CN111596101A - Elbow type cable test system - Google Patents
Elbow type cable test system Download PDFInfo
- Publication number
- CN111596101A CN111596101A CN202010498596.8A CN202010498596A CN111596101A CN 111596101 A CN111596101 A CN 111596101A CN 202010498596 A CN202010498596 A CN 202010498596A CN 111596101 A CN111596101 A CN 111596101A
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- elbow
- insulating plug
- nut
- insulating
- head
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0416—Connectors, terminals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0425—Test clips, e.g. for IC's
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/18—Screening arrangements against electric or magnetic fields, e.g. against earth's field
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a toggle cable test system, which comprises a toggle cable, a tested end extension device and a tail end plugging device, wherein a wiring terminal of a tested end toggle head is provided with a first wiring hole, a wiring terminal of the tail end toggle head is provided with a second wiring hole, the tested end extension device comprises an extension rod and a first insulating plug, the first insulating plug is in threaded connection with the extension rod after passing through the first wiring hole, the first insulating plug is provided with a conduit screw rod, one end of the extension rod is provided with a first nut for screwing the conduit screw rod in, the other end of the extension rod is connected with a test clamp, the tail end plugging device comprises a second insulating plug and a third insulating plug, the second insulating plug is in threaded connection with the third insulating plug after passing through the second wiring hole, the second insulating plug is provided with a screw rod, and a threaded hole for screwing the screw rod in is formed in the third insulating plug; the safety distance between the wiring terminal and other equipment can be increased, the workload is reduced, the working efficiency is improved, the sealing of the tail end elbow-shaped head can be realized, and the flashover is avoided.
Description
Technical Field
The invention relates to the technical field of cables, in particular to an elbow type cable test system.
Background
At present, when carrying out diagnostic test to power cable, elbow type power cable does not have the condition of directly carrying out withstand voltage test, for guaranteeing safe distance, need demolish elbow type cable, be about to elbow type head and stress cone take off, let the cable be in can the experimental state, the loaded down with trivial details will cost a large amount of manual works and time like this, work efficiency is low, wherein, test clip is direct to be connected with elbow type head binding post, lead to being tried end and external equipment safe distance not enough like this, experimental safe guarantee is not high, can't require "according to the test procedure" exert corresponding voltage value to being tried the cable, in addition when experimental, be full of the humidity around the elbow type cable tail end, tail end binding post is close with elbow type head shell creepage distance, easily take place flashover and discharge.
Disclosure of Invention
In view of the above problems, the present invention aims to provide an elbow type cable testing system, which aims to solve the technical problems of large workload, low working efficiency, insufficient safety distance and flashover discharge in the existing testing.
The invention is realized by the following technical scheme:
an elbow cable testing system comprising:
the elbow type cable comprises a tested end elbow type head and a tail end elbow type head, wherein a wiring terminal of the tested end elbow type head is provided with a first wiring hole, and a wiring terminal of the tail end elbow type head is provided with a second wiring hole;
the device comprises a tested end extending device and a test clamp, wherein the tested end extending device comprises an extending rod with a conductive core wire and a first insulating plug, the first insulating plug is in threaded connection with the extending rod after passing through a first wiring hole, the first insulating plug is provided with a guide pipe screw rod, one end of the extending rod is provided with a first nut for screwing the guide pipe screw rod, and the other end of the extending rod is connected with the test clamp;
tail end plugging device, tail end plugging device includes second insulating stopper and third insulating stopper, the second insulating stopper passes through behind the second wiring hole with third insulating stopper threaded connection, the second insulating stopper has the lead screw, set up the confession in the third insulating stopper the screw hole of lead screw in.
Optionally, a second nut for positioning is arranged on the conduit screw of the first insulating plug.
Furthermore, the first nut is embedded at one end of the extension rod, the inner diameter of the first nut is matched with the conduit screw rod, and the outer diameter of the first nut is matched with the connecting wire terminal of the elbow-shaped head at the tested end;
one end of the first insulating plug, which is provided with the guide pipe screw rod, is provided with a first groove matched with the second nut, and the width of the first groove in the direction of the guide pipe screw rod is larger than that of the second nut.
Optionally, a third nut for positioning is arranged on the lead screw of the second insulating plug.
Furthermore, a second groove matched with the third nut is formed in one end, provided with the screw rod, of the second insulating plug, and the width of the second groove is larger than that of the third nut in the screw rod direction;
one end of the third insulating plug, which is provided with the threaded hole, is provided with a third groove matched with the terminal of the tail elbow type head.
Optionally, the extension rod is connected to the first insulating plug and has an end with a size corresponding to the size of the elbow head housing.
Optionally, the first insulating plug, the second insulating plug and the third insulating plug are all sized to fit the size of the elbow head housing.
Optionally, the elbow head housing is a semiconducting material.
Optionally, the housing of the extension pole is a flexible insulating material.
Optionally, the first insulating plug, the second insulating plug, and the third insulating plug are all made of epoxy resin.
Compared with the prior art, the invention has the following advantages and beneficial effects:
according to the elbow type cable test system provided by the invention, the tested end extension device is connected with an elbow type cable, and particularly, the first insulation plug is in threaded connection with the extension rod after passing through the first wiring hole, the extension rod is arranged without taking down the elbow type head of the tested end and a stress cone, so that the test is directly carried out, the workload is reduced, the working efficiency is improved, the safety distance between the tested end and external equipment is ensured, the test requirement is met, the sealing of the elbow type head of the tested end is realized by arranging the first insulation plug, the contact between the terminal of the tested end and humid air is isolated, the creepage distance between the terminal of the elbow type head of the tested end and the shell of the elbow type head of the tested end is increased, and flashover is not easy to occur; through setting up tail end plugging device at tail end elbow type head, specifically set up the second and insulate to fill in threaded connection through second wiring hole and third, can guarantee the complete sealing of tail end elbow type head, isolated and external humid air contact increases the creepage distance of tail end elbow type head binding post and tail end elbow type head shell, avoids the condition of flashover to take place.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic structural view of an elbow cable testing system provided by the present invention;
FIG. 2 is a schematic view of the device for extending a test end of the present invention in a state where the device and the elbow-shaped head are not tightened;
fig. 3 is a schematic view of the trailing end occluding device and the trailing end elbow head of the present invention in an untwisted state.
Reference numbers and corresponding part names:
1-elbow cable, 11-tested end elbow head, 111-first wiring hole, 12-tail end elbow head, 121-second wiring hole, 2-tested end extension device, 21-extension rod, 211-first nut, 22-first insulating plug, 221-guide screw rod, 222-second nut, 223-first groove, 3-test clamp, 4-tail end plugging device, 41-second insulating plug, 411-screw rod, 412-third nut, 413-second groove, 42-third insulating plug, 421-threaded hole, 422-third groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: it is not necessary to employ these specific details to practice the present invention. In other instances, well-known structures, circuits, materials, or methods have not been described in detail so as not to obscure the present invention.
Throughout the specification, reference to "one embodiment," "an embodiment," "one example," or "an example" means: the particular features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment of the invention. Thus, the appearances of the phrases "one embodiment," "an embodiment," "one example" or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Further, those of ordinary skill in the art will appreciate that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1 and fig. 2, the elbow cable 1 test system provided by the present invention comprises an elbow cable 1, a tested end extending device 2 and a tail end plugging device 4, wherein the elbow cable 1 comprises a tested end elbow head 11 and a tail end elbow head 12, a connection terminal of the tested end elbow head 11 has a first connection hole 111, and a connection terminal of the tail end elbow head 12 has a second connection hole 121; the extension device 2 for the tested end comprises an extension rod 21 with a conductive core wire and a first insulating plug 22, wherein the first insulating plug 22 is in threaded connection with the extension rod 21 after passing through a first wiring hole 111, the first insulating plug 22 is provided with a guide pipe screw rod 221, one end of the extension rod 21 is provided with a first nut 211 for screwing the guide pipe screw rod 221, and the other end of the extension rod 21 is connected with the test clamp 3; the tail end plugging device 4 comprises a second insulating plug 41 and a third insulating plug 42, the second insulating plug 41 is in threaded connection with the third insulating plug 42 after passing through the second wiring hole 121, the second insulating plug 41 is provided with a lead screw 411, and a threaded hole 421 for screwing the lead screw 411 is formed in the third insulating plug 42. Through the connection of the elbow-shaped head 11 of the tested end and the extension device 2 of the tested end, the experiment can be carried out without dismantling the elbow-shaped cable 1, namely, the elbow-shaped head 11 of the tested end and the stress cone are not required to be taken down, so that the workload is reduced, the working efficiency is improved, the safety distance between the tested end and other equipment is increased, the requirement of test regulations is met, the elbow-shaped head 11 of the tested end can be sealed, the contact between the tested end and moist air is isolated, the creepage distance is increased, and the flashover is difficult to occur; through set up tail end plugging device 4 in tail end elbow type head 12 department, realize the complete sealing to tail end elbow type head 12, isolated and moist air contact, increased creepage distance, the phenomenon of difficult emergence flashover.
As shown in fig. 2, the first insulating plug 22 having the conduit screw 221 passes through the first wiring hole 111 on the wiring terminal of the elbow head 11 at the tested end to be connected with the nut on the extension rod 21, and the extension rod 21 has a conductive core wire, so that the wiring terminal of the elbow head 11 at the tested end is conducted with the extension rod 21, and the other end of the extension rod 21 is used for being connected with the test clip 3, thereby realizing the conduction between the wiring terminal of the elbow head 11 at the tested end and external equipment, increasing the safety distance between the elbow head 11 at the tested end and other equipment, meeting the requirements of test regulations, and in addition, the arrangement of the first insulating plug 22 can realize the sealing of the elbow head 11 at the tested end, so that the periphery of the wiring terminal of the elbow head 11 at the tested end is completely isolated from the external humid air during testing, further, the discharge to the elbow head housing is avoided, and the creepage distance between the wiring terminal and the elbow head housing is increased, is not easy to flashover.
Specifically, a second nut 222 for positioning is arranged on a conduit screw 221 of the first insulating plug 22, the first nut 211 is embedded in one end of the extension rod 21, the inner diameter of the first nut 211 is matched with the conduit screw 221, and the outer diameter of the first nut 211 is matched with a connecting wire terminal of the tested end elbow-shaped head 11; one end of the first insulating plug 22 having the conduit screw 221 is provided with a first groove 223 matched with the second nut 222, and the width of the first groove 223 in the direction of the conduit screw 221 is larger than that of the second nut 222. When the device 2 for extending a test end is connected to the elbow head 11, the first insulating plug 22 passes through the first wire connecting hole 111 and then is screwed to the extension rod 21, that is, the second nut 222 is snapped into the first groove 223, and the second nut 222 and the first nut 211 of the extension rod 21 abut against the left and right ends of the wire connecting terminal of the elbow head 11, wherein, since the width of the first groove 223 is greater than the width of the second nut 222 when the second nut 222 is directly snapped into the first groove 223, and the second nut 222 is not flush when it is snapped into the first groove 223, which is equivalent to snap-in, the first insulating plug 22 has an extension portion with respect to the second nut 222, and the first nut 211 is also embedded in the extension rod 21, and the extension rod 21 also has an extension portion with respect to the first nut 211, therefore, when the first insulating plug 22 is screwed to the extension rod 21 after passing through the first wire connecting hole 111, the left and right ends of the elbow head 11 abut against the second nut 222 and the first nut 211, the extension part of the first insulating plug 22 abuts against the extension part of the extension rod 21, so that the terminal of the elbow head 11 at the tested end is in a completely closed state, the terminal is completely isolated from the external humid air, the creepage distance between the terminal and the elbow head shell is increased, and the flashover condition is prevented.
As shown in fig. 3, the second insulating plug 41 with the lead screw 411 passes through the second wiring hole 121 on the terminal of the tail-end elbow head 12 and is connected to the third insulating plug 42 with the corresponding internal thread hole 421, and during testing, the second insulating plug 41 and the third insulating plug 42 are directly screwed to completely seal the tail-end elbow head 12, so that the terminal of the tail-end elbow head 12 is completely isolated from the external humid air, and further, the elbow head casing is not discharged, the creepage distance between the terminal and the elbow head casing is increased, and flashover is not easy.
Specifically, a third nut 412 for positioning is arranged on a lead screw 411 of the second insulating plug 41, a second groove 413 matched with the third nut 412 is arranged at one end of the lead screw 411 of the second insulating plug 41, and the width of the second groove 413 is greater than that of the third nut 412 in the direction of the lead screw 411; the end of the third insulating plug 42 having the threaded hole 421 has a third recess 422 for fitting with the terminal of the trailing elbow head 12. When the tail-end plugging device 4 is connected to the tail-end elbow head 12, the second insulating plug 41 passes through the second wire connecting hole 121 and then is screwed to the third insulating plug 42, that is, the third nut 412 is snapped into the second groove 413, and the third grooves 422 in the third nut 412 and the third insulating plug 42 are abutted against the left and right ends of the wire connecting terminal of the tail-end elbow head 12, wherein, since the width of the second groove 413 is greater than that of the third nut 412 when the third nut 412 is directly snapped into the second groove 413, and the third nut 412 is snapped into the second groove 413 and is not flush, which is equivalent to an embedded snap, the second insulating plug 41 has an extension portion with respect to the third nut 412, and the third insulating plug 42 has the third groove 422 therein that is adapted to the wire connecting terminal of the tail-end elbow head 12, so that when the second insulating plug 41 is screwed to the third insulating plug 42 after passing through the second wire connecting hole 121, the left and right ends of the tail-end elbow head 12 are respectively abutted against the third nut 412 and the third groove 422, the extension of the second insulating plug 41 abuts directly against the third insulating plug 42, so that the terminal of the tail elbow 12 is in a completely closed state, and the terminal is completely isolated from the outside humid air, thereby increasing the creepage distance between the terminal and the elbow housing and preventing flashover.
In practical applications, the second nut 222 and the third nut 412 are configured to be positioned according to the size of the actual terminal.
Wherein, extension rod 21's shell is flexible insulating material, and flexible insulating material's setting makes extension rod 21 possess the bending and even turn right angle function, avoids blockking and can't test because of external equipment.
It should be noted that the length of the extension rod 21 can be customized according to actual conditions, so as to ensure a sufficient safety distance and meet the requirements of test regulations.
Wherein, the size of a dimension that extension rod 21 connects the one end of first insulating plug 22 and the size looks adaptation of elbow type head shell, the size looks adaptation of first insulating plug 22 and elbow type head shell can make like this to be sealed totally by test end elbow type head 11, when testing, isolated external humid air increases creepage distance, is difficult for flashover.
The sizes of the second insulating plug 41 and the third insulating plug 42 are matched with the size of the elbow head shell, so that the tail end elbow head 12 can be completely sealed, external humid air is isolated when a test is carried out, the creepage distance is increased, and flashover is not easy to occur.
The first insulating plug 22, the second insulating plug 41 and the third insulating plug 42 are arranged in a T shape, so that the diameter of one end close to the connecting terminal is smaller than that of the other end far away from the connecting terminal, and the sealing performance of the elbow-shaped head is further improved.
Wherein, the elbow type head shell is made of semi-conductive materials.
The first insulating plug 22 and the second insulating plug 41 are made of epoxy resin, and the epoxy resin has the advantages of excellent bonding strength to the surfaces of metal and nonmetal materials, good dielectric property and high hardness.
The elbow type cable 1 test system provided by the invention can be used for testing the independent elbow type cable 1, and the specific operation process is as follows: mainly through installing the first insulating plug 22 at the left end of the connection terminal of the tested end elbow head 11, then passing the conduit screw rod 221 of the first insulating plug 22 through the first connection hole 111 and screwing with the nut on the extension rod 21, realizing the sealing of the tested end elbow head 11, simultaneously prolonging the safety distance between the tested end elbow head 11 and the test clamp 3, installing the second insulating plug 41 and the third insulating plug 42 at the two sides of the tail end elbow head 12, passing the screw rod of the second insulating plug 41 through the second connection hole 121 and screwing with the threaded hole 421 of the third insulating plug 42, realizing the complete sealing of the tail end elbow head 12, when the test system of the elbow cable 1 is used for testing, the safety distance from the tested end elbow head 11 to other equipment can be increased, the elbow head does not need to be dismantled, the workload is reduced, the working efficiency is improved, and simultaneously the sealing of the tested end elbow head 11 and the tail end elbow head 12 can be realized, the creepage distance between the wiring terminal and the elbow-shaped head shell is increased, and flashover is not easy to occur.
The elbow type cable 1 test system provided by the invention can also be used for testing cables in a distribution cabinet, and the specific operation process is as follows: the extension rod 21 of the extension device of the tested end is directly connected with the screw rod on the wall bushing in the distribution cabinet, and the screw rod on the wall bushing is connected with the first nut 211 on the extension rod 21, so that the safety distance with other equipment is increased, the direct test can be carried out without taking down the elbow-shaped head and the stress cone, meanwhile, the tail end plugging device 4 is installed on the tail end elbow-shaped head 12, the tail end elbow-shaped head 12 is sealed, the specific operation and the tail end elbow-shaped head 12 sealing box body of the independent elbow-shaped cable 1 are omitted for further description.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. An elbow cable testing system, comprising:
the elbow type cable (1), the elbow type cable (1) includes the elbow type head (11) of the end to be tested and the tail end elbow type head (12), the terminal of the elbow type head (11) of the end to be tested has the first wiring hole (111), the terminal of the tail end elbow type head (12) has the second wiring hole (121);
the device for extending the tested end (2) comprises an extension rod (21) with a conductive core wire and a first insulating plug (22), the first insulating plug (22) is in threaded connection with the extension rod (21) after passing through the first wiring hole (111), the first insulating plug (22) is provided with a guide pipe screw rod (221), one end of the extension rod (21) is provided with a first nut (211) for screwing the guide pipe screw rod (221), and the other end of the extension rod (21) is connected with the test clip (3);
tail end plugging device (4), tail end plugging device (4) include second insulating stopper (41) and third insulating stopper (42), second insulating stopper (41) pass through behind second wiring hole (121) with third insulating stopper (42) threaded connection, second insulating stopper (41) have screw pole (411), set up the confession in third insulating stopper (42) screw hole (421) of screw pole (411) screw in.
2. Elbow cable testing system according to claim 1, characterised in that the conduit screw (221) of the first insulating plug (22) is provided with a second nut (222) for positioning.
3. The elbow cable testing system according to claim 2, wherein the first nut (211) is embedded in one end of the extension rod (21), the inner diameter of the first nut (211) is adapted to the conduit screw (221), and the outer diameter of the first nut (211) is adapted to the connection terminal of the tested end elbow head (11);
one end, provided with the guide pipe screw rod (221), of the first insulation plug (22) is provided with a first groove (223) matched with the second nut (222), and the width of the first groove (223) in the direction of the guide pipe screw rod (221) is larger than that of the second nut (222).
4. Elbow cable testing system according to claim 1, characterised in that a third nut (412) for positioning is provided on the lead screw (411) of the second insulating plug (41).
5. The elbow cable testing system according to claim 4, wherein one end of the second insulating plug (41) having the lead screw (411) is provided with a second groove (413) into which the third nut (412) fits, and the width of the second groove (413) is larger than the width of the third nut (412) in the direction of the lead screw (411);
the end of the third insulating plug (42) having the threaded hole (421) has a third recess (422) adapted to the terminal of the tail elbow head (12).
6. Elbow cable testing system according to claim 1, characterised in that the extension rod (21) has an end connected to the first insulating plug (22) dimensioned to fit the elbow head housing.
7. Elbow cable testing system according to claim 1, characterised in that the first (22), second (41) and third (42) insulation plugs are dimensioned to fit the size of the elbow head housing.
8. The elbow cable testing system according to any one of claims 6 or 7, wherein the elbow head housing is a semi-conductive material.
9. Elbow cable testing system according to any of the claims 1-7, characterized in that the outer shell of the extension rod (21) is of a flexible insulating material.
10. Elbow cable testing system according to any of claims 1-7, characterized in that the first insulating plug (22), the second insulating plug (41) and the third insulating plug (42) are all made of epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010498596.8A CN111596101B (en) | 2020-06-04 | 2020-06-04 | Elbow type cable test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010498596.8A CN111596101B (en) | 2020-06-04 | 2020-06-04 | Elbow type cable test system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111596101A true CN111596101A (en) | 2020-08-28 |
| CN111596101B CN111596101B (en) | 2023-01-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010498596.8A Active CN111596101B (en) | 2020-06-04 | 2020-06-04 | Elbow type cable test system |
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| CN (1) | CN111596101B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113341282A (en) * | 2021-06-02 | 2021-09-03 | 广东韶钢松山股份有限公司 | Cable voltage withstand test insulation protection device and use method thereof |
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| CN208820440U (en) * | 2018-08-16 | 2019-05-03 | 四川瑞霆电力科技有限公司 | The insulation plug of elbow-type cable connector with temp sensing function |
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|---|---|---|---|---|
| CN201466245U (en) * | 2009-08-19 | 2010-05-12 | 保定合力达应用化学有限公司 | Cable plug-pull head featuring convenient operation |
| US20170070005A1 (en) * | 2014-05-16 | 2017-03-09 | Pyungil Co., Ltd. | Grounding type elbow connector having electroscope therein |
| CN204595026U (en) * | 2015-04-15 | 2015-08-26 | 国家电网公司 | Elbow-type cable end test adapter |
| CN206099286U (en) * | 2016-09-30 | 2017-04-12 | 国网北京市电力公司 | A cable joint |
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| CN113341282A (en) * | 2021-06-02 | 2021-09-03 | 广东韶钢松山股份有限公司 | Cable voltage withstand test insulation protection device and use method thereof |
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| Publication number | Publication date |
|---|---|
| CN111596101B (en) | 2023-01-10 |
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