CN114441913A - Portable intelligent withstand voltage tester for high-voltage motor - Google Patents
Portable intelligent withstand voltage tester for high-voltage motor Download PDFInfo
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- CN114441913A CN114441913A CN202210204291.0A CN202210204291A CN114441913A CN 114441913 A CN114441913 A CN 114441913A CN 202210204291 A CN202210204291 A CN 202210204291A CN 114441913 A CN114441913 A CN 114441913A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
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Abstract
The invention relates to the technical field of high-voltage motor insulation tests, in particular to a portable intelligent withstand voltage tester of a high-voltage motor, which comprises: the device comprises a box body with a pull ring, a box cover hinged with the box body, a power supply module, an insulation characteristic testing module, a voltage withstanding testing module, a calculation control module, a display module and an input module, wherein the power supply module, the insulation characteristic testing module, the voltage withstanding testing module and the calculation control module are arranged in the box body, the display module is arranged between the box body and the box cover and embedded on the surface of the box body, the input module is provided with a scanner, the power supply module is electrically connected with the calculation control module, and the calculation control module is electrically connected with the insulation characteristic testing module, the voltage withstanding testing module, the display module and the input module; the problem of making a round trip to change test instrument and connecting wire repeatedly can be avoided, experimenter's intensity of labour has been reduced, work efficiency has been improved.
Description
Technical Field
The invention relates to the technical field of high-voltage motor insulation testers, in particular to a portable intelligent withstand voltage tester for a high-voltage motor.
Background
In industries where most of steel, coal, cement, etc. are high power production equipment, high voltage motors are the most common power equipment. Because production equipment requires high power, if low voltage is adopted, current is high, the requirement on a power transmission line is high, and enterprises adopt high-voltage motors with relatively low comprehensive investment for reducing line loss and power distribution investment. The high-voltage motor is an important ring of enterprise safety production as a power source of production equipment, regular maintenance of the high-voltage motor is indispensable, and the insulation level of a stator winding of the motor is judged in one step which is crucial in maintenance. The insulation condition of the motor is generally determined by adopting a voltage withstand test, the voltage withstand test is divided into a direct current voltage withstand test and an alternating current voltage withstand test, the direct current voltage withstand test and the alternating current voltage withstand test cannot be replaced with each other, and the alternating current voltage withstand test can simulate the operation condition of the high-voltage motor in actual use to the maximum extent. The voltage withstand test is a destructive test, the voltage withstand test can be carried out only after the insulation characteristic test is qualified, and the conventional voltage withstand test and the insulation characteristic test are generally unsafe to control and measure manually, and time and labor are wasted, so that much inconvenience is brought to electrical testers.
Disclosure of Invention
The invention aims to solve the problems of time and labor waste and insecurity of a voltage withstand test in the prior art, and provides a portable intelligent voltage withstand tester for a high-voltage motor, which can avoid the problems of back-and-forth replacement of the tester and repeated connection, reduce the labor intensity of experimenters and improve the safety and the working efficiency.
In order to achieve the above object, the present invention provides a portable intelligent withstand voltage tester for a high voltage motor, comprising: the device comprises a box body with a pull ring, a box cover hinged with the box body, a power supply module, an insulation characteristic testing module, a voltage withstanding testing module, a calculation control module, a display module and an input module, wherein the power supply module, the insulation characteristic testing module, the voltage withstanding testing module and the calculation control module are arranged in the box body, and the display module and the input module are arranged between the box body and the box cover and embedded on the surface of the box body;
the insulation characteristic testing module is used for acquiring a measured value of an insulation characteristic index of the high-voltage motor and transmitting the measured value to the calculation control module;
the voltage-withstanding testing module is used for carrying out alternating current/direct current voltage-withstanding testing on the high-voltage motor and sending a testing value to the calculation control module, the voltage-withstanding testing module comprises a voltage regulator connected with a power supply through a relay self-locking circuit, the output end of the voltage regulator is connected with the input end of a transformer, the transformer is provided with a plurality of output ends, at least one output end is grounded through a milliammeter and a microammeter which are connected in series, at least one output end is connected with an alternating current testing end, at least one output end is connected with a direct current testing end through a high-voltage silicon stack, and the alternating current testing end is grounded through an electric reactor;
the calculation control module is used for receiving the measured value from the insulation characteristic test module and comparing the measured value with a setting value in the insulation characteristic test module, starting the voltage-withstanding test module when the setting value is met, and displaying prompt information on the display module when the setting value is not met.
Preferably, the insulation characteristic testing module comprises a megohmmeter for detecting insulation resistance and absorption ratio and a penicillin bridge for measuring dielectric loss, and the megohmmeter and the penicillin bridge are respectively connected with the calculation control module.
Preferably, a current limiting resistor is connected in series between the high-voltage silicon stack and the direct current test end.
Preferably, the microammeter is connected in parallel with a short circuit switch.
Preferably, relay self-locking circuit connects in parallel the power both ends, relay self-locking circuit includes ac contactor, ac contactor's two pairs of normally open contact establish ties the power with between the voltage regulator input, another pair of normally open contact of ac contactor establishes ties after the parallelly connected normally open button of normally open contact normally close button and ac contactor's coil.
Preferably, the input end of the transformer is provided with a current transformer which is connected with a coil of a current relay in series, and a pair of normally closed contacts of the current relay are positioned on the relay self-locking circuit and connected with the coil of the alternating current contactor in series for cutting off a power supply when overload or insulation breakdown occurs.
Preferably, the voltage regulator includes gear drive structure and connection the servo motor of calculation control module, servo motor drive gear drive structure realizes the step-up and the step-down of voltage regulator.
Preferably, the portable intelligent withstand voltage tester is provided with a buzzer for prompting insulation breakdown.
Preferably, the calculation control module is provided with a data storage unit and a data processing unit, and the data storage unit is provided with a data export port.
Preferably, the calculation control module is connected with a printer.
Preferably, the input module is provided with a scanner for scanning and collecting name plate information of the high-voltage motor.
Through the technical scheme, the voltage-withstanding testing module and the insulation characteristic testing module are integrated into the portable box body, the portable high-voltage motor insulation preventive experiment device is portable and light, the insulation preventive experiment of a high-voltage motor can be completed at one time, the problems of back-and-forth replacement of a testing instrument and repeated connection are avoided, the labor intensity of experimenters is reduced, the whole testing process is controlled through a program, omission is avoided, and the experiment safety is improved.
Additional features and advantages of the invention will be described in detail in the detailed description which follows.
Drawings
FIG. 1 is a schematic overall view of a portable intelligent withstand voltage tester for a high voltage motor according to a preferred embodiment of the present invention;
FIG. 2 is a schematic diagram of the module connection of the portable intelligent withstand voltage tester for the high-voltage motor according to a preferred embodiment of the present invention;
fig. 3 is a schematic circuit connection diagram of a voltage withstand test module according to a preferred embodiment of the present invention.
Description of the reference numerals
1, a box body; 2, a box cover; 3, a power supply module; 4, an insulation characteristic testing module; 5, a voltage withstanding test module; 6, calculating a control module; 61 a data storage unit; 62 a data processing unit; 7 a display module; and 8, inputting the module.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
In the present invention, the use of directional terms such as "upper, lower, left, right" generally means upper, lower, left, right as viewed with reference to the accompanying drawings, unless otherwise specified; "inner and outer" refer to the inner and outer relative to the profile of the components themselves.
As shown in fig. 1 to 3, the present invention provides a portable intelligent withstand voltage tester for a high-voltage motor, comprising: the device comprises a box body 1, a box cover 2 hinged with the box body 1, a power supply module 3, an insulation characteristic testing module 4, a voltage withstanding testing module 5, a calculation control module 6, a display module 7 and an input module 8, wherein the display module 7 is arranged in the box body 1 and is embedded between the box body 1 and the box cover 2, the input module 8 is provided with a scanner, the power supply module 3 is electrically connected with the calculation control module 6, and the calculation control module 6 is electrically connected with the insulation characteristic testing module 4, the voltage withstanding testing module 5, the display module 7 and the input module 8;
the insulation characteristic testing module 4 is used for collecting a measured value of an insulation characteristic index of the high-voltage motor and transmitting the measured value to the calculation control module 6;
the voltage-withstanding test module 5 is used for performing alternating current/direct current voltage-withstanding test on the high-voltage motor and sending a test value to the calculation control module 6, the voltage-withstanding test module 5 comprises a voltage regulator connected with a power supply through a relay self-locking circuit, the output end of the voltage regulator is connected with the input end of a transformer, the transformer is provided with a plurality of output ends, at least one output end is grounded through a milliammeter and a microampere meter which are connected in series, at least one output end is connected with an alternating current test end, at least one output end is connected with a direct current test end through a high-voltage silicon stack, and the alternating current test end is grounded through an electric reactor;
the calculation control module 6 is configured to receive the measurement value from the insulation characteristic test module 4 and compare the measurement value with a setting value in the insulation characteristic test module, start the withstand voltage test module 5 when the setting value is satisfied, and display a prompt message on the display module 7 when the setting value is not satisfied.
Specifically, the voltage-withstanding testing module and the insulation characteristic testing module are integrated into a portable box, a port of an alternating current/direct current testing end is arranged on the side face of the box, the box is made of light materials such as aluminum alloy, a computing control module is used for regulating and controlling a voltage-withstanding tester to perform an insulation characteristic experiment, a control program is loaded in the computing control module, test modes of high-voltage motors of different models are stored in the control program, an input module of the testing device is provided with a scanner, and the test modes of the same model in the computing control module are called out and tested by scanning a nameplate of the high-voltage motor; storing an insulation characteristic experiment index setting value in each test mode, performing a voltage withstand experiment when a measured value of the insulation characteristic index meets the setting value, otherwise displaying a disqualified index in a display module to prompt an inspector to further process, and performing the voltage withstand experiment after the insulation characteristic index is qualified; before testing, the voltage-withstanding test module and the insulation characteristic test module are connected with relevant positions (such as windings) of the high-voltage motor, and then testing is carried out according to a test mode so as to achieve the purpose of intelligent testing; therefore, the problem that the test instrument is replaced back and forth and the connection is repeated is avoided, the labor intensity of experimenters is reduced, the whole test process is controlled by a program, and the omission of the safety of the experiment is avoided.
The circuit diagram of the voltage withstand test module is shown in fig. 3, the calculation control module controls the voltage regulator to boost voltage for voltage withstand test, the direct current test end is output after being rectified by the high-voltage silicon stack, and during a power frequency alternating current experiment, an electric reactor matched with a high-voltage motor is connected in parallel at the alternating current test end so as to complete the alternating current voltage withstand experiment; the reactor can compensate the capacitance current in the parallel loop, and active components borne by the transformer and the power supply are reduced.
According to a preferred embodiment of the present invention, the insulation characteristic test module 4 comprises a megohmmeter for detecting insulation resistance and absorption ratio and a penicillin bridge for measuring dielectric loss, each of which is connected to the calculation control module 6.
According to a preferred embodiment of the present invention, a current limiting resistor is connected in series between the high voltage silicon stack and the dc test terminal.
According to a preferred embodiment of the invention, the microammeter is connected in parallel with a short-circuit switch.
According to a preferred embodiment of the present invention, the relay self-locking circuit is connected in parallel to two ends of the power supply, the relay self-locking circuit includes an ac contactor, two pairs of normally open contacts of the ac contactor are connected in series between the power supply and the input end of the voltage regulator, and the other pair of normally open contacts of the ac contactor is connected in parallel to the normally open button and then connected in series to the normally closed button and a coil of the ac contactor. It should be noted that, when carrying out withstand voltage experiment, in case the high-voltage motor insulation is punctured, current relay cuts off the power, can avoid the insulation to puncture further and enlarge, protects portable intelligent withstand voltage tester not damaged simultaneously.
According to a preferred embodiment of the invention, the input end of the transformer is provided with a current transformer which is connected with a coil of a current relay in series, and a pair of normally closed contacts of the current relay are positioned in the relay self-locking circuit and connected with the coil of the alternating current contactor in series for cutting off the power supply when overload or insulation breakdown occurs. The invention discloses a preferable transformer, which adopts a high-efficiency dry type transformer manufactured by a high-permeability R-shaped iron core as a high-voltage source, wherein the high-voltage output is output in two paths, one path is power-frequency alternating current output, the other path is rectified by a high-voltage silicon pestle and then is output as high-voltage direct current, the low-voltage side uses an auto-coupling voltage regulator as voltage regulation and is provided with an overcurrent protection device.
According to a preferred embodiment of the present invention, the voltage regulator includes a gear transmission structure and a servo motor connected to the calculation control module, and the servo motor drives the gear transmission structure to realize the voltage increase and decrease of the voltage regulator.
According to a preferred embodiment of the invention, the portable intelligent withstand voltage tester is provided with a buzzer for prompting insulation breakdown.
According to a preferred embodiment of the invention, the calculation control module 6 is provided with a data storage unit 61 and a data processing unit 62, the data storage unit 61 being provided with a data export. The important point is that data modeling software can be installed in the calculation control module and used for predicting the probability of the insulation breakdown of the high-voltage motor so as to prompt a production enterprise to pay more attention, and the data storage unit can store the test result every time and provide a large amount of data support for data modeling.
According to a preferred embodiment of the invention, the calculation control module 6 is connected to a printer.
In the invention, each control element of the voltage-withstanding test module is electrically connected with the calculation control module, circuit connection modes which can realize functions of the modules in the prior art can be used for the voltage-withstanding test module, and the positions of the modules in the box body can be randomly arranged under the condition of not influencing the function realization.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the specific features in any suitable way, and the invention will not be further described in relation to the various possible combinations in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.
Claims (10)
1. The utility model provides a portable intelligent withstand voltage tester of high-voltage motor which characterized in that, this portable intelligent withstand voltage tester includes: the device comprises a box body (1) with a pull ring, a box cover (2) hinged with the box body (1), a power module (3) arranged in the box body (1), an insulation characteristic testing module (4), a voltage withstanding testing module (5), a calculation control module (6), a display module (7) which is arranged between the box body (1) and the box cover (2) and is embedded on the surface of the box body (1), and an input module (8) provided with a scanner, wherein the power module (3) is electrically connected with the calculation control module (6), and the calculation control module (6) is electrically connected with the insulation characteristic testing module (4), the voltage withstanding testing module (5), the display module (7) and the input module (8);
the insulation characteristic testing module (4) is used for collecting a measured value of an insulation characteristic index of the high-voltage motor and transmitting the measured value to the calculation control module (6);
the voltage-withstanding testing module (5) is used for carrying out alternating current-direct current voltage-withstanding testing on the high-voltage motor and sending a testing value to the calculation control module (6), the voltage-withstanding testing module (5) comprises a voltage regulator connected with a power supply through a relay self-locking circuit, the output end of the voltage regulator is connected with the input end of a transformer, the transformer is provided with a plurality of output ends, at least one output end is grounded through a milliammeter and a microammeter which are connected in series, at least one output end is connected with an alternating current testing end, at least one output end is connected with a direct current testing end through a high-voltage silicon stack, and the alternating current testing end is grounded through an electric reactor;
the calculation control module (6) is used for receiving the measured value from the insulation characteristic test module (4) and comparing the measured value with a setting value in the insulation characteristic test module, starting the voltage-resistant test module (5) when the setting value is met, and displaying prompt information on the display module (7) when the setting value is not met.
2. The portable intelligent withstand voltage tester according to claim 1, wherein the insulation characteristic test module (4) comprises a megohmmeter for detecting insulation resistance and absorption ratio and a cillin bridge for measuring dielectric loss, each of the megohmmeter and the cillin bridge being connected to the calculation control module (6).
3. The portable intelligent withstand voltage tester according to claim 1, wherein a current limiting resistor is connected in series between the high voltage silicon stack and the direct current test terminal.
4. The portable intelligent withstand voltage tester according to claim 1, wherein the microammeter is connected in parallel with a short circuit switch.
5. The portable intelligent withstand voltage tester according to any one of claims 1 to 3, wherein the relay self-locking circuit is connected in parallel at two ends of the power supply, the relay self-locking circuit comprises an alternating current contactor, two pairs of normally open contacts of the alternating current contactor are connected in series between the power supply and the input end of the voltage regulator, and the other pair of normally open contacts of the alternating current contactor are connected in parallel with the normally open button and then connected in series with a normally closed button and a coil of the alternating current contactor.
6. The portable intelligent withstand voltage tester according to claim 5, wherein the transformer input end is provided with a current transformer connected in series with a coil of a current relay, and a pair of normally closed contacts of the current relay are positioned in the relay latching circuit and connected in series with the coil of the alternating current contactor, and are used for cutting off power supply in case of overload or insulation breakdown.
7. The portable intelligent withstand voltage tester according to claim 1, wherein the voltage regulator comprises a gear transmission structure and a servo motor connected with the calculation control module, and the servo motor drives the gear transmission structure to realize the voltage boosting and the voltage reduction of the voltage regulator.
8. The portable intelligent withstand voltage tester according to claim 1, wherein the portable intelligent withstand voltage tester is provided with a buzzer for prompting insulation breakdown.
9. The portable intelligent withstand voltage tester according to claim 1, wherein the calculation control module (6) is provided with a data storage unit (61) and a data processing unit (62), the data storage unit (61) being provided with a data export port.
10. The portable intelligent withstand voltage tester according to claim 1, wherein the calculation control module (6) is connected to a printer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210204291.0A CN114441913A (en) | 2022-03-02 | 2022-03-02 | Portable intelligent withstand voltage tester for high-voltage motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210204291.0A CN114441913A (en) | 2022-03-02 | 2022-03-02 | Portable intelligent withstand voltage tester for high-voltage motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114441913A true CN114441913A (en) | 2022-05-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210204291.0A Pending CN114441913A (en) | 2022-03-02 | 2022-03-02 | Portable intelligent withstand voltage tester for high-voltage motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114441913A (en) |
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2022
- 2022-03-02 CN CN202210204291.0A patent/CN114441913A/en active Pending
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