CN110907783A - Power frequency withstand voltage test device - Google Patents
Power frequency withstand voltage test device Download PDFInfo
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- CN110907783A CN110907783A CN201911400768.7A CN201911400768A CN110907783A CN 110907783 A CN110907783 A CN 110907783A CN 201911400768 A CN201911400768 A CN 201911400768A CN 110907783 A CN110907783 A CN 110907783A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/16—Construction of testing vessels; Electrodes therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
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Abstract
本发明涉及一种工频耐压试验装置，试验变压器通过进电接线端子与供电电源连接，从而对供电电源输出的电压进行升压，并通过导电杆、保护电阻和出电接线端子将升压后的电压施加到被测产品上来进行工频耐压试验；由电压信号测量装置测得对被测产品所施加的电压。由于试验变压器、保护电阻和高压电容集成设置在密封的密封绝缘气体容器中，所以，本发明的一种工频耐压试验装置干扰途径少，抗干扰能力强，且结构紧凑，占地面积较小。
The invention relates to a power frequency withstand voltage test device. A test transformer is connected to a power supply through an incoming terminal, so as to boost the output voltage of the power supply, and the voltage is boosted through a conductive rod, a protection resistor and an outgoing terminal. After the voltage is applied to the product under test, the power frequency withstand voltage test is carried out; the voltage applied to the product under test is measured by the voltage signal measuring device. Because the test transformer, the protection resistor and the high-voltage capacitor are integrated in the sealed sealed insulating gas container, the power frequency withstand voltage test device of the present invention has few interference paths, strong anti-interference ability, compact structure, and occupies a relatively small area. Small.
Description
Technical Field
The invention relates to a power frequency withstand voltage test device, belonging to a detection device of high-voltage power transmission and distribution equipment.
Background
In the multipurpose oil-immersed or gas-insulated testing transformer of the power frequency withstand voltage testing device in the prior art, an internal electromagnetic induction type measuring winding is adopted to serve as a rough monitoring test voltage, an external oil-immersed capacitive voltage divider is arranged to accurately measure the voltage, and because the internal electromagnetic induction type measuring winding cannot accurately measure the output voltage, if the output voltage needs to be accurately measured, a high-voltage capacitive voltage divider is required to be additionally arranged for measurement, so that external high-voltage leads are added, an interference approach is increased, the external voltage divider is generally in an oil-immersed type, and the size and the weight are large. The protection resistor in the power frequency withstand voltage test device in the prior art is generally external, the external protection resistor enables the whole structure to be larger, and interference ways are increased. On the other hand, the external test transformer, the high-voltage capacitive voltage divider and the protection resistor in the power frequency withstand voltage test device in the prior art are generally arranged in a three-point one-line or triangular mode, the safety distance between the external test transformer, the high-voltage capacitive voltage divider and the protection resistor needs to be fully considered during arrangement, and the operation is inconvenient.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention aims to provide a power frequency voltage withstand test apparatus, which can conveniently perform a power frequency voltage withstand test, and has a compact structure and a small floor area.
In order to achieve the purpose, the invention provides a power frequency voltage withstand test device, which comprises a sealed insulated gas container; a test transformer is arranged in the sealed insulating gas container, a primary coil of the test transformer is a low-voltage side, and a secondary coil of the test transformer is a high-voltage side; the primary coil is connected with an electricity inlet connecting terminal exposed out of the sealed insulating gas container, a conducting rod is arranged in the sealed insulating gas container, one end of the conducting rod is connected with the secondary coil, a protective resistor is connected on the conducting rod in series, and the other end of the conducting rod is connected with an electricity outlet connecting terminal exposed out of the sealed insulating gas container; the outgoing electric connection terminal is used for connecting a product to be tested; and a high-voltage capacitor cylinder is further arranged in the sealed insulating gas container, surrounds the outer side of the conducting rod and is connected with a voltage signal measuring device.
Preferably, the sealed insulating gas container is formed by sealing a main sealing cylinder seat, an intermediate sealing cylinder and an insulating sleeve which are sequentially arranged from bottom to top; the lower end of the main sealing cylinder seat is blocked by a lower sealing end cover, the upper end of the main sealing cylinder seat is communicated with the lower end of the middle sealing cylinder body, the upper end of the middle sealing cylinder body is communicated with the lower end of the insulating sleeve, and the upper end of the insulating sleeve is blocked by an upper sealing end cover;
the iron core of the test transformer is supported on the lower sealing end cover;
the high-voltage capacitor cylinder is arranged on the inner side of the middle sealing cylinder body;
the outlet electric connection terminal is connected to the upper sealing end cover.
More preferably, the protection resistor is formed by spirally winding a Cr20Ni80 wire.
More preferably, the upper end of the insulating sleeve is further provided with a high-voltage electric field shielding cover, and the high-voltage electric field shielding cover surrounds the outer side of the outgoing electric connection terminal.
More preferably, the upper end of the high-voltage capacitor cylinder is connected with a first high-voltage electric field shielding cylinder.
More preferably, a second high-voltage electric field shielding cylinder is arranged on the outer side of the coil winding of the test transformer, and a wire passing hole for leading-out wires of the primary coil of the test transformer to pass through is formed in the middle of the second high-voltage electric field shielding cylinder.
Furthermore, electric field shielding rings are arranged at the upper end and the lower end of the coil of the test transformer.
Preferably, a junction box is arranged on the outer side wall of the main sealing cylinder seat, and the power inlet wiring terminal is arranged in the junction box; and the high-voltage capacitance cylinder is connected with the voltage signal measuring device through a conducting wire penetrating through the outer side wall of the main sealing cylinder seat.
Preferably, the voltage signal measuring device comprises a low-voltage capacitor arranged outside the sealed insulating gas container, and the low-voltage capacitor is connected with the high-voltage capacitor cylinder in series.
Preferably, a density relay for detecting the air pressure in the sealed and insulated gas container is further included.
Preferably, still including setting up in the voltage regulator and the switch board in the sealed insulating gas container outside, be equipped with power supply in the switch board, power supply pass through the voltage regulator with advance electric binding post and connect.
As mentioned above, the power frequency withstand voltage test device provided by the invention has the following beneficial effects: in the power frequency withstand voltage test device, the test transformer is connected with the power supply through the power-in wiring terminal, so that the voltage output by the power supply is boosted, and the boosted voltage is applied to a tested product through the conducting rod, the protective resistor and the power-out wiring terminal to carry out a power frequency withstand voltage test; the voltage applied to the product to be measured is measured by the voltage signal measuring device. Because the test transformer, the protective resistor and the high-voltage capacitor cylinder are integrated in the sealed and insulated gas container, the power frequency withstand voltage test device has the advantages of less interference ways, strong anti-interference capability, compact structure and smaller occupied area.
Drawings
Fig. 1 shows an electrical connection schematic diagram of an industrial frequency withstand voltage test device of the invention.
Fig. 2 shows a schematic structural diagram of an industrial frequency withstand voltage test device of the invention.
Fig. 3 is an enlarged schematic view of a portion a of fig. 2.
Fig. 4 shows a schematic view of the upper end of the insulating sleeve.
Description of the element reference numerals
| 1 | Sealed |
| 2 | Test transformer |
| 3 | Coil winding of |
| 4 | Primary coil lead-out |
| 5 | Power-in |
| 6 | Conducting |
| 7 | |
| 8 | Outlet |
| 9 | High- |
| 10 | Main |
| 11 | Middle sealing |
| 12 | Insulating |
| 13 | Lower sealing |
| 14 | Upper sealing |
| 15 | |
| 16 | High-voltage electric |
| 17 | First high-voltage electric |
| 18 | Second high-voltage electric |
| 19 | Electric |
| 20 | |
| 21 | |
| 22 | Low- |
| 23 | |
| 24 | |
| 25 | |
| 26 | Measuring signal line |
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Referring to fig. 1 and fig. 2, the present invention provides a power frequency withstand voltage test apparatus, which includes a sealed insulating gas container 1; a test transformer 2 is arranged in the sealed insulating gas container 1, a primary coil of the test transformer 2 is a low-voltage side, and a secondary coil of the test transformer 2 is a high-voltage side; the primary coil is connected with an electricity inlet connecting terminal 5 exposed out of the sealed insulating gas container 1, a conducting rod 6 is arranged in the sealed insulating gas container 1, one end of the conducting rod 6 is connected with the secondary coil, a protective resistor 7 is connected in series on the conducting rod 6, and the other end of the conducting rod 6 is connected with an electricity outlet connecting terminal 8 exposed out of the sealed insulating gas container 1; the outlet electric connection terminal 8 is used for connecting a product to be tested; and a high-voltage capacitor cylinder 9 is further arranged in the sealed insulating gas container 1, the high-voltage capacitor cylinder 9 surrounds the outer side of the conducting rod 6, and the high-voltage capacitor cylinder 9 is connected with a voltage signal measuring device.
In the power frequency withstand voltage test device, a test transformer 2 is connected with a power supply through a power inlet wiring terminal 5 so as to boost the voltage output by the power supply, and the boosted voltage is applied to a tested product through a conducting rod 6, a protective resistor 7 and an outlet wiring terminal 8 so as to carry out a power frequency withstand voltage test; the voltage applied to the product to be tested can be measured by the voltage signal measuring device. Because the test transformer 2, the protective resistor 7 and the high-voltage capacitor tube 9 are integrated in the sealed insulating gas container 1, the external interference is small, the interference paths are few, the anti-interference capability is strong, the whole structure is compact, the occupied area is small, and the space resources are greatly saved.
In the power frequency withstand voltage test device of the invention, the voltage applied to the tested product is obtained through the voltage signal measuring device and the high-voltage capacitor cylinder 9, in order to facilitate the connection of the high-voltage capacitor cylinder 9 and the voltage signal measuring device, as shown in fig. 2, a junction box 20 is arranged on the outer side wall of the main sealing cylinder base 10, the high-voltage capacitor cylinder 9 is connected with the voltage signal measuring device through a conductive wire 21 penetrating through the outer side wall of the main sealing cylinder base 10, the conductive wire 21 is connected in the junction box 20, in order to facilitate the connection of the power supply terminal 5 and a power supply arranged on the outer side of the sealed insulating gas container 1, the power supply terminal 5 is arranged in the junction box 20, and the power supply is connected with the power supply terminal 5. As shown in fig. 2, the power frequency withstand voltage test device of the present invention further includes a voltage regulator 24 and a control cabinet 25 which are disposed outside the sealed insulating gas container 1, a power supply is disposed in the control cabinet 25, the power supply is connected to the power input connection terminal 5 through the voltage regulator 24, and the voltage input to the coil winding of the test transformer 2 can be adjusted through the voltage regulator 24. The sealed insulating gas container 1 is filled with high-voltage SF6 insulating gas, and in order to facilitate detection of the air pressure in the sealed insulating gas container 1, the power frequency withstand voltage test device further comprises a density relay 23 for detecting the air pressure in the sealed insulating gas container 1.
In an industrial frequency withstand voltage testing apparatus of the present invention, a voltage applied to a ground of a conducting rod 6, that is, a voltage applied to a tested product, can be obtained through a voltage signal measuring apparatus and a high voltage capacitor 9, and in order to obtain a voltage applied to the conducting rod 6, as a preferred embodiment, referring to fig. 1, the voltage signal measuring apparatus includes a low voltage capacitor 22 disposed outside a sealed insulating gas container 1, the low voltage capacitor 22 is connected in series with the high voltage capacitor 9, a high voltage capacitor is formed between the high voltage capacitor 9 and the conducting rod 6, and the low voltage capacitor 22 and the high voltage capacitor form a series capacitor. According to the principle of capacitor series voltage division, for two capacitors connected in series, assuming that the voltage to ground of the conducting rod 6 is U, the capacitor C1 of the high-voltage capacitor formed by the high-voltage capacitor tube 9 and the conducting rod 6 and the capacitor C2 of the low-voltage capacitor 22 are known, and the voltages on the high-voltage capacitor and the low-voltage capacitor 22 are U1 and U2 respectively, the following formulas are used:
U1=C2*U/(C1+C2) （1）
U2=C1*U/(C1+C2) （2）
by combining the formulas (1) and (2), the voltage U1 on the high-voltage capacitor and the voltage U of the conducting rod 6 to the ground can be obtained by measuring the voltage U2 on the low-voltage capacitor 22. Therefore, the high voltage of the conducting rod 6 to the ground can be obtained only by measuring the voltage of the low-voltage capacitor 22 with lower voltage, the low voltage measurement is easier and safer, the requirement on a measuring device is lower, and the cost is lower. Referring to fig. 1, the voltage signal measuring apparatus further includes a measuring device (not shown in fig. 1) disposed in the control cabinet 25 for measuring the voltage value of the low-voltage capacitor 22, and the measuring device for measuring the voltage value of the low-voltage capacitor 22 is connected to the low-voltage capacitor 22 through a measuring signal line 26 to measure the voltage value of the low-voltage capacitor 22.
When the power frequency voltage withstand test device of the invention is used for performing a power frequency voltage withstand test, the voltage at the electric outlet terminal 8 is higher, the upper end of the insulating sleeve 12 near the electric outlet terminal 8 is provided with structure sharp corners which are positioned on the outer shell of the insulating sleeve 12 and belong to a low potential, the electric outlet terminal 8 is easy to discharge to the structure sharp corners, and in order to prevent an electric shock terminal from discharging to the structure sharp corners at the upper end of the insulating sleeve 12, as a preferred embodiment, as shown in fig. 2 and 4, the upper end of the insulating sleeve 12 is further provided with a high-voltage electric field shielding cover 16, and the high-voltage electric field shielding cover 16 surrounds the outer side of the electric outlet terminal 8 (the electric contact terminal 8 is not shown in fig. 2, and the electric outlet terminal 8 is positioned at the top end of the conducting rod 6 and is arranged at the central position of the upper sealing end. Therefore, the high-voltage electric field shielding cover 16 plays a role in shielding the high-voltage electric field at the outgoing electric connection terminal 8, so that the outgoing electric connection terminal 8 is not easy to discharge to the surrounding low potential, and the interference on a power frequency withstand voltage test is reduced.
As shown in fig. 2, the high voltage capacitor cylinder 9 is made of a conductive material, referring to fig. 2 and fig. 3, the conductive rod 6 is at a high potential, the outer shell at the lower end of the insulating sleeve 12 is at a low potential, the outer shell at the lower end of the insulating sleeve 12 has a sharp corner structure, the conductive rod 6 is easy to discharge to the sharp corner structure to interfere with the power frequency withstand voltage test, in order to eliminate the interference, the upper end of the high voltage capacitor cylinder 9 is connected with a first high voltage electric field shielding cylinder 17, and the first high voltage shielding cylinder can shield the electric field at the lower part of the conductive rod 6 to prevent the conductive rod 6 from discharging to the sharp corner structure on.
Coil winding 3 of test transformer is pagoda-shaped, by first coil and second coil are constituteed, and the voltage in coil winding 3 of test transformer is higher, and in order to prevent coil winding 3 of test transformer to produce corona or puncture to the outer discharge, produce the interference to power frequency withstand voltage test, as an preferred implementation mode, as shown in fig. 2, the coil outside of test transformer 2 is equipped with second high-voltage electric field shielding section of thick bamboo 18, and second high-voltage electric field shielding section of thick bamboo 18 can shield coil winding and discharge to its surrounding low potential structure to reduce the interference to power frequency withstand voltage test. In order to better shield the electric field generated by the coil winding 3 of the test transformer and prevent the interference of discharge, as shown in fig. 2, electric field shielding rings 19 are disposed at the upper and lower ends of the coil of the test transformer 2. In order to facilitate the primary coil outgoing line 4 connected to the power input connection terminal 5 to be led out from the primary coil of the test transformer 2, as shown in fig. 2, a wire passing hole (a small circular hole, not shown in fig. 2) for the primary coil outgoing line 4 of the test transformer 2 to pass through is formed in the middle of the second high-voltage electric field shielding cylinder 18.
In order to make the power frequency voltage withstand test device of the invention more compact and reasonable in structure, as shown in fig. 2, the sealed insulating gas container 1 is formed by sealing a main sealing cylinder seat 10, a middle sealing cylinder 11 and an insulating sleeve 12 which are sequentially arranged from bottom to top; the lower end of the main sealing cylinder seat 10 is blocked by a lower sealing end cover 13, the upper end of the main sealing cylinder seat 10 is communicated with the lower end of the middle sealing cylinder body 11, the upper end of the middle sealing cylinder body 11 is communicated with the lower end of an insulating sleeve 12, and the upper end of the insulating sleeve 12 is blocked by an upper sealing end cover 14; an iron core 15 of the test transformer 2 is supported on the lower sealing end cover 13, and the iron core 15 is square; the high-voltage capacitor 9 is arranged on the inner side of the middle sealing cylinder body 11; the outlet terminal 8 is connected to an upper sealing end cap 14. Therefore, the whole test device is supported by the main sealing cylinder seat 10, the diameters of the main sealing cylinder seat 10, the middle sealing cylinder 11 and the insulating sleeve 12 are sequentially reduced, the whole test device is of a pagoda-shaped structure, a vertical installation mode is adopted, the main sealing cylinder seat 10 and the test transformer 2 in the main sealing cylinder seat are the largest in gravity, the center of the whole test device is lower, and the structure and the installation mode not only can enable the power frequency voltage withstand test device to be stably supported on the ground, but also can effectively reduce the occupied area.
In order to make the performance of the protection resistor 7 more excellent and effectively protect the main circuit of the testing device, as a preferred embodiment, the protection resistor 7 is formed by spirally winding a Cr20Ni80 wire. The protection resistor 7 formed by spirally winding the Cr20Ni80 wire has both resistance and inductive reactance characteristics, and is more effective in protecting the main loop of the test device.
Based on the technical scheme of the embodiment, the power frequency withstand voltage test device provided by the invention has the advantages that the test transformer 2 generating high voltage, the high-voltage capacitor 9 and the protection resistor 7 are all arranged in the integrated SF6 sealed insulating gas container 1, so that the external interference is small, the interference to the outside is small, the interference paths are few, the partial discharge is small, the anti-interference capability is strong, the measurement is more accurate, the integral structure is compact, the occupied area is small, the space resource is greatly saved, and the device is convenient to move and use.
In conclusion, the present invention effectively overcomes various disadvantages of the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A power frequency withstand voltage test device is characterized by comprising a sealed insulated gas container; a test transformer is arranged in the sealed insulating gas container, a primary coil of the test transformer is a low-voltage side, and a secondary coil of the test transformer is a high-voltage side; the primary coil is connected with an electricity inlet connecting terminal exposed out of the sealed insulating gas container, a conducting rod is arranged in the sealed insulating gas container, one end of the conducting rod is connected with the secondary coil, a protective resistor is connected on the conducting rod in series, and the other end of the conducting rod is connected with an electricity outlet connecting terminal exposed out of the sealed insulating gas container; the outgoing electric connection terminal is used for connecting a product to be tested; and a high-voltage capacitor cylinder is further arranged in the sealed insulating gas container, surrounds the outer side of the conducting rod and is connected with a voltage signal measuring device.
2. The power frequency withstand voltage test device according to claim 1, wherein: the sealed insulating gas container is formed by sealing a main sealing cylinder seat, an intermediate sealing cylinder and an insulating sleeve which are sequentially arranged from bottom to top; the lower end of the main sealing cylinder seat is blocked by a lower sealing end cover, the upper end of the main sealing cylinder seat is communicated with the lower end of the middle sealing cylinder body, the upper end of the middle sealing cylinder body is communicated with the lower end of the insulating sleeve, and the upper end of the insulating sleeve is blocked by an upper sealing end cover;
the iron core of the test transformer is supported on the lower sealing end cover;
the high-voltage capacitor cylinder is arranged on the inner side of the middle sealing cylinder body;
the outlet electric connection terminal is connected to the upper sealing end cover.
3. The power frequency withstand voltage test device according to claim 2, wherein: the protection resistor is formed by spirally winding a Cr20Ni80 conducting wire.
4. The power frequency withstand voltage test device according to claim 2, wherein: and the upper end of the insulating sleeve is also provided with a high-voltage electric field shielding cover which surrounds the outer side of the electric outlet connection terminal.
5. The power frequency withstand voltage test device according to claim 2, wherein: the upper end of the high-voltage capacitance cylinder is connected with a first high-voltage electric field shielding cylinder.
6. The power frequency withstand voltage test device according to claim 2, wherein: and a second high-voltage electric field shielding cylinder is arranged on the outer side of the coil winding of the test transformer, and a wire passing hole for leading-out wires of the primary coil of the test transformer to pass through is formed in the middle of the second high-voltage electric field shielding cylinder.
7. The power frequency withstand voltage test device according to claim 6, wherein: and electric field shielding rings are arranged at the upper end and the lower end of the coil of the test transformer.
8. The power frequency withstand voltage test device according to claim 1, wherein: the outer side wall of the main sealing cylinder seat is provided with a junction box, and the power inlet wiring terminal is arranged in the junction box; and the high-voltage capacitance cylinder is connected with the voltage signal measuring device through a conducting wire penetrating through the outer side wall of the main sealing cylinder seat.
9. The power frequency withstand voltage test device according to claim 1, wherein: the voltage signal measuring device comprises a low-voltage capacitor arranged on the outer side of the sealed insulating gas container, and the low-voltage capacitor is connected with the high-voltage capacitor cylinder in series.
10. The power frequency withstand voltage test device according to claim 1, wherein: still including setting up in the voltage regulator and the switch board in the sealed insulating gas container outside, be equipped with power supply in the switch board, power supply pass through the voltage regulator with advance electric binding post and connect.
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| CN201911400768.7A CN110907783A (en) | 2019-12-31 | 2019-12-31 | Power frequency withstand voltage test device |
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| CN201911400768.7A CN110907783A (en) | 2019-12-31 | 2019-12-31 | Power frequency withstand voltage test device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116298711A (en) * | 2022-11-29 | 2023-06-23 | 国网黑龙江省电力有限公司电力科学研究院 | A power frequency test device used in alpine conditions |
| CN119738677A (en) * | 2024-12-30 | 2025-04-01 | 合肥博雷电气有限公司 | Withstand voltage test fixture |
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| CN208902830U (en) * | 2018-08-29 | 2019-05-24 | 中节能启源雷宇（江苏）电气科技有限公司 | A kind of small-sized industrial frequency withstand voltage local discharge test device of monoblock type |
| CN110133494A (en) * | 2019-06-05 | 2019-08-16 | 国网江苏省电力有限公司苏州供电分公司 | Industrial frequency AC Withstand test device |
| CN212622909U (en) * | 2019-12-31 | 2021-02-26 | 上海腾炎试验设备有限公司 | Power frequency withstand voltage test device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116298711A (en) * | 2022-11-29 | 2023-06-23 | 国网黑龙江省电力有限公司电力科学研究院 | A power frequency test device used in alpine conditions |
| CN119738677A (en) * | 2024-12-30 | 2025-04-01 | 合肥博雷电气有限公司 | Withstand voltage test fixture |
| CN119738677B (en) * | 2024-12-30 | 2025-05-13 | 合肥博雷电气有限公司 | Pressure test tooling |
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