used to output a DC high voltage of 0-5kv.

For the rest of the technical features in this embodiment, those skilled in the art can flexibly select according to the actual situation and meet different specific actual needs. It will be apparent, however, to one of ordinary skill in the art that these specific details need not be employed to practice the invention. In other examples, in order to avoid confusing the utility model, the known components, structures or parts are not specifically described, and all of them are within the scope of technical protection defined by the technical solution claimed in the claims of the utility model.

In the description of the present utility model, unless otherwise specified and limited, the terms "installation", "installation", "connection" and "connection" all have broad meanings and should be understood broadly by those skilled in the art. For example, it can be a fixed connection, or a movable connection, or an integral connection, or a partial connection, it can be a mechanical connection, it can also be an electrical connection, it can be a direct connection, or it can be an indirect connection through an intermediary. It can be the internal communication of two elements, etc. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific situation, that is, the expression of the literal language can be flexibly corresponding to the implementation of the actual technology, The wording and language (including drawings) of the description of the utility model do not constitute any single restrictive interpretation of the claims.

Modifications and changes made by those skilled in the art do not depart from the spirit and scope of the utility model, and should all be within the protection scope of the appended claims of the utility model. In the foregoing description, numerous specific details have been set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one of ordinary skill in the art that these specific details need not be employed to practice the invention. In other instances, in order to avoid obscuring the present invention, well-known technologies are not described in detail, such as specific construction details, operating conditions and other technical conditions.

Claims (6)

1. An insulation resistance tester, characterized in that it comprises a casing and an electronic device arranged in the casing, and the electronic device includes a measuring circuit device, a controller device, a leakage protection unit device, a display unit device, a storage unit The device, the interface unit device, the power supply unit device, the digital control voltage regulating device, the DC conversion device and the voltage dividing circuit device are provided with a first output interface and a first input interface on the surface of the casing; The first input interface is connected to the first input terminal of the measurement circuit device, the input and output terminals of the measurement circuit device are connected to the first input and output terminal of the controller device, and the second input and output terminal of the controller device is connected to the The input and output terminals of the display unit device are connected, the third input and output terminals of the controller device are connected with the input and output terminals of the storage unit device, and the fourth input and output terminals of the controller device are connected with the input and output terminals of the interface unit device , the fifth input and output end of the controller device is connected to the input and output end of the numerically controlled pressure regulating device, the first input end of the controller device is connected to the output end of the leakage protection unit device, and the first input end of the controller device is connected The two input ends are connected to the output end of the power supply unit device, the output end of the digital control voltage regulating device is connected to the input end of the DC conversion device, the output end of the DC conversion device is connected to the first output interface, and the voltage divider circuit The input end of the device is connected to the output end of the DC conversion device, and the output end of the voltage dividing circuit device is connected to the second input end of the measuring circuit device. 2. A kind of insulation resistance tester according to claim 1, it is characterized in that, described DC conversion device comprises step-up transformer, and the input end of described step-up transformer is connected with the output end of numerically controlled voltage regulating device, and described The output end of the step-up transformer is connected to the first output interface. 3. The insulation resistance tester according to claim 1, wherein the interface unit device comprises an RS232 interface unit device. 4. The insulation resistance tester according to claim 1, wherein the power supply unit device comprises one or more of a rechargeable battery, a charger and a commercial power supply. 5. A kind of insulation resistance tester according to claim 1, is characterized in that, described controller device comprises 32 microcontrollers. 6 . The insulation resistance tester according to claim 2 , wherein the step-up transformer is used to output DC high voltage of 0-5kv.