CN220381235U - Single-power insulating material direct-current durability test device - Google Patents
Single-power insulating material direct-current durability test device Download PDFInfo
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- CN220381235U CN220381235U CN202321903744.5U CN202321903744U CN220381235U CN 220381235 U CN220381235 U CN 220381235U CN 202321903744 U CN202321903744 U CN 202321903744U CN 220381235 U CN220381235 U CN 220381235U
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- 239000011810 insulating material Substances 0.000 title claims abstract description 70
- 239000003990 capacitor Substances 0.000 claims abstract description 19
- 239000012774 insulation material Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a single-power-supply insulating material direct-current durability test device, which relates to the technical field of direct-current withstand voltage tests and comprises a high-voltage direct-current power supply and a plurality of parallel sample branches, wherein each sample branch comprises a current limiting resistor, a capacitor, a fuse wire and an insulating material sample, the negative electrode of the high-voltage direct-current power supply is grounded, the positive electrode of the high-voltage direct-current power supply is connected with one end of the current limiting resistor, the fuse wire 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, and the other end of the capacitor and the other end of the insulating material sample branch are grounded. The technical problem of low efficiency of the DC durability test of the insulating material is solved.
Description
Technical Field
The utility model relates to the technical field of direct-current withstand voltage tests, in particular to a single-power insulating material direct-current durability 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. In the current system for performing the direct current durability test, one high-voltage direct current power supply can only perform the durability test of one insulating material sample, and the efficiency is low.
Disclosure of Invention
The utility model provides a single-power-supply insulating material direct-current durability test device which is used for improving the insulating material direct-current durability test efficiency.
In view of the above, the present utility model provides a single power insulation material dc durability test apparatus, comprising: a high voltage DC power supply and a plurality of parallel sample branches;
the sample branch comprises a current limiting resistor, a capacitor, a fuse and an insulating material sample, wherein the negative electrode of the high-voltage direct-current power supply is grounded, the positive electrode 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, and the other end of the capacitor and the other end of the insulating material sample branch are grounded.
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.
Optionally, the sample branch further comprises a discharge switch and a discharge resistor;
one end of the discharge switch is connected with the other end of the current-limiting resistor, the other end of the discharge switch is connected with one end of the discharge resistor, and the other end of the discharge resistor is grounded.
According to the technical scheme, the single-power insulating material direct-current durability test device provided by the utility model has the following advantages:
the utility model provides a single-power-supply insulating material direct-current durability test device which comprises a high-voltage direct-current power supply and a plurality of parallel sample branches, wherein each sample branch comprises a current limiting resistor, a capacitor, a fuse wire and an insulating material sample, the negative electrode of the high-voltage direct-current power supply is grounded, the positive electrode of the high-voltage direct-current power supply is connected with one end of the current limiting resistor, the fuse wire 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, and the other end of the capacitor and the other end of the insulating material sample branch are grounded. When the durability test is carried out on the insulating material samples, a high-voltage direct-current power supply is connected, and meanwhile, the insulating material samples of a plurality of parallel connection sample branches are charged, so that the two ends of the insulating material samples reach test voltage. Therefore, the single-power-supply insulating material direct-current durability test device provided by the utility model can simultaneously carry out durability tests on a plurality of insulating material samples, and improves the efficiency of the insulating material direct-current durability test.
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 DC durability test device for a single power supply insulating material provided by the utility model;
FIG. 2 is another schematic circuit diagram of a DC durability test apparatus for a single power supply insulating material according to the present utility model;
wherein, the reference numerals are as follows:
DC. High voltage dc voltage; s, a main switch; r, a current limiting resistor; rs, discharge resistance; FU, fuse; C. a capacitor; SP, insulating material test; K. and a discharge 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 dc durability test apparatus for a single power supply insulating material is provided in the present utility model, including: a high voltage direct current power supply DC and a plurality of parallel sample branches;
the sample branch circuit comprises a current limiting resistor R, a capacitor C, a fuse FU and an insulating material sample SP, wherein the negative electrode of a high-voltage direct-current power supply DC is grounded, the positive electrode of the high-voltage direct-current power supply DC is connected with one end of the current limiting resistor R, the fuse FU and the insulating material sample SP are connected in series to form an insulating material sample branch, the other end of the current limiting resistor R is respectively connected with one end of the capacitor C and one end of the insulating material sample branch, and the other end of the capacitor C and the other end of the insulating material sample branch are grounded.
In the embodiment of the utility model, the single-power-supply insulating material DC durability test device is composed of a high-voltage DC power supply DC and more than two parallel sample branches, and in each sample branch, an insulating material sample SP and a fuse FU are connected in series and then connected in parallel with a capacitor C, and then connected in series with a current limiting resistor R as a whole. When the durability test is carried out on the insulating material sample, a high-voltage direct current power supply DC is connected, the high-voltage direct current power supply DC simultaneously charges the insulating material samples SP of a plurality of parallel connection sample branches, so that the two ends of the insulating material samples SP reach the test voltage, if in the test process, a certain insulating material sample SP breaks down, a capacitor C of the sample branch where the insulating material sample SP breaks down discharges through the fuse FU, so that the fuse FU fuses, the broken insulating material sample SP exits from circuit connection, and the durability test of the insulating material samples SP of other sample branches is not affected. By the fusing state of the fuse FU, it is possible to determine which insulating material samples SP have broken down in the test. Therefore, the single-power-supply insulating material direct-current durability test device provided by the utility model can simultaneously carry out durability tests on a plurality of insulating material samples, and improves the efficiency of the insulating material direct-current durability test.
In one embodiment, as shown in fig. 2, the single-power insulating material DC durability test apparatus may further be provided with a main switch S, where one end of the main switch S is connected to the positive pole of the high-voltage DC power supply DC, and the other end is connected to a plurality of parallel sample branches. The main switch S is used for controlling the connection and disconnection of the high-voltage direct-current power supply DC. The sample branch can also be provided with a branch switch (not shown in the figure), one end of the branch switch is connected with the other end of the current-limiting resistor R, and the other end of the branch switch is connected with 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 circuit 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 R, 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 single power insulating material direct current durability test device is characterized by comprising: a high voltage DC power supply and a plurality of parallel sample branches;
the sample branch comprises a current limiting resistor, a capacitor, a fuse and an insulating material sample, wherein the negative electrode of the high-voltage direct-current power supply is grounded, the positive electrode 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, and the other end of the capacitor and the other end of the insulating material sample branch are grounded.
2. The single power supply insulating material direct current durability test device 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.
3. The single power supply insulating material dc durability test apparatus according to claim 1 or 2, wherein the sample branch further comprises a branching 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.
4. The single power insulation material dc durability test apparatus according to claim 3 wherein the sample branch further comprises a discharge switch and a discharge resistor;
one end of the discharge switch is connected with the other end of the current-limiting resistor, the other end of the discharge switch is connected with one end of the discharge resistor, and the other end of the discharge resistor is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321903744.5U CN220381235U (en) | 2023-07-19 | 2023-07-19 | Single-power insulating material direct-current durability test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321903744.5U CN220381235U (en) | 2023-07-19 | 2023-07-19 | Single-power insulating material direct-current durability test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220381235U true CN220381235U (en) | 2024-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321903744.5U Active CN220381235U (en) | 2023-07-19 | 2023-07-19 | Single-power insulating material direct-current durability test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220381235U (en) |
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2023
- 2023-07-19 CN CN202321903744.5U patent/CN220381235U/en active Active
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