A test system for multiple boost interfaces of power frequency withstand voltage equipment

Abstract

The present invention relates to a power frequency withstand voltage equipment multi-boost interface lead-out test system, comprising a test hall, wherein the hall space of the test hall is provided with an isolating switch, an inner sleeve, a first three-station isolating grounding switch and test equipment, and the hall space outside the test hall is provided with an outer sleeve, a second three-station isolating grounding switch and a third three-station isolating grounding switch, and the test equipment comprises a gas power frequency test transformer and a lightning impulse device; the gas power frequency test transformer, the isolating switch and the third three-station isolating grounding switch are connected through a tube bus, and a port-to-port bus interface is also connected at the end of the tube bus, and a first circuit and a second circuit are also connected in parallel on the tube bus, and the first three-station isolating grounding switch and the inner sleeve are sequentially connected on the first circuit, and the second three-station isolating grounding switch and the outer sleeve are sequentially connected on the second circuit. The test system of the present invention can realize two test stations inside and outside the test hall, and the test station outside the hall is not limited by the height and area of ​​the test hall, and is suitable for more products.

Description

Technical Field

[0001] The invention relates to the field of power frequency withstand voltage test, in particular to a power frequency withstand voltage equipment multi-boosting interface lead-out test system. Background Art

[0002] The power frequency withstand voltage test is used to test the insulation strength of various electrical products, electrical components, insulating materials, etc. under a specified voltage to assess the insulation level of the product, find insulation defects of the tested product, and measure the overvoltage capability. The power frequency withstand voltage test is widely used in electrical manufacturing departments, power operation departments, scientific research institutions and colleges and universities.

[0003] At present, in the process of producing isolating switches or circuit breakers, it is also necessary to conduct power frequency withstand voltage test. When existing manufacturers conduct power frequency withstand voltage test, they all need to move the isolating switches or circuit breakers to be tested to a dedicated test hall for testing. However, the height and size of the general test hall are fixed, and for the manufacturers of isolating switches and circuit breakers, due to the consideration of the use scenarios, current and voltage of isolating switches or circuit breakers, the sizes of isolating switches and circuit breakers are various, and there are even some super-large isolating switches or circuit breakers. When conducting withstand voltage test on these super-large isolating switches or circuit breakers, due to the height and size restrictions of the test hall, the safety distance requirements are not met when conducting withstand voltage test on these super-large samples, and the test cannot be conducted. In addition, due to the limitation of the floor space, the manufacturer cannot expand the test hall indefinitely. In addition, when conducting tests in the test hall, there is only one test station in the same test hall, that is, only one sample can be tested at the same time, and the test efficiency is low. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a multi-boosting interface lead-out test system for power frequency withstand voltage equipment.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: a power frequency withstand voltage equipment multi-boost interface lead-out test system, the innovation of which is: including

[0006] A test hall, wherein the space inside the test hall is provided with an isolating switch, an inner bushing, a first three-station isolating and grounding switch and test equipment, and the space outside the test hall is provided with an outer bushing, a second three-station isolating and grounding switch and a third three-station isolating and grounding switch, and the test equipment includes a gas power frequency test transformer and a lightning impulse device;

[0007] The gas power frequency test transformer, the isolating switch and the third three-station isolating and grounding switch are connected through a tube busbar, and a mouth-to-mouth busbar interface is also connected to the end of the tube busbar located on the side of the space outside the hall. A first circuit located in the space inside the hall and a second circuit located in the space outside the hall are also connected in parallel on the tube busbar between the isolating switch and the third three-station isolating and grounding switch. The first circuit is connected in sequence with the first three-station isolating and grounding switch and the inner bushing, and the second circuit is connected in sequence with the second three-station isolating and grounding switch and the outer bushing. The test product to be tested is connected to the inner bushing, the outer bushing or the mouth-to-mouth busbar interface, and the lightning impulse device is connected to the inner bushing.

[0008] Furthermore, the space inside the test hall and the space outside the hall are separated by a shielding wall.

[0009] Furthermore, the test method of the power frequency withstand voltage equipment multi-boost interface lead-out test system includes the following steps:

[0010] S1: First, according to the specifications of the test product to be tested and the test content, select the test site. If it is necessary to perform a power frequency withstand voltage test in the hall space, proceed to step S2. If it is necessary to perform a power frequency withstand voltage test in the hall space outside, proceed to step S3. If it is necessary to perform a lightning impulse voltage test in the hall space outside, proceed to step S6;

[0011] S2: The test equipment uses a gas power frequency test transformer, the test equipment is connected to the tube bus, the test product to be tested is connected to the inner bushing, the isolating switch is closed, the isolating switch in the first three-station isolating and grounding switch is closed, the grounding switch in the first three-station isolating and grounding switch is opened, the isolating switch in the second three-station isolating and grounding switch is opened, the grounding switch in the second three-station isolating and grounding switch is closed, the isolating switch in the third three-station isolating and grounding switch is opened, and the grounding switch in the third three-station isolating and grounding switch is closed. At this time, the inner bushing is energized, and a high-voltage line is led from the inner bushing to perform a power frequency withstand voltage test on the test product to be tested;

[0012] S3: Determine whether the test product to be tested needs to undergo a separate busbar test. If not, proceed to step S4. If necessary, proceed to step S5.

[0013] S4: The test equipment uses a gas power frequency test transformer, the test equipment is connected to the tube bus, the test product to be tested is connected to the outer casing, the isolating switch is closed, the isolating switch in the first three-station isolating and grounding switch is opened, the grounding switch in the first three-station isolating and grounding switch is closed, the isolating switch in the second three-station isolating and grounding switch is closed, the grounding switch in the second three-station isolating and grounding switch is opened, the isolating switch in the third three-station isolating and grounding switch is opened, and the grounding switch in the third three-station isolating and grounding switch is closed. At this time, the outer casing is energized, and a high-voltage line is led from the outer casing to perform a power frequency withstand voltage test on the test product to be tested;

[0014] S5: The test equipment uses a gas power frequency test transformer, the test equipment is connected to the tube bus, the test product to be tested is connected to the port-to-port bus interface, the isolating switch is closed, the isolating switch in the first three-station isolating grounding switch is opened, the grounding switch in the first three-station isolating grounding switch is closed, the isolating switch in the second three-station isolating grounding switch is opened, the grounding switch in the second three-station isolating grounding switch is closed, the isolating switch in the third three-station isolating grounding switch is closed, and the grounding switch in the third three-station isolating grounding switch is opened. At this time, the port-to-port bus interface is energized, and the power frequency withstand voltage test is performed on the test product to be tested;

[0015] S6: The test equipment is a lightning impulse device, which is connected to the inner bushing, and the test product to be tested is connected to the outer bushing. The isolating switch is opened, the isolating switch in the first three-station isolating and grounding switch is closed, the grounding switch in the first three-station isolating and grounding switch is opened, the isolating switch in the second three-station isolating and grounding switch is closed, the grounding switch in the second three-station isolating and grounding switch is opened, the isolating switch in the third three-station isolating and grounding switch is opened, and the grounding switch in the third three-station isolating and grounding switch is closed. At this time, the lightning impulse device leads the voltage from the inner bushing to the outer bushing to perform a lightning impulse electric shock test on the test product to be tested.

[0016] The advantages of the present invention are as follows: the test system of the present invention can realize two test stations inside and outside the test hall through the cooperation of multiple three-station isolating grounding switches and inner and outer sleeves and port-to-port busbar interfaces. The test station outside the hall is not limited by the height and area of ​​the test hall, is suitable for more products, and improves test efficiency.

[0017] A shielding wall is used to separate the space inside the hall from the space outside the hall. The shielding wall can be used to isolate the space inside the hall from the space outside the hall to avoid mutual interference between the voltage inside the hall and the voltage outside the hall, which will affect the accuracy of the test results.

[0018] Based on the experimental system of the present invention, when testing the test product, according to the specifications and dimensions of the test product and the items that need to be tested, different opening and closing of the isolating switch and the grounding switch of different three-position isolating grounding switches are coordinated, so as to realize the power frequency withstand voltage test in the hall, the power frequency withstand voltage test outside the hall and the lightning impulse electric shock test outside the hall, which is suitable for the testing of more products. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the multi-boost interface lead-out test system of the power frequency withstand voltage equipment of the present invention.

[0020] Figure 2 It is a connection diagram of the power frequency withstand voltage test in the hall space in the present invention.

[0021] Figure 3 It is a connection diagram of the power frequency withstand voltage test in the space outside the hall in the present invention.

[0022] Figure 4 It is a connection diagram of the power frequency withstand voltage test on the busbar of the test product in the space outside the hall in the present invention.

[0023] Figure 5 It is a connection diagram of the lightning impulse electric shock test carried out in the space outside the hall in the present invention. DETAILED DESCRIPTION

[0024] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0025] like Figure 1 A power frequency withstand voltage equipment multi-boost interface lead-out test system shown, comprising

[0026] A test hall, the inner space of the test hall is the outer space, the outer space of the test hall is the outer space, the inner space of the test hall is provided with an isolating switch, an inner bushing, a first three-station isolating grounding switch and test equipment, the outer bushing, a second three-station isolating grounding switch and a third three-station isolating grounding switch are provided in the outer space of the test hall, the test equipment includes a gas power frequency test transformer 1 and a lightning impulse device, such as Figure 1 As shown in the figure, DS1 represents the isolating switch, BSG1 represents the inner bushing, BSG2 represents the outer bushing, DES1 represents the first three-position isolating and grounding switch, DES2 represents the second three-position isolating and grounding switch, and DES3 represents the third three-position isolating and grounding switch.

[0027] The gas power frequency test transformer 1, the isolating switch and the third three-station isolating and grounding switch are connected through the tube bus 2. A mouth-to-mouth bus interface is also connected to the end of the tube bus 2 on the side of the outside hall space. The first circuit located in the hall space and the second circuit located in the outside hall space are also connected in parallel between the isolating switch and the third three-station isolating and grounding switch on the tube bus 2. The first circuit is connected in sequence with the first three-station isolating and grounding switch and the inner bushing, and the second circuit is connected in sequence with the second three-station isolating and grounding switch and the outer bushing. The test product to be tested is connected to the inner bushing or the outer bushing or the mouth-to-mouth bus interface, and the lightning impulse device is connected to the inner bushing.

[0028] The space inside the test hall is separated from the space outside the hall by a shielding wall 3. The shielding wall 3 is used to separate the space inside the hall from the space outside the hall, and the shielding wall 3 is used to isolate the space inside the hall from the space outside the hall, so as to avoid mutual interference between the voltage inside the hall and the voltage outside the hall, thereby affecting the accuracy of the test results.

[0029] The test method of the above-mentioned power frequency withstand voltage equipment multi-boost interface lead-out test system includes the following steps:

[0030] S1: First, select the test site according to the specifications of the test product to be tested and the test content. If it is necessary to conduct a power frequency withstand voltage test in the hall space, go to step S2. If it is necessary to conduct a power frequency withstand voltage test in the hall space, go to step S3. If it is necessary to conduct a lightning impulse voltage test in the hall space, go to step S6.

[0031] S2: The test equipment uses a gas power frequency test transformer 1, the test equipment is connected to the tube bus 2, and the test product to be tested is connected to the inner bushing, such as Figure 2 As shown, the isolating switch is closed, the isolating switch in the first three-station isolating and grounding switch is closed, the grounding switch in the first three-station isolating and grounding switch is opened, the isolating switch in the second three-station isolating and grounding switch is opened, the grounding switch in the second three-station isolating and grounding switch is closed, the isolating switch in the third three-station isolating and grounding switch is opened, and the grounding switch in the third three-station isolating and grounding switch is closed. At this time, the inner bushing is energized, and a high-voltage line is led from the inner bushing to perform a power frequency withstand voltage test on the sample to be tested.

[0032] S3: Determine whether the test product needs to be tested by a separate bus test. If not, proceed to step S4; if necessary, proceed to step S5.

[0033] S4: The test equipment uses a gas power frequency test transformer 1, the test equipment is connected to the tube bus 2, and the test product to be tested is connected to the outer casing, such as Figure 3As shown, the isolating switch is closed, the isolating switch in the first three-station isolating and grounding switch is opened, the grounding switch in the first three-station isolating and grounding switch is closed, the isolating switch in the second three-station isolating and grounding switch is closed, the grounding switch in the second three-station isolating and grounding switch is opened, the isolating switch in the third three-station isolating and grounding switch is opened, and the grounding switch in the third three-station isolating and grounding switch is closed. At this time, the outer casing is energized, and a high-voltage line is led from the outer casing to carry out a power frequency withstand voltage test on the test product to be tested.

[0034] S5: The test equipment uses a gas power frequency test transformer 1, the test equipment is connected to the tube bus 2, and the test product to be tested is connected to the port-to-port bus interface, such as Figure 4 As shown, the isolating switch is closed, the isolating switch in the first three-station isolating and grounding switch is opened, the grounding switch in the first three-station isolating and grounding switch is closed, the isolating switch in the second three-station isolating and grounding switch is opened, the grounding switch in the second three-station isolating and grounding switch is closed, the isolating switch in the third three-station isolating and grounding switch is closed, and the grounding switch in the third three-station isolating and grounding switch is opened. At this time, the port-to-port busbar interface is energized, and the power frequency withstand voltage test is carried out on the test product to be tested.

[0035] S6: The test equipment is a lightning impulse device, which is connected to the inner casing and the test product to be tested is connected to the outer casing. Figure 5 As shown, the isolating switch is open, the isolating switch in the first three-station isolating and grounding switch is closed, the grounding switch in the first three-station isolating and grounding switch is open, the isolating switch in the second three-station isolating and grounding switch is closed, the grounding switch in the second three-station isolating and grounding switch is open, the isolating switch in the third three-station isolating and grounding switch is open, and the grounding switch in the third three-station isolating and grounding switch is closed. At this time, the lightning impulse device leads the voltage from the inner bushing to the outer bushing to perform a lightning impulse electric shock test on the test product.

[0036] The test method of the present invention is based on the experimental system of the present invention. When testing the sample to be tested, according to the specifications and dimensions of the sample to be tested and the items to be tested, different opening and closing of the isolating switch and the grounding switch of different three-position isolating grounding switches are coordinated, so that the power frequency withstand voltage test in the hall, the power frequency withstand voltage test outside the hall, and the lightning impulse electric shock test outside the hall can be realized, which is suitable for the testing of more products.

[0037] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A power frequency withstand voltage equipment multi-boost interface lead-out test system, characterized by: include A test hall, wherein the space inside the test hall is provided with an isolating switch, an inner bushing, a first three-station isolating and grounding switch and test equipment, and the space outside the test hall is provided with an outer bushing, a second three-station isolating and grounding switch and a third three-station isolating and grounding switch, and the test equipment includes a gas power frequency test transformer and a lightning impulse device; The gas power frequency test transformer, the isolating switch and the third three-station isolating and grounding switch are connected through a tube bus, and a mouth-to-mouth bus interface is also connected to the end of the tube bus located on the side of the outside hall space. On the tube bus, a first circuit located in the hall space and a second circuit located in the outside hall space are also connected in parallel between the isolating switch and the third three-station isolating and grounding switch. The first circuit is connected in sequence with the first three-station isolating and grounding switch and the inner bushing, and the second circuit is connected in sequence with the second three-station isolating and grounding switch and the outer bushing. The test product to be tested is connected to the inner bushing or the outer bushing or the mouth-to-mouth bus interface, and the lightning impulse device is connected to the inner bushing.

2. The power frequency withstand voltage equipment multi-boost interface lead-out test system according to claim 1 is characterized in that: The space inside the test hall and the space outside the hall are separated by a shielding wall.

3. The power frequency withstand voltage equipment multi-boost interface lead-out test system according to claim 1 is characterized in that: The test method of the multi-boost interface lead-out test system of power frequency withstand voltage equipment includes the following steps: S1: First, select the test site according to the specifications of the test product to be tested and the test content. If you need to perform a power frequency withstand voltage test in the hall space, proceed to step S2. If you need to perform a power frequency withstand voltage test in the hall space outside, proceed to step S3. If you need to perform a lightning impulse voltage test in the hall space outside, proceed to step S6; S2: The test equipment uses a gas power frequency test transformer, the test equipment is connected to the tube bus, the test product to be tested is connected to the inner bushing, the isolating switch is closed, the isolating switch in the first three-station isolating and grounding switch is closed, the grounding switch in the first three-station isolating and grounding switch is opened, the isolating switch in the second three-station isolating and grounding switch is opened, the grounding switch in the second three-station isolating and grounding switch is closed, the isolating switch in the third three-station isolating and grounding switch is opened, and the grounding switch in the third three-station isolating and grounding switch is closed. At this time, the inner bushing is energized, and a high-voltage line is led from the inner bushing to perform a power frequency withstand voltage test on the test product to be tested; S3: Determine whether the test product to be tested needs to undergo a separate busbar test. If not, proceed to step S4. If necessary, proceed to step S5. S4: The test equipment uses a gas power frequency test transformer, the test equipment is connected to the tube bus, the test product to be tested is connected to the outer casing, the isolating switch is closed, the isolating switch in the first three-station isolating and grounding switch is opened, the grounding switch in the first three-station isolating and grounding switch is closed, the isolating switch in the second three-station isolating and grounding switch is closed, the grounding switch in the second three-station isolating and grounding switch is opened, the isolating switch in the third three-station isolating and grounding switch is opened, and the grounding switch in the third three-station isolating and grounding switch is closed. At this time, the outer casing is energized, and a high-voltage line is led from the outer casing to perform a power frequency withstand voltage test on the test product to be tested; S5: The test equipment uses a gas power frequency test transformer, the test equipment is connected to the tube bus, the test product to be tested is connected to the port-to-port bus interface, the isolating switch is closed, the isolating switch in the first three-station isolating grounding switch is opened, the grounding switch in the first three-station isolating grounding switch is closed, the isolating switch in the second three-station isolating grounding switch is opened, the grounding switch in the second three-station isolating grounding switch is closed, the isolating switch in the third three-station isolating grounding switch is closed, and the grounding switch in the third three-station isolating grounding switch is opened. At this time, the port-to-port bus interface is energized, and the power frequency withstand voltage test is performed on the test product to be tested; S6: The test equipment is a lightning impulse device, which is connected to the inner bushing, and the test product to be tested is connected to the outer bushing. The isolating switch is opened, the isolating switch in the first three-station isolating and grounding switch is closed, the grounding switch in the first three-station isolating and grounding switch is opened, the isolating switch in the second three-station isolating and grounding switch is closed, the grounding switch in the second three-station isolating and grounding switch is opened, the isolating switch in the third three-station isolating and grounding switch is opened, and the grounding switch in the third three-station isolating and grounding switch is closed. At this time, the lightning impulse device leads the voltage from the inner bushing to the outer bushing to perform a lightning impulse electric shock test on the test product to be tested.

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