CN220584332U - Direct current durability parallel full-automatic test device - Google Patents

Abstract

The utility model discloses a direct current durability parallel full-automatic test device, which is characterized in that when a durability test is carried out on an insulating material sample, a high-voltage direct current power supply is connected, so that the two ends of the insulating material sample reach test voltage, if a certain insulating material sample breaks down in the test process, a fuse link fuses, so that the broken insulating material sample exits from circuit connection, meanwhile, a potential indicator corresponding to a broken sample branch is used for outputting a low potential signal and transmitting the low potential signal to a signal selector, and the signal selector is used for outputting a corresponding sample branch serial number to a controller, so that the controller is used for outputting a control signal to regulate the voltage output of the high-voltage direct current power supply. The method solves the technical problems that the existing direct current durability test needs to manually control the test power supply voltage, or can only finish voltage application according to the set time sequence, and can not automatically finish the change of the test voltage according to the tolerance condition of each test article in the test process, and the efficiency is low.

Description

Direct current durability parallel full-automatic test device

Technical Field

The utility model relates to the technical field of direct current withstand voltage tests, in particular to a direct current durability parallel full-automatic test device.

Background

Durability under dc voltage is an important parameter of insulating materials, and is usually detected by a dc withstand voltage test. The direct current withstand voltage test is a test performed on an insulating material under direct current high voltage, and the basic principle is that the direct current high voltage is applied to the insulating surface of an insulating material sample to form electric field intensity in an insulating gap, and then whether the insulating material sample has breakdown phenomenon is observed.

At present, when a direct current durability test is carried out, the test power supply voltage needs to be controlled manually, or voltage application can only be completed according to a set time sequence, and the change of the test voltage can not be completed automatically according to the tolerance condition of each test article in the test process, so that the efficiency is low.

Disclosure of Invention

The utility model provides a direct-current durability parallel full-automatic test device which is used for solving the technical problems that the conventional direct-current durability test needs to manually control test power supply voltage, or voltage application can only be completed according to a set time sequence, and the change of test voltage can not be automatically completed according to the tolerance condition of each test article in the test process, so that the efficiency is low.

In view of this, the present utility model provides a full-automatic test device for parallel connection of dc durability, comprising: the device comprises a high-voltage direct-current power supply, a signal selector, a controller and a plurality of parallel sample branches;

the sample branch circuit comprises a current limiting resistor, a capacitor, a fuse, an insulating material sample and a potential indicator, wherein one end of a high-voltage direct current power supply is grounded, the other end of the high-voltage direct current power supply is connected with one end of the current limiting resistor, the fuse and the insulating material sample are connected in series to form an insulating material sample branch, the other end of the current limiting resistor is respectively connected with one end of the capacitor and one end of the insulating material sample branch, the other end of the capacitor and the other end of the insulating material sample branch are grounded, the input end of the potential indicator is connected between the fuse and the insulating material sample, the output end of the potential indicator is connected with the input end of a signal selector, the output end of the signal selector is connected with a controller, and the controller is connected with the high-voltage direct current power supply.

Optionally, the potential indicator is a photoelectric converter.

Optionally, the device further comprises a main switch;

one end of the main switch is connected with the positive pole of the high-voltage direct-current power supply, and the other end of the main switch is connected with a plurality of parallel sample branches.

Optionally, the sample branch further comprises a branch switch;

one end of the branch switch is connected with the other end of the current-limiting resistor, and the other end of the branch switch is connected with one end of the insulating material sample branch.

From the above technical scheme, the direct current durability parallel full-automatic test device provided by the utility model has the following advantages:

the utility model provides a direct current durability parallel full-automatic test device, which comprises: the device comprises a high-voltage direct-current power supply, a signal selector, a controller and a plurality of parallel sample branches; the sample branch circuit comprises a current limiting resistor, a capacitor, a fuse, an insulating material sample and a potential indicator, wherein one end of a high-voltage direct current power supply is grounded, the other end of the high-voltage direct current power supply is connected with one end of the current limiting resistor, the fuse and the insulating material sample are connected in series to form an insulating material sample branch, the other end of the current limiting resistor is respectively connected with one end of the capacitor and one end of the insulating material sample branch, the other end of the capacitor and the other end of the insulating material sample branch are grounded, the input end of the potential indicator is connected between the fuse and the insulating material sample, the output end of the potential indicator is connected with the input end of a signal selector, the output end of the signal selector is connected with a controller, and the controller is connected with the high-voltage direct current power supply. When the durability test is carried out on the insulating material samples, a high-voltage direct current power supply is connected, meanwhile, the insulating material samples of a plurality of parallel sample branches are charged, so that test voltages are achieved at two ends of the insulating material samples, if a certain insulating material sample breaks down in the test process, a capacitor of the sample branch where the insulating material sample breaks down is discharged through a fuse, the fuse is fused, the broken insulating material sample is led to exit from circuit connection, meanwhile, a potential indicator corresponding to the broken sample branch outputs a low-potential signal and is transmitted to a signal selector, and the signal selector outputs a corresponding sample branch serial number to a controller, so that the controller outputs a control signal to adjust voltage output of the high-voltage direct current power supply. The method solves the technical problems that the existing direct current durability test needs to manually control the test power supply voltage, or can only finish voltage application according to the set time sequence, and can not automatically finish the change of the test voltage according to the tolerance condition of each test article in the test process, and the efficiency is low.

Drawings

For a clearer description of embodiments of the utility model or of solutions according to the prior art, the figures which are used in the description of the embodiments or of the prior art will be briefly described, it being obvious that the figures in the description below are only some embodiments of the utility model, from which, without the aid of inventive efforts, other relevant figures can be obtained for a person skilled in the art.

FIG. 1 is a schematic circuit diagram of a full-automatic test device for DC durability parallel connection provided by the utility model;

FIG. 2 is another schematic circuit diagram of a full-automatic test device for DC durability parallel connection provided in the present utility model;

wherein, the reference numerals are as follows:

1. high voltage dc voltage; 2. a sample branch; 21. a current limiting resistor; 22. a fuse; 23. an insulating material sample; 24. a capacitor; 25. a potential indicator; 3. a signal selector; 4. a controller; 5. and a main switch.

Detailed Description

In order to make the present utility model better understood by those skilled in the art, the following description will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

For ease of understanding, referring to fig. 1, an embodiment of a full-automatic test apparatus for parallel connection of dc durability is provided in the present utility model, including: a high-voltage direct current power supply 1, a signal selector 3, a controller 4 and a plurality of parallel sample branches 2;

the sample branch 2 comprises a current limiting resistor 21, a capacitor 24, a fuse 22, an insulating material sample 23 and a potential indicator 25, one end of the high-voltage direct current power supply 1 is grounded, the other end of the high-voltage direct current power supply 1 is connected with one end of the current limiting resistor 21, the fuse 22 and the insulating material sample 23 are connected in series to form an insulating material sample branch, the other end of the current limiting resistor 21 is respectively connected with one end of the capacitor 24 and one end of the insulating material sample branch, the other end of the capacitor 24 and the other end of the insulating material sample branch are grounded, the input end of the potential indicator 25 is connected between the fuse 22 and the insulating material sample 23, the output end of the potential indicator 25 is connected with the input end of the signal selector 3, the output end of the signal selector 3 is connected with the controller 4, and the controller 4 is connected with the high-voltage direct current power supply 1.

In the embodiment of the present utility model, the full-automatic test device for parallel connection of dc durability is composed of a high-voltage dc power supply 1 and two or more parallel connection sample branches 2, and in each sample branch 2, an insulating material sample 23 is connected in series with a fuse 22, then connected in parallel with a capacitor 24, and then connected in series with a current limiting resistor 21 as a whole. When the durability test is carried out on the insulating material samples 23, the high-voltage direct current power supply 1 is connected, the high-voltage direct current power supply 1 simultaneously charges the insulating material samples 23 of the plurality of parallel connection sample branches 2, so that the two ends of each insulating material sample 23 reach the test voltage, if a certain insulating material sample 23 breaks down in the test process, the capacitor 24 of the sample branch 2 where the insulating material sample 23 breaks down discharges through the fuse 22, so that the fuse 22 is fused, the broken insulating material sample 23 exits from the circuit connection, and the durability test of the insulating material samples 23 of other sample branches 2 is not affected. By the fusing state of the fuse 22, it is possible to determine which insulating material samples 23 have broken down in the test. Therefore, the direct current durability parallel full-automatic test device provided by the utility model can simultaneously carry out the durability test of a plurality of insulating material samples 23, and improves the efficiency of the insulating material direct current durability test. Meanwhile, when the insulating material sample 23 breaks down, the potential indicator 25 corresponding to the broken down sample branch 2 outputs a low potential signal to the signal selector 3, and the signal selector 3 outputs a corresponding sample branch serial number to the controller 4, so that the controller 4 outputs a control signal to adjust the voltage output of the high-voltage direct-current power supply 1, and the technical problems that the conventional direct-current durability test needs to manually control the test power supply voltage, or the voltage application can only be completed according to the set time sequence, the change of the test voltage can not be automatically completed according to the tolerance condition of each sample in the test process, and the efficiency is low are solved. The high-voltage direct current power supply 1 can be a positive high-voltage direct current power supply or a negative high-voltage direct current power supply, when the positive high-voltage direct current power supply is adopted, the negative electrode of the high-voltage direct current power supply 1 is grounded, and when the negative high-voltage direct current power supply is adopted, the positive electrode of the high-voltage direct current power supply 1 is grounded. The potential indicator 25 is preferably a photoelectric converter.

In one embodiment, as shown in fig. 2, the full-automatic parallel test device for dc durability may further be provided with a master switch 5, where one end of the master switch 5 is connected to the high-voltage output end of the high-voltage dc power supply 1, and the other end is connected to a plurality of parallel sample branches 2. The main switch 5 is used for controlling the connection and disconnection of the high-voltage direct-current power supply 1. The sample branch 2 may further be provided with a branch switch (not shown in the figure), one end of the branch switch is connected to the other end of the current limiting resistor 21, and the other end of the branch switch is connected to one end of the insulating material sample branch. The branch switch is used for controlling the connection and disconnection of the insulating material sample branch. The sample branch 2 can be further provided with a discharge switch K and a discharge resistor Rs, one end of the discharge switch K is connected with the other end of the current-limiting resistor 21, the other end of the discharge switch K is connected with one end of the discharge resistor Rs, and the other end of the discharge resistor Rs is grounded. The discharge switch K and the discharge resistor Rs can be used for discharge processing of the remaining capacity of the capacitor C.

The above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (4)

1. A full-automatic test device of parallelly connected direct current durability is characterized in that includes: the device comprises a high-voltage direct-current power supply, a signal selector, a controller and a plurality of parallel sample branches;

the sample branch circuit comprises a current limiting resistor, a capacitor, a fuse, an insulating material sample and a potential indicator, wherein one end of a high-voltage direct current power supply is grounded, the other end of the high-voltage direct current power supply is connected with one end of the current limiting resistor, the fuse and the insulating material sample are connected in series to form an insulating material sample branch, the other end of the current limiting resistor is respectively connected with one end of the capacitor and one end of the insulating material sample branch, the other end of the capacitor and the other end of the insulating material sample branch are grounded, the input end of the potential indicator is connected between the fuse and the insulating material sample, the output end of the potential indicator is connected with the input end of a signal selector, the output end of the signal selector is connected with a controller, and the controller is connected with the high-voltage direct current power supply.

2. The full-automatic test device for parallel connection of direct current durability according to claim 1, wherein the potential indicator is a photoelectric converter.

3. The full-automatic test device for parallel connection of direct current durability according to claim 1, further comprising a main switch;

one end of the main switch is connected with the positive pole of the high-voltage direct-current power supply, and the other end of the main switch is connected with a plurality of parallel sample branches.

4. A full-automatic test apparatus for parallel connection of dc durability according to claim 1 or 3, wherein the sample branch further comprises a branch switch;

one end of the branch switch is connected with the other end of the current-limiting resistor, and the other end of the branch switch is connected with one end of the insulating material sample branch.