CN217034119U - Testing device - Google Patents

Abstract

The utility model relates to a testing device, which comprises a testing mechanism; the testing mechanism comprises a power supply, a connecting unit and an acquisition module, wherein the power supply is electrically connected with the input end of the connecting unit, the output end of the connecting unit is used for being electrically connected with the capacitor to be tested, and the acquisition module is used for being connected with the capacitor to be tested; the power supply is used for inputting the output alternating voltage to the connecting unit; the connecting unit is used for regulating the alternating-current voltage into a preset alternating-current voltage, rectifying the preset alternating-current voltage into an adjustable direct-current voltage, and transmitting the direct-current voltage to the capacitor to be tested; the acquisition module is used for acquiring voltage value and/or resistance value signals of the capacitor to be detected; the acquisition module is arranged to monitor the capacitor to be tested in real time, so that compared with the traditional test, errors caused by human factors are reduced, and the test accuracy is improved; meanwhile, the testing efficiency is improved, and the labor intensity of testing personnel is reduced.

Description

Testing device

Technical Field

The utility model relates to the technical field of testing devices, in particular to a testing device.

Background

At present, the factory test of the existing low-voltage capacitor and low-voltage complete capacitance compensation cabinet generally adopts a test method of adding high-voltage rectifying equipment by a voltage regulator, the tested compensation capacitor is charged to a rated voltage peak voltage according to the national standard, a universal meter or a direct-current voltage divider is used for detecting the voltage value of the tested compensation capacitor, after the tested compensation capacitor reaches the peak voltage, a power supply is disconnected, manual timing is started, the tested compensation capacitor discharges to 50V/75V (different standards) from the rated voltage peak value within a specified time (3min), and the discharge device of the compensation capacitor is considered to be in accordance with the national standard and qualified.

However, when the three-phase compensation capacitor is tested, only phase-by-phase testing can be performed, so that the testing efficiency is low and the testing task is heavy; meanwhile, the human factors of test timing can cause errors in the test result.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide a testing device which has the advantages that the testing efficiency can be improved, and the testing task is lightened; meanwhile, full-automatic testing is realized, human errors are reduced, and the accuracy of a testing structure is improved.

The above object of the present invention is achieved by the following technical solutions: a test device includes a test mechanism; the testing mechanism comprises a power supply, a connecting unit and an acquisition module, wherein the power supply is electrically connected with the input end of the connecting unit, the output end of the connecting unit is used for being electrically connected with a capacitor to be tested, and the acquisition module is used for being connected with the capacitor to be tested; the power supply is used for inputting the output alternating voltage to the connecting unit; the connecting unit is used for regulating the alternating-current voltage into a preset alternating-current voltage, rectifying the preset alternating-current voltage into an adjustable direct-current voltage, and transmitting the direct-current voltage to the capacitor to be tested; the acquisition module is used for acquiring voltage value and/or resistance value signals of the capacitor to be detected.

Preferably, in the testing device provided by the present invention, the connection unit includes a voltage regulation module and a control module, an input end of the voltage regulation module is electrically connected to the power supply, an output end of the voltage regulation module is electrically connected to an input end of the control module, and an output end of the control module is used for electrically connecting to the capacitor to be tested; the voltage regulating module is used for regulating the alternating voltage into the preset alternating voltage and rectifying the preset alternating voltage into adjustable direct voltage; the control module is used for controlling the direct-current voltage output by the voltage regulating module to be matched with the phase number of the capacitor to be tested.

Preferably, in the testing device provided by the present invention, the voltage regulating module includes a voltage regulator and a rectifier, an input end of the voltage regulator is electrically connected to the power supply, an output end of the voltage regulator is electrically connected to an input end of the rectifier, and an output end of the rectifier is electrically connected to an input end of the control module; the voltage regulator is used for converting the alternating voltage into the preset alternating voltage; the rectifier is used for rectifying the preset alternating current voltage into the adjustable direct current voltage.

Preferably, in the testing apparatus provided by the present invention, the control module includes at least one relay, an input end of the relay is electrically connected to an output end of the rectifier, an output end of the relay is used for being electrically connected to the capacitor to be tested, and the dc voltage output by the rectifier is matched with the phase number of the capacitor to be tested by switching on and off the relay.

Preferably, in the testing device provided by the utility model, the testing mechanism further comprises a control unit, and the acquisition module and the connecting unit are both in communication connection with the control unit; and the control unit is used for receiving the voltage value and/or resistance value signal and issuing a control instruction to the connecting unit.

Preferably, the testing apparatus provided by the present invention further comprises a control panel, wherein the control panel is in communication connection with the control unit to implement human-computer interaction between the control panel and the control unit, and the human-computer interaction comprises: the control panel issues a test function instruction to the control unit and/or the control unit uploads test result data to the control panel.

Preferably, the testing device provided by the utility model further comprises a box body, an end cover and a mounting plate, wherein the box body is enclosed into an accommodating cavity, the mounting plate is inserted into the accommodating cavity, the testing mechanism is accommodated in the accommodating cavity and positioned at the bottom of the mounting plate, the input end of the connecting unit and the output end of the connecting unit are inserted into the mounting plate, and the control panel is arranged on the top surface of the mounting plate; the end cover is used for covering the top end of the containing cavity, is connected with the box body through a rotating shaft and can rotate relative to the box body.

Preferably, the testing device provided by the utility model further comprises a micro printer, wherein the micro printer is arranged on the mounting plate and is used for printing the measurement result data.

Preferably, in the testing device provided by the present invention, the mounting plate is provided with a USB interface, and the external device is connected to the control unit through the USB interface to update the program of the control unit.

Preferably, in the testing device provided by the utility model, an emergency stop button is arranged on the mounting plate and used for stopping testing in special conditions.

In summary, the beneficial technical effects of the utility model are as follows: the test device provided by the application comprises a test mechanism; the testing mechanism comprises a power supply, a connecting unit and an acquisition module, wherein the power supply is electrically connected with the input end of the connecting unit, the output end of the connecting unit is used for being electrically connected with the capacitor to be tested, and the acquisition module is used for being connected with the capacitor to be tested; the power supply is used for inputting the output alternating voltage to the connecting unit; the connecting unit is used for regulating the alternating-current voltage into a preset alternating-current voltage, rectifying the preset alternating-current voltage into an adjustable direct-current voltage, and transmitting the direct-current voltage to the capacitor to be tested; the acquisition module is used for acquiring voltage value and/or resistance value signals of the capacitor to be detected; the acquisition module is arranged to monitor the capacitor to be tested in real time, so that compared with the traditional test, errors caused by human factors are reduced, and the test accuracy is improved; meanwhile, the testing efficiency is improved, and the labor intensity of testing personnel is reduced.

Drawings

Fig. 1 is a schematic overall structure diagram of a testing apparatus provided in an embodiment of the present invention.

FIG. 2 is a schematic view of a connection structure between a testing mechanism and a control panel in the testing device of the present invention.

In the figure, 1, test apparatus; 10. a testing mechanism; 11. a power supply; 12. a connection unit; 121. a voltage regulating module; 1211. a voltage regulator; 1212. a rectifier; 1213. a power input interface; 122. a control module; 1221. a first connection terminal; 1222. a second connection terminal; 1223. a third connection terminal; 13. an acquisition module; 14. a control unit; 20. a control panel; 30. a box body; 40. an end cap; 50. mounting a plate; 501. a fourth connection terminal; 502. a ground terminal; 60. a micro printer; 70. a USB interface; 80. an emergency stop button; 90. a control switch; 2. a capacitor to be tested.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, a testing apparatus 1 disclosed in the present invention includes a testing mechanism 10; the testing mechanism 10 comprises a power supply 11, a connecting unit 12 and an acquisition module 13, wherein the power supply 11 is electrically connected with the input end of the connecting unit 12, and the output end of the connecting unit 12 is used for being electrically connected with the capacitor 2 to be tested; the power supply 11 is configured to input the output ac voltage to the connection unit 12; the connection unit 12 is configured to regulate the ac voltage to a preset ac voltage, rectify the preset ac voltage to an adjustable dc voltage, and transmit the dc voltage to the capacitor 2 to be measured.

The acquisition module 13 is used for connecting with the capacitor 2 to be detected, and the acquisition module 13 is used for acquiring voltage value and/or resistance value signals of the capacitor 2 to be detected; by arranging the acquisition module 13, the capacitor 2 to be tested is monitored in real time, and compared with the traditional test, the real-time monitoring method reduces errors caused by human factors and improves the accuracy of the test; meanwhile, the testing efficiency is improved, and the labor intensity of testing personnel is reduced.

Further, in this embodiment, the testing mechanism 10 further includes a control unit 14, and the acquisition module 13 and the connection unit 12 are both in communication connection with the control unit 14; the control unit 14 is used for receiving the voltage value and/or the resistance value signal and issuing a control instruction to the connection unit 12; by arranging the control unit 14, the accurate control of the charging and discharging test voltage values of different types of capacitors by the testing device 1 is realized, and therefore, the testing accuracy is improved.

The testing apparatus 1 provided in this embodiment further includes a control panel 20, the control panel 20 is in communication connection with the control unit 14, so as to implement human-computer interaction between the control panel 20 and the control unit 14, where the human-computer interaction includes: the control panel 20 issues a test function instruction to the control unit 14 and/or the control unit 14 uploads test result data to the control panel 20; by providing the control panel 20, it is thereby facilitated to observe the test results.

Note that the compensation capacity of the capacitor 2 to be measured is in a range of 200kVar or less. The capacitor 2 to be measured may be a three-phase capacitor with a compensation capacity of 200kVar or less, and the capacitor 2 to be measured may also be a single-phase capacitor with a compensation capacity of 200kVar or less, which is not limited in this embodiment.

The range of the preset alternating current voltage is 0-1500V, and the range of the preset direct current voltage is 0-1500V.

Specifically, the power supply 11 is a power frequency power supply, the alternating voltage output by the power supply 11 is a power frequency alternating voltage, and in the using process, the power supply 11 inputs the alternating voltage to the connection unit 12.

In the using process, the control unit 14 analyzes and processes the voltage value and/or the resistance value signal after receiving the voltage value and/or the resistance value signal, and then sends the on-off instruction to the connecting unit 12, so that the accurate control of the charging and discharging test voltage values of the capacitors 2 to be tested in different types is facilitated.

Specifically, the control panel 20 is provided with test functions (the test functions include three types, namely a self-healing single-phase capacitor, an YN type three-phase self-healing parallel capacitor, a delta type/Y type three-phase self-healing parallel capacitor, and the like), wherein the test index and the test repetition number can be manually set according to the test requirements, during the use process, one of the corresponding test functions is manually selected according to the connection mode of the capacitor 2 to be tested and the connection unit 12, and then the control panel 20 issues a test function instruction to the control unit 14. After the test is finished, the control panel 20 displays the test peak voltage, the discharge time, the discharge target voltage and whether the charge-discharge device in the capacitor 2 to be tested is qualified, so that the test accuracy is improved; meanwhile, the testing efficiency is improved.

The using process of the testing device 1 provided by the embodiment is as follows: after the capacitor 2 to be tested is connected with the connecting unit 12, selecting a corresponding test function on the control panel 20 and starting testing; the power supply 11 transmits an alternating current voltage to the connection unit 12, at this time, the control unit 14 issues a voltage transformation instruction to the connection unit 12, the connection unit 12 adjusts the alternating current voltage into a preset alternating current voltage, rectifies the preset alternating current voltage into a direct current voltage, transmits the direct current voltage to the capacitor 2 to be tested, collects a voltage and/or resistance value signal of the capacitor to be tested through the collection module 13, and transmits the voltage and/or resistance value signal to the control unit 14, so that the control unit 14 calculates and controls the charging and discharging test of the capacitor 2 to be tested, after the charging and discharging test is completed, the control unit 14 transmits a test result to the control panel 20, and the control panel 20 displays the test result.

Further, in this embodiment, the connection unit 12 includes a voltage regulation module 121 and a control module 122, an input end of the voltage regulation module 121 is electrically connected to the power supply 11, an output end of the voltage regulation module 121 is electrically connected to an input end of the control module 122, and an output end of the control module 122 is used for electrically connecting to the capacitor 2 to be tested; the voltage regulating module 121 and the control module 122 are both in communication connection with the control unit 14; the voltage regulating module 121 is configured to regulate an ac voltage to a preset ac voltage and rectify the preset ac voltage to an adjustable dc voltage; the control module 122 is configured to control the dc voltage output by the voltage regulating module 121 to adapt to the phase number of the capacitor 2 to be measured.

In the using process, the power supply 11 transmits the alternating voltage to the voltage regulating module 121, at this time, the control unit 14 issues a voltage transformation instruction to the voltage regulating module 121, the control unit 14 regulates the alternating voltage to be a preset alternating voltage, and then rectifies the preset alternating voltage into a direct current voltage, at this time, the control unit 14 issues an on-off instruction to the control module 122 to realize the automatic conversion of the single-phase or three-phase direct current voltage, so that the direct current voltage is adapted to the phase number of the capacitor 2 to be measured.

Further, in this embodiment, the voltage regulating module 121 includes a voltage regulator 1211 and a rectifier 1212, an input end of the voltage regulator 1211 is electrically connected to the power supply 11, an output end of the voltage regulator 1211 is electrically connected to an input end of the rectifier 1212, and an output end of the rectifier 1212 is electrically connected to an input end of the control module 122; the voltage regulator 1211 is in communication connection with the control unit 14; the voltage regulator 1211 is configured to receive a voltage transformation instruction sent by the control unit 14, and transform the ac voltage into a preset ac voltage; the rectifier 1212 is used to rectify a preset ac voltage into an adjustable dc voltage.

In the using process, the control unit 14 issues a transformation instruction to the voltage regulator 1211, the voltage regulator 1211 converts the alternating-current voltage into a preset alternating-current voltage after receiving the transformation instruction, the voltage regulator 1211 transmits the preset alternating-current voltage to the rectifier 1212, the rectifier 1212 rectifies the preset alternating-current voltage into a direct-current voltage, and the rectifier 1212 transmits the direct-current voltage to the measured capacitor through the control module 122.

Further, in this embodiment, the control module 122 includes at least one relay, an input end of the relay is electrically connected to an output end of the rectifier 1212, and an output end of the relay is used to be electrically connected to the capacitor 2 to be tested, so that the dc voltage output by the rectifier 1212 matches with the number of phases of the capacitor 2 to be tested through on/off of the relay.

The control module 122 may include a plurality of relays, input ends of the plurality of relays are electrically connected to an output end of the rectifier 1212, in the using process, the control unit 14 issues an on-off instruction to the control module 122 to control on/off of each relay, and the on/off control of each relay controls the dc voltage (i.e., single-phase or three-phase dc voltage) output by the rectifier 1212, so that the dc voltage is adapted to the phase number of the capacitor 2 to be tested, thereby improving the testing efficiency and shortening the testing time.

With reference to fig. 1, the testing apparatus 1 provided in this embodiment further includes a box body 30, an end cover 40, and a mounting plate 50, where the box body 30 is enclosed into an accommodating cavity, the mounting plate 50 is inserted into the accommodating cavity, the testing mechanism 10 is accommodated in the accommodating cavity and located at the bottom of the mounting plate 50, the input end of the connection unit 12 and the output end of the connection unit 12 are both inserted into the mounting plate 50, and the control panel 20 is disposed on the top surface of the mounting plate 50; the end cover 40 is used for covering the top end of the accommodating cavity, the end cover 40 is connected with the box body 30 through a rotating shaft, and the end cover 40 can rotate relative to the box body 30; on one hand, the end cover 40 can rotate relative to the box body 30, so that the opening and closing of the end cover 40 are facilitated; on the other hand, by providing the case 30, the test apparatus 1 can be easily transported, and the portability of the test apparatus 1 can be improved. Specifically, the mounting plate 50 is parallel to the horizontal plane, the input end (i.e., the power input interface 1213) of the voltage regulator 1211 is inserted into the mounting plate 50, and the power supply 11 is connected to the power input interface 1213 via a power line during use.

The rotation shaft extends along the length direction of the mounting plate 50, and the end cover 40 rotates with the central axis of the rotation shaft as an axis to open and close the end cover 40.

Illustratively, both the case 30 and the end cap 40 are made of aluminum alloy; of course, both the housing 30 and the end cap 40 may be made of non-metallic materials.

In an implementation where the control module 122 includes three relays, the three relays are a first relay, a second relay, and a third relay, where an output of the first relay is the first connection terminal 1221, an output of the second relay is the second connection terminal 1222, and an output of the third relay is the third connection terminal 1223.

Specifically, first binding post 1221, second binding post 1222 and third binding post 1223 set up along mounting panel 50's width direction interval, and first binding post 1221, second binding post 1222 and third binding post 1223 all insert locate on mounting panel 50, and extend to the outside of mounting panel 50, from this, are convenient for be connected with the condenser 2 that awaits measuring.

When the capacitor 2 to be measured is a three-phase capacitor, the first connection terminal 1221, the second connection terminal 1222, and the third connection terminal 1223 are respectively connected to the a connection terminal, the B connection terminal, and the C connection terminal of the capacitor 2 to be measured.

The mounting board 50 is provided with a fourth connection terminal 501, and in the use process, the fourth connection terminal 501 is used for being connected with an N connection terminal (i.e. a zero line terminal) of the capacitor 2 to be tested. The fourth connection terminal 501 is located on a side of the third connection terminal 1223 away from the second connection terminal 1222, and the fourth connection terminal 501 and the third connection terminal 1223 are spaced apart along the width direction of the mounting board 50.

When the capacitor 2 to be measured is a single-phase capacitor, the a connection terminal of the capacitor 2 to be measured is used for being connected with the first connection terminal 1221, after the rectifier 1212 rectifies a preset alternating-current voltage into a direct-current voltage, the control unit 14 issues an on-off instruction to the control module 122, after the control module 122 receives the on-off instruction, the first relay is connected, the second relay and the third relay are both disconnected, and the direct-current voltage is input into the capacitor 2 to be measured through the first relay, so that the charging process of the capacitor 2 to be measured is achieved.

The mounting plate 50 is provided with a ground terminal 502 for connection to a ground grid. The ground terminal 502 is located on a side of the fourth connection terminal 501 away from the third connection terminal 1223, and the connection terminal and the fourth connection terminal 501 are spaced apart from each other along the width direction of the mounting board 50.

Further, the testing device 1 provided by the present embodiment further includes a micro printer 60, the micro printer 60 is disposed on the mounting plate 50, and the micro printer 60 is configured to print the measurement result data.

In the present embodiment, a control switch 90 is disposed on the mounting plate 50, and the control switch 90 is used for controlling the testing mechanism 10. After the capacitor 2 to be tested is connected with the control module 122, the control switch 90 is clicked, a test function is selected on the control panel 20 according to the connection mode of the capacitor 2 to be tested and the control module 122, then the control panel 20 sends a test function instruction to the control unit 14, and then the test device 1 starts to test the capacitor 2 to be tested.

Further, in the present embodiment, the mounting plate 50 is provided with a USB interface 70, and the external device is connected to the control unit 14 through the USB interface 70 to update the program of the control unit 14; by providing the USB interface 70, updating of data of the control unit 14 is thereby facilitated.

Specifically, the control switch 90 is located between the power input interface 1213 and the USB interface 70, and the power input interface 1213, the control switch 90 and the USB interface 70 are disposed at intervals along the length direction of the mounting plate 50.

In the embodiment, the mounting plate 50 is provided with an emergency stop button 80, and the emergency stop button 80 is used for stopping the test under special conditions; by providing the emergency stop button 80, the safety of the testing device 1 is thereby improved.

Specifically, the scram button 80 is located on a side of the USB interface 70 away from the control switch 90.

The using process of the testing device 1 provided by the embodiment is as follows: after the capacitor 2 to be tested is connected with the control module 122, the control switch 90 is clicked, test indexes and test repetition times are set on the control panel 20 according to test standards, corresponding test functions are selected on the control panel 20 according to the connection mode of the capacitor 2 to be tested and the connection unit 12, and then the control panel 20 sends a test function instruction to the control unit 14 to set up a test; the power supply 11 transmits the output ac voltage to the voltage regulator 1211, at this time, the control unit 14 issues a voltage transformation instruction to the voltage regulator 1211, and the voltage regulator 1211 transforms the ac voltage into a preset ac voltage after receiving the voltage transformation instruction; then, the voltage regulator 1211 transmits the preset alternating voltage to the rectifier 1212, and the rectifier 1212 rectifies the preset alternating voltage into an adjustable direct voltage; then, the rectifier 1212 transmits the dc voltage to the control module 122, and at the same time, the control unit 14 issues an on-off instruction to the control module 122, so that the number of phases of the dc voltage matches the number of phases of the capacitor 2 to be tested (that is, automatic conversion of single-phase or three-phase dc voltage is achieved) through on-off of each relay in the control module 122, the dc voltage is input into the capacitor 2 to be tested through the control module 122, and at the same time, the acquisition module 13 acquires a voltage value and/or a resistance value signal of the capacitor 2 to be tested, and transmits the acquired voltage value and/or resistance value signal to the control unit 14, and the control unit 14 analyzes and calculates the received voltage value and/or resistance value signal to further control the charge and discharge test of the capacitor 2 to be tested; after the capacitor 2 to be tested is tested, the control unit 14 transmits the test result to the control panel 20, the control panel 20 displays the test structure, and the test result is printed out by the micro printer 60.

The test device 1 provided by the application comprises a test mechanism 10; the testing mechanism 10 comprises a power supply 11, a connecting unit 12 and an acquisition module 13, wherein the power supply 11 is electrically connected with the input end of the connecting unit 12, the output end of the connecting unit 12 is used for being electrically connected with the capacitor 2 to be tested, and the acquisition module 13 is used for being connected with the capacitor 2 to be tested; the power supply 11 is configured to input the output ac voltage to the connection unit 12; the connecting unit 12 is configured to regulate the ac voltage to a preset ac voltage, rectify the preset ac voltage to an adjustable dc voltage, and transmit the dc voltage to the capacitor 2 to be measured; the acquisition module 13 is used for acquiring voltage value and/or resistance value signals of the capacitor 2 to be measured; by arranging the acquisition module 13, the capacitor 2 to be tested is monitored in real time, and compared with the traditional test, the real-time monitoring method reduces errors caused by human factors and improves the accuracy of the test; meanwhile, the testing efficiency is improved, and the labor intensity of testing personnel is reduced.

The testing device 1 provided by the utility model has the following advantages: the device has simple structure, easy manufacture and convenient operation.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Finally, it should be noted that: it should be understood that the above examples are only for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious variations or modifications are intended to be within the scope of the present invention.

Claims (10)

1. A test apparatus, characterized by: comprises a testing mechanism;

the testing mechanism comprises a power supply, a connecting unit and an acquisition module, wherein the power supply is electrically connected with the input end of the connecting unit, the output end of the connecting unit is used for being electrically connected with a capacitor to be tested, and the acquisition module is used for being connected with the capacitor to be tested;

the power supply is used for inputting the output alternating voltage to the connecting unit;

the connecting unit is used for regulating the alternating-current voltage into a preset alternating-current voltage, rectifying the preset alternating-current voltage into an adjustable direct-current voltage, and transmitting the direct-current voltage to the capacitor to be tested;

the acquisition module is used for acquiring voltage value and/or resistance value signals of the capacitor to be detected.

2. The test device of claim 1, wherein: the connecting unit comprises a voltage regulating module and a control module, the input end of the voltage regulating module is electrically connected with the power supply, the output end of the voltage regulating module is electrically connected with the input end of the control module, and the output end of the control module is used for being electrically connected with the capacitor to be tested;

the voltage regulating module is used for regulating the alternating voltage into the preset alternating voltage and rectifying the preset alternating voltage into adjustable direct voltage;

the control module is used for controlling the direct-current voltage output by the voltage regulating module to be matched with the phase number of the capacitor to be tested.

3. The test device of claim 2, wherein: the voltage regulating module comprises a voltage regulator and a rectifier, the input end of the voltage regulator is electrically connected with the power supply, the output end of the voltage regulator is electrically connected with the input end of the rectifier, and the output end of the rectifier is electrically connected with the input end of the control module;

the voltage regulator is used for converting the alternating voltage into the preset alternating voltage;

the rectifier is used for rectifying the preset alternating current voltage into the adjustable direct current voltage.

4. The test device of claim 3, wherein: the control module comprises at least one relay, the input end of the relay is electrically connected with the output end of the rectifier, the output end of the relay is used for being electrically connected with the capacitor to be tested, and the direct-current voltage output by the rectifier is matched with the phase number of the capacitor to be tested through the on-off of the relay.

5. The test device of claim 1, wherein: the test mechanism also comprises a control unit, and the acquisition module and the connection unit are both in communication connection with the control unit;

and the control unit is used for receiving the voltage value and/or resistance value signal and issuing a control instruction to the connecting unit.

6. The test device of claim 5, wherein: still include control panel, control panel with the control unit communication connection, in order to realize control panel with human-computer interaction between the control unit, human-computer interaction includes: the control panel issues a test function instruction to the control unit and/or the control unit uploads test result data to the control panel.

7. The test device of claim 6, wherein: the testing device comprises a box body, an end cover and a mounting plate, wherein the box body is enclosed into an accommodating cavity, the mounting plate is inserted into the accommodating cavity, the testing mechanism is accommodated in the accommodating cavity and positioned at the bottom of the mounting plate, the input end of the connecting unit and the output end of the connecting unit are inserted into the mounting plate, and the control panel is arranged on the top surface of the mounting plate;

the end cover is used for covering the top end of the containing cavity, is connected with the box body through a rotating shaft and can rotate relative to the box body.

8. The test device of claim 7, wherein: still include micro printer, micro printer set up in on the mounting panel, micro printer is used for printing measurement result data.

9. The test device of claim 8, wherein: the mounting plate is provided with a USB interface, and external equipment is connected with the control unit through the USB interface so as to update the program of the control unit.

10. The test device of claim 9, wherein: an emergency stop button is arranged on the mounting plate and used for stopping testing.

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